Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response

Autores
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
Año de publicación
2023
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
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 de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
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
Fil: Truffer, Martin. University of Alaska; Estados Unidos
Fil: Pettit, Erin. State University of Oregon; Estados Unidos
Materia
Triggers
Glacier response
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/235140
Acceder
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repository_id_str 3498
network_name_str CONICET Digital (CONICET)
spelling Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier responseOchwat, Naomi E.Scambos, Ted A.Banwell, AlisonAnderson, Robert S.Maclennan, MichellePicard, GhislainShates, JuliaMarinsek, SebastiánMargonari, Liliana SofiaTruffer, MartinPettit, ErinTriggersGlacier responsehttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1In 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 UnidosFil: Scambos, Ted A.. State University of Colorado at Boulder; Estados UnidosFil: Banwell, Alison. State University of Colorado at Boulder; Estados UnidosFil: Anderson, Robert S.. State University of Colorado at Boulder; Estados UnidosFil: Maclennan, Michelle. State University of Colorado at Boulder; Estados UnidosFil: Picard, Ghislain. Universite Grenoble Alpes.; FranciaFil: Shates, Julia. University of Wisconsin; Estados UnidosFil: Marinsek, Sebastián. Ministerio de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; ArgentinaFil: 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; ChileFil: Truffer, Martin. University of Alaska; Estados UnidosFil: Pettit, Erin. State University of Oregon; Estados UnidosCopernicus Publications2023-06info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/235140Ochwat, 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; 1709-17311994-0424CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://tc.copernicus.org/articles/18/1709/2024/tc-18-1709-2024-discussion.htmlinfo:eu-repo/semantics/altIdentifier/doi/10.5194/tc-18-1709-2024info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:50:14Zoai:ri.conicet.gov.ar:11336/235140instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:50:14.774CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response
title Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response
spellingShingle Triggers of the 2022 Larsen B multi-year landfast sea ice breakout and initial glacier response
Ochwat, Naomi E.
Triggers
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
dc.creator.none.fl_str_mv 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 Ochwat, Naomi E.
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_role author
author2 Scambos, Ted A.
Banwell, Alison
Anderson, Robert S.
Maclennan, Michelle
Picard, Ghislain
Shates, Julia
Marinsek, Sebastián
Margonari, Liliana Sofia
Truffer, Martin
Pettit, Erin
author2_role author
author
author
author
author
author
author
author
author
author
dc.subject.none.fl_str_mv Triggers
Glacier response
topic Triggers
Glacier response
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv 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 de Relaciones Exteriores, Comercio Interno y Culto. Dirección Nacional del Antártico. Instituto Antártico Argentino; Argentina
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
Fil: Truffer, Martin. University of Alaska; Estados Unidos
Fil: Pettit, Erin. State University of Oregon; Estados Unidos
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).
publishDate 2023
dc.date.none.fl_str_mv 2023-06
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv 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
url http://hdl.handle.net/11336/235140
identifier_str_mv 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
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 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
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
application/pdf
dc.publisher.none.fl_str_mv Copernicus Publications
publisher.none.fl_str_mv Copernicus Publications
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 13.070432

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