Konrad, H orcid.org/0000-0002-5058-8637, Gilbert, L, Cornford, SL et al. (4 more authors) (2017) Uneven onset and pace of ice-dynamical imbalance in the Amundsen Sea Embayment, West Antarctica. Geophysical Research Letters, 44 (2). pp. 910-918. ISSN 0094-8276
Abstract
We combine measurements acquired by five satellite altimeter missions to obtain an uninterrupted record of ice-sheet elevation change over the Amundsen Sea Embayment, West Antarctica, since 1992. Using these data, we examine the onset of surface lowering arising through ice-dynamical imbalance, and the pace at which it has propagated inland, by tracking elevation changes along glacier flowlines. Surface lowering has spread slowest (<6 km/yr) along the Pope, Smith, and Kohler (PSK) Glaciers, due to their small extent. Pine Island Glacier (PIG) is characterized by a continuous inland spreading of surface lowering, notably fast at rates of 13 to 15 km/yr along tributaries draining the southeastern lobe, possibly due to basal conditions or tributary geometry. Surface lowering on Thwaites Glacier (THG) has been episodic, and has spread inland fastest (10 to 12 km/yr) along its central flowlines. The current episodes of surface lowering started approximately 10 yr before the first measurements on PSK, around 1990 on PIG, and around 2000 on THG. Ice-dynamical imbalance across the sector has therefore been uneven during the satellite record.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | ©2016. The Authors. This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited |
Keywords: | glacier retreat; Amundsen Sea; satellite altimetry |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Environment (Leeds) > School of Earth and Environment (Leeds) > Inst for Climate & Atmos Science (ICAS) (Leeds) |
Funding Information: | Funder Grant number NERC No External Reference Royal Society WM130123 NERC NE/J005681/1 European Space Agency 4000105610/12/I-BG European Space Agency No External Ref |
Depositing User: | Symplectic Publications |
Date Deposited: | 08 Dec 2016 16:47 |
Last Modified: | 23 Jun 2023 22:19 |
Published Version: | https://doi.org/10.1002/2016GL070733 |
Status: | Published |
Publisher: | American Geophysical Union (AGU) |
Identification Number: | 10.1002/2016GL070733 |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:109089 |