File:Vostok Petit data.svg

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
Author
Original:
Unknown
 
Vector:
Category:Vectorizations
Other versions

Derivative works of this file:
SVG development
InfoField
 The SVG code is valid.
 This plot was created with gnuplot.
Category:Valid SVG created with Gnuplot#Vostok%20Petit%20data.svg
  Category:Translation possible - SVG (switch)This file is translated using SVG switch elements: all translations are stored in the same file.

Data sets used are:

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
I, the copyright holder of this work, hereby publish it under the following licenses:
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This licensing tag was added to this file as part of the GFDL licensing update.
Category:CC-BY-SA-3.0-migrated#Vostok%20Petit%20data.svg
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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.

Uploaded with derivativeFX Category:Uploaded with derivativeFX

Category:Atmospheric CO2 time series Category:Climatological charts Category:Glaciological charts of Lake Vostok Category:Geochemical charts Category:SVG geology charts Category:Milankovitch cycles Category:Pleistocene Category:Holocene Category:Climate variability and change
Category:Atmospheric CO2 time series Category:CC-BY-SA-3.0-migrated Category:Climate variability and change Category:Climatological charts Category:Created with Gnuplot code Category:Files with derivative versions Category:GFDL Category:Geochemical charts Category:Glaciological charts of Lake Vostok Category:Holocene Category:License migration redundant Category:Milankovitch cycles Category:Pleistocene Category:SVG geology charts Category:Self-published work Category:Translation possible - SVG (switch) Category:Uploaded with derivativeFX Category:Valid SVG created with Gnuplot Category:Vectorizations