A note on the intraseasonal variability in an Antarctic polynia: Prior to and after the Mertz Glacier calving
International audience During winter, thin sea ice is formed in coastal polynias, areas of open-water within a sea ice pack and important sites of dense shelf water formation. In the Mertz Glacier polynia (138°E-147°E, East Antarctica), we examined the effects of an extreme calving event, the last M...
Published in: | Journal of Marine Systems |
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Main Authors: | , , , |
Other Authors: | , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2014
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Online Access: | https://hal.science/hal-00939062 https://doi.org/10.1016/J.JMARSYS.2013.06.006 |
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Open Polar |
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HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) |
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ftceafr |
language |
English |
topic |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
spellingShingle |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] Dragon, Anne-Cécile Houssais, Marie-Noëlle Herbaut, Christophe Charrassin, Jean-Benoit A note on the intraseasonal variability in an Antarctic polynia: Prior to and after the Mertz Glacier calving |
topic_facet |
[PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] |
description |
International audience During winter, thin sea ice is formed in coastal polynias, areas of open-water within a sea ice pack and important sites of dense shelf water formation. In the Mertz Glacier polynia (138°E-147°E, East Antarctica), we examined the effects of an extreme calving event, the last Mertz glacier calving, on the regional sea ice distribution. The high-frequency variability of sea ice concentration was studied for years 1992 to 2011 from passive microwave satellite data with fine spatial (6.25 km and 12.5 km) and temporal (1 day) resolutions. Our results showed that the last calving of the Mertz glacier tongue in February 2010 greatly modified the size and shape of the polynia with a significant westward shift in the regional ice regimes. We also identified a post-calving transition state characterised by a 70%-decrease in polynia area from the pre-calving mean. In the eastern part of the study area, our findings are in agreement with other studies predicting an important decrease in polynia activity. In the western part, where the main polynia activity has shifted after the calving, the new sea ice distribution is expected to have a major impact on local sea ice production, dense shelf water sinking, and potentially the regional thermohaline circulation. With extreme climatic events predicted to occur more frequently, long-term monitoring of the regional icescape could be used to evaluate the vulnerability of Antarctic physical processes and related ecosystems. |
author2 |
Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Variabilité de l'Océan et de la Glace de mer (VOG) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Processus de couplage à Petite Echelle, Ecosystèmes et Prédateurs Supérieurs (PEPS) |
format |
Article in Journal/Newspaper |
author |
Dragon, Anne-Cécile Houssais, Marie-Noëlle Herbaut, Christophe Charrassin, Jean-Benoit |
author_facet |
Dragon, Anne-Cécile Houssais, Marie-Noëlle Herbaut, Christophe Charrassin, Jean-Benoit |
author_sort |
Dragon, Anne-Cécile |
title |
A note on the intraseasonal variability in an Antarctic polynia: Prior to and after the Mertz Glacier calving |
title_short |
A note on the intraseasonal variability in an Antarctic polynia: Prior to and after the Mertz Glacier calving |
title_full |
A note on the intraseasonal variability in an Antarctic polynia: Prior to and after the Mertz Glacier calving |
title_fullStr |
A note on the intraseasonal variability in an Antarctic polynia: Prior to and after the Mertz Glacier calving |
title_full_unstemmed |
A note on the intraseasonal variability in an Antarctic polynia: Prior to and after the Mertz Glacier calving |
title_sort |
note on the intraseasonal variability in an antarctic polynia: prior to and after the mertz glacier calving |
publisher |
HAL CCSD |
publishDate |
2014 |
url |
https://hal.science/hal-00939062 https://doi.org/10.1016/J.JMARSYS.2013.06.006 |
genre |
Antarc* Antarctic Antarctica East Antarctica ice pack Mertz Glacier Sea ice |
genre_facet |
Antarc* Antarctic Antarctica East Antarctica ice pack Mertz Glacier Sea ice |
op_source |
ISSN: 0924-7963 Journal of Marine Systems https://hal.science/hal-00939062 Journal of Marine Systems, 2014, 130, pp.46-55. ⟨10.1016/J.JMARSYS.2013.06.006⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1016/J.JMARSYS.2013.06.006 hal-00939062 https://hal.science/hal-00939062 BIBCODE: 2014JMS.130.46D doi:10.1016/J.JMARSYS.2013.06.006 |
op_doi |
https://doi.org/10.1016/J.JMARSYS.2013.06.006 |
container_title |
Journal of Marine Systems |
container_volume |
130 |
container_start_page |
46 |
op_container_end_page |
55 |
_version_ |
1799469396570144768 |
spelling |
ftceafr:oai:HAL:hal-00939062v1 2024-05-19T07:31:32+00:00 A note on the intraseasonal variability in an Antarctic polynia: Prior to and after the Mertz Glacier calving Dragon, Anne-Cécile Houssais, Marie-Noëlle Herbaut, Christophe Charrassin, Jean-Benoit Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-École normale supérieure - Paris (ENS-PSL) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) Variabilité de l'Océan et de la Glace de mer (VOG) Université Paris Sciences et Lettres (PSL)-Université Paris Sciences et Lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Université Pierre et Marie Curie - Paris 6 (UPMC)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)) Processus de couplage à Petite Echelle, Ecosystèmes et Prédateurs Supérieurs (PEPS) 2014-02 https://hal.science/hal-00939062 https://doi.org/10.1016/J.JMARSYS.2013.06.006 en eng HAL CCSD Elsevier info:eu-repo/semantics/altIdentifier/doi/10.1016/J.JMARSYS.2013.06.006 hal-00939062 https://hal.science/hal-00939062 BIBCODE: 2014JMS.130.46D doi:10.1016/J.JMARSYS.2013.06.006 ISSN: 0924-7963 Journal of Marine Systems https://hal.science/hal-00939062 Journal of Marine Systems, 2014, 130, pp.46-55. ⟨10.1016/J.JMARSYS.2013.06.006⟩ [PHYS.PHYS.PHYS-GEO-PH]Physics [physics]/Physics [physics]/Geophysics [physics.geo-ph] [SDU.STU.GP]Sciences of the Universe [physics]/Earth Sciences/Geophysics [physics.geo-ph] info:eu-repo/semantics/article Journal articles 2014 ftceafr https://doi.org/10.1016/J.JMARSYS.2013.06.006 2024-04-25T01:14:23Z International audience During winter, thin sea ice is formed in coastal polynias, areas of open-water within a sea ice pack and important sites of dense shelf water formation. In the Mertz Glacier polynia (138°E-147°E, East Antarctica), we examined the effects of an extreme calving event, the last Mertz glacier calving, on the regional sea ice distribution. The high-frequency variability of sea ice concentration was studied for years 1992 to 2011 from passive microwave satellite data with fine spatial (6.25 km and 12.5 km) and temporal (1 day) resolutions. Our results showed that the last calving of the Mertz glacier tongue in February 2010 greatly modified the size and shape of the polynia with a significant westward shift in the regional ice regimes. We also identified a post-calving transition state characterised by a 70%-decrease in polynia area from the pre-calving mean. In the eastern part of the study area, our findings are in agreement with other studies predicting an important decrease in polynia activity. In the western part, where the main polynia activity has shifted after the calving, the new sea ice distribution is expected to have a major impact on local sea ice production, dense shelf water sinking, and potentially the regional thermohaline circulation. With extreme climatic events predicted to occur more frequently, long-term monitoring of the regional icescape could be used to evaluate the vulnerability of Antarctic physical processes and related ecosystems. Article in Journal/Newspaper Antarc* Antarctic Antarctica East Antarctica ice pack Mertz Glacier Sea ice HAL-CEA (Commissariat à l'énergie atomique et aux énergies alternatives) Journal of Marine Systems 130 46 55 |