Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response
In late March 2011, landfast sea ice (hereafter, “fast ice”) formed in the northern Larsen B embayment and persisted continuously as multi-year fast ice until January 2022. In the 11 years of fast-ice presence, the northern Larsen B glaciers slowed significantly, thickened in their lower reaches, an...
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ftconicet:oai:ri.conicet.gov.ar:11336/235140 2024-06-23T07:53:51+00:00 Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response Ochwat, Naomi E. Scambos, Ted A. Banwell, Alison Anderson, Robert S. Maclennan, Michelle Picard, Ghislain Shates, Julia Marinsek, Sebastián Margonari, Liliana Sofia Truffer, Martin Pettit, Erin application/pdf http://hdl.handle.net/11336/235140 eng eng Copernicus Publications info:eu-repo/semantics/altIdentifier/url/https://tc.copernicus.org/articles/18/1709/2024/tc-18-1709-2024-discussion.html info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-18-1709-2024 http://hdl.handle.net/11336/235140 Ochwat, Naomi E.; Scambos, Ted A.; Banwell, Alison; Anderson, Robert S.; Maclennan, Michelle; et al.; Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response; Copernicus Publications; Cryosphere; 18; 4; 6-2023; 1709-1731 1994-0424 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ Triggers Glacier response https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.5194/tc-18-1709-2024 2024-05-27T23:56:36Z In late March 2011, landfast sea ice (hereafter, “fast ice”) formed in the northern Larsen B embayment and persisted continuously as multi-year fast ice until January 2022. In the 11 years of fast-ice presence, the northern Larsen B glaciers slowed significantly, thickened in their lower reaches, and developed extensive mélange areas, leading to the formation of ice tongues that extended up to 16 km from the 2011 ice fronts. In situ measurements of ice speed on adjacent ice shelf areas spanning 2011 to 2017 show that the fast ice provided significant resistive stress to ice flow. Fast-ice breakout began in late January 2022 and was closely followed by retreat and breakup of both the fast-ice mélange and the glacier ice tongues. We investigate the probable triggers for the loss of fast ice and document the initial upstream glacier responses. The fast-ice breakup is linked to the arrival of a strong ocean swell event ( > 1.5 m amplitude; wave period waves > 5 s) originating from the northeast. Wave propagation to the ice front was facilitated by a 12-year low in sea ice concentration in the northwestern Weddell Sea, creating a near-ice-free corridor to the open ocean. Remote sensing data in the months following the fast-ice breakout reveals an initial ice flow speed increase (> 2-fold), elevation loss (9 to 11 m), and rapid calving of floating and grounded ice for the three main embayment glaciers Crane (11 km), Hektoria (25 km), and Green (18 km). Fil: Ochwat, Naomi E. State University of Colorado at Boulder; Estados Unidos Fil: Scambos, Ted A. State University of Colorado at Boulder; Estados Unidos Fil: Banwell, Alison. State University of Colorado at Boulder; Estados Unidos Fil: Anderson, Robert S. State University of Colorado at Boulder; Estados Unidos Fil: Maclennan, Michelle. State University of Colorado at Boulder; Estados Unidos Fil: Picard, Ghislain. Universite Grenoble Alpes.; Francia Fil: Shates, Julia. University of Wisconsin; Estados Unidos Fil: Marinsek, Sebastián. Ministerio ... Article in Journal/Newspaper Ice Shelf Sea ice Weddell Sea CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Weddell Weddell Sea The Cryosphere 18 4 1709 1731 |
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Open Polar |
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CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Triggers Glacier response https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Triggers Glacier response https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Ochwat, Naomi E. Scambos, Ted A. Banwell, Alison Anderson, Robert S. Maclennan, Michelle Picard, Ghislain Shates, Julia Marinsek, Sebastián Margonari, Liliana Sofia Truffer, Martin Pettit, Erin Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response |
topic_facet |
Triggers Glacier response https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
In late March 2011, landfast sea ice (hereafter, “fast ice”) formed in the northern Larsen B embayment and persisted continuously as multi-year fast ice until January 2022. In the 11 years of fast-ice presence, the northern Larsen B glaciers slowed significantly, thickened in their lower reaches, and developed extensive mélange areas, leading to the formation of ice tongues that extended up to 16 km from the 2011 ice fronts. In situ measurements of ice speed on adjacent ice shelf areas spanning 2011 to 2017 show that the fast ice provided significant resistive stress to ice flow. Fast-ice breakout began in late January 2022 and was closely followed by retreat and breakup of both the fast-ice mélange and the glacier ice tongues. We investigate the probable triggers for the loss of fast ice and document the initial upstream glacier responses. The fast-ice breakup is linked to the arrival of a strong ocean swell event ( > 1.5 m amplitude; wave period waves > 5 s) originating from the northeast. Wave propagation to the ice front was facilitated by a 12-year low in sea ice concentration in the northwestern Weddell Sea, creating a near-ice-free corridor to the open ocean. Remote sensing data in the months following the fast-ice breakout reveals an initial ice flow speed increase (> 2-fold), elevation loss (9 to 11 m), and rapid calving of floating and grounded ice for the three main embayment glaciers Crane (11 km), Hektoria (25 km), and Green (18 km). Fil: Ochwat, Naomi E. State University of Colorado at Boulder; Estados Unidos Fil: Scambos, Ted A. State University of Colorado at Boulder; Estados Unidos Fil: Banwell, Alison. State University of Colorado at Boulder; Estados Unidos Fil: Anderson, Robert S. State University of Colorado at Boulder; Estados Unidos Fil: Maclennan, Michelle. State University of Colorado at Boulder; Estados Unidos Fil: Picard, Ghislain. Universite Grenoble Alpes.; Francia Fil: Shates, Julia. University of Wisconsin; Estados Unidos Fil: Marinsek, Sebastián. Ministerio ... |
format |
Article in Journal/Newspaper |
author |
Ochwat, Naomi E. Scambos, Ted A. Banwell, Alison Anderson, Robert S. Maclennan, Michelle Picard, Ghislain Shates, Julia Marinsek, Sebastián Margonari, Liliana Sofia Truffer, Martin Pettit, Erin |
author_facet |
Ochwat, Naomi E. Scambos, Ted A. Banwell, Alison Anderson, Robert S. Maclennan, Michelle Picard, Ghislain Shates, Julia Marinsek, Sebastián Margonari, Liliana Sofia Truffer, Martin Pettit, Erin |
author_sort |
Ochwat, Naomi E. |
title |
Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response |
title_short |
Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response |
title_full |
Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response |
title_fullStr |
Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response |
title_full_unstemmed |
Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response |
title_sort |
triggers of the 2022 larsen b multi-year landfast sea ice breakout and initial glacier response |
publisher |
Copernicus Publications |
url |
http://hdl.handle.net/11336/235140 |
geographic |
Weddell Weddell Sea |
geographic_facet |
Weddell Weddell Sea |
genre |
Ice Shelf Sea ice Weddell Sea |
genre_facet |
Ice Shelf Sea ice Weddell Sea |
op_relation |
info:eu-repo/semantics/altIdentifier/url/https://tc.copernicus.org/articles/18/1709/2024/tc-18-1709-2024-discussion.html info:eu-repo/semantics/altIdentifier/doi/10.5194/tc-18-1709-2024 http://hdl.handle.net/11336/235140 Ochwat, Naomi E.; Scambos, Ted A.; Banwell, Alison; Anderson, Robert S.; Maclennan, Michelle; et al.; Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response; Copernicus Publications; Cryosphere; 18; 4; 6-2023; 1709-1731 1994-0424 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by/2.5/ar/ |
op_doi |
https://doi.org/10.5194/tc-18-1709-2024 |
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The Cryosphere |
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18 |
container_issue |
4 |
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1709 |
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1731 |
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1802645702570934272 |