File:Vostok Petit data.svg
Original file (SVG file, nominally 1,024 × 768 pixels, file size: 81 KB)
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This is a file from the Wikimedia Commons. The description on its description page there is shown below.
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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 |
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| Source | Own work based on: Vostok-ice-core-petit.png by NOAA |
| Author |
Original: Unknown Vector: |
| Other versions |
Derivative works of this file: |
| SVG development |  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:
- ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/deutnat.txt
- ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/co2nat.txt
- ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/vostok/dustnat.txt
Source code
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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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. | |
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| This licensing tag was added to this file as part of the GFDL licensing update. |
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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. |
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.
Uploaded with derivativeFX
File history
Click on a date/time to view the file as it appeared at that time.
| Date/Time | Dimensions | User | Comment | |
|---|---|---|---|---|
| current | 06:01, 25 June 2021 | 1,024 × 768 (81 KB) | Matěj Orlický | File uploaded using svgtranslate tool (https://svgtranslate.toolforge.org/). Added translation for cs. |
File usage
The following 4 pages use this file:
