File:Mpl example temp co2 sun.svg
Jump to navigation
Jump to search
Size of this PNG preview of this SVG file: 720 × 540 pixels. Other resolutions: 320 × 240 pixels | 640 × 480 pixels | 1,024 × 768 pixels | 1,280 × 960 pixels | 2,560 × 1,920 pixels.
Original file (SVG file, nominally 720 × 540 pixels, file size: 123 KB)
Captions
Captions
Add a one-line explanation of what this file represents
Summary[edit]
| Description |
English: Global average temperature, atmospheric CO2, and sunspot activity since 1850. Thick lines for temperature and sunspots represent a 25 year moving average smoothing of the raw data. |
| Date | |
| Source | Own work |
| Author | Adrien F. Vincent |
Rationale: this work aims at providing an up-to-date version of the similar work https://commons.wikimedia.org/wiki/File:Temp-sunspot-co2.svg, done by Leland McInnes.
Data flat files, as well as source code with fully object-oriented matplotlib interface are now provided. Some minor cosmetic adjustements have also been performed.
The matplotlib (mpl) version is 1.5.3, with Python 2.7 and numpy 1.10
##########
## Copy of the data flat file "hadcrut4gl.txt" (CSV-like)
##########
#Data processed by www.woodfortrees.org
#Please check original source for first-hand data and information:
#
#----------------------------------------------------
#Data from Hadley Centre
#http://www.metoffice.gov.uk/hadobs/hadcrut4/data/download.html
#For terms and conditions of use, please see
#http://www.metoffice.gov.uk/hadobs/hadcrut4/terms_and_conditions.html
#----------------------------------------------------
#
#File: hadcrut4_monthly_ns_avg.txt
#
#Time series (hadcrut4) from 1850 to 2016.58
1850 -0.702
1850.08 -0.284
1850.17 -0.732
1850.25 -0.57
1850.33 -0.325
1850.42 -0.213
1850.5 -0.128
1850.58 -0.233
1850.67 -0.444
1850.75 -0.452
1850.83 -0.19
1850.92 -0.268
1851 -0.303
1851.08 -0.362
1851.17 -0.485
1851.25 -0.445
1851.33 -0.302
1851.42 -0.189
1851.5 -0.215
1851.58 -0.153
1851.67 -0.108
1851.75 -0.063
1851.83 -0.03
1851.92 -0.067
1852 -0.308
1852.08 -0.477
1852.17 -0.505
1852.25 -0.559
1852.33 -0.209
1852.42 -0.038
1852.5 -0.016
1852.58 -0.195
1852.67 -0.125
1852.75 -0.216
1852.83 -0.187
1852.92 0.083
1853 -0.177
1853.08 -0.33
1853.17 -0.318
1853.25 -0.352
1853.33 -0.268
1853.42 -0.179
1853.5 -0.059
1853.58 -0.148
1853.67 -0.409
1853.75 -0.359
1853.83 -0.256
1853.92 -0.444
1854 -0.36
1854.08 -0.28
1854.17 -0.284
1854.25 -0.349
1854.33 -0.23
1854.42 -0.215
1854.5 -0.228
1854.58 -0.163
1854.67 -0.115
1854.75 -0.188
1854.83 -0.369
1854.92 -0.232
1855 -0.176
1855.08 -0.4
1855.17 -0.303
1855.25 -0.217
1855.33 -0.336
1855.42 -0.16
1855.5 -0.268
1855.58 -0.159
1855.67 -0.339
1855.75 -0.211
1855.83 -0.212
1855.92 -0.51
1856 -0.119
1856.08 -0.373
1856.17 -0.513
1856.25 -0.371
1856.33 -0.119
1856.42 -0.288
1856.5 -0.297
1856.58 -0.305
1856.67 -0.459
1856.75 -0.384
1856.83 -0.608
1856.92 -0.44
1857 -0.512
1857.08 -0.344
1857.17 -0.434
1857.25 -0.646
1857.33 -0.567
1857.42 -0.31
1857.5 -0.544
1857.58 -0.327
1857.67 -0.393
1857.75 -0.467
1857.83 -0.665
1857.92 -0.356
1858 -0.532
1858.08 -0.707
1858.17 -0.55
1858.25 -0.517
1858.33 -0.651
1858.42 -0.58
1858.5 -0.324
1858.58 -0.28
1858.67 -0.339
1858.75 -0.2
1858.83 -0.644
1858.92 -0.3
1859 -0.307
1859.08 -0.192
1859.17 -0.334
1859.25 -0.203
1859.33 -0.31
1859.42 -0.25
1859.5 -0.285
1859.58 -0.104
1859.67 -0.575
1859.75 -0.255
1859.83 -0.316
1859.92 -0.363
1860 -0.186
1860.08 -0.428
1860.17 -0.643
1860.25 -0.335
1860.33 -0.29
1860.42 -0.307
1860.5 -0.116
1860.58 -0.193
1860.67 -0.229
1860.75 -0.198
1860.83 -0.508
1860.92 -0.752
1861 -0.89
1861.08 -0.506
1861.17 -0.465
1861.25 -0.395
1861.33 -0.761
1861.42 -0.183
1861.5 -0.221
1861.58 -0.107
1861.67 -0.331
1861.75 -0.355
1861.83 -0.424
1861.92 -0.253
1862 -0.749
1862.08 -0.773
1862.17 -0.402
1862.25 -0.24
1862.33 -0.232
1862.42 -0.338
1862.5 -0.34
1862.58 -0.694
1862.67 -0.413
1862.75 -0.42
1862.83 -0.753
1862.92 -0.889
1863 0.131
1863.08 -0.02
1863.17 -0.356
1863.25 -0.241
1863.33 -0.32
1863.42 -0.402
1863.5 -0.416
1863.58 -0.321
1863.67 -0.324
1863.75 -0.381
1863.83 -0.333
1863.92 -0.351
1864 -0.937
1864.08 -0.63
1864.17 -0.509
1864.25 -0.538
1864.33 -0.449
1864.42 -0.162
1864.5 -0.146
1864.58 -0.31
1864.67 -0.439
1864.75 -0.701
1864.83 -0.468
1864.92 -0.602
1865 -0.093
1865.08 -0.602
1865.17 -0.639
1865.25 -0.224
1865.33 -0.26
1865.42 -0.27
1865.5 -0.128
1865.58 -0.207
1865.67 -0.075
1865.75 -0.272
1865.83 -0.191
1865.92 -0.338
1866 0.039
1866.08 -0.212
1866.17 -0.595
1866.25 -0.263
1866.33 -0.528
1866.42 0.108
1866.5 0.027
1866.58 -0.261
1866.67 -0.225
1866.75 -0.417
1866.83 -0.301
1866.92 -0.337
1867 -0.305
1867.08 0.022
1867.17 -0.714
1867.25 -0.251
1867.33 -0.542
1867.42 -0.295
1867.5 -0.231
1867.58 -0.225
1867.67 -0.095
1867.75 -0.179
1867.83 -0.309
1867.92 -0.624
1868 -0.704
1868.08 -0.466
1868.17 -0.07
1868.25 -0.371
1868.33 -0.069
1868.42 -0.176
1868.5 0.147
1868.58 -0.037
1868.67 -0.196
1868.75 -0.232
1868.83 -0.5
1868.92 -0.12
1869 -0.259
1869.08 0.27
1869.17 -0.589
1869.25 -0.224
1869.33 -0.281
1869.42 -0.37
1869.5 -0.286
1869.58 -0.072
1869.67 -0.186
1869.75 -0.422
1869.83 -0.375
1869.92 -0.355
1870 -0.078
1870.08 -0.45
1870.17 -0.406
1870.25 -0.214
1870.33 -0.165
1870.42 -0.209
1870.5 0.016
1870.58 -0.262
1870.67 -0.263
1870.75 -0.393
1870.83 -0.164
1870.92 -0.723
1871 -0.527
1871.08 -0.546
1871.17 0.013
1871.25 -0.144
1871.33 -0.315
1871.42 -0.223
1871.5 -0.011
1871.58 -0.221
1871.67 -0.457
1871.75 -0.479
1871.83 -0.54
1871.92 -0.56
1872 -0.305
1872.08 -0.402
1872.17 -0.471
1872.25 -0.15
1872.33 -0.039
1872.42 -0.208
1872.5 -0.115
1872.58 -0.027
1872.67 -0.128
1872.75 -0.225
1872.83 -0.243
1872.92 -0.424
1873 -0.018
1873.08 -0.345
1873.17 -0.275
1873.25 -0.521
1873.33 -0.411
1873.42 -0.258
1873.5 -0.162
1873.58 -0.161
1873.67 -0.357
1873.75 -0.402
1873.83 -0.466
1873.92 -0.277
1874 0.054
1874.08 -0.44
1874.17 -0.562
1874.25 -0.507
1874.33 -0.466
1874.42 -0.458
1874.5 -0.174
1874.58 -0.368
1874.67 -0.212
1874.75 -0.436
1874.83 -0.503
1874.92 -0.407
1875 -0.577
1875.08 -0.613
1875.17 -0.598
1875.25 -0.462
1875.33 -0.176
1875.42 -0.234
1875.5 -0.302
1875.58 -0.183
1875.67 -0.274
1875.75 -0.371
1875.83 -0.5
1875.92 -0.495
1876 -0.311
1876.08 -0.265
1876.17 -0.383
1876.25 -0.3
1876.33 -0.53
1876.42 -0.284
1876.5 -0.134
1876.58 -0.241
1876.67 -0.434
1876.75 -0.385
1876.83 -0.575
1876.92 -0.71
1877 -0.325
1877.08 0.057
1877.17 -0.293
1877.25 -0.325
1877.33 -0.449
1877.42 -0.088
1877.5 0.01
1877.58 0.15
1877.67 0.028
1877.75 0.055
1877.83 0.104
1877.92 0.172
1878 0.173
1878.08 0.404
1878.17 0.342
1878.25 0.324
1878.33 -0.083
1878.42 0.015
1878.5 -0.05
1878.58 -0.024
1878.67 0.018
1878.75 -0.12
1878.83 -0.203
1878.92 -0.36
1879 -0.197
1879.08 -0.154
1879.17 -0.097
1879.25 -0.215
1879.33 -0.211
1879.42 -0.27
1879.5 -0.233
1879.58 -0.169
1879.67 -0.213
1879.75 -0.121
1879.83 -0.386
1879.92 -0.517
1880 -0.064
1880.08 -0.176
1880.17 -0.105
1880.25 -0.147
1880.33 -0.241
1880.42 -0.308
1880.5 -0.25
1880.58 -0.115
1880.67 -0.233
1880.75 -0.387
1880.83 -0.408
1880.92 -0.295
1881 -0.362
1881.08 -0.238
1881.17 -0.187
1881.25 -0.133
1881.33 -0.03
1881.42 -0.229
1881.5 -0.151
1881.58 -0.128
1881.67 -0.244
1881.75 -0.284
1881.83 -0.341
1881.92 -0.138
1882 0.114
1882.08 -0.009
1882.17 -0.053
1882.25 -0.283
1882.33 -0.373
1882.42 -0.317
1882.5 -0.185
1882.58 -0.221
1882.67 -0.155
1882.75 -0.337
1882.83 -0.313
1882.92 -0.463
1883 -0.409
1883.08 -0.322
1883.17 -0.342
1883.25 -0.394
1883.33 -0.253
1883.42 -0.119
1883.5 -0.195
1883.58 -0.209
1883.67 -0.278
1883.75 -0.381
1883.83 -0.305
1883.92 -0.324
1884 -0.418
1884.08 -0.217
1884.17 -0.459
1884.25 -0.529
1884.33 -0.392
1884.42 -0.413
1884.5 -0.424
1884.58 -0.41
1884.67 -0.342
1884.75 -0.322
1884.83 -0.558
1884.92 -0.416
1885 -0.508
1885.08 -0.411
1885.17 -0.484
1885.25 -0.472
1885.33 -0.521
1885.42 -0.488
1885.5 -0.311
1885.58 -0.51
1885.67 -0.333
1885.75 -0.249
1885.83 -0.261
1885.92 -0.156
1886 -0.401
1886.08 -0.455
1886.17 -0.415
1886.25 -0.336
1886.33 -0.191
1886.42 -0.387
1886.5 -0.285
1886.58 -0.341
1886.67 -0.433
1886.75 -0.363
1886.83 -0.422
1886.92 -0.427
1887 -0.566
1887.08 -0.556
1887.17 -0.458
1887.25 -0.436
1887.33 -0.354
1887.42 -0.406
1887.5 -0.267
1887.58 -0.367
1887.67 -0.343
1887.75 -0.506
1887.83 -0.408
1887.92 -0.397
1888 -0.603
1888.08 -0.453
1888.17 -0.543
1888.25 -0.243
1888.33 -0.349
1888.42 -0.291
1888.5 -0.308
1888.58 -0.281
1888.67 -0.216
1888.75 -0.106
1888.83 -0.197
1888.92 -0.176
1889 -0.054
1889.08 -0.095
1889.17 -0.068
1889.25 0.013
1889.33 -0.079
1889.42 -0.149
1889.5 -0.196
1889.58 -0.227
1889.67 -0.381
1889.75 -0.299
1889.83 -0.399
1889.92 -0.175
1890 -0.324
1890.08 -0.366
1890.17 -0.46
1890.25 -0.319
1890.33 -0.425
1890.42 -0.378
1890.5 -0.414
1890.58 -0.421
1890.67 -0.477
1890.75 -0.504
1890.83 -0.57
1890.92 -0.407
1891 -0.515
1891.08 -0.467
1891.17 -0.371
1891.25 -0.36
1891.33 -0.207
1891.42 -0.3
1891.5 -0.332
1891.58 -0.318
1891.67 -0.204
1891.75 -0.332
1891.83 -0.546
1891.92 -0.124
1892 -0.407
1892.08 -0.121
1892.17 -0.459
1892.25 -0.483
1892.33 -0.401
1892.42 -0.466
1892.5 -0.535
1892.58 -0.445
1892.67 -0.325
1892.75 -0.444
1892.83 -0.627
1892.92 -0.794
1893 -0.962
1893.08 -0.723
1893.17 -0.374
1893.25 -0.562
1893.33 -0.551
1893.42 -0.463
1893.5 -0.278
1893.58 -0.288
1893.67 -0.44
1893.75 -0.271
1893.83 -0.415
1893.92 -0.352
1894 -0.454
1894.08 -0.379
1894.17 -0.38
1894.25 -0.379
1894.33 -0.426
1894.42 -0.493
1894.5 -0.316
1894.58 -0.343
1894.67 -0.465
1894.75 -0.443
1894.83 -0.424
1894.92 -0.404
1895 -0.497
1895.08 -0.678
1895.17 -0.527
1895.25 -0.408
1895.33 -0.415
1895.42 -0.332
1895.5 -0.359
1895.58 -0.267
1895.67 -0.286
1895.75 -0.343
1895.83 -0.302
1895.92 -0.318
1896 -0.224
1896.08 -0.233
1896.17 -0.384
1896.25 -0.35
1896.33 -0.207
1896.42 -0.124
1896.5 -0.112
1896.58 -0.068
1896.67 -0.111
1896.75 -0.13
1896.83 -0.293
1896.92 -0.032
1897 -0.203
1897.08 -0.124
1897.17 -0.276
1897.25 -0.07
1897.33 -0.028
1897.42 -0.162
1897.5 -0.165
1897.58 -0.16
1897.67 -0.142
1897.75 -0.262
1897.83 -0.46
1897.92 -0.484
1898 -0.084
1898.08 -0.378
1898.17 -0.752
1898.25 -0.569
1898.33 -0.471
1898.42 -0.322
1898.5 -0.383
1898.58 -0.309
1898.67 -0.335
1898.75 -0.561
1898.83 -0.454
1898.92 -0.361
1899 -0.212
1899.08 -0.501
1899.17 -0.542
1899.25 -0.347
1899.33 -0.311
1899.42 -0.392
1899.5 -0.283
1899.58 -0.15
1899.67 -0.14
1899.75 -0.189
1899.83 0.027
1899.92 -0.457
1900 -0.246
1900.08 -0.164
1900.17 -0.276
1900.25 -0.252
1900.33 -0.276
1900.42 -0.184
1900.5 -0.193
1900.58 -0.184
1900.67 -0.223
1900.75 -0.06
1900.83 -0.262
1900.92 -0.087
1901 -0.182
1901.08 -0.27
1901.17 -0.246
1901.25 -0.193
1901.33 -0.197
1901.42 -0.159
1901.5 -0.194
1901.58 -0.199
1901.67 -0.349
1901.75 -0.298
1901.83 -0.446
1901.92 -0.442
1902 -0.239
1902.08 -0.27
1902.17 -0.393
1902.25 -0.449
1902.33 -0.405
1902.42 -0.449
1902.5 -0.392
1902.58 -0.369
1902.67 -0.37
1902.75 -0.486
1902.83 -0.534
1902.92 -0.524
1903 -0.274
1903.08 -0.204
1903.17 -0.355
1903.25 -0.472
1903.33 -0.464
1903.42 -0.551
1903.5 -0.496
1903.58 -0.593
1903.67 -0.528
1903.75 -0.658
1903.83 -0.627
1903.92 -0.604
1904 -0.641
1904.08 -0.603
1904.17 -0.659
1904.25 -0.553
1904.33 -0.538
1904.42 -0.526
1904.5 -0.53
1904.58 -0.483
1904.67 -0.485
1904.75 -0.48
1904.83 -0.386
1904.92 -0.417
1905 -0.471
1905.08 -0.697
1905.17 -0.461
1905.25 -0.555
1905.33 -0.343
1905.42 -0.329
1905.5 -0.298
1905.58 -0.309
1905.67 -0.322
1905.75 -0.37
1905.83 -0.224
1905.92 -0.205
1906 -0.073
1906.08 -0.238
1906.17 -0.293
1906.25 -0.114
1906.33 -0.336
1906.42 -0.296
1906.5 -0.321
1906.58 -0.324
1906.67 -0.388
1906.75 -0.353
1906.83 -0.43
1906.92 -0.283
1907 -0.443
1907.08 -0.519
1907.17 -0.343
1907.25 -0.508
1907.33 -0.552
1907.42 -0.528
1907.5 -0.407
1907.58 -0.461
1907.67 -0.413
1907.75 -0.359
1907.83 -0.581
1907.92 -0.535
1908 -0.423
1908.08 -0.417
1908.17 -0.636
1908.25 -0.545
1908.33 -0.474
1908.42 -0.478
1908.5 -0.478
1908.58 -0.539
1908.67 -0.458
1908.75 -0.586
1908.83 -0.595
1908.92 -0.577
1909 -0.583
1909.08 -0.543
1909.17 -0.689
1909.25 -0.609
1909.33 -0.589
1909.42 -0.52
1909.5 -0.585
1909.58 -0.325
1909.67 -0.402
1909.75 -0.48
1909.83 -0.432
1909.92 -0.6
1910 -0.359
1910.08 -0.517
1910.17 -0.485
1910.25 -0.453
1910.33 -0.473
1910.42 -0.486
1910.5 -0.469
1910.58 -0.443
1910.67 -0.443
1910.75 -0.484
1910.83 -0.653
1910.92 -0.669
1911 -0.558
1911.08 -0.767
1911.17 -0.701
1911.25 -0.719
1911.33 -0.602
1911.42 -0.574
1911.5 -0.516
1911.58 -0.501
1911.67 -0.511
1911.75 -0.465
1911.83 -0.378
1911.92 -0.291
1912 -0.362
1912.08 -0.297
1912.17 -0.385
1912.25 -0.336
1912.33 -0.377
1912.42 -0.32
1912.5 -0.458
1912.58 -0.561
1912.67 -0.563
1912.75 -0.643
1912.83 -0.515
1912.92 -0.487
1913 -0.465
1913.08 -0.515
1913.17 -0.534
1913.25 -0.433
1913.33 -0.509
1913.42 -0.51
1913.5 -0.443
1913.58 -0.395
1913.67 -0.428
1913.75 -0.429
1913.83 -0.27
1913.92 -0.238
1914 -0.092
1914.08 -0.226
1914.17 -0.335
1914.25 -0.388
1914.33 -0.28
1914.42 -0.29
1914.5 -0.337
1914.58 -0.215
1914.67 -0.261
1914.75 -0.153
1914.83 -0.176
1914.92 -0.245
1915 -0.117
1915.08 -0.057
1915.17 -0.193
1915.25 -0.056
1915.33 -0.218
1915.42 -0.221
1915.5 -0.118
1915.58 -0.076
1915.67 -0.141
1915.75 -0.259
1915.83 -0.14
1915.92 -0.256
1916 -0.245
1916.08 -0.186
1916.17 -0.405
1916.25 -0.344
1916.33 -0.363
1916.42 -0.473
1916.5 -0.38
1916.58 -0.348
1916.67 -0.343
1916.75 -0.403
1916.83 -0.573
1916.92 -0.627
1917 -0.684
1917.08 -0.762
1917.17 -0.826
1917.25 -0.476
1917.33 -0.655
1917.42 -0.351
1917.5 -0.12
1917.58 -0.223
1917.67 -0.123
1917.75 -0.39
1917.83 -0.396
1917.92 -0.624
1918 -0.505
1918.08 -0.524
1918.17 -0.446
1918.25 -0.492
1918.33 -0.424
1918.42 -0.332
1918.5 -0.342
1918.58 -0.364
1918.67 -0.238
1918.75 -0.098
1918.83 -0.033
1918.92 -0.227
1919 -0.098
1919.08 -0.079
1919.17 -0.302
1919.25 -0.074
1919.33 -0.265
1919.42 -0.252
1919.5 -0.364
1919.58 -0.33
1919.67 -0.232
1919.75 -0.305
1919.83 -0.531
1919.92 -0.456
1920 -0.244
1920.08 -0.425
1920.17 -0.123
1920.25 -0.265
1920.33 -0.191
1920.42 -0.215
1920.5 -0.291
1920.58 -0.231
1920.67 -0.137
1920.75 -0.224
1920.83 -0.284
1920.92 -0.345
1921 -0.137
1921.08 -0.179
1921.17 -0.251
1921.25 -0.228
1921.33 -0.204
1921.42 -0.117
1921.5 -0.138
1921.58 -0.279
1921.67 -0.162
1921.75 -0.139
1921.83 -0.301
1921.92 -0.153
1922 -0.398
1922.08 -0.273
1922.17 -0.269
1922.25 -0.235
1922.33 -0.382
1922.42 -0.32
1922.5 -0.229
1922.58 -0.347
1922.67 -0.283
1922.75 -0.322
1922.83 -0.288
1922.92 -0.304
1923 -0.23
1923.08 -0.414
1923.17 -0.408
1923.25 -0.361
1923.33 -0.321
1923.42 -0.244
1923.5 -0.347
1923.58 -0.378
1923.67 -0.321
1923.75 -0.264
1923.83 -0.02
1923.92 -0.004
1924 -0.315
1924.08 -0.202
1924.17 -0.27
1924.25 -0.28
1924.33 -0.239
1924.42 -0.216
1924.5 -0.264
1924.58 -0.276
1924.67 -0.279
1924.75 -0.313
1924.83 -0.362
1924.92 -0.526
1925 -0.398
1925.08 -0.305
1925.17 -0.223
1925.25 -0.276
1925.33 -0.258
1925.42 -0.254
1925.5 -0.217
1925.58 -0.13
1925.67 -0.189
1925.75 -0.305
1925.83 -0.056
1925.92 0.007
1926 0.09
1926.08 -0.042
1926.17 -0.022
1926.25 -0.169
1926.33 -0.219
1926.42 -0.092
1926.5 -0.235
1926.58 -0.087
1926.67 -0.104
1926.75 -0.085
1926.83 -0.109
1926.92 -0.234
1927 -0.254
1927.08 -0.146
1927.17 -0.326
1927.25 -0.26
1927.33 -0.259
1927.42 -0.238
1927.5 -0.146
1927.58 -0.144
1927.67 -0.132
1927.75 -0.04
1927.83 -0.173
1927.92 -0.425
1928 -0.05
1928.08 -0.138
1928.17 -0.339
1928.25 -0.255
1928.33 -0.286
1928.42 -0.344
1928.5 -0.165
1928.58 -0.176
1928.67 -0.223
1928.75 -0.169
1928.83 -0.157
1928.92 -0.235
1929 -0.479
1929.08 -0.666
1929.17 -0.406
1929.25 -0.389
1929.33 -0.389
1929.42 -0.35
1929.5 -0.362
1929.58 -0.189
1929.67 -0.267
1929.75 -0.18
1929.83 -0.074
1929.92 -0.473
1930 -0.33
1930.08 -0.293
1930.17 -0.155
1930.25 -0.193
1930.33 -0.197
1930.42 -0.162
1930.5 -0.12
1930.58 -0.057
1930.67 -0.078
1930.75 -0.093
1930.83 0.076
1930.92 -0.072
1931 -0.002
1931.08 -0.151
1931.17 -0.12
1931.25 -0.18
1931.33 -0.165
1931.42 -0.036
1931.5 0.007
1931.58 -0.047
1931.67 -0.047
1931.75 -0.04
1931.83 -0.148
1931.92 -0.101
1932 0.162
1932.08 -0.191
1932.17 -0.237
1932.25 -0.066
1932.33 -0.168
1932.42 -0.194
1932.5 -0.128
1932.58 -0.196
1932.67 -0.037
1932.75 -0.172
1932.83 -0.231
1932.92 -0.192
1933 -0.285
1933.08 -0.315
1933.17 -0.341
1933.25 -0.218
1933.33 -0.211
1933.42 -0.26
1933.5 -0.185
1933.58 -0.176
1933.67 -0.234
1933.75 -0.198
1933.83 -0.31
1933.92 -0.525
1934 -0.218
1934.08 -0.16
1934.17 -0.388
1934.25 -0.249
1934.33 -0.079
1934.42 -0.042
1934.5 -0.064
1934.58 -0.058
1934.67 -0.094
1934.75 -0.084
1934.83 0.024
1934.92 -0.132
1935 -0.223
1935.08 0.105
1935.17 -0.222
1935.25 -0.267
1935.33 -0.242
1935.42 -0.185
1935.5 -0.144
1935.58 -0.153
1935.67 -0.136
1935.75 -0.076
1935.83 -0.299
1935.92 -0.264
1936 -0.298
1936.08 -0.354
1936.17 -0.293
1936.25 -0.202
1936.33 -0.15
1936.42 -0.162
1936.5 -0.022
1936.58 -0.043
1936.67 -0.105
1936.75 -0.003
1936.83 -0.07
1936.92 -0.009
1937 -0.121
1937.08 0.039
1937.17 -0.273
1937.25 -0.128
1937.33 -0.079
1937.42 -0.008
1937.5 0.051
1937.58 0.082
1937.67 0.112
1937.75 0.121
1937.83 0.002
1937.92 -0.101
1938 0.019
1938.08 0.019
1938.17 0.064
1938.25 0.085
1938.33 -0.087
1938.42 -0.059
1938.5 -0.045
1938.58 0.013
1938.67 0.063
1938.75 0.147
1938.83 0.019
1938.92 -0.293
1939 -0.066
1939.08 -0.043
1939.17 -0.26
1939.25 -0.095
1939.33 -0.027
1939.42 0.062
1939.5 0.052
1939.58 0.04
1939.67 -0.072
1939.75 -0.273
1939.83 -0.121
1939.92 0.216
1940 -0.185
1940.08 -0.033
1940.17 -0.107
1940.25 0.065
1940.33 0.026
1940.42 0.037
1940.5 0.142
1940.58 0.05
1940.67 0.124
1940.75 0.013
1940.83 -0.06
1940.92 0.159
1941 -0.096
1941.08 -0.019
1941.17 -0.141
1941.25 0.023
1941.33 -0.02
1941.42 0.123
1941.5 0.116
1941.58 0.019
1941.67 -0.129
1941.75 0.219
1941.83 0.053
1941.92 0.101
1942 0.212
1942.08 -0.078
1942.17 -0.087
1942.25 -0.061
1942.33 -0.01
1942.42 0.034
1942.5 -0.074
1942.58 -0.061
1942.67 0.005
1942.75 -0.076
1942.83 -0.072
1942.92 0.013
1943 -0.202
1943.08 0.068
1943.17 -0.2
1943.25 0.006
1943.33 -0.013
1943.42 -0.094
1943.5 -0
1943.58 -0.001
1943.67 -0.014
1943.75 0.237
1943.83 0.027
1943.92 0.198
1944 0.29
1944.08 0.14
1944.17 0.148
1944.25 0.056
1944.33 0.068
1944.42 0.152
1944.5 0.221
1944.58 0.238
1944.67 0.303
1944.75 0.212
1944.83 0.009
1944.92 -0.02
1945 -0.003
1945.08 -0.086
1945.17 -0.039
1945.25 0.167
1945.33 -0.099
1945.42 0.006
1945.5 -0.08
1945.58 0.364
1945.67 0.162
1945.75 0.185
1945.83 -0.012
1945.92 -0.206
1946 0.101
1946.08 0.046
1946.17 -0.063
1946.25 0.135
1946.33 -0.121
1946.42 -0.266
1946.5 -0.048
1946.58 -0.146
1946.67 -0.007
1946.75 -0.048
1946.83 -0.091
1946.92 -0.357
1947 -0.116
1947.08 -0.18
1947.17 -0.066
1947.25 0.096
1947.33 -0.06
1947.42 0.007
1947.5 -0.006
1947.58 -0.038
1947.67 -0.075
1947.75 0.077
1947.83 0.043
1947.92 -0.175
1948 0.089
1948.08 -0.126
1948.17 -0.175
1948.25 -0.042
1948.33 0.109
1948.42 0.075
1948.5 -0.109
1948.58 -0.001
1948.67 -0.057
1948.75 0.031
1948.83 -0.051
1948.92 -0.203
1949 0.15
1949.08 -0.145
1949.17 -0.178
1949.25 0.009
1949.33 -0.043
1949.42 -0.186
1949.5 -0.089
1949.58 -0.038
1949.67 -0.072
1949.75 -0.032
1949.83 -0.077
1949.92 -0.188
1950 -0.333
1950.08 -0.245
1950.17 -0.178
1950.25 -0.165
1950.33 -0.087
1950.42 -0.074
1950.5 -0.039
1950.58 -0.112
1950.67 -0.106
1950.75 -0.125
1950.83 -0.391
1950.92 -0.254
1951 -0.355
1951.08 -0.463
1951.17 -0.298
1951.25 -0.105
1951.33 -0.013
1951.42 0.037
1951.5 0.049
1951.58 0.142
1951.67 0.093
1951.75 0.129
1951.83 -0.038
1951.92 0.174
1952 0.182
1952.08 0.135
1952.17 -0.13
1952.25 0.055
1952.33 0.04
1952.42 0.04
1952.5 0.099
1952.58 0.094
1952.67 0.098
1952.75 -0.009
1952.83 -0.189
1952.92 -0.06
1953 0.067
1953.08 0.146
1953.17 0.13
1953.25 0.195
1953.33 0.138
1953.42 0.164
1953.5 0.054
1953.58 0.095
1953.67 0.076
1953.75 0.073
1953.83 -0.073
1953.92 0.09
1954 -0.237
1954.08 -0.088
1954.17 -0.155
1954.25 -0.151
1954.33 -0.207
1954.42 -0.13
1954.5 -0.198
1954.58 -0.094
1954.67 -0.087
1954.75 -0.036
1954.83 0.022
1954.92 -0.235
1955 0.125
1955.08 -0.166
1955.17 -0.405
1955.25 -0.244
1955.33 -0.235
1955.42 -0.168
1955.5 -0.2
1955.58 -0.063
1955.67 -0.117
1955.75 -0.164
1955.83 -0.313
1955.92 -0.336
1956 -0.248
1956.08 -0.348
1956.17 -0.311
1956.25 -0.335
1956.33 -0.28
1956.42 -0.225
1956.5 -0.211
1956.58 -0.243
1956.67 -0.281
1956.75 -0.23
1956.83 -0.259
1956.92 -0.207
1957 -0.167
1957.08 -0.129
1957.17 -0.185
1957.25 -0.064
1957.33 0.052
1957.42 0.084
1957.5 0.003
1957.58 0.094
1957.67 0.038
1957.75 -0.013
1957.83 0.056
1957.92 0.158
1958 0.269
1958.08 0.183
1958.17 -0.004
1958.25 0.038
1958.33 0.035
1958.42 -0.016
1958.5 0.041
1958.58 0.01
1958.67 -0.052
1958.75 0.015
1958.83 0.012
1958.92 0.027
1959 0.087
1959.08 0.03
1959.17 0.08
1959.25 0.046
1959.33 -0.012
1959.42 0.063
1959.5 0.03
1959.58 0.048
1959.67 0.038
1959.75 -0.035
1959.83 -0.112
1959.92 -0.07
1960 -0.029
1960.08 0.102
1960.17 -0.316
1960.25 -0.176
1960.33 -0.154
1960.42 -0.029
1960.5 -0.027
1960.58 0.007
1960.67 0.062
1960.75 -0.027
1960.83 -0.15
1960.92 0.141
1961 0.046
1961.08 0.185
1961.17 0.096
1961.25 0.097
1961.33 0.087
1961.42 0.108
1961.5 0.016
1961.58 0.03
1961.67 -0.029
1961.75 -0.031
1961.83 -0.02
1961.92 -0.112
1962 0.055
1962.08 0.139
1962.17 0.027
1962.25 0.025
1962.33 -0.044
1962.42 -0.054
1962.5 0.016
1962.58 -0.003
1962.67 -0.014
1962.75 0.045
1962.83 0.009
1962.92 -0.01
1963 -0.05
1963.08 0.152
1963.17 -0.142
1963.25 -0.067
1963.33 -0.021
1963.42 -0.033
1963.5 0.11
1963.58 0.127
1963.67 0.126
1963.75 0.224
1963.83 0.161
1963.92 -0.007
1964 -0.045
1964.08 -0.124
1964.17 -0.276
1964.25 -0.244
1964.33 -0.175
1964.42 -0.159
1964.5 -0.171
1964.58 -0.258
1964.67 -0.284
1964.75 -0.268
1964.83 -0.297
1964.92 -0.356
1965 -0.103
1965.08 -0.244
1965.17 -0.215
1965.25 -0.255
1965.33 -0.159
1965.42 -0.11
1965.5 -0.181
1965.58 -0.112
1965.67 -0.095
1965.75 -0.03
1965.83 -0.14
1965.92 -0.066
1966 -0.096
1966.08 -0.094
1966.17 -0.063
1966.25 -0.107
1966.33 -0.141
1966.42 0.035
1966.5 0.031
1966.58 -0.022
1966.67 -0.04
1966.75 -0.105
1966.83 -0.096
1966.92 -0.144
1967 -0.167
1967.08 -0.235
1967.17 -0.052
1967.25 -0.068
1967.33 0.073
1967.42 -0.086
1967.5 -0.066
1967.58 -0.065
1967.67 -0.097
1967.75 0.06
1967.83 -0.064
1967.92 -0.151
1968 -0.242
1968.08 -0.214
1968.17 0.036
1968.25 -0.17
1968.33 -0.221
1968.42 -0.106
1968.5 -0.103
1968.58 -0.06
1968.67 -0.086
1968.75 -0.018
1968.83 -0.07
1968.92 -0.11
1969 -0.171
1969.08 -0.17
1969.17 -0.004
1969.25 0.108
1969.33 0.126
1969.42 0.023
1969.5 0.038
1969.58 0.051
1969.67 0.015
1969.75 0.023
1969.83 0.132
1969.92 0.194
1970 0.072
1970.08 0.143
1970.17 -0.069
1970.25 0.058
1970.33 -0.036
1970.42 -0.014
1970.5 -0.049
1970.58 -0.09
1970.67 -0.039
1970.75 -0.074
1970.83 -0.049
1970.92 -0.165
1971 -0.097
1971.08 -0.291
1971.17 -0.286
1971.25 -0.237
1971.33 -0.215
1971.42 -0.233
1971.5 -0.129
1971.58 -0.168
1971.67 -0.123
1971.75 -0.16
1971.83 -0.08
1971.92 -0.204
1972 -0.376
1972.08 -0.287
1972.17 -0.134
1972.25 -0.079
1972.33 -0.065
1972.42 0.003
1972.5 -0.025
1972.58 0.013
1972.67 -0.059
1972.75 0.002
1972.83 -0.005
1972.92 0.183
1973 0.146
1973.08 0.276
1973.17 0.226
1973.25 0.162
1973.33 0.086
1973.42 0.11
1973.5 0.025
1973.58 0.018
1973.67 -0.038
1973.75 -0.041
1973.83 -0.095
1973.92 -0.108
1974 -0.376
1974.08 -0.406
1974.17 -0.233
1974.25 -0.179
1974.33 -0.195
1974.42 -0.151
1974.5 -0.125
1974.58 -0.082
1974.67 -0.129
1974.75 -0.215
1974.83 -0.211
1974.92 -0.237
1975 -0.071
1975.08 -0.092
1975.17 -0.075
1975.25 -0.088
1975.33 -0.083
1975.42 -0.084
1975.5 -0.109
1975.58 -0.179
1975.67 -0.126
1975.75 -0.228
1975.83 -0.313
1975.92 -0.304
1976 -0.23
1976.08 -0.323
1976.17 -0.442
1976.25 -0.196
1976.33 -0.317
1976.42 -0.25
1976.5 -0.185
1976.58 -0.201
1976.67 -0.164
1976.75 -0.313
1976.83 -0.176
1976.92 -0.081
1977 -0.081
1977.08 0.079
1977.17 0.104
1977.25 0.094
1977.33 0.069
1977.42 0.109
1977.5 0.06
1977.58 -0.001
1977.67 0.032
1977.75 -0.006
1977.83 0.137
1977.92 -0.056
1978 0.014
1978.08 -0.038
1978.17 0.027
1978.25 -0.062
1978.33 -0.089
1978.42 -0.133
1978.5 -0.063
1978.58 -0.188
1978.67 -0.054
1978.75 -0.116
1978.83 0.045
1978.92 -0.1
1979 -0.038
1979.08 -0.14
1979.17 0.014
1979.25 -0.048
1979.33 -0.03
1979.42 0.058
1979.5 0.054
1979.58 0.08
1979.67 0.092
1979.75 0.131
1979.83 0.147
1979.92 0.356
1980 0.133
1980.08 0.219
1980.17 0.072
1980.25 0.14
1980.33 0.139
1980.42 0.07
1980.5 0.06
1980.58 0.036
1980.67 0.037
1980.75 0.007
1980.83 0.131
1980.92 0.058
1981 0.334
1981.08 0.196
1981.17 0.207
1981.25 0.128
1981.33 0.066
1981.42 0.123
1981.5 0.094
1981.58 0.122
1981.67 0.072
1981.75 0.003
1981.83 0.071
1981.92 0.267
1982 -0.048
1982.08 0.005
1982.17 -0.127
1982.25 0.026
1982.33 0.043
1982.42 -0.049
1982.5 -0.019
1982.58 -0.009
1982.67 0.074
1982.75 0.005
1982.83 -0.01
1982.92 0.253
1983 0.431
1983.08 0.31
1983.17 0.209
1983.25 0.115
1983.33 0.135
1983.42 0.136
1983.5 0.151
1983.58 0.198
1983.67 0.188
1983.75 0.099
1983.83 0.257
1983.92 0.083
1984 0.12
1984.08 0.017
1984.17 0.05
1984.25 -0.041
1984.33 0.09
1984.42 -0.014
1984.5 -0.034
1984.58 0.04
1984.67 0.036
1984.75 -0.023
1984.83 -0.124
1984.92 -0.277
1985 0.008
1985.08 -0.138
1985.17 -0.026
1985.25 -0.035
1985.33 -0.002
1985.42 -0.059
1985.5 -0.057
1985.58 0.03
1985.67 -0.03
1985.75 0.021
1985.83 -0.077
1985.92 0.013
1986 0.127
1986.08 0.089
1986.17 0.076
1986.25 0.082
1986.33 0.044
1986.42 0.051
1986.5 -0
1986.58 0.005
1986.67 0.013
1986.75 0.064
1986.83 -0.004
1986.92 0.01
1987 0.112
1987.08 0.302
1987.17 0.024
1987.25 0.093
1987.33 0.143
1987.42 0.125
1987.5 0.266
1987.58 0.233
1987.67 0.272
1987.75 0.2
1987.83 0.196
1987.92 0.322
1988 0.39
1988.08 0.229
1988.17 0.268
1988.25 0.228
1988.33 0.21
1988.42 0.224
1988.5 0.181
1988.58 0.179
1988.67 0.188
1988.75 0.146
1988.83 0.03
1988.92 0.149
1989 0.015
1989.08 0.147
1989.17 0.135
1989.25 0.08
1989.33 0.079
1989.42 0.079
1989.5 0.162
1989.58 0.181
1989.67 0.145
1989.75 0.154
1989.83 0.062
1989.92 0.21
1990 0.222
1990.08 0.307
1990.17 0.562
1990.25 0.367
1990.33 0.28
1990.42 0.279
1990.5 0.234
1990.58 0.252
1990.67 0.175
1990.75 0.33
1990.83 0.316
1990.92 0.247
1991 0.288
1991.08 0.292
1991.17 0.19
1991.25 0.385
1991.33 0.302
1991.42 0.306
1991.5 0.312
1991.58 0.261
1991.67 0.243
1991.75 0.187
1991.83 0.158
1991.92 0.125
1992 0.366
1992.08 0.321
1992.17 0.252
1992.25 0.144
1992.33 0.178
1992.42 0.127
1992.5 -0.013
1992.58 0.006
1992.67 -0.059
1992.75 -0.05
1992.83 -0.089
1992.92 0.078
1993 0.312
1993.08 0.252
1993.17 0.244
1993.25 0.131
1993.33 0.179
1993.42 0.177
1993.5 0.133
1993.58 0.096
1993.67 0.062
1993.75 0.098
1993.83 -0.046
1993.92 0.119
1994 0.178
1994.08 -0.052
1994.17 0.22
1994.25 0.206
1994.33 0.271
1994.42 0.265
1994.5 0.173
1994.58 0.182
1994.67 0.187
1994.75 0.307
1994.83 0.308
1994.92 0.245
1995 0.419
1995.08 0.595
1995.17 0.325
1995.25 0.284
1995.33 0.216
1995.42 0.308
1995.5 0.327
1995.58 0.354
1995.67 0.252
1995.75 0.329
1995.83 0.322
1995.92 0.127
1996 0.115
1996.08 0.323
1996.17 0.186
1996.25 0.13
1996.33 0.216
1996.42 0.17
1996.5 0.221
1996.58 0.205
1996.67 0.099
1996.75 0.135
1996.83 0.149
1996.92 0.234
1997 0.206
1997.08 0.318
1997.17 0.347
1997.25 0.273
1997.33 0.286
1997.42 0.402
1997.5 0.366
1997.58 0.438
1997.67 0.475
1997.75 0.554
1997.83 0.498
1997.92 0.505
1998 0.483
1998.08 0.763
1998.17 0.558
1998.25 0.636
1998.33 0.573
1998.42 0.592
1998.5 0.672
1998.58 0.603
1998.67 0.392
1998.75 0.404
1998.83 0.295
1998.92 0.473
1999 0.347
1999.08 0.589
1999.17 0.228
1999.25 0.327
1999.33 0.245
1999.42 0.273
1999.5 0.291
1999.58 0.223
1999.67 0.298
1999.75 0.254
1999.83 0.237
1999.92 0.383
2000 0.227
2000.08 0.455
2000.17 0.382
2000.25 0.479
2000.33 0.28
2000.42 0.275
2000.5 0.262
2000.58 0.358
2000.67 0.307
2000.75 0.222
2000.83 0.162
2000.92 0.151
2001 0.363
2001.08 0.325
2001.17 0.515
2001.25 0.453
2001.33 0.414
2001.42 0.43
2001.5 0.465
2001.58 0.5
2001.67 0.418
2001.75 0.417
2001.83 0.611
2001.92 0.37
2002 0.661
2002.08 0.705
2002.17 0.699
2002.25 0.465
2002.33 0.425
2002.42 0.476
2002.5 0.487
2002.58 0.445
2002.67 0.42
2002.75 0.407
2002.83 0.449
2002.92 0.327
2003 0.596
2003.08 0.453
2003.17 0.459
2003.25 0.437
2003.33 0.477
2003.42 0.46
2003.5 0.477
2003.58 0.55
2003.67 0.542
2003.75 0.612
2003.83 0.459
2003.92 0.595
2004 0.502
2004.08 0.611
2004.17 0.525
2004.25 0.479
2004.33 0.315
2004.42 0.328
2004.5 0.358
2004.58 0.397
2004.67 0.442
2004.75 0.472
2004.83 0.6
2004.92 0.359
2005 0.55
2005.08 0.395
2005.17 0.56
2005.25 0.603
2005.33 0.52
2005.42 0.552
2005.5 0.55
2005.58 0.54
2005.67 0.566
2005.75 0.608
2005.83 0.629
2005.92 0.472
2006 0.385
2006.08 0.562
2006.17 0.463
2006.25 0.407
2006.33 0.401
2006.42 0.525
2006.5 0.488
2006.58 0.532
2006.67 0.499
2006.75 0.562
2006.83 0.541
2006.92 0.698
2007 0.832
2007.08 0.56
2007.17 0.524
2007.25 0.581
2007.33 0.447
2007.42 0.419
2007.5 0.441
2007.58 0.443
2007.67 0.459
2007.75 0.481
2007.83 0.387
2007.92 0.349
2008 0.171
2008.08 0.245
2008.17 0.55
2008.25 0.331
2008.33 0.34
2008.42 0.362
2008.5 0.451
2008.58 0.432
2008.67 0.406
2008.75 0.547
2008.83 0.524
2008.92 0.391
2009 0.481
2009.08 0.441
2009.17 0.406
2009.25 0.515
2009.33 0.441
2009.42 0.554
2009.5 0.539
2009.58 0.589
2009.67 0.564
2009.75 0.515
2009.83 0.545
2009.92 0.474
2010 0.561
2010.08 0.577
2010.17 0.678
2010.25 0.679
2010.33 0.591
2010.42 0.587
2010.5 0.619
2010.58 0.543
2010.67 0.442
2010.75 0.496
2010.83 0.593
2010.92 0.343
2011 0.313
2011.08 0.327
2011.17 0.425
2011.25 0.48
2011.33 0.384
2011.42 0.489
2011.5 0.51
2011.58 0.488
2011.67 0.454
2011.75 0.453
2011.83 0.347
2011.92 0.401
2012 0.306
2012.08 0.302
2012.17 0.358
2012.25 0.575
2012.33 0.574
2012.42 0.557
2012.5 0.51
2012.58 0.536
2012.67 0.553
2012.75 0.556
2012.83 0.554
2012.92 0.275
2013 0.45
2013.08 0.486
2013.17 0.401
2013.25 0.439
2013.33 0.52
2013.42 0.487
2013.5 0.514
2013.58 0.533
2013.67 0.535
2013.75 0.497
2013.83 0.639
2013.92 0.508
2014 0.523
2014.08 0.313
2014.17 0.561
2014.25 0.657
2014.33 0.599
2014.42 0.618
2014.5 0.541
2014.58 0.666
2014.67 0.589
2014.75 0.626
2014.83 0.489
2014.92 0.634
2015 0.688
2015.08 0.66
2015.17 0.681
2015.25 0.656
2015.33 0.696
2015.42 0.73
2015.5 0.696
2015.58 0.732
2015.67 0.784
2015.75 0.82
2015.83 0.81
2015.92 1.01
2016 0.909
2016.08 1.074
2016.17 1.07
2016.25 0.918
2016.33 0.69
2016.42 0.736
2016.5 0.736
#Data ends
#Number of samples: 1999
#Mean: -0.102501
e
####################
## Copy of the data flat file "co2_mm_mlo.txt" (CSV-like)
##########
# --------------------------------------------------------------------
# USE OF NOAA ESRL DATA
#
# These data are made freely available to the public and the
# scientific community in the belief that their wide dissemination
# will lead to greater understanding and new scientific insights.
# The availability of these data does not constitute publication
# of the data. NOAA relies on the ethics and integrity of the user to
# insure that ESRL receives fair credit for their work. If the data
# are obtained for potential use in a publication or presentation,
# ESRL should be informed at the outset of the nature of this work.
# If the ESRL data are essential to the work, or if an important
# result or conclusion depends on the ESRL data, co-authorship
# may be appropriate. This should be discussed at an early stage in
# the work. Manuscripts using the ESRL data should be sent to ESRL
# for review before they are submitted for publication so we can
# insure that the quality and limitations of the data are accurately
# represented.
#
# Contact: Pieter Tans (303 497 6678; pieter.tans@noaa.gov)
#
# File Creation: Tue Sep 6 11:42:18 2016
#
# RECIPROCITY
#
# Use of these data implies an agreement to reciprocate.
# Laboratories making similar measurements agree to make their
# own data available to the general public and to the scientific
# community in an equally complete and easily accessible form.
# Modelers are encouraged to make available to the community,
# upon request, their own tools used in the interpretation
# of the ESRL data, namely well documented model code, transport
# fields, and additional information necessary for other
# scientists to repeat the work and to run modified versions.
# Model availability includes collaborative support for new
# users of the models.
# --------------------------------------------------------------------
#
#
# See www.esrl.noaa.gov/gmd/ccgg/trends/ for additional details.
#
# Data from March 1958 through April 1974 have been obtained by C. David Keeling
# of the Scripps Institution of Oceanography (SIO) and were obtained from the
# Scripps website (scrippsco2.ucsd.edu).
#
# The "average" column contains the monthly mean CO2 mole fraction determined
# from daily averages. The mole fraction of CO2, expressed as parts per million
# (ppm) is the number of molecules of CO2 in every one million molecules of dried
# air (water vapor removed). If there are missing days concentrated either early
# or late in the month, the monthly mean is corrected to the middle of the month
# using the average seasonal cycle. Missing months are denoted by -99.99.
# The "interpolated" column includes average values from the preceding column
# and interpolated values where data are missing. Interpolated values are
# computed in two steps. First, we compute for each month the average seasonal
# cycle in a 7-year window around each monthly value. In this way the seasonal
# cycle is allowed to change slowly over time. We then determine the "trend"
# value for each month by removing the seasonal cycle; this result is shown in
# the "trend" column. Trend values are linearly interpolated for missing months.
# The interpolated monthly mean is then the sum of the average seasonal cycle
# value and the trend value for the missing month.
#
# NOTE: In general, the data presented for the last year are subject to change,
# depending on recalibration of the reference gas mixtures used, and other quality
# control procedures. Occasionally, earlier years may also be changed for the same
# reasons. Usually these changes are minor.
#
# CO2 expressed as a mole fraction in dry air, micromol/mol, abbreviated as ppm
#
# (-99.99 missing data; -1 no data for #daily means in month)
#
# decimal average interpolated trend #days
# date (season corr)
1958 3 1958.208 315.71 315.71 314.62 -1
1958 4 1958.292 317.45 317.45 315.29 -1
1958 5 1958.375 317.50 317.50 314.71 -1
1958 6 1958.458 -99.99 317.10 314.85 -1
1958 7 1958.542 315.86 315.86 314.98 -1
1958 8 1958.625 314.93 314.93 315.94 -1
1958 9 1958.708 313.20 313.20 315.91 -1
1958 10 1958.792 -99.99 312.66 315.61 -1
1958 11 1958.875 313.33 313.33 315.31 -1
1958 12 1958.958 314.67 314.67 315.61 -1
1959 1 1959.042 315.62 315.62 315.70 -1
1959 2 1959.125 316.38 316.38 315.88 -1
1959 3 1959.208 316.71 316.71 315.62 -1
1959 4 1959.292 317.72 317.72 315.56 -1
1959 5 1959.375 318.29 318.29 315.50 -1
1959 6 1959.458 318.15 318.15 315.92 -1
1959 7 1959.542 316.54 316.54 315.66 -1
1959 8 1959.625 314.80 314.80 315.81 -1
1959 9 1959.708 313.84 313.84 316.55 -1
1959 10 1959.792 313.26 313.26 316.19 -1
1959 11 1959.875 314.80 314.80 316.78 -1
1959 12 1959.958 315.58 315.58 316.52 -1
1960 1 1960.042 316.43 316.43 316.51 -1
1960 2 1960.125 316.97 316.97 316.47 -1
1960 3 1960.208 317.58 317.58 316.49 -1
1960 4 1960.292 319.02 319.02 316.86 -1
1960 5 1960.375 320.03 320.03 317.24 -1
1960 6 1960.458 319.59 319.59 317.36 -1
1960 7 1960.542 318.18 318.18 317.30 -1
1960 8 1960.625 315.91 315.91 316.92 -1
1960 9 1960.708 314.16 314.16 316.87 -1
1960 10 1960.792 313.83 313.83 316.76 -1
1960 11 1960.875 315.00 315.00 316.98 -1
1960 12 1960.958 316.19 316.19 317.13 -1
1961 1 1961.042 316.93 316.93 317.03 -1
1961 2 1961.125 317.70 317.70 317.28 -1
1961 3 1961.208 318.54 318.54 317.47 -1
1961 4 1961.292 319.48 319.48 317.27 -1
1961 5 1961.375 320.58 320.58 317.70 -1
1961 6 1961.458 319.77 319.77 317.48 -1
1961 7 1961.542 318.57 318.57 317.70 -1
1961 8 1961.625 316.79 316.79 317.80 -1
1961 9 1961.708 314.80 314.80 317.49 -1
1961 10 1961.792 315.38 315.38 318.35 -1
1961 11 1961.875 316.10 316.10 318.13 -1
1961 12 1961.958 317.01 317.01 317.94 -1
1962 1 1962.042 317.94 317.94 318.06 -1
1962 2 1962.125 318.56 318.56 318.11 -1
1962 3 1962.208 319.68 319.68 318.57 -1
1962 4 1962.292 320.63 320.63 318.45 -1
1962 5 1962.375 321.01 321.01 318.20 -1
1962 6 1962.458 320.55 320.55 318.27 -1
1962 7 1962.542 319.58 319.58 318.67 -1
1962 8 1962.625 317.40 317.40 318.48 -1
1962 9 1962.708 316.26 316.26 319.03 -1
1962 10 1962.792 315.42 315.42 318.33 -1
1962 11 1962.875 316.69 316.69 318.62 -1
1962 12 1962.958 317.69 317.69 318.61 -1
1963 1 1963.042 318.74 318.74 318.91 -1
1963 2 1963.125 319.08 319.08 318.68 -1
1963 3 1963.208 319.86 319.86 318.69 -1
1963 4 1963.292 321.39 321.39 319.09 -1
1963 5 1963.375 322.25 322.25 319.39 -1
1963 6 1963.458 321.47 321.47 319.16 -1
1963 7 1963.542 319.74 319.74 318.77 -1
1963 8 1963.625 317.77 317.77 318.83 -1
1963 9 1963.708 316.21 316.21 319.06 -1
1963 10 1963.792 315.99 315.99 319.00 -1
1963 11 1963.875 317.12 317.12 319.10 -1
1963 12 1963.958 318.31 318.31 319.25 -1
1964 1 1964.042 319.57 319.57 319.67 -1
1964 2 1964.125 -99.99 320.07 319.61 -1
1964 3 1964.208 -99.99 320.73 319.55 -1
1964 4 1964.292 -99.99 321.77 319.48 -1
1964 5 1964.375 322.25 322.25 319.42 -1
1964 6 1964.458 321.89 321.89 319.69 -1
1964 7 1964.542 320.44 320.44 319.58 -1
1964 8 1964.625 318.70 318.70 319.81 -1
1964 9 1964.708 316.70 316.70 319.56 -1
1964 10 1964.792 316.79 316.79 319.78 -1
1964 11 1964.875 317.79 317.79 319.72 -1
1964 12 1964.958 318.71 318.71 319.59 -1
1965 1 1965.042 319.44 319.44 319.48 -1
1965 2 1965.125 320.44 320.44 319.97 -1
1965 3 1965.208 320.89 320.89 319.65 -1
1965 4 1965.292 322.13 322.13 319.80 -1
1965 5 1965.375 322.16 322.16 319.36 -1
1965 6 1965.458 321.87 321.87 319.65 -1
1965 7 1965.542 321.39 321.39 320.51 -1
1965 8 1965.625 318.81 318.81 319.93 -1
1965 9 1965.708 317.81 317.81 320.68 -1
1965 10 1965.792 317.30 317.30 320.36 -1
1965 11 1965.875 318.87 318.87 320.87 -1
1965 12 1965.958 319.42 319.42 320.26 -1
1966 1 1966.042 320.62 320.62 320.63 -1
1966 2 1966.125 321.59 321.59 321.10 -1
1966 3 1966.208 322.39 322.39 321.16 -1
1966 4 1966.292 323.87 323.87 321.51 -1
1966 5 1966.375 324.01 324.01 321.18 -1
1966 6 1966.458 323.75 323.75 321.52 -1
1966 7 1966.542 322.39 322.39 321.49 -1
1966 8 1966.625 320.37 320.37 321.50 -1
1966 9 1966.708 318.64 318.64 321.54 -1
1966 10 1966.792 318.10 318.10 321.18 -1
1966 11 1966.875 319.79 319.79 321.84 -1
1966 12 1966.958 321.08 321.08 321.95 -1
1967 1 1967.042 322.07 322.07 322.07 -1
1967 2 1967.125 322.50 322.50 321.94 -1
1967 3 1967.208 323.04 323.04 321.72 -1
1967 4 1967.292 324.42 324.42 322.05 -1
1967 5 1967.375 325.00 325.00 322.27 -1
1967 6 1967.458 324.09 324.09 321.94 -1
1967 7 1967.542 322.55 322.55 321.66 -1
1967 8 1967.625 320.92 320.92 322.04 -1
1967 9 1967.708 319.31 319.31 322.19 -1
1967 10 1967.792 319.31 319.31 322.36 -1
1967 11 1967.875 320.72 320.72 322.78 -1
1967 12 1967.958 321.96 321.96 322.86 -1
1968 1 1968.042 322.57 322.57 322.55 -1
1968 2 1968.125 323.15 323.15 322.56 -1
1968 3 1968.208 323.89 323.89 322.59 -1
1968 4 1968.292 325.02 325.02 322.73 -1
1968 5 1968.375 325.57 325.57 322.87 -1
1968 6 1968.458 325.36 325.36 323.20 -1
1968 7 1968.542 324.14 324.14 323.25 -1
1968 8 1968.625 322.03 322.03 323.15 -1
1968 9 1968.708 320.41 320.41 323.31 -1
1968 10 1968.792 320.25 320.25 323.32 -1
1968 11 1968.875 321.31 321.31 323.32 -1
1968 12 1968.958 322.84 322.84 323.69 -1
1969 1 1969.042 324.00 324.00 323.98 -1
1969 2 1969.125 324.42 324.42 323.89 -1
1969 3 1969.208 325.64 325.64 324.41 -1
1969 4 1969.292 326.66 326.66 324.35 -1
1969 5 1969.375 327.34 327.34 324.57 -1
1969 6 1969.458 326.76 326.76 324.63 -1
1969 7 1969.542 325.88 325.88 325.08 -1
1969 8 1969.625 323.67 323.67 324.80 -1
1969 9 1969.708 322.38 322.38 325.28 -1
1969 10 1969.792 321.78 321.78 324.84 -1
1969 11 1969.875 322.85 322.85 324.78 -1
1969 12 1969.958 324.11 324.11 324.88 -1
1970 1 1970.042 325.03 325.03 325.04 -1
1970 2 1970.125 325.99 325.99 325.42 -1
1970 3 1970.208 326.87 326.87 325.69 -1
1970 4 1970.292 328.13 328.13 325.86 -1
1970 5 1970.375 328.07 328.07 325.27 -1
1970 6 1970.458 327.66 327.66 325.52 -1
1970 7 1970.542 326.35 326.35 325.51 -1
1970 8 1970.625 324.69 324.69 325.76 -1
1970 9 1970.708 323.10 323.10 325.93 -1
1970 10 1970.792 323.16 323.16 326.15 -1
1970 11 1970.875 323.98 323.98 325.96 -1
1970 12 1970.958 325.13 325.13 326.06 -1
1971 1 1971.042 326.17 326.17 326.26 -1
1971 2 1971.125 326.68 326.68 326.09 -1
1971 3 1971.208 327.18 327.18 325.94 -1
1971 4 1971.292 327.78 327.78 325.47 -1
1971 5 1971.375 328.92 328.92 326.10 -1
1971 6 1971.458 328.57 328.57 326.41 -1
1971 7 1971.542 327.34 327.34 326.46 -1
1971 8 1971.625 325.46 325.46 326.49 -1
1971 9 1971.708 323.36 323.36 326.18 -1
1971 10 1971.792 323.57 323.57 326.58 -1
1971 11 1971.875 324.80 324.80 326.82 -1
1971 12 1971.958 326.01 326.01 327.02 -1
1972 1 1972.042 326.77 326.77 326.86 -1
1972 2 1972.125 327.63 327.63 327.05 -1
1972 3 1972.208 327.75 327.75 326.52 -1
1972 4 1972.292 329.72 329.72 327.41 -1
1972 5 1972.375 330.07 330.07 327.21 -1
1972 6 1972.458 329.09 329.09 326.94 -1
1972 7 1972.542 328.05 328.05 327.24 -1
1972 8 1972.625 326.32 326.32 327.37 -1
1972 9 1972.708 324.93 324.93 327.73 -1
1972 10 1972.792 325.06 325.06 328.05 -1
1972 11 1972.875 326.50 326.50 328.50 -1
1972 12 1972.958 327.55 327.55 328.56 -1
1973 1 1973.042 328.54 328.54 328.58 -1
1973 2 1973.125 329.56 329.56 328.87 -1
1973 3 1973.208 330.30 330.30 328.99 -1
1973 4 1973.292 331.50 331.50 329.12 -1
1973 5 1973.375 332.48 332.48 329.60 -1
1973 6 1973.458 332.07 332.07 329.96 -1
1973 7 1973.542 330.87 330.87 330.09 -1
1973 8 1973.625 329.31 329.31 330.43 -1
1973 9 1973.708 327.51 327.51 330.43 -1
1973 10 1973.792 327.18 327.18 330.23 -1
1973 11 1973.875 328.16 328.16 330.17 -1
1973 12 1973.958 328.64 328.64 329.66 -1
1974 1 1974.042 329.35 329.35 329.44 -1
1974 2 1974.125 330.71 330.71 330.11 -1
1974 3 1974.208 331.48 331.48 330.19 -1
1974 4 1974.292 332.65 332.65 330.25 -1
1974 5 1974.375 333.20 333.20 330.26 15
1974 6 1974.458 332.13 332.13 329.93 27
1974 7 1974.542 330.99 330.99 330.20 31
1974 8 1974.625 329.17 329.17 330.31 31
1974 9 1974.708 327.41 327.41 330.35 29
1974 10 1974.792 327.21 327.21 330.29 29
1974 11 1974.875 328.34 328.34 330.33 29
1974 12 1974.958 329.50 329.50 330.47 31
1975 1 1975.042 330.68 330.68 330.81 31
1975 2 1975.125 331.41 331.41 330.86 28
1975 3 1975.208 331.85 331.85 330.49 26
1975 4 1975.292 333.29 333.29 330.77 30
1975 5 1975.375 333.91 333.91 330.94 30
1975 6 1975.458 333.40 333.40 331.18 29
1975 7 1975.542 331.74 331.74 330.92 27
1975 8 1975.625 329.88 329.88 331.06 31
1975 9 1975.708 328.57 328.57 331.54 30
1975 10 1975.792 328.35 328.35 331.45 17
1975 11 1975.875 329.34 329.34 331.39 25
1975 12 1975.958 -99.99 330.59 331.60 1
1976 1 1976.042 331.66 331.66 331.82 25
1976 2 1976.125 332.75 332.75 332.19 29
1976 3 1976.208 333.46 333.46 331.99 29
1976 4 1976.292 334.78 334.78 332.24 25
1976 5 1976.375 334.78 334.78 331.86 31
1976 6 1976.458 334.06 334.06 331.74 25
1976 7 1976.542 332.95 332.95 332.06 21
1976 8 1976.625 330.64 330.64 331.87 31
1976 9 1976.708 328.96 328.96 331.94 28
1976 10 1976.792 328.77 328.77 331.92 30
1976 11 1976.875 330.18 330.18 332.33 26
1976 12 1976.958 331.65 331.65 332.69 24
1977 1 1977.042 332.69 332.69 332.75 29
1977 2 1977.125 333.23 333.23 332.60 26
1977 3 1977.208 334.97 334.97 333.36 29
1977 4 1977.292 336.03 336.03 333.39 29
1977 5 1977.375 336.82 336.82 333.87 30
1977 6 1977.458 336.10 336.10 333.76 25
1977 7 1977.542 334.79 334.79 333.96 28
1977 8 1977.625 332.53 332.53 333.92 30
1977 9 1977.708 331.19 331.19 334.27 27
1977 10 1977.792 331.21 331.21 334.43 30
1977 11 1977.875 332.35 332.35 334.59 28
1977 12 1977.958 333.47 333.47 334.48 31
1978 1 1978.042 335.10 335.10 335.11 26
1978 2 1978.125 335.26 335.26 334.58 28
1978 3 1978.208 336.61 336.61 334.95 30
1978 4 1978.292 337.77 337.77 335.11 28
1978 5 1978.375 338.01 338.01 335.05 30
1978 6 1978.458 337.98 337.98 335.60 27
1978 7 1978.542 336.48 336.48 335.68 31
1978 8 1978.625 334.37 334.37 335.88 31
1978 9 1978.708 332.33 332.33 335.49 24
1978 10 1978.792 332.41 332.41 335.66 31
1978 11 1978.875 333.76 333.76 336.01 28
1978 12 1978.958 334.83 334.83 335.79 31
1979 1 1979.042 336.21 336.21 336.23 31
1979 2 1979.125 336.65 336.65 335.94 27
1979 3 1979.208 338.13 338.13 336.40 29
1979 4 1979.292 338.94 338.94 336.21 24
1979 5 1979.375 339.00 339.00 336.01 20
1979 6 1979.458 339.20 339.20 336.79 30
1979 7 1979.542 337.60 337.60 336.78 29
1979 8 1979.625 335.56 335.56 337.10 29
1979 9 1979.708 333.93 333.93 337.17 26
1979 10 1979.792 334.12 334.12 337.44 28
1979 11 1979.875 335.26 335.26 337.54 30
1979 12 1979.958 336.78 336.78 337.76 24
1980 1 1980.042 337.80 337.80 337.95 30
1980 2 1980.125 338.28 338.28 337.73 28
1980 3 1980.208 340.04 340.04 338.43 31
1980 4 1980.292 340.86 340.86 338.20 30
1980 5 1980.375 341.47 341.47 338.45 31
1980 6 1980.458 341.26 341.26 338.79 30
1980 7 1980.542 339.34 339.34 338.48 26
1980 8 1980.625 337.45 337.45 338.92 24
1980 9 1980.708 336.10 336.10 339.27 26
1980 10 1980.792 336.05 336.05 339.32 29
1980 11 1980.875 337.21 337.21 339.38 27
1980 12 1980.958 338.29 338.29 339.23 27
1981 1 1981.042 339.36 339.36 339.41 31
1981 2 1981.125 340.51 340.51 339.89 28
1981 3 1981.208 341.57 341.57 339.98 31
1981 4 1981.292 342.56 342.56 339.93 30
1981 5 1981.375 343.01 343.01 339.99 31
1981 6 1981.458 342.49 342.49 340.02 28
1981 7 1981.542 340.68 340.68 339.81 31
1981 8 1981.625 338.49 338.49 339.97 28
1981 9 1981.708 336.92 336.92 340.17 30
1981 10 1981.792 337.12 337.12 340.44 31
1981 11 1981.875 338.59 338.59 340.76 30
1981 12 1981.958 339.90 339.90 340.81 28
1982 1 1982.042 340.92 340.92 341.03 30
1982 2 1982.125 341.69 341.69 341.05 27
1982 3 1982.208 342.86 342.86 341.22 21
1982 4 1982.292 343.92 343.92 341.31 9
1982 5 1982.375 344.67 344.67 341.63 31
1982 6 1982.458 343.78 343.78 341.32 29
1982 7 1982.542 342.23 342.23 341.45 28
1982 8 1982.625 340.11 340.11 341.61 27
1982 9 1982.708 338.32 338.32 341.53 26
1982 10 1982.792 338.39 338.39 341.72 30
1982 11 1982.875 339.48 339.48 341.62 28
1982 12 1982.958 340.88 340.88 341.77 31
1983 1 1983.042 341.64 341.64 341.79 31
1983 2 1983.125 342.87 342.87 342.30 27
1983 3 1983.208 343.59 343.59 342.04 30
1983 4 1983.292 345.25 345.25 342.63 26
1983 5 1983.375 345.96 345.96 342.80 29
1983 6 1983.458 345.52 345.52 343.03 25
1983 7 1983.542 344.15 344.15 343.42 30
1983 8 1983.625 342.25 342.25 343.72 28
1983 9 1983.708 340.17 340.17 343.34 27
1983 10 1983.792 340.30 340.30 343.63 31
1983 11 1983.875 341.53 341.53 343.66 29
1983 12 1983.958 343.07 343.07 343.97 26
1984 1 1984.042 344.05 344.05 344.15 31
1984 2 1984.125 344.77 344.77 344.21 29
1984 3 1984.208 345.46 345.46 344.00 23
1984 4 1984.292 -99.99 346.77 344.17 2
1984 5 1984.375 347.55 347.55 344.35 27
1984 6 1984.458 346.98 346.98 344.50 25
1984 7 1984.542 345.55 345.55 344.82 29
1984 8 1984.625 343.20 343.20 344.67 24
1984 9 1984.708 341.35 341.35 344.54 27
1984 10 1984.792 341.68 341.68 344.99 28
1984 11 1984.875 343.06 343.06 345.16 28
1984 12 1984.958 344.54 344.54 345.42 28
1985 1 1985.042 345.25 345.25 345.35 29
1985 2 1985.125 346.06 346.06 345.51 26
1985 3 1985.208 347.66 347.66 346.27 28
1985 4 1985.292 348.20 348.20 345.64 27
1985 5 1985.375 348.92 348.92 345.75 31
1985 6 1985.458 348.40 348.40 345.94 30
1985 7 1985.542 346.65 346.65 345.86 28
1985 8 1985.625 344.85 344.85 346.22 27
1985 9 1985.708 343.20 343.20 346.32 27
1985 10 1985.792 343.08 343.08 346.36 27
1985 11 1985.875 344.40 344.40 346.53 29
1985 12 1985.958 345.82 345.82 346.75 29
1986 1 1986.042 346.54 346.54 346.56 26
1986 2 1986.125 347.13 347.13 346.59 26
1986 3 1986.208 348.05 348.05 346.71 31
1986 4 1986.292 349.77 349.77 347.21 30
1986 5 1986.375 350.53 350.53 347.39 30
1986 6 1986.458 349.90 349.90 347.47 24
1986 7 1986.542 348.11 348.11 347.30 26
1986 8 1986.625 346.09 346.09 347.49 29
1986 9 1986.708 345.01 345.01 348.16 25
1986 10 1986.792 344.47 344.47 347.71 30
1986 11 1986.875 345.86 345.86 347.99 30
1986 12 1986.958 347.15 347.15 348.06 30
1987 1 1987.042 348.38 348.38 348.31 30
1987 2 1987.125 348.70 348.70 348.01 28
1987 3 1987.208 349.72 349.72 348.31 27
1987 4 1987.292 351.32 351.32 348.77 30
1987 5 1987.375 352.14 352.14 349.03 31
1987 6 1987.458 351.61 351.61 349.23 29
1987 7 1987.542 349.91 349.91 349.20 28
1987 8 1987.625 347.84 347.84 349.34 27
1987 9 1987.708 346.52 346.52 349.71 29
1987 10 1987.792 346.65 346.65 349.88 30
1987 11 1987.875 347.96 347.96 350.07 27
1987 12 1987.958 349.18 349.18 350.07 30
1988 1 1988.042 350.38 350.38 350.36 29
1988 2 1988.125 351.68 351.68 351.01 27
1988 3 1988.208 352.24 352.24 350.76 30
1988 4 1988.292 353.66 353.66 351.00 30
1988 5 1988.375 354.18 354.18 350.99 31
1988 6 1988.458 353.68 353.68 351.30 29
1988 7 1988.542 352.58 352.58 351.94 30
1988 8 1988.625 350.65 350.65 352.19 27
1988 9 1988.708 349.03 349.03 352.22 29
1988 10 1988.792 349.08 349.08 352.34 31
1988 11 1988.875 350.15 350.15 352.29 27
1988 12 1988.958 351.44 351.44 352.36 30
1989 1 1989.042 352.89 352.89 352.83 31
1989 2 1989.125 353.24 353.24 352.55 28
1989 3 1989.208 353.80 353.80 352.36 30
1989 4 1989.292 355.59 355.59 352.93 30
1989 5 1989.375 355.89 355.89 352.65 31
1989 6 1989.458 355.30 355.30 352.88 30
1989 7 1989.542 353.98 353.98 353.33 31
1989 8 1989.625 351.53 351.53 353.11 29
1989 9 1989.708 350.02 350.02 353.27 28
1989 10 1989.792 350.29 350.29 353.53 30
1989 11 1989.875 351.44 351.44 353.60 30
1989 12 1989.958 352.84 352.84 353.78 28
1990 1 1990.042 353.79 353.79 353.74 30
1990 2 1990.125 354.88 354.88 354.20 28
1990 3 1990.208 355.65 355.65 354.21 31
1990 4 1990.292 356.28 356.28 353.66 29
1990 5 1990.375 357.29 357.29 354.10 30
1990 6 1990.458 356.32 356.32 353.92 30
1990 7 1990.542 354.88 354.88 354.27 29
1990 8 1990.625 352.89 352.89 354.51 30
1990 9 1990.708 351.28 351.28 354.53 27
1990 10 1990.792 351.59 351.59 354.81 31
1990 11 1990.875 353.05 353.05 355.10 29
1990 12 1990.958 354.27 354.27 355.12 30
1991 1 1991.042 354.87 354.87 354.85 29
1991 2 1991.125 355.68 355.68 355.01 28
1991 3 1991.208 357.06 357.06 355.57 27
1991 4 1991.292 358.51 358.51 355.88 30
1991 5 1991.375 359.09 359.09 355.94 31
1991 6 1991.458 358.10 358.10 355.75 30
1991 7 1991.542 356.12 356.12 355.51 29
1991 8 1991.625 353.89 353.89 355.50 31
1991 9 1991.708 352.30 352.30 355.58 30
1991 10 1991.792 352.32 352.32 355.55 31
1991 11 1991.875 353.79 353.79 355.78 30
1991 12 1991.958 355.07 355.07 355.89 31
1992 1 1992.042 356.17 356.17 356.12 30
1992 2 1992.125 356.93 356.93 356.23 29
1992 3 1992.208 357.82 357.82 356.28 29
1992 4 1992.292 359.00 359.00 356.30 30
1992 5 1992.375 359.55 359.55 356.33 31
1992 6 1992.458 359.32 359.32 356.92 30
1992 7 1992.542 356.85 356.85 356.27 30
1992 8 1992.625 354.91 354.91 356.61 30
1992 9 1992.708 352.93 352.93 356.27 29
1992 10 1992.792 353.31 353.31 356.57 30
1992 11 1992.875 354.27 354.27 356.32 30
1992 12 1992.958 355.53 355.53 356.37 31
1993 1 1993.042 356.86 356.86 356.84 28
1993 2 1993.125 357.27 357.27 356.43 28
1993 3 1993.208 358.36 358.36 356.70 31
1993 4 1993.292 359.27 359.27 356.60 30
1993 5 1993.375 360.19 360.19 357.00 31
1993 6 1993.458 359.52 359.52 357.09 30
1993 7 1993.542 357.42 357.42 356.83 27
1993 8 1993.625 355.46 355.46 357.14 28
1993 9 1993.708 354.10 354.10 357.45 26
1993 10 1993.792 354.12 354.12 357.46 30
1993 11 1993.875 355.40 355.40 357.53 30
1993 12 1993.958 356.84 356.84 357.76 31
1994 1 1994.042 358.22 358.22 358.13 27
1994 2 1994.125 358.98 358.98 358.15 27
1994 3 1994.208 359.91 359.91 358.25 30
1994 4 1994.292 361.32 361.32 358.57 30
1994 5 1994.375 361.68 361.68 358.44 30
1994 6 1994.458 360.80 360.80 358.39 30
1994 7 1994.542 359.39 359.39 358.79 31
1994 8 1994.625 357.42 357.42 359.12 31
1994 9 1994.708 355.63 355.63 359.05 30
1994 10 1994.792 356.09 356.09 359.50 31
1994 11 1994.875 357.56 357.56 359.72 30
1994 12 1994.958 358.87 358.87 359.75 31
1995 1 1995.042 359.87 359.87 359.76 31
1995 2 1995.125 360.79 360.79 359.98 28
1995 3 1995.208 361.77 361.77 360.19 30
1995 4 1995.292 363.23 363.23 360.56 30
1995 5 1995.375 363.77 363.77 360.61 29
1995 6 1995.458 363.22 363.22 360.82 30
1995 7 1995.542 361.70 361.70 361.03 31
1995 8 1995.625 359.11 359.11 360.74 30
1995 9 1995.708 358.11 358.11 361.48 30
1995 10 1995.792 357.97 357.97 361.34 31
1995 11 1995.875 359.40 359.40 361.54 30
1995 12 1995.958 360.61 360.61 361.49 30
1996 1 1996.042 362.04 362.04 361.84 31
1996 2 1996.125 363.17 363.17 362.29 29
1996 3 1996.208 364.17 364.17 362.55 31
1996 4 1996.292 364.51 364.51 361.81 29
1996 5 1996.375 365.16 365.16 362.10 31
1996 6 1996.458 364.93 364.93 362.64 30
1996 7 1996.542 363.53 363.53 362.83 31
1996 8 1996.625 361.38 361.38 362.99 30
1996 9 1996.708 359.60 359.60 363.03 28
1996 10 1996.792 359.54 359.54 362.91 31
1996 11 1996.875 360.84 360.84 362.99 30
1996 12 1996.958 362.18 362.18 363.05 31
1997 1 1997.042 363.04 363.04 362.85 31
1997 2 1997.125 364.09 364.09 363.28 28
1997 3 1997.208 364.47 364.47 362.86 31
1997 4 1997.292 366.25 366.25 363.59 29
1997 5 1997.375 366.69 366.69 363.76 30
1997 6 1997.458 365.59 365.59 363.39 28
1997 7 1997.542 364.34 364.34 363.63 26
1997 8 1997.625 362.20 362.20 363.78 27
1997 9 1997.708 360.31 360.31 363.69 29
1997 10 1997.792 360.71 360.71 364.01 31
1997 11 1997.875 362.45 362.45 364.51 29
1997 12 1997.958 364.33 364.33 365.12 31
1998 1 1998.042 365.18 365.18 365.01 30
1998 2 1998.125 365.98 365.98 365.18 27
1998 3 1998.208 367.13 367.13 365.50 31
1998 4 1998.292 368.61 368.61 366.00 30
1998 5 1998.375 369.49 369.49 366.60 30
1998 6 1998.458 368.95 368.95 366.73 30
1998 7 1998.542 367.74 367.74 367.05 30
1998 8 1998.625 365.79 365.79 367.37 31
1998 9 1998.708 364.01 364.01 367.34 29
1998 10 1998.792 364.35 364.35 367.63 31
1998 11 1998.875 365.52 365.52 367.58 23
1998 12 1998.958 367.08 367.08 367.85 26
1999 1 1999.042 368.12 368.12 367.92 27
1999 2 1999.125 368.98 368.98 368.18 23
1999 3 1999.208 369.60 369.60 368.00 25
1999 4 1999.292 370.96 370.96 368.44 30
1999 5 1999.375 370.77 370.77 367.95 30
1999 6 1999.458 370.33 370.33 368.14 30
1999 7 1999.542 369.28 369.28 368.60 30
1999 8 1999.625 366.86 366.86 368.42 30
1999 9 1999.708 364.94 364.94 368.24 28
1999 10 1999.792 365.35 365.35 368.62 31
1999 11 1999.875 366.68 366.68 368.68 29
1999 12 1999.958 368.04 368.04 368.72 29
2000 1 2000.042 369.25 369.25 369.06 27
2000 2 2000.125 369.50 369.50 368.79 23
2000 3 2000.208 370.56 370.56 369.04 31
2000 4 2000.292 371.82 371.82 369.29 29
2000 5 2000.375 371.51 371.51 368.64 29
2000 6 2000.458 371.71 371.71 369.49 29
2000 7 2000.542 369.84 369.84 369.18 28
2000 8 2000.625 368.20 368.20 369.78 28
2000 9 2000.708 366.91 366.91 370.19 30
2000 10 2000.792 366.99 366.99 370.22 31
2000 11 2000.875 368.33 368.33 370.29 25
2000 12 2000.958 369.67 369.67 370.31 30
2001 1 2001.042 370.52 370.52 370.36 29
2001 2 2001.125 371.49 371.49 370.77 28
2001 3 2001.208 372.53 372.53 370.97 29
2001 4 2001.292 373.37 373.37 370.79 30
2001 5 2001.375 373.82 373.82 370.92 25
2001 6 2001.458 373.18 373.18 370.97 28
2001 7 2001.542 371.57 371.57 370.94 30
2001 8 2001.625 369.63 369.63 371.21 30
2001 9 2001.708 368.16 368.16 371.41 30
2001 10 2001.792 368.42 368.42 371.65 31
2001 11 2001.875 369.69 369.69 371.70 27
2001 12 2001.958 371.18 371.18 371.89 31
2002 1 2002.042 372.45 372.45 372.23 29
2002 2 2002.125 373.14 373.14 372.26 27
2002 3 2002.208 373.94 373.94 372.22 27
2002 4 2002.292 375.00 375.00 372.33 30
2002 5 2002.375 375.65 375.65 372.74 31
2002 6 2002.458 375.50 375.50 373.29 30
2002 7 2002.542 374.00 374.00 373.36 31
2002 8 2002.625 371.83 371.83 373.47 31
2002 9 2002.708 370.66 370.66 374.01 29
2002 10 2002.792 370.51 370.51 373.84 31
2002 11 2002.875 372.20 372.20 374.33 30
2002 12 2002.958 373.71 373.71 374.50 30
2003 1 2003.042 374.87 374.87 374.63 31
2003 2 2003.125 375.62 375.62 374.75 27
2003 3 2003.208 376.48 376.48 374.79 31
2003 4 2003.292 377.74 377.74 375.02 27
2003 5 2003.375 378.50 378.50 375.47 31
2003 6 2003.458 378.18 378.18 375.95 29
2003 7 2003.542 376.72 376.72 376.16 28
2003 8 2003.625 374.31 374.31 375.98 26
2003 9 2003.708 373.20 373.20 376.51 28
2003 10 2003.792 373.10 373.10 376.45 30
2003 11 2003.875 374.64 374.64 376.83 25
2003 12 2003.958 375.93 375.93 376.74 30
2004 1 2004.042 377.00 377.00 376.79 31
2004 2 2004.125 377.87 377.87 377.01 27
2004 3 2004.208 378.73 378.73 377.06 30
2004 4 2004.292 380.41 380.41 377.65 29
2004 5 2004.375 380.63 380.63 377.51 28
2004 6 2004.458 379.56 379.56 377.28 26
2004 7 2004.542 377.61 377.61 377.03 28
2004 8 2004.625 376.15 376.15 377.85 19
2004 9 2004.708 374.11 374.11 377.49 16
2004 10 2004.792 374.44 374.44 377.80 31
2004 11 2004.875 375.93 375.93 378.13 27
2004 12 2004.958 377.45 377.45 378.30 31
2005 1 2005.042 378.47 378.47 378.21 31
2005 2 2005.125 379.76 379.76 378.95 27
2005 3 2005.208 381.14 381.14 379.63 27
2005 4 2005.292 382.20 382.20 379.54 30
2005 5 2005.375 382.47 382.47 379.33 31
2005 6 2005.458 382.20 382.20 379.87 30
2005 7 2005.542 380.78 380.78 380.17 30
2005 8 2005.625 378.73 378.73 380.38 30
2005 9 2005.708 376.66 376.66 379.98 30
2005 10 2005.792 376.98 376.98 380.29 14
2005 11 2005.875 378.29 378.29 380.47 24
2005 12 2005.958 379.92 379.92 380.75 29
2006 1 2006.042 381.35 381.35 381.11 26
2006 2 2006.125 382.16 382.16 381.34 25
2006 3 2006.208 382.66 382.66 381.11 30
2006 4 2006.292 384.73 384.73 382.02 27
2006 5 2006.375 384.98 384.98 381.82 29
2006 6 2006.458 384.09 384.09 381.79 29
2006 7 2006.542 382.38 382.38 381.82 27
2006 8 2006.625 380.45 380.45 382.10 28
2006 9 2006.708 378.92 378.92 382.22 29
2006 10 2006.792 379.16 379.16 382.48 25
2006 11 2006.875 380.18 380.18 382.38 30
2006 12 2006.958 381.79 381.79 382.65 31
2007 1 2007.042 382.93 382.93 382.74 23
2007 2 2007.125 383.81 383.81 382.95 21
2007 3 2007.208 384.56 384.56 382.92 31
2007 4 2007.292 386.40 386.40 383.58 28
2007 5 2007.375 386.58 386.58 383.34 31
2007 6 2007.458 386.05 386.05 383.77 30
2007 7 2007.542 384.49 384.49 383.99 31
2007 8 2007.625 382.00 382.00 383.69 30
2007 9 2007.708 380.90 380.90 384.25 25
2007 10 2007.792 381.14 381.14 384.48 30
2007 11 2007.875 382.42 382.42 384.64 30
2007 12 2007.958 383.89 383.89 384.81 28
2008 1 2008.042 385.44 385.44 385.26 31
2008 2 2008.125 385.73 385.73 384.91 28
2008 3 2008.208 385.97 385.97 384.40 30
2008 4 2008.292 387.16 387.16 384.50 28
2008 5 2008.375 388.50 388.50 385.38 26
2008 6 2008.458 387.88 387.88 385.55 24
2008 7 2008.542 386.43 386.43 385.87 10
2008 8 2008.625 384.15 384.15 385.82 28
2008 9 2008.708 383.09 383.09 386.34 30
2008 10 2008.792 382.99 382.99 386.26 24
2008 11 2008.875 384.13 384.13 386.32 29
2008 12 2008.958 385.56 385.56 386.43 30
2009 1 2009.042 386.94 386.94 386.66 31
2009 2 2009.125 387.42 387.42 386.61 28
2009 3 2009.208 388.77 388.77 387.30 30
2009 4 2009.292 389.44 389.44 386.78 28
2009 5 2009.375 390.19 390.19 387.02 31
2009 6 2009.458 389.45 389.45 387.17 29
2009 7 2009.542 387.78 387.78 387.31 30
2009 8 2009.625 385.92 385.92 387.62 30
2009 9 2009.708 384.79 384.79 388.03 27
2009 10 2009.792 384.39 384.39 387.63 31
2009 11 2009.875 386.00 386.00 388.16 30
2009 12 2009.958 387.31 387.31 388.13 21
2010 1 2010.042 388.50 388.50 388.23 28
2010 2 2010.125 389.94 389.94 389.06 25
2010 3 2010.208 391.09 391.09 389.60 28
2010 4 2010.292 392.52 392.52 389.94 28
2010 5 2010.375 393.04 393.04 389.86 30
2010 6 2010.458 392.15 392.15 389.84 29
2010 7 2010.542 390.22 390.22 389.75 31
2010 8 2010.625 388.26 388.26 389.94 31
2010 9 2010.708 386.83 386.83 390.09 30
2010 10 2010.792 387.20 387.20 390.49 31
2010 11 2010.875 388.65 388.65 390.79 30
2010 12 2010.958 389.73 389.73 390.54 31
2011 1 2011.042 391.25 391.25 390.98 29
2011 2 2011.125 391.82 391.82 390.96 28
2011 3 2011.208 392.49 392.49 390.99 30
2011 4 2011.292 393.34 393.34 390.69 28
2011 5 2011.375 394.21 394.21 390.97 31
2011 6 2011.458 393.72 393.72 391.38 28
2011 7 2011.542 392.42 392.42 391.96 31
2011 8 2011.625 390.19 390.19 391.88 29
2011 9 2011.708 389.04 389.04 392.34 28
2011 10 2011.792 388.96 388.96 392.30 31
2011 11 2011.875 390.24 390.24 392.41 29
2011 12 2011.958 391.83 391.83 392.64 30
2012 1 2012.042 393.12 393.12 392.91 30
2012 2 2012.125 393.60 393.60 392.83 27
2012 3 2012.208 394.45 394.45 392.88 31
2012 4 2012.292 396.18 396.18 393.40 30
2012 5 2012.375 396.78 396.78 393.51 31
2012 6 2012.458 395.82 395.82 393.53 28
2012 7 2012.542 394.30 394.30 393.89 29
2012 8 2012.625 392.41 392.41 394.19 31
2012 9 2012.708 391.06 391.06 394.45 29
2012 10 2012.792 391.01 391.01 394.38 30
2012 11 2012.875 392.81 392.81 394.87 29
2012 12 2012.958 394.28 394.28 394.98 30
2013 1 2013.042 395.54 395.54 395.38 31
2013 2 2013.125 396.80 396.80 396.04 28
2013 3 2013.208 397.31 397.31 395.71 30
2013 4 2013.292 398.35 398.35 395.47 26
2013 5 2013.375 399.76 399.76 396.37 31
2013 6 2013.458 398.58 398.58 396.24 27
2013 7 2013.542 397.20 397.20 396.82 28
2013 8 2013.625 395.15 395.15 396.96 31
2013 9 2013.708 393.51 393.51 396.91 28
2013 10 2013.792 393.66 393.66 397.04 30
2013 11 2013.875 395.11 395.11 397.24 30
2013 12 2013.958 396.81 396.81 397.60 31
2014 1 2014.042 397.81 397.81 397.65 31
2014 2 2014.125 397.93 397.93 397.16 27
2014 3 2014.208 399.62 399.62 398.02 28
2014 4 2014.292 401.34 401.34 398.46 30
2014 5 2014.375 401.88 401.88 398.49 25
2014 6 2014.458 401.20 401.20 398.86 30
2014 7 2014.542 399.04 399.04 398.66 31
2014 8 2014.625 397.10 397.10 398.92 25
2014 9 2014.708 395.35 395.35 398.75 28
2014 10 2014.792 395.95 395.95 399.33 26
2014 11 2014.875 397.27 397.27 399.41 29
2014 12 2014.958 398.85 398.85 399.64 30
2015 1 2015.042 399.98 399.98 399.82 30
2015 2 2015.125 400.28 400.28 399.52 27
2015 3 2015.208 401.54 401.54 399.94 24
2015 4 2015.292 403.28 403.28 400.40 27
2015 5 2015.375 403.96 403.96 400.57 30
2015 6 2015.458 402.80 402.80 400.46 28
2015 7 2015.542 401.31 401.31 400.93 23
2015 8 2015.625 398.93 398.93 400.74 28
2015 9 2015.708 397.63 397.63 401.03 25
2015 10 2015.792 398.29 398.29 401.66 28
2015 11 2015.875 400.16 400.16 402.29 27
2015 12 2015.958 401.85 401.85 402.65 30
2016 1 2016.042 402.52 402.52 402.36 27
2016 2 2016.125 404.04 404.04 403.27 26
2016 3 2016.208 404.83 404.83 403.23 29
2016 4 2016.292 407.42 407.42 404.54 25
2016 5 2016.375 407.70 407.70 404.31 29
2016 6 2016.458 406.81 406.81 404.47 26
2016 7 2016.542 404.39 404.39 404.01 28
2016 8 2016.625 402.25 402.25 404.07 23
####################
## Copy of the data flat file "law_co2.txt" (not really CSV-like)
##########
Law Dome Atmospheric CO2 Data: Readme file
---------------------------------------------------------------------
World Data Center for Paleoclimatology, Boulder
and
NOAA Paleoclimatology Program
---------------------------------------------------------------------
NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!!
NAME OF DATA SET: Law Dome Atmospheric CO2 Data
LAST UPDATE: 12/2001 (Original receipt by WDC Paleo)
CONTRIBUTORS: D.M. Etheridge, L.P. Steele, R.L. Langenfelds and R.J. Francey
Division of Atmospheric Research, CSIRO, Aspendale, Victoria, Australia.
J.-M. Barnola
Laboratoire de Glaciologie et Géophysique de l'Environnement,
Saint Martin d'Hères-Cedex, France
V.I. Morgan
Antarctic CRC and Australian Antarctic Division, Hobart, Tasmania, Australia
IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2001-083
SUGGESTED DATA CITATION: Etheridge, D.M., et al., 2001,
Law Dome Atmospheric CO2 Data,
IGBP PAGES/World Data Center for Paleoclimatology
Data Contribution Series #2001-083.
NOAA/NGDC Paleoclimatology Program, Boulder CO, USA.
ORIGINAL REFERENCE: Etheridge, D.M., L.P. Steele,
R.L. Langenfelds, R.J. Francey, J.-M. Barnola, and V.I. Morgan. 1996.
Natural and anthropogenic changes in atmospheric CO2 over the
last 1000 years from air in Antarctic ice and firn.
Journal of Geophysical Research 101:4115-4128.
ADDITIONAL REFERENCES:
Etheridge, D.M., and C.W. Wookey. 1989.
Ice core drilling at a high accumulation area of Law Dome, Antarctica.
In Ice Core Drilling, edited by C. Rado and D. Beaudoing, pp. 86-96.
Proceedings of the Third International Workshop on Ice Core Drilling
Technology, Grenoble, France, October 10-14, 1988, CNRS, Grenoble.
Etheridge, D.M., G.I. Pearman, and F. de Silva. 1988.
Atmospheric trace-gas variations as revealed by air trapped in an ice core
from Law Dome, Antarctica. Ann. Glaciol. 10:28-33.
Etheridge, D.M., G.I. Pearman, and P.J. Fraser. 1992.
Changes in tropospheric methane between 1841 and 1978 from a high accumulation
rate Antarctic ice core. Tellus 44B:282-294.
Hamley, T.C., V.I. Morgan, R.J. Thwaites, and X.Q. Gao. 1986.
An ice-core drilling site at Law Dome summit, Wilkes Land, Antarctica,
Res. Note 37, Aust. Natl. Antarc. Res. Exped., Tasmania.
Morgan, V.I., C.W. Wookey, J. Li, T.D. van Ommen, W. Skinner, and M.F.
Fitzpatrick. 1997.
Site information and initial results from deep ice drilling on Law Dome.
J. Glaciol. 43:3-10.
Levchenko, V. A., Francey, R. J., Etheridge, D. M., Tuniz, C., Head, J.,
Morgan, V. I., and Jacobsen, G., 1996. The 14C "bomb spike" determines the
age spread and age of CO2 in Law Dome firm and ice. Geophysical Research
Letters, 23 (23): 3345-3348.
Trudinger, C. M., Enting, I. G., Etheridge, D. M., Francey, R. J.,
Levchenko, V. A., Steele, L. P., Raynaud, D., and Arnaud, L., 1997.
Modeling air movement and bubble trapping in firn. Journal of Geophysical
Research, 102 (D6): 6747-6763.
Trudinger, C. M., Enting, I. G., Francey, R. J., Etheridge, D. M., and
Rayner, P. J. (1999). Long-term variability in the global carbon cycle
inferred from a high precision CO2 and d13C ice core record .
Tellus, 51 (2): 233-248.
Langenfelds, R.L., P.J. Fraser, R.J. Francey, L.P. Steele, L.W. Porter,
and C.E. Allison, The Cape Grim Air Archive: The first seventeen years,
1978-1995, in Baseline Atmospheric Program Australia, 1994-95, edited by
R.J. Francey, et al., pp. 53-70, Bur. of Meteorol. and CSIRO Div. of Atmos.
Res., Melbourne, Victoria, 1996.
GEOGRAPHIC REGION: Antarctica
PERIOD OF RECORD: 1006 A.D. to 1978 A.D.
LIST OF FILES: Readme_law_co2.txt (this file),
law_co2.txt(Tab-delimited ASCII text).
DESCRIPTION:
Ice Core CO2 records from the Law Dome DE08, DE08-2, and DSS ice cores.
Law Dome, Antarctica 66°44' S, 112°50' E, 1390 mean annual sea level (M.A.S.L.)
The CO2 records presented here are derived from three ice cores obtained at
Law Dome, East Antarctica from 1987 to 1993. The Law Dome site satisfies many
of the desirable characteristics of an ideal ice core site for atmospheric CO2
reconstructions including negligible melting of the ice sheet surface, low
concentrations of impurities, regular stratigraphic layering undisturbed at
the surface by wind or at depth by ice flow, and high snow accumulation rate.
Further details on the site, drilling, and cores are provided in Etheridge et
al. (1996), Etheridge and Wookey (1989), and Morgan et al (1997).
The air enclosed in the three ice cores from Law Dome, Antarctica has unparalled
age resolution and extends into recent decades, because of the high rate of snow
accumulation at the Law Dome drill sites (Etheridge et al. 1996). Etheridge et al.
(1996) reported the uncertainty of the ice core CO2 mixing ratios is 1.2 ppm.
Preindustrial CO2 mixing ratios were in the range 275-284 ppm, with the lower
levels during 1550-1800 A.D., probably as a result of colder global climate
(Etheridge et al. 1996). The Law Dome ice core CO2 records show major growth
in atmospheric CO2 levels over the industrial period, except during 1935-1945
A.D. when levels stabilized or decreased slightly.
Methods
Air bubbles were extracted using the "cheese grater" technique. Ice core
samples weighing 500-1500 g were prepared by selecting crack-free ice and
trimming away the outer 5-20 mm. Each sample was sealed in a polyethylene bag
and cooled to -80°C before being placed in the extraction flask where it was
evacuated and then ground to fine chips. The released air was dried
cryogenically at -100°C and collected cryogenically in electropolished
stainless steel "traps", cooled to about -255°C. Further details on the
extraction technique can be found in Etheridge et al. (1988 and 1992) and
additional information on the ice and air sample handling are provided in
Etheridge et al. (1996).
The ice core air samples, ranging from about 50 to 150 ml standard temperature
and pressure (STP), were measured for CO2 mixing ratio with a Carle 400 Series
analytical gas chromatograph (GC). After separation on the GC columns, the CO2
was catalytically converted to methane before flame ionization detection. As
many as three separate analysis were made on each ice core sample. Each sample
injection to the GC was bracketed by calibration gas injections. CO2 mixing
ratios were then found for each aliquot by multiplying the ratio of the sample
peak area to calibration gas peak area (interpolated to the time of sample
analysis) by the CO2 mixing ratio assigned to the calibration gas. The
precision of analysis of the Law Dome ice core air samples was 0.2 ppm. For
greater details on the experimental techniques used on the DE08, DE08-2, and
DSS ice cores, please refer to Etheridge et al. (1996).
The ice cores were dated by counting the annual layers in oxygen isotope ratio
(18O in H2O), ice electroconductivity measurements (ECM), and hydrogen
peroxide (H2O2) concentrations. For these three parameters, each core
displayed clear, well-preserved seasonal cycles allowing a dating accuracy of
±2 years at 1805 A.D. for the three cores and ±10 years at 1350 A.D. for DSS.
The enclosed air at any depth in the ice has a mean age, (aa), that is younger
than the age of the host ice layer (ai), from which the air is extracted. The
difference (a) equals the time (Ts) for the ice layer to reach a depth (ds),
where air becomes sealed in the pore space, minus the mean time (Td) for air
to mix down the depth. The mean air age is thus
aa = ai + a = ai + Ts - Td
where ages are dates A.D.
Mixing of air from the ice sheet surface to the sealing depth is primarily by
molecular diffusion. The rate of air mixing by diffusion in the firn decreases
as the density increases and the open porosity decreases with depth. Etheridge
et al. (1996) determined the sealing density at DE08 to be 72 m where the age
of the ice is 40±1 years; at DE08-2 to be 72 m depth and 40 years; and at DSS
to be 66 m depth and 68 years. For more details on dating the Law Dome ice
cores and sealing densities, please refer to Etheridge et al. (1996).
Historical CO2 record from the Law Dome DE08, DE08-2, and DSS ice cores
D.M. Etheridge
L.P. Steele
R.L. Langenfelds
R.J. Francey
Division of Atmospheric Research, CSIRO, Aspendale, Victoria, Australia
J.-M. Barnola
Laboratoire of Glaciologie et Geophysique de l'Environnement, Saint Martin d'Heres-Cedex, France
V.I. Morgan
Antarctic CRC and Australian Antarctic Division, Hobart, Tasmania, Australia
Ice Sample Analysis Mean Ice Depth, Ice Age, Mean Air Age, CO2 Mixing Ratio,
Code Date m year A.D. year A.D. ppm
DE08 205 20-Aug-92 83.10 1939 1969 323.2
DE08 235 12-Aug-93 83.98 1938 1968 323.7
DE08 225 2-Aug-93 89.15 1935 1965 319.5
DE08 226 2-Aug-93 89.00 1935 1965 318.8
DE08 203 5-Aug-92 91.95 1933 1963 318.2
DE08 212 14-Jul-93 93.00 1932 1962 318.7
DE08 213 14-Jul-93 93.15 1932 1962 317.0
DE08 214 15-Jul-93 92.68 1932 1962 319.4
DE08 215 15-Jul-93 92.84 1932 1962 317.0
DE08 201 27-Jul-92 104.44 1923 1953 311.9
DE08 208 13-Nov-92 104.61 1923 1953 311.0
DE08 236 12-Aug-93 104.29 1923 1953 312.7
DE08 227 2-Aug-93 115.66 1914 1944 309.7
DE08 243 8-Oct-93 121.80 1909 1939 311.0
DE08 240 19-Aug-93 121.90 1908 1938 310.5
DE08 238 13-Aug-93 130.27 1902 1932 307.8
DE08 231 10-Aug-93 138.79 1894 1924 304.8
DE08 237 13-Aug-93 138.79 1894 1924 304.1
DE08 233 11-Aug-93 149.86 1885 1915 301.3
DE08 239 17-Aug-93 153.00 1882 1912 300.7
DE08 253 19-Jul-95 160.70 1875 1905 296.9
DE08 254 3-Aug-95 160.90 1875 1905 298.5
DE08 230 10-Aug-93 167.86 1868 1898 294.7
DE08 241 19-Aug-93 174.39 1862 1892 294.6
DE08 252 19-Jul-95 179.50 1856 1886 293.7
DE08 229 10-Aug-93 184.31 1852 1882 291.9
DE08 255 3-Aug-95 190.30 1847 1877 288.8
DE08 228 6-Aug-93 197.54 1839 1869 287.4
DE08 232 11-Aug-93 206.09 1831 1861 286.6
DE08 234 12-Aug-93 214.10 1824 1854 284.9
DE08 200 26-Jun-92 218.02 1820 1850 285.2
DE08 222 29-Jul-93 228.74 1810 1840 283.0
Ice Sample Analysis Mean Ice Depth, Ice Age, Mean Air Age, CO2 Mixing Ratio
Code Date m year A.D. year A.D. ppm
DE08-2 008 9-Dec-93 81.11 1948 1978 335.2
DE08-2 012 15-Dec-93 81.30 1948 1978 332.0
DE08-2 003 17-Aug-93 85.05 1945 1975 331.2
DE08-2 002 6-Aug-93 87.96 1943 1973 328.1
DE08-2 005 24-Aug-93 90.55 1941 1971 324.1
DE08-2 015 3-Aug-95 91.69 1940.2 1970 325.2
DE08-2 016 3-Aug-95 92.30 1939.7 1970 324.7
DE08-2 009 15-Dec-93 120.27 1918 1948 309.9
DE08-2 007 9-Dec-93 128.79 1910 1940 310.5
DE08-2 011 15-Dec-93 135.82 1904 1934 309.2
DE08-2 006 9-Dec-93 242.81 1802 1832 284.5
Ice Sample Analysis Mean Ice Depth, Ice Age, Mean Air Age, CO2 Mixing Ratio,
Code Date m year A.D. year A.D. ppm
DSS 004 13-Nov-92 78.02 1901 1959 315.7
DSS 001 20-Aug-92 81.82 1896 1954 313.6
DSS 002 21-Aug-92 81.82 1896 1954 314.7
DSS 003 21-Aug-92 81.82 1896 1954 314.1
DSS 029 24-Nov-93 86.19 1890 1948 311.4
DSS 037 7-Jun-95 92.86 1881 1939 309.2
DSS 027 18-Nov-93 94.13 1878 1936 307.9
DSS 041 15-Jun-95 99.82 1871 1929 305.2
DSS 008 13-Aug-93 100.32 1868 1926 305.0
DSS 033 2-Jun-95 114.45 1847 1905 299.0
DSS 007 11-Aug-93 116.89 1841 1899 296.5
DSS 030 24-Nov-93 122.82 1833 1891 294.7
DSS 009 20-Aug-93 151.56 1787 1845 286.1
DSS 010 20-Aug-93 163.51 1767 1825 285.1
DSS 015 8-Oct-93 179.97 1738 1796 283.7
DSS 016 14-Oct-93 181.34 1736 1794 281.6
DSS 017 14-Oct-93 190.88 1719 1777 279.5
DSS 031 2-Jun-95 200.64 1702 1760 276.7
DSS 014 23-Aug-93 206.50 1691 1749 277.2
DSS 025 10-Nov-93 207.58 1689 1747 276.9
DSS 019 21-Oct-93 223.01 1662 1720 277.5
DSS 011 20-Aug-93 238.00 1634 1692 276.5
DSS 020 21-Oct-93 245.63 1621 1679 275.9
DSS 013 23-Aug-93 263.35 1589 1647 277.2
DSS 012 23-Aug-93 285.20 1546 1604 274.3
DSS 021 28-Oct-93 293.20 1531 1589 278.7
DSS 032 2-Jun-95 302.14 1512 1570 281.9
DSS 018 21-Oct-93 313.93 1489 1547 282.8
DSS 035 7-Jun-95 323.84 1469 1527 283.2
DSS 023 10-Nov-93 336.73 1441 1499 282.4
DSS 044 30-Jun-95 351.30 1407 1465 279.6
DSS 022 28-Oct-93 360.64 1388 1446 281.7
DSS 024 10-Nov-93 387.13 1329 1387 280.0
DSS 026 18-Nov-93 387.20 1329 1387 280.4
DSS 034 5-Jun-95 414.22 1269 1327 283.4
DSS 039 14-Jun-95 447.34 1188 1246 281.7
DSS 036 9-Jun-95 467.85 1138 1196 283.9
DSS 043 30-Jun-95 488.46 1088 1146 283.8
DSS 042 15-Jun-95 506.03 1038 1096 282.4
DSS 040 14-Jun-95 523.56 988 1046 280.3
DSS 038 12-Jun-95 534.27 948 1006 279.4
Mean Air Age, CO2, 20 Year Smoothed,
year A.D. ppm
1832 284.3
1833 284.1
1834 284.0
1835 283.8
1836 283.7
1837 283.5
1838 283.4
1839 283.4
1840 283.4
1841 283.4
1842 283.5
1843 283.6
1844 283.7
1845 283.9
1846 284.1
1847 284.2
1848 284.4
1849 284.6
1850 284.7
1851 284.9
1852 285.0
1853 285.1
1854 285.3
1855 285.4
1856 285.6
1857 285.7
1858 285.9
1859 286.1
1860 286.2
1861 286.4
1862 286.5
1863 286.6
1864 286.8
1865 286.9
1866 287.0
1867 287.1
1868 287.2
1869 287.4
1870 287.5
1871 287.7
1872 287.9
1873 288.1
1874 288.4
1875 288.7
1876 289.0
1877 289.4
1878 289.8
1879 290.2
1880 290.7
1881 291.2
1882 291.7
1883 292.1
1884 292.6
1885 293.0
1886 293.3
1887 293.6
1888 293.8
1889 294.0
1890 294.2
1891 294.3
1892 294.5
1893 294.6
1894 294.7
1895 294.8
1896 294.9
1897 295.0
1898 295.2
1899 295.5
1900 295.8
1901 296.1
1902 296.5
1903 296.8
1904 297.2
1905 297.6
1906 298.1
1907 298.5
1908 298.9
1909 299.3
1910 299.7
1911 300.1
1912 300.4
1913 300.8
1914 301.1
1915 301.4
1916 301.7
1917 302.1
1918 302.4
1919 302.7
1920 303.0
1921 303.4
1922 303.8
1923 304.1
1924 304.5
1925 305.0
1926 305.4
1927 305.8
1928 306.3
1929 306.8
1930 307.2
1931 307.7
1932 308.2
1933 308.6
1934 309.0
1935 309.4
1936 309.8
1937 310.0
1938 310.2
1939 310.3
1940 310.4
1941 310.4
1942 310.3
1943 310.2
1944 310.1
1945 310.1
1946 310.1
1947 310.2
1948 310.3
1949 310.5
1950 310.7
1951 311.1
1952 311.5
1953 311.9
1954 312.4
1955 313.0
1956 313.6
1957 314.2
1958 314.9
1959 315.6
1960 316.3
1961 317.0
1962 317.7
1963 318.4
1964 319.2
1965 320.0
1966 320.8
1967 321.8
1968 322.8
1969 323.8
1970 324.8
1971 325.8
1972 326.9
1973 328.0
1974 329.2
1975 330.3
1976 331.5
1977 332.6
1978 333.7
Mean Air Age, CO2, 75 Year Smoothed,
year A.D. ppm
1010 279.5
1015 279.6
1020 279.7
1025 279.8
1030 279.9
1035 280.0
1040 280.2
1045 280.3
1050 280.5
1055 280.7
1060 280.9
1065 281.1
1070 281.3
1075 281.5
1080 281.7
1085 281.9
1090 282.1
1095 282.3
1100 282.5
1105 282.7
1110 282.9
1115 283.0
1120 283.2
1125 283.3
1130 283.5
1135 283.6
1140 283.7
1145 283.8
1150 283.9
1155 284.0
1160 284.0
1165 284.1
1170 284.1
1175 284.1
1180 284.0
1185 284.0
1190 283.9
1195 283.8
1200 283.6
1205 283.4
1210 283.2
1215 283.0
1220 282.8
1225 282.5
1230 282.3
1235 282.2
1240 282.0
1245 281.9
1250 281.9
1255 281.9
1260 282.0
1265 282.1
1270 282.2
1275 282.3
1280 282.5
1285 282.6
1290 282.8
1295 282.9
1300 283.0
1305 283.1
1310 283.2
1315 283.3
1320 283.3
1325 283.2
1330 283.1
1335 282.9
1340 282.7
1345 282.4
1350 282.1
1355 281.8
1360 281.5
1365 281.2
1370 281.0
1375 280.7
1380 280.5
1385 280.4
1390 280.3
1395 280.3
1400 280.3
1405 280.4
1410 280.5
1415 280.6
1420 280.7
1425 280.8
1430 280.9
1435 280.9
1440 280.9
1445 280.9
1450 280.8
1455 280.7
1460 280.6
1465 280.6
1470 280.6
1475 280.8
1480 281.0
1485 281.3
1490 281.6
1495 281.9
1500 282.2
1505 282.5
1510 282.7
1515 282.9
1520 283.1
1525 283.2
1530 283.2
1535 283.2
1540 283.1
1545 283.0
1550 282.8
1555 282.6
1560 282.2
1565 281.8
1570 281.2
1575 280.5
1580 279.7
1585 278.8
1590 278.0
1595 277.1
1600 276.4
1605 275.8
1610 275.5
1615 275.3
1620 275.3
1625 275.4
1630 275.6
1635 275.9
1640 276.1
1645 276.3
1650 276.4
1655 276.5
1660 276.5
1665 276.5
1670 276.4
1675 276.4
1680 276.4
1685 276.4
1690 276.5
1695 276.6
1700 276.7
1705 276.8
1710 276.9
1715 277.0
1720 277.0
1725 277.0
1730 277.0
1735 276.9
1740 276.9
1745 276.9
1750 277.0
1755 277.2
1760 277.6
1765 278.0
1770 278.6
1775 279.3
1780 280.1
1785 280.8
1790 281.6
1795 282.3
1800 282.9
1805 283.4
1810 283.8
1815 284.0
1820 284.2
1825 284.3
1830 284.4
1835 284.5
1840 284.6
1845 284.8
1850 285.2
1855 285.7
1860 286.3
1865 287.2
1870 288.2
1875 289.4
1880 290.8
1885 292.3
1890 293.7
1895 295.2
1900 296.7
1905 298.2
1910 299.9
1915 301.5
1920 303.2
1925 304.9
1930 306.5
1935 308.0
1940 309.3
1945 310.5
1950 312.0
1955 314.1
1960 316.9
1965 320.5
1970 324.7
1975 329.4
####################
## Copy of the data flat file "SN_y_tot_V2.0.txt" (CSV-like)
##########
1700.5 8.3 -1.0 -1
1701.5 18.3 -1.0 -1
1702.5 26.7 -1.0 -1
1703.5 38.3 -1.0 -1
1704.5 60.0 -1.0 -1
1705.5 96.7 -1.0 -1
1706.5 48.3 -1.0 -1
1707.5 33.3 -1.0 -1
1708.5 16.7 -1.0 -1
1709.5 13.3 -1.0 -1
1710.5 5.0 -1.0 -1
1711.5 0.0 -1.0 -1
1712.5 0.0 -1.0 -1
1713.5 3.3 -1.0 -1
1714.5 18.3 -1.0 -1
1715.5 45.0 -1.0 -1
1716.5 78.3 -1.0 -1
1717.5 105.0 -1.0 -1
1718.5 100.0 -1.0 -1
1719.5 65.0 -1.0 -1
1720.5 46.7 -1.0 -1
1721.5 43.3 -1.0 -1
1722.5 36.7 -1.0 -1
1723.5 18.3 -1.0 -1
1724.5 35.0 -1.0 -1
1725.5 66.7 -1.0 -1
1726.5 130.0 -1.0 -1
1727.5 203.3 -1.0 -1
1728.5 171.7 -1.0 -1
1729.5 121.7 -1.0 -1
1730.5 78.3 -1.0 -1
1731.5 58.3 -1.0 -1
1732.5 18.3 -1.0 -1
1733.5 8.3 -1.0 -1
1734.5 26.7 -1.0 -1
1735.5 56.7 -1.0 -1
1736.5 116.7 -1.0 -1
1737.5 135.0 -1.0 -1
1738.5 185.0 -1.0 -1
1739.5 168.3 -1.0 -1
1740.5 121.7 -1.0 -1
1741.5 66.7 -1.0 -1
1742.5 33.3 -1.0 -1
1743.5 26.7 -1.0 -1
1744.5 8.3 -1.0 -1
1745.5 18.3 -1.0 -1
1746.5 36.7 -1.0 -1
1747.5 66.7 -1.0 -1
1748.5 100.0 -1.0 -1
1749.5 134.8 -1.0 -1
1750.5 139.0 -1.0 -1
1751.5 79.5 -1.0 -1
1752.5 79.7 -1.0 -1
1753.5 51.2 -1.0 -1
1754.5 20.3 -1.0 -1
1755.5 16.0 -1.0 -1
1756.5 17.0 -1.0 -1
1757.5 54.0 -1.0 -1
1758.5 79.3 -1.0 -1
1759.5 90.0 -1.0 -1
1760.5 104.8 -1.0 -1
1761.5 143.2 -1.0 -1
1762.5 102.0 -1.0 -1
1763.5 75.2 -1.0 -1
1764.5 60.7 -1.0 -1
1765.5 34.8 -1.0 -1
1766.5 19.0 -1.0 -1
1767.5 63.0 -1.0 -1
1768.5 116.3 -1.0 -1
1769.5 176.8 -1.0 -1
1770.5 168.0 -1.0 -1
1771.5 136.0 -1.0 -1
1772.5 110.8 -1.0 -1
1773.5 58.0 -1.0 -1
1774.5 51.0 -1.0 -1
1775.5 11.7 -1.0 -1
1776.5 33.0 -1.0 -1
1777.5 154.2 -1.0 -1
1778.5 257.3 -1.0 -1
1779.5 209.8 -1.0 -1
1780.5 141.3 -1.0 -1
1781.5 113.5 -1.0 -1
1782.5 64.2 -1.0 -1
1783.5 38.0 -1.0 -1
1784.5 17.0 -1.0 -1
1785.5 40.2 -1.0 -1
1786.5 138.2 -1.0 -1
1787.5 220.0 -1.0 -1
1788.5 218.2 -1.0 -1
1789.5 196.8 -1.0 -1
1790.5 149.8 -1.0 -1
1791.5 111.0 -1.0 -1
1792.5 100.0 -1.0 -1
1793.5 78.2 -1.0 -1
1794.5 68.3 -1.0 -1
1795.5 35.5 -1.0 -1
1796.5 26.7 -1.0 -1
1797.5 10.7 -1.0 -1
1798.5 6.8 -1.0 -1
1799.5 11.3 -1.0 -1
1800.5 24.2 -1.0 -1
1801.5 56.7 -1.0 -1
1802.5 75.0 -1.0 -1
1803.5 71.8 -1.0 -1
1804.5 79.2 -1.0 -1
1805.5 70.3 -1.0 -1
1806.5 46.8 -1.0 -1
1807.5 16.8 -1.0 -1
1808.5 13.5 -1.0 -1
1809.5 4.2 -1.0 -1
1810.5 0.0 -1.0 -1
1811.5 2.3 -1.0 -1
1812.5 8.3 -1.0 -1
1813.5 20.3 -1.0 -1
1814.5 23.2 -1.0 -1
1815.5 59.0 -1.0 -1
1816.5 76.3 -1.0 -1
1817.5 68.3 -1.0 -1
1818.5 52.9 9.2 213
1819.5 38.5 7.9 249
1820.5 24.2 6.4 224
1821.5 9.2 4.2 304
1822.5 6.3 3.7 353
1823.5 2.2 2.7 302
1824.5 11.4 4.6 194
1825.5 28.2 6.8 310
1826.5 59.9 9.8 320
1827.5 83.0 11.6 321
1828.5 108.5 13.2 301
1829.5 115.2 13.6 291
1830.5 117.4 13.7 268
1831.5 80.8 11.4 285
1832.5 44.3 8.5 277
1833.5 13.4 4.9 292
1834.5 19.5 5.8 260
1835.5 85.8 11.8 173
1836.5 192.7 17.6 166
1837.5 227.3 19.1 150
1838.5 168.7 16.5 201
1839.5 143.0 15.1 194
1840.5 105.5 13.0 248
1841.5 63.3 10.1 277
1842.5 40.3 8.1 311
1843.5 18.1 5.6 320
1844.5 25.1 6.5 294
1845.5 65.8 10.3 265
1846.5 102.7 12.8 247
1847.5 166.3 16.3 232
1848.5 208.3 18.3 234
1849.5 182.5 16.6 365
1850.5 126.3 13.7 365
1851.5 122.0 13.4 365
1852.5 102.7 12.3 366
1853.5 74.1 10.4 365
1854.5 39.0 7.5 365
1855.5 12.7 4.3 365
1856.5 8.2 3.4 366
1857.5 43.4 8.0 365
1858.5 104.4 12.4 365
1859.5 178.3 16.3 365
1860.5 182.2 16.5 366
1861.5 146.6 14.8 365
1862.5 112.1 12.9 365
1863.5 83.5 11.1 365
1864.5 89.2 11.5 366
1865.5 57.8 9.2 365
1866.5 30.7 6.7 365
1867.5 13.9 4.5 365
1868.5 62.8 8.9 366
1869.5 123.6 12.5 365
1870.5 232.0 17.1 365
1871.5 185.3 15.3 365
1872.5 169.2 14.6 366
1873.5 110.1 11.8 365
1874.5 74.5 9.7 365
1875.5 28.3 6.1 365
1876.5 18.9 5.1 366
1877.5 20.7 5.3 365
1878.5 5.7 3.2 365
1879.5 10.0 3.9 365
1880.5 53.7 8.3 366
1881.5 90.5 10.7 365
1882.5 99.0 11.2 365
1883.5 106.1 11.6 365
1884.5 105.8 11.6 366
1885.5 86.3 10.5 365
1886.5 42.4 7.4 365
1887.5 21.8 5.4 365
1888.5 11.2 4.0 366
1889.5 10.4 3.9 365
1890.5 11.8 4.1 365
1891.5 59.5 8.7 365
1892.5 121.7 12.4 366
1893.5 142.0 10.6 365
1894.5 130.0 10.2 365
1895.5 106.6 9.2 365
1896.5 69.4 7.4 366
1897.5 43.8 5.9 365
1898.5 44.4 6.0 365
1899.5 20.2 4.1 365
1900.5 15.7 3.8 365
1901.5 4.6 2.6 365
1902.5 8.5 3.1 365
1903.5 40.8 5.7 365
1904.5 70.1 7.5 366
1905.5 105.5 9.2 365
1906.5 90.1 8.5 365
1907.5 102.8 9.0 365
1908.5 80.9 8.0 366
1909.5 73.2 7.6 365
1910.5 30.9 5.0 365
1911.5 9.5 3.1 365
1912.5 6.0 2.7 366
1913.5 2.4 2.3 365
1914.5 16.1 3.8 365
1915.5 79.0 7.9 365
1916.5 95.0 8.7 366
1917.5 173.6 11.8 365
1918.5 134.6 10.3 365
1919.5 105.7 9.2 365
1920.5 62.7 7.1 366
1921.5 43.5 5.9 365
1922.5 23.7 4.5 365
1923.5 9.7 3.1 365
1924.5 27.9 4.8 366
1925.5 74.0 7.7 365
1926.5 106.5 9.2 365
1927.5 114.7 9.5 365
1928.5 129.7 10.2 366
1929.5 108.2 9.3 365
1930.5 59.4 6.9 365
1931.5 35.1 5.3 365
1932.5 18.6 4.0 366
1933.5 9.2 3.2 365
1934.5 14.6 3.6 365
1935.5 60.2 6.9 365
1936.5 132.8 10.3 366
1937.5 190.6 12.3 365
1938.5 182.6 12.1 365
1939.5 148.0 10.8 365
1940.5 113.0 9.5 366
1941.5 79.2 7.9 365
1942.5 50.8 6.4 365
1943.5 27.1 4.7 365
1944.5 16.1 3.8 366
1945.5 55.3 6.6 365
1946.5 154.3 11.1 365
1947.5 214.7 9.8 365
1948.5 193.0 9.3 366
1949.5 190.7 9.2 365
1950.5 118.9 7.3 365
1951.5 98.3 6.6 365
1952.5 45.0 4.5 366
1953.5 20.1 3.0 365
1954.5 6.6 1.7 365
1955.5 54.2 4.9 365
1956.5 200.7 9.5 366
1957.5 269.3 11.0 365
1958.5 261.7 10.8 365
1959.5 225.1 10.0 365
1960.5 159.0 8.4 366
1961.5 76.4 5.8 365
1962.5 53.4 4.9 365
1963.5 39.9 4.2 365
1964.5 15.0 2.6 366
1965.5 22.0 3.2 365
1966.5 66.8 5.4 365
1967.5 132.9 7.7 365
1968.5 150.0 8.2 366
1969.5 149.4 8.2 365
1970.5 148.0 8.1 365
1971.5 94.4 6.5 365
1972.5 97.6 6.6 366
1973.5 54.1 4.9 365
1974.5 49.2 4.7 365
1975.5 22.5 3.2 365
1976.5 18.4 2.9 366
1977.5 39.3 4.2 365
1978.5 131.0 7.6 365
1979.5 220.1 9.9 365
1980.5 218.9 9.9 366
1981.5 198.9 13.1 3049
1982.5 162.4 12.1 3436
1983.5 91.0 7.6 4216
1984.5 60.5 5.9 5103
1985.5 20.6 3.7 5543
1986.5 14.8 3.5 5934
1987.5 33.9 3.7 6396
1988.5 123.0 8.4 6556
1989.5 211.1 12.8 6932
1990.5 191.8 11.2 7108
1991.5 203.3 12.7 6932
1992.5 133.0 8.9 7845
1993.5 76.1 5.8 8010
1994.5 44.9 4.4 8524
1995.5 25.1 3.7 8429
1996.5 11.6 3.1 7614
1997.5 28.9 3.6 7294
1998.5 88.3 6.6 6353
1999.5 136.3 9.3 6413
2000.5 173.9 10.1 5953
2001.5 170.4 10.5 6558
2002.5 163.6 9.8 6588
2003.5 99.3 7.1 7087
2004.5 65.3 5.9 6882
2005.5 45.8 4.7 7084
2006.5 24.7 3.5 6370
2007.5 12.6 2.7 6841
2008.5 4.2 2.5 6644
2009.5 4.8 2.5 6465
2010.5 24.9 3.4 6328
2011.5 80.8 6.7 6077
2012.5 84.5 6.7 5753
2013.5 94.0 6.9 5347
2014.5 113.3 8.0 5273
2015.5 69.8 6.4 8903
####################
## Code for the figure
##########
# -*- coding: utf-8 -*-
from decimal import Decimal
import numpy as np
import matplotlib.pylab as plt
from matplotlib.ticker import MultipleLocator, NullFormatter
from matplotlib.lines import Line2D # for legend proxy artists
from matplotlib import rcParams as rc # to globally adjust label fontsize
rc['axes.labelsize'] = 14
rc['axes.titlesize'] = 18
def smooth(signal, window_size):
extended_signal = np.hstack((signal[window_size:0:-1], signal, signal[-1:-window_size:-1]))
s = np.asarray(extended_signal)
w = np.hamming(window_size)
y = np.convolve(w/w.sum(), s, mode="same")
return y[window_size:-window_size+1]
"""
Load and prepare data
"""
# Remark: default delimiter of np.loadtxt is any whitespace.
# Data from: http://woodfortrees.org/data/hadcrut4gl
# NB: beware that last line is (simply) "e".
temp_data = np.loadtxt("hadcrut4gl.txt", comments=['#', 'e'])
temp_years = np.array([Decimal(x) for x in temp_data[:, 0]])
temps = np.asarray(temp_data[:, 1], dtype=float)
# Data from: ftp://aftp.cmdl.noaa.gov/products/trends/co2/co2_mm_mlo.txt
co2_data = np.loadtxt("co2_mm_mlo.txt", comments='#')
co2_years = co2_data[:, 2]
co2concs = co2_data[:, 4] # NB: missing measurements are already interpolated
# Data from: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law_co2.txt
lawco2_file = open("law_co2.txt")
data_rows = [x.split() for x in lawco2_file if x.startswith(" 1")]
del data_rows[[float(x[0]) for x in data_rows].index(1010.):]
data_rows = np.array(data_rows, dtype=float) # Should end up with a 2D-array
lawco2_years = data_rows[:, 0]
lawco2concs = data_rows[:, -1]
# Data from: http://www.sidc.be/silso/DATA/SN_y_tot_V2.0.txt
# NB: since 2015, yearssn.dat has been enhanced into SN_y_tot_V2.0.txt
sun_data = np.loadtxt("SN_y_tot_V2.0.txt", dtype=float)
sun_years = sun_data[:, 0]
sunspots = sun_data[:, 1]
# Compute the relevant smooth averages
smoothed_temps = smooth(temps, 75)
smoothed_sunspots = smooth(sunspots, 25)
"""
Plotting part
"""
fig_label = "temp-co2-sunspot"
plt.close(fig_label)
fig, base_ax = plt.subplots(num=fig_label)
# Setup base axes
base_ax.set_xlabel("Year")
base_ax.set_title("Temperature, CO$_2$, and sunspots") # Redundant with legend?
base_ax.xaxis.tick_bottom() # Not necessary anymore with matplotlib 2.x
base_ax.yaxis.tick_left() # Not necessary anymore with matplotlib 2.x
base_ax.set_yticks([])
base_ax.set_xlim(1850, 2016)
base_ax.xaxis.set_minor_locator(MultipleLocator(20))
base_ax.xaxis.set_minor_locator(MultipleLocator(10))
# Temperature
temp_ax = fig.add_axes([0.125, 0.5, 0.775, 0.4], frameon=False)
temp_ax.yaxis.tick_left() # Not necessary anymore with matplotlib 2.x
temp_ax.plot(temp_years, temps, color='#DD4422')
tline, = temp_ax.plot(temp_years, smoothed_temps, color='#990000', lw=2.5, ls='--')
temp_ax.set_xlim(base_ax.get_xlim())
temp_ax.yaxis.set_major_locator(MultipleLocator(0.4))
temp_ax.set_ylabel(u'Temp. anomaly (°C)')
temp_ax.set_xticks([])
# Carbon dioxide
co2_ax = fig.add_axes([0.125, 0.3, 0.775, 0.4], frameon=False)
co2_ax.yaxis.tick_right()
co2_ax.yaxis.set_label_position("right")
co2_ax.plot(co2_years, co2concs, color='#44AAFF')
cline, = co2_ax.plot(lawco2_years, lawco2concs, color='#2288EE', lw=2, ls='-')
co2_ax.set_xlim(base_ax.get_xlim())
co2_ax.yaxis.set_major_locator(MultipleLocator(20))
co2_ax.set_ylabel(r'CO$_2$ (ppm)')
co2_ax.set_xticks([])
# Sunspots
sun_ax = fig.add_axes([0.125, 0.1, 0.775, 0.4], frameon=False)
sun_ax.yaxis.tick_left() # Not necessary anymore with matplotlib 2.x
sun_ax.plot(sun_years, sunspots, color="#FFDD00")
sline, = sun_ax.plot(sun_years, smoothed_sunspots, color="#E66C00", lw=2.5, ls=':')
sun_ax.set_xlim(base_ax.get_xlim())
sun_ax.yaxis.set_major_locator(MultipleLocator(50))
sun_ax.set_ylabel("Sunspot number")
sun_ax.set_xticks([])
# Legend from proxy Artists instances (matplotlib idiom in case of subplots)
t_proxy = Line2D([0], [0], color=tline.get_color(), lw=tline.get_lw(), ls=tline.get_ls(), axes=base_ax)
c_proxy = Line2D([0], [0], color=cline.get_color(), lw=cline.get_lw(), ls=cline.get_ls(), axes=base_ax)
s_proxy = Line2D([0], [0], color=sline.get_color(), lw=sline.get_lw(), ls=sline.get_ls(), axes=base_ax)
base_ax.legend((t_proxy, c_proxy, s_proxy), ("Temperature", "CO$_2$", "Sunspots"), ncol=3, loc="upper center")
# Adjust y-ticks and y-label color
for ax, line in ((temp_ax, tline), (co2_ax, cline), (sun_ax, sline)):
ax.yaxis.label.set_color(line.get_color())
ax.yaxis.set_tick_params(labelcolor=line.get_color())
#ax.yaxis.set_tick_params(color=line.get_color()) # Maybe too much
fig.savefig(fig.get_label() + ".svg")
plt.show()
##########
Licensing[edit]
I, the copyright holder of this work, hereby publish it under the following license:
This file is licensed under the Creative Commons Attribution-Share Alike 4.0 International license.
- You are free:
- to share – to copy, distribute and transmit the work
- to remix – to adapt the work
- Under the following conditions:
- attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
- share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.
This W3C-unspecified plot was created with Matplotlib.
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Thumbnail | Dimensions | User | Comment | |
|---|---|---|---|---|---|
| current | 09:52, 27 September 2016 | | 720 × 540 (123 KB) | Adrien F. Vincent (talk | contribs) | User created page with UploadWizard |
You cannot overwrite this file.
File usage on Commons
There are no pages that use this file.
