File:Sunspot-co2.jpg
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- 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
Source
[edit]Data Sources
[edit]- (light blue) Law Dome CO2 Data: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law_co2.txt
- (blue) Mauna Loa CO2 data:http://www.esrl.noaa.gov/gmd/ccgg/trends/co2_mm_mlo.dat
- (red) Temperature Data: http://www.cru.uea.ac.uk/cru/data/temperature/hadcrut3gl.txt archive copy at the Wayback Machine
- (orange) Sunspot data:http://sidc.oma.be/DATA/yearssn.dat archive copy at the Wayback Machine
Plot Generation
[edit]The plot was generated by the following Python script:
# -*- coding: utf-8 -*-
import numpy as np
import matplotlib.pylab as plt
import urllib
def smooth(signal, window_size):
extended_signal = signal[window_size:0:-1] + signal + signal[-1:-window_size:-1]
s = np.array(extended_signal)
w = np.hamming(window_size)
y = np.convolve(w/w.sum(), s, mode="same")
return y[window_size:-window_size+1]
temp_file = urllib.urlopen("http://www.cru.uea.ac.uk/cru/data/temperature/hadcrut3gl.txt")
data_rows = [x.split() for x in temp_file][0:-1:2]
temp_years = [int(x[0]) for x in data_rows]
temps = [float(x[-1]) for x in data_rows]
#co2_file = urllib.urlopen("http://web.archive.org/web/20070829134646/http://www.esrl.noaa.gov/gmd/ccgg/trends/co2_mm_mlo.dat")
co2_file = urllib.urlopen("ftp://ftp.cmdl.noaa.gov/ccg/co2/trends/co2_mm_mlo.txt")
data_rows = [x.split() for x in co2_file if not x.startswith("#") and x.find("-99.99") == -1]
co2_years = [(float(x[0]) + (float(x[1])-0.5)/12.) for x in data_rows]
co2concs = [float(x[3]) for x in data_rows]
lawco2_file = urllib.urlopen("ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/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.):]
lawco2_years = [float(x[0]) for x in data_rows]
lawco2concs = [float(x[-1]) for x in data_rows]
sunspot_file = urllib.urlopen("http://sidc.oma.be/DATA/yearssn.dat")
data_rows = [x.split() for x in sunspot_file if "*" not in x]
sun_years = [float(x[0]) for x in data_rows]
sunspots = [float(x[-1]) for x in data_rows]
smoothed_temps = smooth(temps, 25)
smoothed_sunspots = smooth(sunspots, 25)
base_ax = plt.axes()
base_ax.yaxis.tick_left()
plt.yticks([])
plt.xlim(1850,2012)
plt.xlabel("Year", size=16)
plt.title("Temperature, CO$_2$, and Sunspots", size=22)
temp_ax = plt.axes([0.125,0.5,0.775,0.4], frameon=False)
temp_ax.yaxis.tick_left()
plt.plot(temp_years, temps, '#FF2200')
tline = plt.plot(temp_years, smoothed_temps, '#AA0000', lw=3)
plt.xlim(1850,2012)
plt.yticks(np.arange(-0.6,0.6,0.2))
plt.ylabel(u'Temperature anomaly (C)', size=14)
plt.xticks([])
co2_ax = plt.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.xaxis.tick_bottom()
plt.plot(co2_years, co2concs, '#44AAFF')
cline = plt.plot(lawco2_years, lawco2concs, '#2288EE', lw=2)
plt.xlim(1850,2012)
plt.ylabel(r'CO$_2$ (ppm)', size=14)
plt.xticks([])
sun_ax = plt.axes([0.125,0.1,0.775,0.4], frameon=False)
sun_ax.yaxis.tick_left()
plt.plot(sun_years, sunspots, "#FFDD00")
sline = plt.plot(sun_years, smoothed_sunspots, "#FF9900", lw=3)
plt.xlim(1850,2012)
plt.yticks(np.arange(0,200,50))
plt.ylabel("Sunspot number", size=14)
plt.xticks([])
plt.axes(base_ax)
plt.legend((tline, cline, sline), ("Temperature", "CO$_2$", "Sunspots"), "upper left")
plt.savefig("temp-co2-sunspot.svg")
plt.show()
The plot can likely be updated for more recent data using these same script, though minor modifications may be required for changes in data formats, locations, etc.
This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Subject to disclaimers. | ||
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Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. Subject to disclaimers.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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current | 10:12, 17 June 2007 | 971 × 782 (71 KB) | Szdori (talk | contribs) | *en: Global average temperature, atmospheric CO2, and sunspot activity since 1850. *Source: [http://en.wikipedia.org/wiki/Image:Temp-sunspot-co2.svg] {{GFDL-self-with-disclaimers}} |
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