Past rates of accumulation in central West Antarctica
[1] The spatial variation in ice accumulation is critical to the form and stability of ice sheets. In West Antarctica, knowledge of present ice accumulation rates is restricted to sparse measurements and interpolations across data free regions, while information on former ice accumulation is restric...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.511.5164 2023-05-15T14:01:47+02:00 Past rates of accumulation in central West Antarctica Martin J. Siegert Antony J. Payne The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.511.5164 http://www.cpom.org/research/mjs-grl2.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.511.5164 http://www.cpom.org/research/mjs-grl2.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://www.cpom.org/research/mjs-grl2.pdf text ftciteseerx 2016-01-08T09:40:03Z [1] The spatial variation in ice accumulation is critical to the form and stability of ice sheets. In West Antarctica, knowledge of present ice accumulation rates is restricted to sparse measurements and interpolations across data free regions, while information on former ice accumulation is restricted to a small number of ice cores and numerical modeling results. Here, isochronous internal ice sheet layers, recorded by airborne radio-echo sounding and dated at their stratigraphic position at the Byrd ice core site, are used to reconstruct the spatial pattern of accumulation across the main West Antarctic ice divide for the past 16,000 years. Mean accumulation calculated for the last 3100 years matches well to present-day accumulation rates, which is compatible with previous observations on Siple Dome. Accumulation between 6400 and 16,000 years ago is calculated to be around half that at present, in accordance with recent ice sheet modeling results. INDEX TERMS: Text Antarc* Antarctic Antarctica ice core Ice Sheet West Antarctica Unknown Antarctic Byrd Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Dome ENVELOPE(-148.833,-148.833,-81.667,-81.667) West Antarctica |
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Open Polar |
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ftciteseerx |
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English |
description |
[1] The spatial variation in ice accumulation is critical to the form and stability of ice sheets. In West Antarctica, knowledge of present ice accumulation rates is restricted to sparse measurements and interpolations across data free regions, while information on former ice accumulation is restricted to a small number of ice cores and numerical modeling results. Here, isochronous internal ice sheet layers, recorded by airborne radio-echo sounding and dated at their stratigraphic position at the Byrd ice core site, are used to reconstruct the spatial pattern of accumulation across the main West Antarctic ice divide for the past 16,000 years. Mean accumulation calculated for the last 3100 years matches well to present-day accumulation rates, which is compatible with previous observations on Siple Dome. Accumulation between 6400 and 16,000 years ago is calculated to be around half that at present, in accordance with recent ice sheet modeling results. INDEX TERMS: |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Martin J. Siegert Antony J. Payne |
spellingShingle |
Martin J. Siegert Antony J. Payne Past rates of accumulation in central West Antarctica |
author_facet |
Martin J. Siegert Antony J. Payne |
author_sort |
Martin J. Siegert |
title |
Past rates of accumulation in central West Antarctica |
title_short |
Past rates of accumulation in central West Antarctica |
title_full |
Past rates of accumulation in central West Antarctica |
title_fullStr |
Past rates of accumulation in central West Antarctica |
title_full_unstemmed |
Past rates of accumulation in central West Antarctica |
title_sort |
past rates of accumulation in central west antarctica |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.511.5164 http://www.cpom.org/research/mjs-grl2.pdf |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
geographic |
Antarctic Byrd Siple Siple Dome West Antarctica |
geographic_facet |
Antarctic Byrd Siple Siple Dome West Antarctica |
genre |
Antarc* Antarctic Antarctica ice core Ice Sheet West Antarctica |
genre_facet |
Antarc* Antarctic Antarctica ice core Ice Sheet West Antarctica |
op_source |
http://www.cpom.org/research/mjs-grl2.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.511.5164 http://www.cpom.org/research/mjs-grl2.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
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1766271832056397824 |