Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing
A linearized perturbation about a two-dimensional Vialov-Nye icesheet profile is used to investigate the sensitivity of the divide position at Siple Dome, West Antarctica, to small changes in the accumulation pattern and in the elevation of its lateral boundaries at the margins of Ice Streams C and...
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International Glaciological Society
1998
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ftnerc:oai:nora.nerc.ac.uk:504212 2023-05-15T13:29:22+02:00 Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing Nereson, N.A. Hindmarsh, R.C.A. Raymond, C.F. 1998 http://nora.nerc.ac.uk/id/eprint/504212/ unknown International Glaciological Society Nereson, N.A.; Hindmarsh, R.C.A. orcid:0000-0003-1633-2416 Raymond, C.F. 1998 Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing. Annals of Glaciology, 27. 207-214. Publication - Article PeerReviewed 1998 ftnerc 2023-02-04T19:38:19Z A linearized perturbation about a two-dimensional Vialov-Nye icesheet profile is used to investigate the sensitivity of the divide position at Siple Dome, West Antarctica, to small changes in the accumulation pattern and in the elevation of its lateral boundaries at the margins of Ice Streams C and D. Relaxation time-scales for the icesheet surface and divide position are derived from the perturbation theory. For Siple Dome, these time-scales are short: 450-800 years for surface adjustment, and 200-350 years for divide position adjustment. These short time-scales indicate that Siple Dome responds quickly to forcing at its boundaries. Therefore, the recent migration of the Siple Dome divide (determined from previous work) is probably a response to an ongoing, sustained forcing rather than a response to a long-past climate event such as the transition from the Last Glacial Maximum to the Holocene. Based on our analysis, the inferred rate of migration of the Siple Dome divide could be attained be/': Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctica West Antarctica Natural Environment Research Council: NERC Open Research Archive West Antarctica Siple ENVELOPE(-83.917,-83.917,-75.917,-75.917) Siple Dome ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
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description |
A linearized perturbation about a two-dimensional Vialov-Nye icesheet profile is used to investigate the sensitivity of the divide position at Siple Dome, West Antarctica, to small changes in the accumulation pattern and in the elevation of its lateral boundaries at the margins of Ice Streams C and D. Relaxation time-scales for the icesheet surface and divide position are derived from the perturbation theory. For Siple Dome, these time-scales are short: 450-800 years for surface adjustment, and 200-350 years for divide position adjustment. These short time-scales indicate that Siple Dome responds quickly to forcing at its boundaries. Therefore, the recent migration of the Siple Dome divide (determined from previous work) is probably a response to an ongoing, sustained forcing rather than a response to a long-past climate event such as the transition from the Last Glacial Maximum to the Holocene. Based on our analysis, the inferred rate of migration of the Siple Dome divide could be attained be/': |
format |
Article in Journal/Newspaper |
author |
Nereson, N.A. Hindmarsh, R.C.A. Raymond, C.F. |
spellingShingle |
Nereson, N.A. Hindmarsh, R.C.A. Raymond, C.F. Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing |
author_facet |
Nereson, N.A. Hindmarsh, R.C.A. Raymond, C.F. |
author_sort |
Nereson, N.A. |
title |
Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing |
title_short |
Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing |
title_full |
Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing |
title_fullStr |
Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing |
title_full_unstemmed |
Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing |
title_sort |
sensitivity of the divide position at siple dome, west antarctica to boundary forcing |
publisher |
International Glaciological Society |
publishDate |
1998 |
url |
http://nora.nerc.ac.uk/id/eprint/504212/ |
long_lat |
ENVELOPE(-83.917,-83.917,-75.917,-75.917) ENVELOPE(-148.833,-148.833,-81.667,-81.667) |
geographic |
West Antarctica Siple Siple Dome |
geographic_facet |
West Antarctica Siple Siple Dome |
genre |
Annals of Glaciology Antarc* Antarctica West Antarctica |
genre_facet |
Annals of Glaciology Antarc* Antarctica West Antarctica |
op_relation |
Nereson, N.A.; Hindmarsh, R.C.A. orcid:0000-0003-1633-2416 Raymond, C.F. 1998 Sensitivity of the divide position at Siple Dome, West Antarctica to boundary forcing. Annals of Glaciology, 27. 207-214. |
_version_ |
1766000167899627520 |