File:Ccsm3 trace21k tjuly 21000bp europe 2.svg

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Original file ‎(SVG file, nominally 1,236 × 1,052 pixels, file size: 12.54 MB)

Captions

Captions

July temperature 21000 yearas ago, Europe, CCSM3 Trace21ka simulation

Summary

[edit]
Description
English: Average temperature of July, 21000 years ago, Europe.
Date
Source Own work
Author Merikanto
This SVG image contains embedded raster graphics.[1] Such images are liable to produce inferior results when scaled to different sizes (as well as possibly being very inefficient in file size). If appropriate to do so, they should be replaced with images created using vector graphics.
Note: This template is only supposed to be used if the SVG file mixes vector and raster graphics. If the SVG file only contains raster graphics {{FakeSVG}} is supposed to be used. See also {{TopoSVG}}.

This image is downscaled Trace21ka CCSM3 TS data slice.

Downslscaling elevation data is GLACC1d and ETOPO1.

Downscaling is done with various R scripts that usess R dissever 'lm' downscaling against GLAC1D and simple lapse rate delta method against ETOPO1 raster.

Note: The downslaling is maybeaccurate due to inaccuracies in scripts.

Scipts are there

File:CCSM3_17000BP_JulyT_1.svg

Data is visualized with Anaconda "conda" Python script. Uses matplotlib, baemap ...

pplotdata.py

    1. netcdf plotting program
    2. lat, lon, zvar!
  1. -*- coding: utf-8 -*-

from mpl_toolkits.basemap import Basemap, cm import matplotlib.pyplot as plt from netCDF4 import Dataset as open_ncfile import numpy as np

    1. preprocess with GMT 5.4
  2. gmt grdcut tk7_gauss1.nc -Gwest_europe_tk7.nc -R-10/50/30/60
  1. netcdf infile name, variable names
  2. lon, lat, z vars

infilename='./data_result/result.nc' zvarlabel='TS' latvarlabel='lat' lonvarlabel='lon'

  1. labels

legtitle="T July avg.°C (21000 BP, CCSM3)" plottitle="Temperature of July (21000 BP, Trace21ka CCSM3 )"

    1. output

outimage="./plotz/out.svg"

  1. outpdf="out.pdf"
  1. cmap

kolormap='jet'

  1. kolormap='Spectral_r'
  2. kolormap='gist_rainbow_r'
  3. kolormap='rainbow'
    1. cmap min, max

zeta=-15 zetb=25

lona=-15 lonb=40 lata=30 latb=70


latdx=5 londy=5

deltazc=1.5 deltazd=5 dpi = 70

  1. -- open netcdf file

nc = open_ncfile(infilename)

var = nc.variables[zvarlabel][:,:]

var2=np.flipud(var)


lat = nc.variables[latvarlabel][:] lon = nc.variables[lonvarlabel][:]

  1. -- create figure and axes instances

fig = plt.figure(figsize=(1100/dpi, 1100/dpi), dpi=dpi) ax = fig.add_axes([0.1,0.1,0.8,0.9])

  1. map = Basemap(projection='cyl',llcrnrlat=lata,urcrnrlat= latb,\
  2. resolution='h', llcrnrlon=lona,urcrnrlon=lonb)

map = Basemap(projection='cyl',llcrnrlat=lata,urcrnrlat= latb,\ 

             resolution='h',  llcrnrlon=lona,urcrnrlon=lonb)


map.drawcoastlines(color='darkblue') map.drawrivers(color='blue')

  1. map.drawstates()
  2. map.drawcountries()
  1. kolorado=('black','black','black','black','black','black','black','black','black','black','black','black','black','black','black','black')

kolorado=( (0.0, 0.0, 0.5),(0.0, 0.0, 0.5),(0.0, 0.0, 0.5),(0.0, 0.0, 0.5), (0.0, 0.0, 0.5),(0.0, 0.0, 0.5),(0.0, 0.0, 0.5),(0.0, 0.0, 0.5))


map.drawparallels(np.arange(lata, latb,latdx),labels=[1,0,0,0],fontsize=20) map.drawmeridians(np.arange(lona,lonb,londy),labels=[0,0,0,1],fontsize=20)

x, y = map(*np.meshgrid(lon,lat))


clevs = np.arange(zeta,zetb,deltazc) dlevs = np.arange(zeta,zetb,deltazd)

  1. xx, yy = np.meshgrid(lon, lat)
  2. map.pcolormesh(xx, yy, var)


maplot1=map.imshow(var2, cmap=kolormap, vmin=zeta, vmax=zetb)

plt.rc('lines', linewidth=0.5, color='#000000')

cnplot = map.contour(x,y,var,dlevs,colors=kolorado)

  1. cnplot = map.contour(x,y,var,dlevs,colors='k')


cbar = map.colorbar(maplot1,location='bottom',pad="10%", label='T avg July oC') cbar.set_label(legtitle, fontsize=20)

cbar.ax.tick_params(labelsize=16)

plt.clabel(cnplot, fmt='%.0f',fontsize=15, inline=1)

plt.title(plottitle, fontsize=24)

  1. plt.show()

plt.savefig(outimage, bbox_inches='tight', dpi=dpi)

plt.savefig(outpdf, bbox_inches='tight', dpi=dpi)


Licensing

[edit]
I, the copyright holder of this work, hereby publish it under the following license:
w:en:Creative Commons
attribution share alike
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
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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.

File history

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Date/TimeThumbnailDimensionsUserComment
current06:17, 18 September 2019Thumbnail for version as of 06:17, 18 September 20191,236 × 1,052 (12.54 MB)Merikanto (talk | contribs)Orography update
09:49, 3 September 2019Thumbnail for version as of 09:49, 3 September 20191,236 × 1,052 (11.89 MB)Merikanto (talk | contribs)Downscaling was wrong
15:33, 31 August 2019Thumbnail for version as of 15:33, 31 August 20191,236 × 1,052 (9.98 MB)Merikanto (talk | contribs)User created page with UploadWizard

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