Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds
Around large parts of West Antarctica and in Wilkes Land, East Antarctica, increased wind-forced intrusions of modified Circumpolar Deep Water (mCDW) onto the continental shelf have been associated with mass loss over the last few decades. Despite considerable seasonal variability, observations in 2...
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ftdoajarticles:oai:doaj.org/article:ce80afe5b34549b598ca3ee611dd2702 2023-05-15T14:00:44+02:00 Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds B. W. J. Miles C. R. Stokes A. Jenkins J. R. Jordan S. S. R. Jamieson G. H. Gudmundsson 2023-02-01T00:00:00Z https://doi.org/10.5194/tc-17-445-2023 https://doaj.org/article/ce80afe5b34549b598ca3ee611dd2702 EN eng Copernicus Publications https://tc.copernicus.org/articles/17/445/2023/tc-17-445-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-445-2023 1994-0416 1994-0424 https://doaj.org/article/ce80afe5b34549b598ca3ee611dd2702 The Cryosphere, Vol 17, Pp 445-456 (2023) Environmental sciences GE1-350 Geology QE1-996.5 article 2023 ftdoajarticles https://doi.org/10.5194/tc-17-445-2023 2023-02-05T01:30:37Z Around large parts of West Antarctica and in Wilkes Land, East Antarctica, increased wind-forced intrusions of modified Circumpolar Deep Water (mCDW) onto the continental shelf have been associated with mass loss over the last few decades. Despite considerable seasonal variability, observations in 2018 have also confirmed relatively high basal melt rates of up to 16 m a −1 underneath the Shirase ice tongue in Enderby Land, East Antarctica. These high basal melt rates are also caused by intrusions of mCDW onto the continental shelf, but the catchment of Shirase Glacier has been gaining mass, a trend often attributed to increased precipitation. Here, we document the dynamical ocean-driven slowdown, ice surface thickening and grounding line advance of Shirase Glacier in response to strengthening easterly winds that reduce mCDW inflow and decrease basal melt rates. Our findings are significant because they demonstrate that warm ice shelf cavity regimes are not universally associated with glacier acceleration and mass loss in Antarctica, and they highlight the overlooked role of the impact of easterly winds in the recent mass gain of the Shirase Glacier catchment. Article in Journal/Newspaper Antarc* Antarctica East Antarctica Enderby Land Ice Shelf Shirase Glacier The Cryosphere West Antarctica Wilkes Land Directory of Open Access Journals: DOAJ Articles East Antarctica West Antarctica Wilkes Land ENVELOPE(120.000,120.000,-69.000,-69.000) Shirase Glacier ENVELOPE(39.000,39.000,-70.333,-70.333) The Cryosphere 17 1 445 456 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Environmental sciences GE1-350 Geology QE1-996.5 |
spellingShingle |
Environmental sciences GE1-350 Geology QE1-996.5 B. W. J. Miles C. R. Stokes A. Jenkins J. R. Jordan S. S. R. Jamieson G. H. Gudmundsson Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
topic_facet |
Environmental sciences GE1-350 Geology QE1-996.5 |
description |
Around large parts of West Antarctica and in Wilkes Land, East Antarctica, increased wind-forced intrusions of modified Circumpolar Deep Water (mCDW) onto the continental shelf have been associated with mass loss over the last few decades. Despite considerable seasonal variability, observations in 2018 have also confirmed relatively high basal melt rates of up to 16 m a −1 underneath the Shirase ice tongue in Enderby Land, East Antarctica. These high basal melt rates are also caused by intrusions of mCDW onto the continental shelf, but the catchment of Shirase Glacier has been gaining mass, a trend often attributed to increased precipitation. Here, we document the dynamical ocean-driven slowdown, ice surface thickening and grounding line advance of Shirase Glacier in response to strengthening easterly winds that reduce mCDW inflow and decrease basal melt rates. Our findings are significant because they demonstrate that warm ice shelf cavity regimes are not universally associated with glacier acceleration and mass loss in Antarctica, and they highlight the overlooked role of the impact of easterly winds in the recent mass gain of the Shirase Glacier catchment. |
format |
Article in Journal/Newspaper |
author |
B. W. J. Miles C. R. Stokes A. Jenkins J. R. Jordan S. S. R. Jamieson G. H. Gudmundsson |
author_facet |
B. W. J. Miles C. R. Stokes A. Jenkins J. R. Jordan S. S. R. Jamieson G. H. Gudmundsson |
author_sort |
B. W. J. Miles |
title |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
title_short |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
title_full |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
title_fullStr |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
title_full_unstemmed |
Slowdown of Shirase Glacier, East Antarctica, caused by strengthening alongshore winds |
title_sort |
slowdown of shirase glacier, east antarctica, caused by strengthening alongshore winds |
publisher |
Copernicus Publications |
publishDate |
2023 |
url |
https://doi.org/10.5194/tc-17-445-2023 https://doaj.org/article/ce80afe5b34549b598ca3ee611dd2702 |
long_lat |
ENVELOPE(120.000,120.000,-69.000,-69.000) ENVELOPE(39.000,39.000,-70.333,-70.333) |
geographic |
East Antarctica West Antarctica Wilkes Land Shirase Glacier |
geographic_facet |
East Antarctica West Antarctica Wilkes Land Shirase Glacier |
genre |
Antarc* Antarctica East Antarctica Enderby Land Ice Shelf Shirase Glacier The Cryosphere West Antarctica Wilkes Land |
genre_facet |
Antarc* Antarctica East Antarctica Enderby Land Ice Shelf Shirase Glacier The Cryosphere West Antarctica Wilkes Land |
op_source |
The Cryosphere, Vol 17, Pp 445-456 (2023) |
op_relation |
https://tc.copernicus.org/articles/17/445/2023/tc-17-445-2023.pdf https://doaj.org/toc/1994-0416 https://doaj.org/toc/1994-0424 doi:10.5194/tc-17-445-2023 1994-0416 1994-0424 https://doaj.org/article/ce80afe5b34549b598ca3ee611dd2702 |
op_doi |
https://doi.org/10.5194/tc-17-445-2023 |
container_title |
The Cryosphere |
container_volume |
17 |
container_issue |
1 |
container_start_page |
445 |
op_container_end_page |
456 |
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1766270065089445888 |