Image:Epica do18 plot.png

From Wikipedia, the free encyclopedia

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.

Ice core refers as does proxy.

Data sources:

EPICA: http://www.ngdc.noaa.gov/paleo/icecore/antarctica/domec/domec_epica_data.html

Vostok: http://www.ngdc.noaa.gov/paleo/icecore/antarctica/vostok/vostok_data.html

Plotted using the IDL language by W. M. Connolley.

Note that despite the filename and caption, the values plotted are delta-deuterium not delta-o-18.[PLEASE correct]


Source code

a=readfromfile('edc_dd1.txt',col=6,ign=1)

b=readfromfile('vostok_deutnat1.txt',ign=1,col=4)

!p.multi=[0,1,2]

ep=reform(a(5,*))
vo=reform(b(2,*))

plot,a(4,*),ep,title='delta-D vs age',/xs,ymarg=[2,5],yr=makerange([ep,vo])
oplot,col=3,b(1,*),vo
add_key,/rig,['EPICA','Vostok'],[!p.colour,3]

plot,a(0,*)+3,ep,title='delta-D vs depth',/xs,ymarg=[5,2],xr=makerange(b(0,*)),yr=makerange([ep,vo])
oplot,col=3,b(0,*),vo
gettwogifs,out='~/np/wmc/b'


File history

Click on a date/time to view the file as it appeared at that time.

Date/Time Dimensions User Comment
current 20:20, 13 August 2004 596×417 (11 KB) William M. Connolley ( Talk | contribs)
revert 20:19, 13 August 2004 596×460 (6 KB) William M. Connolley ( Talk | contribs)

    See the setup instructions for more information.

The following file is a duplicate of this file:

The following pages on Schools Wikipedia link to this image (list may be incomplete):
This Wikipedia Selection has a sponsor: SOS Children , and is mainly selected from the English Wikipedia with only minor checks and changes (see www.wikipedia.org for details of authors and sources). See also our Disclaimer.