Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica
Understanding how ice sheets responded to past climate change is fundamental to forecasting how they will respond in the future. Numerical models calculating the evolution of ice sheets depend upon accumulation data, which are principally available from ice cores. Here, we calculate past rates of ic...
Main Authors: | , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
International Glaciological Society
2004
|
Subjects: | |
Online Access: | https://www.zora.uzh.ch/id/eprint/139525/ https://www.zora.uzh.ch/id/eprint/139525/1/2004_Reconstructing_ice-sheet_accumulation_rates_at_rid.pdf https://doi.org/10.5167/uzh-139525 https://doi.org/10.3189/172756404781814519 |
id |
ftunivzuerich:oai:www.zora.uzh.ch:139525 |
---|---|
record_format |
openpolar |
spelling |
ftunivzuerich:oai:www.zora.uzh.ch:139525 2024-06-23T07:45:37+00:00 Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica Leysinger Vieli, Gwendolyn Siegert, Martin J Payne, Antony J 2004 application/pdf https://www.zora.uzh.ch/id/eprint/139525/ https://www.zora.uzh.ch/id/eprint/139525/1/2004_Reconstructing_ice-sheet_accumulation_rates_at_rid.pdf https://doi.org/10.5167/uzh-139525 https://doi.org/10.3189/172756404781814519 eng eng International Glaciological Society https://www.zora.uzh.ch/id/eprint/139525/1/2004_Reconstructing_ice-sheet_accumulation_rates_at_rid.pdf doi:10.5167/uzh-139525 doi:10.3189/172756404781814519 urn:issn:0260-3055 info:eu-repo/semantics/openAccess Leysinger Vieli, Gwendolyn; Siegert, Martin J; Payne, Antony J (2004). Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica. Annals of Glaciology, 39(1):326-330. Institute of Geography 910 Geography & travel Journal Article PeerReviewed info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2004 ftunivzuerich https://doi.org/10.5167/uzh-13952510.3189/172756404781814519 2024-05-29T00:40:13Z Understanding how ice sheets responded to past climate change is fundamental to forecasting how they will respond in the future. Numerical models calculating the evolution of ice sheets depend upon accumulation data, which are principally available from ice cores. Here, we calculate past rates of ice accumulation using internal layering. The englacial structure of the East Antarctic ice divide at ridge B is extracted from airborne ice-penetrating radar. The isochronous surfaces are dated at their intersection with the Vostok ice-core site, where the depth–age relationship is known. The dated isochrons are used as input to a one-dimensional ice-flow model to investigate the spatial accumulation distribution. The calculations show that ice-accumulation rates generally increase from Vostok lake towards ridge B. The western flank of the ice divide experiences markedly more accumulation than in the east. Further, ice accumulation increases northwards along the ice divide. The results also show the variability of accumulation in time and space around the ridge B ice divide over the last 124 000 years. Article in Journal/Newspaper Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet University of Zurich (UZH): ZORA (Zurich Open Repository and Archive Antarctic East Antarctica Vostok Lake ENVELOPE(104.750,104.750,-77.392,-77.392) |
institution |
Open Polar |
collection |
University of Zurich (UZH): ZORA (Zurich Open Repository and Archive |
op_collection_id |
ftunivzuerich |
language |
English |
topic |
Institute of Geography 910 Geography & travel |
spellingShingle |
Institute of Geography 910 Geography & travel Leysinger Vieli, Gwendolyn Siegert, Martin J Payne, Antony J Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica |
topic_facet |
Institute of Geography 910 Geography & travel |
description |
Understanding how ice sheets responded to past climate change is fundamental to forecasting how they will respond in the future. Numerical models calculating the evolution of ice sheets depend upon accumulation data, which are principally available from ice cores. Here, we calculate past rates of ice accumulation using internal layering. The englacial structure of the East Antarctic ice divide at ridge B is extracted from airborne ice-penetrating radar. The isochronous surfaces are dated at their intersection with the Vostok ice-core site, where the depth–age relationship is known. The dated isochrons are used as input to a one-dimensional ice-flow model to investigate the spatial accumulation distribution. The calculations show that ice-accumulation rates generally increase from Vostok lake towards ridge B. The western flank of the ice divide experiences markedly more accumulation than in the east. Further, ice accumulation increases northwards along the ice divide. The results also show the variability of accumulation in time and space around the ridge B ice divide over the last 124 000 years. |
format |
Article in Journal/Newspaper |
author |
Leysinger Vieli, Gwendolyn Siegert, Martin J Payne, Antony J |
author_facet |
Leysinger Vieli, Gwendolyn Siegert, Martin J Payne, Antony J |
author_sort |
Leysinger Vieli, Gwendolyn |
title |
Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica |
title_short |
Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica |
title_full |
Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica |
title_fullStr |
Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica |
title_full_unstemmed |
Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica |
title_sort |
reconstructing ice-sheet accumulation rates at ridge b, east antarctica |
publisher |
International Glaciological Society |
publishDate |
2004 |
url |
https://www.zora.uzh.ch/id/eprint/139525/ https://www.zora.uzh.ch/id/eprint/139525/1/2004_Reconstructing_ice-sheet_accumulation_rates_at_rid.pdf https://doi.org/10.5167/uzh-139525 https://doi.org/10.3189/172756404781814519 |
long_lat |
ENVELOPE(104.750,104.750,-77.392,-77.392) |
geographic |
Antarctic East Antarctica Vostok Lake |
geographic_facet |
Antarctic East Antarctica Vostok Lake |
genre |
Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet |
genre_facet |
Annals of Glaciology Antarc* Antarctic Antarctica East Antarctica ice core Ice Sheet |
op_source |
Leysinger Vieli, Gwendolyn; Siegert, Martin J; Payne, Antony J (2004). Reconstructing ice-sheet accumulation rates at ridge B, East Antarctica. Annals of Glaciology, 39(1):326-330. |
op_relation |
https://www.zora.uzh.ch/id/eprint/139525/1/2004_Reconstructing_ice-sheet_accumulation_rates_at_rid.pdf doi:10.5167/uzh-139525 doi:10.3189/172756404781814519 urn:issn:0260-3055 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5167/uzh-13952510.3189/172756404781814519 |
_version_ |
1802641554237554688 |