Simulating pancake and frazil ice growth in the Weddell Sea: A process model from freezing to consolidation
International audience Processes controlling the formation and transformation of frazil to pancake ice are examined using data from an array of drifting buoys deployed at the advancing ice edge in the Weddell Sea. A simple thermodynamic model is coupled to the buoy dynamics and to an ice redistribut...
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Online Access: | https://hal.archives-ouvertes.fr/hal-03505009 https://hal.archives-ouvertes.fr/hal-03505009/document https://hal.archives-ouvertes.fr/hal-03505009/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Doble%20-%20Simulating%20pancake%20and%20frazil%20ice%20growth%20in%20the%20Weddell%20Sea%20A.pdf https://doi.org/10.1029/2008JC004935 |
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ftccsdartic:oai:HAL:hal-03505009v1 2023-05-15T13:32:49+02:00 Simulating pancake and frazil ice growth in the Weddell Sea: A process model from freezing to consolidation Doble, Martin J. Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) 2009 https://hal.archives-ouvertes.fr/hal-03505009 https://hal.archives-ouvertes.fr/hal-03505009/document https://hal.archives-ouvertes.fr/hal-03505009/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Doble%20-%20Simulating%20pancake%20and%20frazil%20ice%20growth%20in%20the%20Weddell%20Sea%20A.pdf https://doi.org/10.1029/2008JC004935 en eng HAL CCSD info:eu-repo/semantics/altIdentifier/doi/10.1029/2008JC004935 hal-03505009 https://hal.archives-ouvertes.fr/hal-03505009 https://hal.archives-ouvertes.fr/hal-03505009/document https://hal.archives-ouvertes.fr/hal-03505009/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Doble%20-%20Simulating%20pancake%20and%20frazil%20ice%20growth%20in%20the%20Weddell%20Sea%20A.pdf doi:10.1029/2008JC004935 http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS https://hal.archives-ouvertes.fr/hal-03505009 JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2009, 114, ⟨10.1029/2008JC004935⟩ [SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography info:eu-repo/semantics/article Journal articles 2009 ftccsdartic https://doi.org/10.1029/2008JC004935 2022-01-01T23:22:10Z International audience Processes controlling the formation and transformation of frazil to pancake ice are examined using data from an array of drifting buoys deployed at the advancing ice edge in the Weddell Sea. A simple thermodynamic model is coupled to the buoy dynamics and to an ice redistribution model to determine the influence of deformation, thermodynamics, and mechanical scavenging, incorporating frazil crystals from the surrounding slick into the pancakes, on the partitioning of ice volume between frazil and pancakes. Ice production was examined from the time the buoys were deployed until the frazil/pancake cover consolidated into the more familiar pack ice. The model reproduced the expected ice cover thickness at consolidation (60 cm). Rafting was the dominant contribution to thickening in the region owing to large-scale compression of the initial area by northerly winds from passing low-pressure weather systems, which are rather typical in the region. High-resolution positional forcing from the buoys (20-min intervals) doubled the contribution of mechanical scavenging to final pancake thickness compared to the coarser (2-h) result, owing to the larger path length that the pancakes traverse through the frazil slick, and produced a significantly larger volume of ice in the pancake phase. The ice cover generated at consolidation was approximately twice as thick as would have formed by the more familiar congelation ice growth under the same forcing, reinforcing the importance of correctly parameterizing the early stages of ice formation in the Antarctic. The study highlighted uncertainties in the effect of the frazil/pancake cover on ocean-atmosphere heat exchange, both in terms of the area contributing to ice production and the effect on turbulent exchange coefficients. Further work placing the empirical parameters into a more constrained physical framework and introducing wave properties is suggested. Article in Journal/Newspaper Antarc* Antarctic Weddell Sea Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Antarctic Pancake ENVELOPE(-55.815,-55.815,52.600,52.600) The Antarctic Weddell Weddell Sea Journal of Geophysical Research 114 C9 |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
English |
topic |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
spellingShingle |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography Doble, Martin J. Simulating pancake and frazil ice growth in the Weddell Sea: A process model from freezing to consolidation |
topic_facet |
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography |
description |
International audience Processes controlling the formation and transformation of frazil to pancake ice are examined using data from an array of drifting buoys deployed at the advancing ice edge in the Weddell Sea. A simple thermodynamic model is coupled to the buoy dynamics and to an ice redistribution model to determine the influence of deformation, thermodynamics, and mechanical scavenging, incorporating frazil crystals from the surrounding slick into the pancakes, on the partitioning of ice volume between frazil and pancakes. Ice production was examined from the time the buoys were deployed until the frazil/pancake cover consolidated into the more familiar pack ice. The model reproduced the expected ice cover thickness at consolidation (60 cm). Rafting was the dominant contribution to thickening in the region owing to large-scale compression of the initial area by northerly winds from passing low-pressure weather systems, which are rather typical in the region. High-resolution positional forcing from the buoys (20-min intervals) doubled the contribution of mechanical scavenging to final pancake thickness compared to the coarser (2-h) result, owing to the larger path length that the pancakes traverse through the frazil slick, and produced a significantly larger volume of ice in the pancake phase. The ice cover generated at consolidation was approximately twice as thick as would have formed by the more familiar congelation ice growth under the same forcing, reinforcing the importance of correctly parameterizing the early stages of ice formation in the Antarctic. The study highlighted uncertainties in the effect of the frazil/pancake cover on ocean-atmosphere heat exchange, both in terms of the area contributing to ice production and the effect on turbulent exchange coefficients. Further work placing the empirical parameters into a more constrained physical framework and introducing wave properties is suggested. |
author2 |
Laboratoire d'océanographie de Villefranche (LOV) Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut de la Mer de Villefranche (IMEV) Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Doble, Martin J. |
author_facet |
Doble, Martin J. |
author_sort |
Doble, Martin J. |
title |
Simulating pancake and frazil ice growth in the Weddell Sea: A process model from freezing to consolidation |
title_short |
Simulating pancake and frazil ice growth in the Weddell Sea: A process model from freezing to consolidation |
title_full |
Simulating pancake and frazil ice growth in the Weddell Sea: A process model from freezing to consolidation |
title_fullStr |
Simulating pancake and frazil ice growth in the Weddell Sea: A process model from freezing to consolidation |
title_full_unstemmed |
Simulating pancake and frazil ice growth in the Weddell Sea: A process model from freezing to consolidation |
title_sort |
simulating pancake and frazil ice growth in the weddell sea: a process model from freezing to consolidation |
publisher |
HAL CCSD |
publishDate |
2009 |
url |
https://hal.archives-ouvertes.fr/hal-03505009 https://hal.archives-ouvertes.fr/hal-03505009/document https://hal.archives-ouvertes.fr/hal-03505009/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Doble%20-%20Simulating%20pancake%20and%20frazil%20ice%20growth%20in%20the%20Weddell%20Sea%20A.pdf https://doi.org/10.1029/2008JC004935 |
long_lat |
ENVELOPE(-55.815,-55.815,52.600,52.600) |
geographic |
Antarctic Pancake The Antarctic Weddell Weddell Sea |
geographic_facet |
Antarctic Pancake The Antarctic Weddell Weddell Sea |
genre |
Antarc* Antarctic Weddell Sea |
genre_facet |
Antarc* Antarctic Weddell Sea |
op_source |
JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS https://hal.archives-ouvertes.fr/hal-03505009 JOURNAL OF GEOPHYSICAL RESEARCH-OCEANS, 2009, 114, ⟨10.1029/2008JC004935⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008JC004935 hal-03505009 https://hal.archives-ouvertes.fr/hal-03505009 https://hal.archives-ouvertes.fr/hal-03505009/document https://hal.archives-ouvertes.fr/hal-03505009/file/Journal%20of%20Geophysical%20Research%20Oceans%20-%202009%20-%20Doble%20-%20Simulating%20pancake%20and%20frazil%20ice%20growth%20in%20the%20Weddell%20Sea%20A.pdf doi:10.1029/2008JC004935 |
op_rights |
http://hal.archives-ouvertes.fr/licences/copyright/ info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.1029/2008JC004935 |
container_title |
Journal of Geophysical Research |
container_volume |
114 |
container_issue |
C9 |
_version_ |
1766036346040745984 |