File:EPICA delta D plot.svg

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Description	Plots of delta-deuterium against age and depth (from EPICA and Vostok). Note that the Vostok core is deeper, but does not extend as far back in time. Note also that the y-axis offset between the EPICA and Vostok cores in delta-deuterium is real: Vostok is a colder site, hence has more negative delta. Differences in the apparent age of events are likely to be inaccuracies in converting ice depth to age.
Date	2010-06-20 12:20 (UTC)
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Author	derivative work: Autopilot ( talk)

This vector image was created with gnuplot.

This is a retouched picture, which means that it has been digitally altered from its original version. Modifications: Generated as svg. The original can be viewed here: Epica_18_plot.png.

Data sets from:

Generated with gnuplot:

unset multiplot
set term svg size 1024,768
set output "epica-18.svg"

set grid y
set multiplot layout 2,1
set ylabel "δD"

set title "δD versus age"
set xlabel "Years before present"
plot [0:750000] \
 "epica.txt" using 3:6 title "EPICA" with lines, \
 "vostok.txt" using 2:3 title "Vostok" with lines

set title "δD versus depth"
set xlabel "Depth in m"
plot \
 "epica.txt" using 1:6 title "EPICA" with lines, \
 "vostok.txt" using 1:3 title "Vostok" with lines

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The following pages on Schools Wikipedia link to this image (list may be incomplete):

Ice core

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Image title	Produced by GNUPLOT 4.2 patchlevel 5

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