State of Equilibrium of the West Antarctic Inland Ice Sheet
Data from a traverse connecting Byrd Station, Antarctica, with the local ice divide allow calculation of the mean volume flux at points along the traverse. This is compared with current rates of surface accretion upstream from each point. Near the ice divide the ice sheet seems to be in equilibrium,...
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American Association for the Advancement of Science (AAAS)
1973
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Online Access: | http://dx.doi.org/10.1126/science.182.4111.476 https://www.science.org/doi/pdf/10.1126/science.182.4111.476 |
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craaas:10.1126/science.182.4111.476 2024-06-09T07:40:46+00:00 State of Equilibrium of the West Antarctic Inland Ice Sheet Whillans, Ian M. 1973 http://dx.doi.org/10.1126/science.182.4111.476 https://www.science.org/doi/pdf/10.1126/science.182.4111.476 en eng American Association for the Advancement of Science (AAAS) Science volume 182, issue 4111, page 476-479 ISSN 0036-8075 1095-9203 journal-article 1973 craaas https://doi.org/10.1126/science.182.4111.476 2024-05-16T12:54:53Z Data from a traverse connecting Byrd Station, Antarctica, with the local ice divide allow calculation of the mean volume flux at points along the traverse. This is compared with current rates of surface accretion upstream from each point. Near the ice divide the ice sheet seems to be in equilibrium, but near Byrd Station the volume flux is in excess of that needed for ice sheet equilibrium by at least 15 percent. The discrepancy may exist because the traverse does not follow the ice flow exactly or because ice flow at depth is very complex. Although neither of the foregoing possibilities can be disproved, it seems most likely that the discrepancy is due to ice sheet thinning, as has previously been suggested by work on oxygen isotope ratios and temperature in the boreholes at Byrd Station. This thinning probably started at the end of the Wisconsin/Würm glaciation. Causes for the thinning are discussed. Article in Journal/Newspaper Antarc* Antarctic Antarctica Ice Sheet AAAS Resource Center (American Association for the Advancement of Science) Antarctic Byrd Byrd Station ENVELOPE(-119.533,-119.533,-80.017,-80.017) Science 182 4111 476 479 |
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Open Polar |
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AAAS Resource Center (American Association for the Advancement of Science) |
op_collection_id |
craaas |
language |
English |
description |
Data from a traverse connecting Byrd Station, Antarctica, with the local ice divide allow calculation of the mean volume flux at points along the traverse. This is compared with current rates of surface accretion upstream from each point. Near the ice divide the ice sheet seems to be in equilibrium, but near Byrd Station the volume flux is in excess of that needed for ice sheet equilibrium by at least 15 percent. The discrepancy may exist because the traverse does not follow the ice flow exactly or because ice flow at depth is very complex. Although neither of the foregoing possibilities can be disproved, it seems most likely that the discrepancy is due to ice sheet thinning, as has previously been suggested by work on oxygen isotope ratios and temperature in the boreholes at Byrd Station. This thinning probably started at the end of the Wisconsin/Würm glaciation. Causes for the thinning are discussed. |
format |
Article in Journal/Newspaper |
author |
Whillans, Ian M. |
spellingShingle |
Whillans, Ian M. State of Equilibrium of the West Antarctic Inland Ice Sheet |
author_facet |
Whillans, Ian M. |
author_sort |
Whillans, Ian M. |
title |
State of Equilibrium of the West Antarctic Inland Ice Sheet |
title_short |
State of Equilibrium of the West Antarctic Inland Ice Sheet |
title_full |
State of Equilibrium of the West Antarctic Inland Ice Sheet |
title_fullStr |
State of Equilibrium of the West Antarctic Inland Ice Sheet |
title_full_unstemmed |
State of Equilibrium of the West Antarctic Inland Ice Sheet |
title_sort |
state of equilibrium of the west antarctic inland ice sheet |
publisher |
American Association for the Advancement of Science (AAAS) |
publishDate |
1973 |
url |
http://dx.doi.org/10.1126/science.182.4111.476 https://www.science.org/doi/pdf/10.1126/science.182.4111.476 |
long_lat |
ENVELOPE(-119.533,-119.533,-80.017,-80.017) |
geographic |
Antarctic Byrd Byrd Station |
geographic_facet |
Antarctic Byrd Byrd Station |
genre |
Antarc* Antarctic Antarctica Ice Sheet |
genre_facet |
Antarc* Antarctic Antarctica Ice Sheet |
op_source |
Science volume 182, issue 4111, page 476-479 ISSN 0036-8075 1095-9203 |
op_doi |
https://doi.org/10.1126/science.182.4111.476 |
container_title |
Science |
container_volume |
182 |
container_issue |
4111 |
container_start_page |
476 |
op_container_end_page |
479 |
_version_ |
1801369166440038400 |