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dc.contributor.author
Ochwat, Naomi E.
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Scambos, Ted A.
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Banwell, Alison
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Anderson, Robert S.
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Maclennan, Michelle
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Picard, Ghislain
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Shates, Julia
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Marinsek, Sebastián
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Margonari, Liliana Sofia
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Truffer, Martin
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Pettit, Erin
dc.date.available
2024-05-10T15:07:23Z
dc.date.issued
2023-06
dc.identifier.citation
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
dc.identifier.uri
http://hdl.handle.net/11336/235140
dc.description.abstract
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).
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Copernicus Publications
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by/2.5/ar/
dc.subject
Triggers
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Glacier response
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Otras Ciencias de la Tierra y relacionadas con el Medio Ambiente
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
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CIENCIAS NATURALES Y EXACTAS
dc.title
Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2024-04-03T10:19:27Z
dc.identifier.eissn
1994-0424
dc.journal.volume
18
dc.journal.number
4
dc.journal.pagination
1709-1731
dc.journal.pais
Alemania
dc.journal.ciudad
Göttingen
dc.description.fil
Fil: Ochwat, Naomi E.. State University of Colorado at Boulder; Estados Unidos
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Fil: Scambos, Ted A.. State University of Colorado at Boulder; Estados Unidos
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Fil: Banwell, Alison. State University of Colorado at Boulder; Estados Unidos
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Fil: Anderson, Robert S.. State University of Colorado at Boulder; Estados Unidos
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Fil: Maclennan, Michelle. State University of Colorado at Boulder; Estados Unidos
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Fil: Picard, Ghislain. Universite Grenoble Alpes.; Francia
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Fil: Shates, Julia. University of Wisconsin; Estados Unidos
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Fil: Marinsek, Sebastián. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
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Fil: Margonari, Liliana Sofia. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina. Universidad de Chile. Facultad de Ciencias Físicas y Matemáticas. Departamento de Geología; Chile
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Fil: Truffer, Martin. University of Alaska; Estados Unidos
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Fil: Pettit, Erin. State University of Oregon; Estados Unidos
dc.journal.title
Cryosphere
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://tc.copernicus.org/articles/18/1709/2024/tc-18-1709-2024-discussion.html
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.5194/tc-18-1709-2024
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