Predominant Sea Ice Fracture Zones Around Antarctica and Their Relation to Bathymetric Features
Sea ice is of substantial importance for the Southern Ocean, as it insulates the relatively warm ocean from the cold atmosphere. Due to mechanical stress induced by wind and ocean currents, sea ice leads occur, which are characterized by open water and thin ice causing an increase of energy and mois...
Published in: | Geophysical Research Letters |
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Main Authors: | , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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HAL CCSD
2019
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Online Access: | https://hal.sorbonne-universite.fr/hal-02402416 https://hal.sorbonne-universite.fr/hal-02402416/document https://hal.sorbonne-universite.fr/hal-02402416/file/Reiser_et_al-2019-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2019GL084624 |
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ftccsdartic:oai:HAL:hal-02402416v1 |
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Open Polar |
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Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
MODIS Antarctic sea ice leads bathymetry tides ocean currents [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
MODIS Antarctic sea ice leads bathymetry tides ocean currents [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Reiser, F. Willmes, S. Hausmann, Ute Heinemann, G. Predominant Sea Ice Fracture Zones Around Antarctica and Their Relation to Bathymetric Features |
topic_facet |
MODIS Antarctic sea ice leads bathymetry tides ocean currents [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
Sea ice is of substantial importance for the Southern Ocean, as it insulates the relatively warm ocean from the cold atmosphere. Due to mechanical stress induced by wind and ocean currents, sea ice leads occur, which are characterized by open water and thin ice causing an increase of energy and moisture fluxes between ocean and atmosphere. Furthermore, they contribute to the ice production and provide a habitat for animals. Thus, it is important to gain information about the temporal and spatial distribution of leads on a circum-Antarctic scale. So far, no operational data set exists, which provides such information. We use thermal satellite imagery from the Moderate Resolution Imaging Spectroradiometer to derive the predominant lead patterns for 2003-2018, April-September. This study provides first results for the long-term average lead frequencies in the Southern Ocean and discusses possible links to ocean currents, tides, and the bathymetry. Plain Language Summary The polar regions are strongly influenced by sea ice, which covers large areas of the ocean's surface. Interacting with the atmosphere and the ocean, sea ice is a very dynamic surface with a large temporal and spatial variability. Under the forcing of winds and ocean currents, sea ice is subject to deformation processes causing cracks (leads) in the ice. The observation of these leads is the aim of this study since they are an important feature. For instance, open water can be found in these cracks, which enables the warm ocean (−1.7 • C) to lose energy to the cold atmosphere. Also, sea ice forms a habitat for animals. In this study, the focus is on the Southern Hemisphere where sea ice surrounds the Antarctic continent. For the winter months, we use thermal infrared satellite images where leads appear as warm, almost linear features compared to the cold ice cover. By using computer algorithms, the cracks are detected automatically. This is the first study that shows these features in the Southern Ocean. Leads not only exist close to the coastline ... |
author2 |
Universität Trier Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU) European Project: 637770,H2020,ERC-2014-STG,WAPITI(2015) |
format |
Article in Journal/Newspaper |
author |
Reiser, F. Willmes, S. Hausmann, Ute Heinemann, G. |
author_facet |
Reiser, F. Willmes, S. Hausmann, Ute Heinemann, G. |
author_sort |
Reiser, F. |
title |
Predominant Sea Ice Fracture Zones Around Antarctica and Their Relation to Bathymetric Features |
title_short |
Predominant Sea Ice Fracture Zones Around Antarctica and Their Relation to Bathymetric Features |
title_full |
Predominant Sea Ice Fracture Zones Around Antarctica and Their Relation to Bathymetric Features |
title_fullStr |
Predominant Sea Ice Fracture Zones Around Antarctica and Their Relation to Bathymetric Features |
title_full_unstemmed |
Predominant Sea Ice Fracture Zones Around Antarctica and Their Relation to Bathymetric Features |
title_sort |
predominant sea ice fracture zones around antarctica and their relation to bathymetric features |
publisher |
HAL CCSD |
publishDate |
2019 |
url |
https://hal.sorbonne-universite.fr/hal-02402416 https://hal.sorbonne-universite.fr/hal-02402416/document https://hal.sorbonne-universite.fr/hal-02402416/file/Reiser_et_al-2019-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2019GL084624 |
geographic |
Antarctic Southern Ocean The Antarctic |
geographic_facet |
Antarctic Southern Ocean The Antarctic |
genre |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctica Sea ice Southern Ocean |
op_source |
ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.sorbonne-universite.fr/hal-02402416 Geophysical Research Letters, American Geophysical Union, 2019, 46 (21), pp.12117-12124. ⟨10.1029/2019GL084624⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2019GL084624 info:eu-repo/grantAgreement//637770/EU/Water-mass transformation and Pathways In The Weddell Sea: uncovering the dynamics of a global climate chokepoint from In-situ measurements/WAPITI hal-02402416 https://hal.sorbonne-universite.fr/hal-02402416 https://hal.sorbonne-universite.fr/hal-02402416/document https://hal.sorbonne-universite.fr/hal-02402416/file/Reiser_et_al-2019-Geophysical_Research_Letters.pdf doi:10.1029/2019GL084624 WOS: 000496009200001 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2019GL084624 |
container_title |
Geophysical Research Letters |
container_volume |
46 |
container_issue |
21 |
container_start_page |
12117 |
op_container_end_page |
12124 |
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1766249987638820864 |
spelling |
ftccsdartic:oai:HAL:hal-02402416v1 2023-05-15T13:48:56+02:00 Predominant Sea Ice Fracture Zones Around Antarctica and Their Relation to Bathymetric Features Reiser, F. Willmes, S. Hausmann, Ute Heinemann, G. Universität Trier Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN) Institut Pierre-Simon-Laplace (IPSL (FR_636)) École normale supérieure - Paris (ENS Paris) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris) 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)-École polytechnique (X)-Centre National d'Études Spatiales Toulouse (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU) European Project: 637770,H2020,ERC-2014-STG,WAPITI(2015) 2019-11-10 https://hal.sorbonne-universite.fr/hal-02402416 https://hal.sorbonne-universite.fr/hal-02402416/document https://hal.sorbonne-universite.fr/hal-02402416/file/Reiser_et_al-2019-Geophysical_Research_Letters.pdf https://doi.org/10.1029/2019GL084624 en eng HAL CCSD American Geophysical Union info:eu-repo/semantics/altIdentifier/doi/10.1029/2019GL084624 info:eu-repo/grantAgreement//637770/EU/Water-mass transformation and Pathways In The Weddell Sea: uncovering the dynamics of a global climate chokepoint from In-situ measurements/WAPITI hal-02402416 https://hal.sorbonne-universite.fr/hal-02402416 https://hal.sorbonne-universite.fr/hal-02402416/document https://hal.sorbonne-universite.fr/hal-02402416/file/Reiser_et_al-2019-Geophysical_Research_Letters.pdf doi:10.1029/2019GL084624 WOS: 000496009200001 info:eu-repo/semantics/OpenAccess ISSN: 0094-8276 EISSN: 1944-8007 Geophysical Research Letters https://hal.sorbonne-universite.fr/hal-02402416 Geophysical Research Letters, American Geophysical Union, 2019, 46 (21), pp.12117-12124. ⟨10.1029/2019GL084624⟩ MODIS Antarctic sea ice leads bathymetry tides ocean currents [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2019 ftccsdartic https://doi.org/10.1029/2019GL084624 2021-12-19T01:36:41Z Sea ice is of substantial importance for the Southern Ocean, as it insulates the relatively warm ocean from the cold atmosphere. Due to mechanical stress induced by wind and ocean currents, sea ice leads occur, which are characterized by open water and thin ice causing an increase of energy and moisture fluxes between ocean and atmosphere. Furthermore, they contribute to the ice production and provide a habitat for animals. Thus, it is important to gain information about the temporal and spatial distribution of leads on a circum-Antarctic scale. So far, no operational data set exists, which provides such information. We use thermal satellite imagery from the Moderate Resolution Imaging Spectroradiometer to derive the predominant lead patterns for 2003-2018, April-September. This study provides first results for the long-term average lead frequencies in the Southern Ocean and discusses possible links to ocean currents, tides, and the bathymetry. Plain Language Summary The polar regions are strongly influenced by sea ice, which covers large areas of the ocean's surface. Interacting with the atmosphere and the ocean, sea ice is a very dynamic surface with a large temporal and spatial variability. Under the forcing of winds and ocean currents, sea ice is subject to deformation processes causing cracks (leads) in the ice. The observation of these leads is the aim of this study since they are an important feature. For instance, open water can be found in these cracks, which enables the warm ocean (−1.7 • C) to lose energy to the cold atmosphere. Also, sea ice forms a habitat for animals. In this study, the focus is on the Southern Hemisphere where sea ice surrounds the Antarctic continent. For the winter months, we use thermal infrared satellite images where leads appear as warm, almost linear features compared to the cold ice cover. By using computer algorithms, the cracks are detected automatically. This is the first study that shows these features in the Southern Ocean. Leads not only exist close to the coastline ... Article in Journal/Newspaper Antarc* Antarctic Antarctica Sea ice Southern Ocean Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Southern Ocean The Antarctic Geophysical Research Letters 46 21 12117 12124 |