Echanges between the Arctic Ocean and the North Atlantic: Origin, variability and impact in the Nordic Seas.
While perhaps the most obvious, ice retreat is just one aspect of a changing Arctic system. The Arctic Ocean is also undergoing unprecedented modifications, that mostly affect its heat and freshwater budgets. As the signal of Arctic change is expected to have its major climatic impact by reaching so...
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ftccsdartic:oai:HAL:tel-00528245v2 2023-05-15T14:34:53+02:00 Echanges between the Arctic Ocean and the North Atlantic: Origin, variability and impact in the Nordic Seas. Etude des échanges entre l'Océan Arctique et l'Atlantique Nord : Origine, Variabilité et Impact sur les mers Nordiques Lique, Camille Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Université de Bretagne occidentale - Brest Anne-Marie Tréguier 2010-10-08 https://tel.archives-ouvertes.fr/tel-00528245 https://tel.archives-ouvertes.fr/tel-00528245v2/document https://tel.archives-ouvertes.fr/tel-00528245v2/file/these_final.pdf fr fre HAL CCSD tel-00528245 https://tel.archives-ouvertes.fr/tel-00528245 https://tel.archives-ouvertes.fr/tel-00528245v2/document https://tel.archives-ouvertes.fr/tel-00528245v2/file/these_final.pdf info:eu-repo/semantics/OpenAccess https://tel.archives-ouvertes.fr/tel-00528245 Océan, Atmosphère. Université de Bretagne occidentale - Brest, 2010. Français Freshwater flux Sea ice Numerical model Lagrangian analysis Atmospheric forcing Arctic Ocean Freshwater budget Analyse Lagrangienne Forçages atmosphériques Flux d'eau douce Glace de mer Modèle numérique Océan Arctique Bilan d'eau douce [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere info:eu-repo/semantics/doctoralThesis Theses 2010 ftccsdartic 2021-10-17T01:56:40Z While perhaps the most obvious, ice retreat is just one aspect of a changing Arctic system. The Arctic Ocean is also undergoing unprecedented modifications, that mostly affect its heat and freshwater budgets. As the signal of Arctic change is expected to have its major climatic impact by reaching south the subarctic seas, on either side of Greenland, to modulate the Atlantic thermohaline circulation, the objective of this thesis is to investigate the variability of the exports of volume, heat, freshwater and sea-ice from the Arctic Ocean to the North Atlantic. First, a realistic simulation from 1958 to 2002 run with a global ocean/sea-ice model is used to investigate some aspects of the variability of the Arctic freshwater budget, trying to understand which component of the balance is responsible for the variability of the Arctic freshwater content. We also examine the variability of the freshwater exports to the North Atlantic and we find that this variability is controlled differently on both sides of Greenland: whilst freshwater transport variations across Davis Strait are completely determined by the variations of the total volume flux, the salinity variations due to the ice ocean flux north of Greenland are responsible for a significant part of the freshwater export variability through Fram Strait. Afterward, a simulation run with a fully assimilated model of the very recent period is used to explore the possible consequences of the 2007 sea ice extent minimum on the Arctic Ocean freshwater content. Then, the origins of the water masses exported from the Arctic to the North Atlantic along both sides of Greenland are investigated, using an original numerical method. A quantitative Lagrangian analysis is applied to the monthly climatological 3D output of a global ocean/sea-ice high resolution model. It allows quantification of the different branches of the export to the North Atlantic, as well as related timescales and water mass transformations. A complete and coherent scheme of circulation for the Arctic is ... Doctoral or Postdoctoral Thesis Arctic Arctic Ocean Arctique* Davis Strait Fram Strait Greenland Nordic Seas North Atlantic Océan Arctique Sea ice Subarctic Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) Arctic Arctic Ocean Greenland |
institution |
Open Polar |
collection |
Archive ouverte HAL (Hyper Article en Ligne, CCSD - Centre pour la Communication Scientifique Directe) |
op_collection_id |
ftccsdartic |
language |
French |
topic |
Freshwater flux Sea ice Numerical model Lagrangian analysis Atmospheric forcing Arctic Ocean Freshwater budget Analyse Lagrangienne Forçages atmosphériques Flux d'eau douce Glace de mer Modèle numérique Océan Arctique Bilan d'eau douce [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
spellingShingle |
Freshwater flux Sea ice Numerical model Lagrangian analysis Atmospheric forcing Arctic Ocean Freshwater budget Analyse Lagrangienne Forçages atmosphériques Flux d'eau douce Glace de mer Modèle numérique Océan Arctique Bilan d'eau douce [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere Lique, Camille Echanges between the Arctic Ocean and the North Atlantic: Origin, variability and impact in the Nordic Seas. |
topic_facet |
Freshwater flux Sea ice Numerical model Lagrangian analysis Atmospheric forcing Arctic Ocean Freshwater budget Analyse Lagrangienne Forçages atmosphériques Flux d'eau douce Glace de mer Modèle numérique Océan Arctique Bilan d'eau douce [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere |
description |
While perhaps the most obvious, ice retreat is just one aspect of a changing Arctic system. The Arctic Ocean is also undergoing unprecedented modifications, that mostly affect its heat and freshwater budgets. As the signal of Arctic change is expected to have its major climatic impact by reaching south the subarctic seas, on either side of Greenland, to modulate the Atlantic thermohaline circulation, the objective of this thesis is to investigate the variability of the exports of volume, heat, freshwater and sea-ice from the Arctic Ocean to the North Atlantic. First, a realistic simulation from 1958 to 2002 run with a global ocean/sea-ice model is used to investigate some aspects of the variability of the Arctic freshwater budget, trying to understand which component of the balance is responsible for the variability of the Arctic freshwater content. We also examine the variability of the freshwater exports to the North Atlantic and we find that this variability is controlled differently on both sides of Greenland: whilst freshwater transport variations across Davis Strait are completely determined by the variations of the total volume flux, the salinity variations due to the ice ocean flux north of Greenland are responsible for a significant part of the freshwater export variability through Fram Strait. Afterward, a simulation run with a fully assimilated model of the very recent period is used to explore the possible consequences of the 2007 sea ice extent minimum on the Arctic Ocean freshwater content. Then, the origins of the water masses exported from the Arctic to the North Atlantic along both sides of Greenland are investigated, using an original numerical method. A quantitative Lagrangian analysis is applied to the monthly climatological 3D output of a global ocean/sea-ice high resolution model. It allows quantification of the different branches of the export to the North Atlantic, as well as related timescales and water mass transformations. A complete and coherent scheme of circulation for the Arctic is ... |
author2 |
Laboratoire de physique des océans (LPO) Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS) Université de Bretagne occidentale - Brest Anne-Marie Tréguier |
format |
Doctoral or Postdoctoral Thesis |
author |
Lique, Camille |
author_facet |
Lique, Camille |
author_sort |
Lique, Camille |
title |
Echanges between the Arctic Ocean and the North Atlantic: Origin, variability and impact in the Nordic Seas. |
title_short |
Echanges between the Arctic Ocean and the North Atlantic: Origin, variability and impact in the Nordic Seas. |
title_full |
Echanges between the Arctic Ocean and the North Atlantic: Origin, variability and impact in the Nordic Seas. |
title_fullStr |
Echanges between the Arctic Ocean and the North Atlantic: Origin, variability and impact in the Nordic Seas. |
title_full_unstemmed |
Echanges between the Arctic Ocean and the North Atlantic: Origin, variability and impact in the Nordic Seas. |
title_sort |
echanges between the arctic ocean and the north atlantic: origin, variability and impact in the nordic seas. |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://tel.archives-ouvertes.fr/tel-00528245 https://tel.archives-ouvertes.fr/tel-00528245v2/document https://tel.archives-ouvertes.fr/tel-00528245v2/file/these_final.pdf |
geographic |
Arctic Arctic Ocean Greenland |
geographic_facet |
Arctic Arctic Ocean Greenland |
genre |
Arctic Arctic Ocean Arctique* Davis Strait Fram Strait Greenland Nordic Seas North Atlantic Océan Arctique Sea ice Subarctic |
genre_facet |
Arctic Arctic Ocean Arctique* Davis Strait Fram Strait Greenland Nordic Seas North Atlantic Océan Arctique Sea ice Subarctic |
op_source |
https://tel.archives-ouvertes.fr/tel-00528245 Océan, Atmosphère. Université de Bretagne occidentale - Brest, 2010. Français |
op_relation |
tel-00528245 https://tel.archives-ouvertes.fr/tel-00528245 https://tel.archives-ouvertes.fr/tel-00528245v2/document https://tel.archives-ouvertes.fr/tel-00528245v2/file/these_final.pdf |
op_rights |
info:eu-repo/semantics/OpenAccess |
_version_ |
1766307831320936448 |