Interaction between sea ice and oceanic eddies in the Arctic

In the Arctic Basin, the ocean and sea ice are in constant interaction, raising questions about the role of the ocean in changes affecting sea ice. Mesoscale eddies may represent anocean mechanism that influences sea ice conditions and their change. In this manuscript, I use a variety of complementa...

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Bibliographic Details
Main Author: Cassianides, Angelina
Other Authors: Laboratoire d'Océanographie Physique et Spatiale (LOPS), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Université de Bretagne occidentale - Brest, Camille Lique
Format: Doctoral or Postdoctoral Thesis
Language:French
Published: HAL CCSD 2023
Subjects:
Eddies
Mesoscale
Arctic Ocean
Sea ice
Tourbillon
Mésoéchelle
Océan Arctique
Glace de mer
[SDU.STU.OC]Sciences of the Universe [physics]/Earth Sciences/Oceanography
Arctic
Tourbillons
Arctic Basin
Arctique*
banquise
Online Access:https://theses.hal.science/tel-04274721
https://theses.hal.science/tel-04274721/document
https://theses.hal.science/tel-04274721/file/These-2023-SML-Oceanographie_physique-CASSIANIDES_Angelina.pdf
Description
Summary:In the Arctic Basin, the ocean and sea ice are in constant interaction, raising questions about the role of the ocean in changes affecting sea ice. Mesoscale eddies may represent anocean mechanism that influences sea ice conditions and their change. In this manuscript, I use a variety of complementary tools, including observational data and high resolution simulation, in order to understand how sea ice and oceanic mesoscale eddies interact in the Arctic. Analysis of in situ data over the period 2004-2019 allows the quantification of the dynamical and thermodynamical interaction processes, and suggests that eddies may leave a signature in the sea ice vorticity This signature is then isolated for an eddy propagating in the marginal ice zone of the Canadian Basin, using a combination of in situ data and SAR images, and to a new detection method based on the sea ice vorticity. Finally, I quantify this dynamical interaction at the scale of the Arctic Basin using a high resolution simulation based on the coupled NEMO-LIM 3.5 model. A 20-year analysis shows a prominent impact and signature of mesoscale dynamics in the marginal ice regions of the Arctic Basin, but absent in the pack ice, where the influence of the atmosphere is dominant. Dans le bassin Arctique, l’océan et la banquise sont en interaction constante, suscitant des interrogations sur le rôle de l’océan dans les changements qui affectent la glace de mer. Les tourbillons de mésoéchelle pourraient représenter un mécanisme océanique qui influence les conditions de glace de mer et leur changement.Dans ce manuscrit de thèse, j’utilise des outils variés et complémentaires comprenant des données d’observation ainsi qu’une simulation à haute résolution afin de comprendre comment interagissent la glace de mer et les tourbillons océaniques de mésoéchelle en Arctique. L’analyse des données in situ sur la période 2004-2019 permet de quantifier les processus d’interactions dynamiques et thermodynamiques, et suggère que les tourbillons pourraient laisser une signature ...

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