File:Vostok Petit data.svg

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Summary

Description

La bildo estas kopiita de wikipedia:en. La originala priskribo estas: Graph of CO2 (Green graph), temperature (Blue graph), and dust concentration (Red graph) measured from the Vostok, Antarctica ice core as reported by Petit et al., 1999. Higher dust levels are believed to be caused by cold, dry periods. The Earth's orbital eccentricity, tilt, and precession vary in a pattern over thousands of years. The IPCC notes that Milankovitch cycles drove the ice age cycles; CO2 followed temperature change "with a lag of some hundreds of years" (visible on a graph more zoomed in than this); and that as a feedback amplified temperature change. Among other factors, CO2 is more soluble in colder than in warmer waters.

العربية: مخطّطٌ يُبيّن علاقة ثاني أوكسيد الكاربون ودرجة الحرارة وتركيز الغبار في قالب جليد فوستوك (بالإنجليزيّة: Vostok ice core) خلال 450,000 سنة الماضيّة
Date
Source Own work based on: Vostok-ice-core-petit.png by NOAA
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SVG development
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The SVG code is valid.
 
This plot was created with Gnuplot.
 
 This file is translated using SVG switch elements: all translations are stored in the same file.

Data sets used are:

 
This plot was created with Gnuplot.

Source code

InfoField

Gnuplot code

unset multiplot
set term svg size 1024,768
set output "vostok-data.svg"

set border 3
set xtics nomirror
set ytics nomirror
unset xlabel
unset ylabel

set grid y
set multiplot layout 3,1

set ylabel "°C"
plot [-425:0] [-10:4] \
        "deutnat.txt" \
        using (-$2/1000):4 \
        title "Temperature variation (ΔT)" \
        ls 3 \
        with lines

set ylabel "ppmv"
plot [-425:0] \
        "co2nat.txt" \
        using (-$1/1000):2 \
        title "Carbon Dioxide" \
        ls 2 \
        with lines

set xlabel "Thousands of years ago"
set ylabel "ppm"
plot [-425:0] \
        "dustnat.txt" \
        using (-$1/1000):2 \
        title "Dust concentration" \
        ls 1 \
        with lines

Explanation

After executing gnuplot, the resulting SVG file was manually changed to
* remove the negative signs for the x axis values
* change the [[:w:hyphen-minus|hyphen-minus]] characters in the temperature axis values to proper minus sign characters
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Original upload log

This image is a derivative work of the following images:

  • Vostok-ice-core-petit.png licensed with Cc-by-sa-3.0-migrated, GFDL
    • 2006-02-15T20:38:10Z ‍Maksim 598x441 (31557 Bytes) La bildo estas kopiita de wikipedia:en. La originala priskribo estas: Graph of [[carbon dioxide|CO2]], [[temperature]], and dust concentration measured from the [[Vostok, Antarctica]] [[ice core]] as reported by Petit et al.

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inception

20 June 2010

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Date/TimeThumbnailDimensionsUserComment
current13:01, 25 June 2021Thumbnail for version as of 13:01, 25 June 20211,024 × 768 (81 KB)Matěj OrlickýFile uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for cs.
22:25, 30 November 2013Thumbnail for version as of 22:25, 30 November 20131,024 × 768 (77 KB)SeL mediatime axis reversed
17:39, 25 September 2011Thumbnail for version as of 17:39, 25 September 20111,024 × 768 (309 KB)Hel-hamatext improved
03:07, 27 April 2011Thumbnail for version as of 03:07, 27 April 20111,024 × 768 (83 KB)AwickertDidn't realize that it was a draw-on box instead of a measuring-box. Take 3!
03:05, 27 April 2011Thumbnail for version as of 03:05, 27 April 20111,024 × 768 (83 KB)Awickert[Shoot - last time, picked original instead of new version to upload] Manually moved axes in Inkscape such that the three plots line up with one another
03:02, 27 April 2011Thumbnail for version as of 03:02, 27 April 20111,024 × 768 (75 KB)AwickertManually moved axes in Inkscape such that the three plots line up with one another
13:25, 20 June 2010Thumbnail for version as of 13:25, 20 June 20101,024 × 768 (75 KB)Autopilot{{Information |Description=La bildo estas kopiita de wikipedia:en. La originala priskribo estas: Graph of CO<sub>2</sub> (Green graph), temperature (Blue graph), and dust concentration (Red graph) measured from the [[Vostok, Antarc

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