Brief communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica
A system of subglacial lakes drained on Thwaites Glacier from 2012–2014. To improve coverage for subsequent drainage events, we extended the elevation and ice-velocity time series on Thwaites Glacier through austral winter 2019. These new observations document a second drainage cycle in 2017/18 and...
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ftcopernicus:oai:publications.copernicus.org:tc84604 2023-05-15T13:31:39+02:00 Brief communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica Hoffman, Andrew O. Christianson, Knut Shapero, Daniel Smith, Benjamin E. Joughin, Ian 2020-12-18 application/pdf https://doi.org/10.5194/tc-14-4603-2020 https://tc.copernicus.org/articles/14/4603/2020/ eng eng doi:10.5194/tc-14-4603-2020 https://tc.copernicus.org/articles/14/4603/2020/ eISSN: 1994-0424 Text 2020 ftcopernicus https://doi.org/10.5194/tc-14-4603-2020 2020-12-21T17:22:13Z A system of subglacial lakes drained on Thwaites Glacier from 2012–2014. To improve coverage for subsequent drainage events, we extended the elevation and ice-velocity time series on Thwaites Glacier through austral winter 2019. These new observations document a second drainage cycle in 2017/18 and identified two new lake systems located in the western tributaries of Thwaites and Haynes glaciers. In situ and satellite velocity observations show temporary < 3 % speed fluctuations associated with lake drainages. In agreement with previous studies, these observations suggest that active subglacial hydrology has little influence on thinning and retreat of Thwaites Glacier on decadal to centennial timescales. Text Antarc* Antarctica Thwaites Glacier West Antarctica Copernicus Publications: E-Journals Austral New Lake ENVELOPE(-109.468,-109.468,62.684,62.684) Thwaites Glacier ENVELOPE(-106.750,-106.750,-75.500,-75.500) West Antarctica The Cryosphere 14 12 4603 4609 |
institution |
Open Polar |
collection |
Copernicus Publications: E-Journals |
op_collection_id |
ftcopernicus |
language |
English |
description |
A system of subglacial lakes drained on Thwaites Glacier from 2012–2014. To improve coverage for subsequent drainage events, we extended the elevation and ice-velocity time series on Thwaites Glacier through austral winter 2019. These new observations document a second drainage cycle in 2017/18 and identified two new lake systems located in the western tributaries of Thwaites and Haynes glaciers. In situ and satellite velocity observations show temporary < 3 % speed fluctuations associated with lake drainages. In agreement with previous studies, these observations suggest that active subglacial hydrology has little influence on thinning and retreat of Thwaites Glacier on decadal to centennial timescales. |
format |
Text |
author |
Hoffman, Andrew O. Christianson, Knut Shapero, Daniel Smith, Benjamin E. Joughin, Ian |
spellingShingle |
Hoffman, Andrew O. Christianson, Knut Shapero, Daniel Smith, Benjamin E. Joughin, Ian Brief communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica |
author_facet |
Hoffman, Andrew O. Christianson, Knut Shapero, Daniel Smith, Benjamin E. Joughin, Ian |
author_sort |
Hoffman, Andrew O. |
title |
Brief communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica |
title_short |
Brief communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica |
title_full |
Brief communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica |
title_fullStr |
Brief communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica |
title_full_unstemmed |
Brief communication: Heterogenous thinning and subglacial lake activity on Thwaites Glacier, West Antarctica |
title_sort |
brief communication: heterogenous thinning and subglacial lake activity on thwaites glacier, west antarctica |
publishDate |
2020 |
url |
https://doi.org/10.5194/tc-14-4603-2020 https://tc.copernicus.org/articles/14/4603/2020/ |
long_lat |
ENVELOPE(-109.468,-109.468,62.684,62.684) ENVELOPE(-106.750,-106.750,-75.500,-75.500) |
geographic |
Austral New Lake Thwaites Glacier West Antarctica |
geographic_facet |
Austral New Lake Thwaites Glacier West Antarctica |
genre |
Antarc* Antarctica Thwaites Glacier West Antarctica |
genre_facet |
Antarc* Antarctica Thwaites Glacier West Antarctica |
op_source |
eISSN: 1994-0424 |
op_relation |
doi:10.5194/tc-14-4603-2020 https://tc.copernicus.org/articles/14/4603/2020/ |
op_doi |
https://doi.org/10.5194/tc-14-4603-2020 |
container_title |
The Cryosphere |
container_volume |
14 |
container_issue |
12 |
container_start_page |
4603 |
op_container_end_page |
4609 |
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1766019904766476288 |