Influence of subgrid-scale processes on the sea ice and the polar oceans in a global ocean–sea ice model
From the point of view of an external observer in orbit around Earth, sea ice is an ultra-thin layer capping the polar oceans. This layer regulates the interactions between the atmosphere and the ocean. However, when taking a closer look, sea ice appears as a heterogeneous material governed by compl...
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Language: | English |
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2023
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Online Access: | http://hdl.handle.net/2078.1/284328 |
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ftunistlouisbrus:oai:dial.uclouvain.be:boreal:284328 2024-05-12T07:59:15+00:00 Influence of subgrid-scale processes on the sea ice and the polar oceans in a global ocean–sea ice model Sterlin, Jean UCL - SST/ELI/ELIC - Earth & Climate UCL - Faculté des Sciences Fichefet, Thierry Massonnet, François Goosse, Hugues Vancoppenolle, Martin Tsamados, Michel Yin, Qiuzhen 2023 http://hdl.handle.net/2078.1/284328 eng eng boreal:284328 http://hdl.handle.net/2078.1/284328 info:eu-repo/semantics/openAccess Sea ice form drag Landfast ice Ocean general circulation model Sea ice model Subgrid-scale processes Sea ice Arctic Ocean Southern Ocean Melt ponds info:eu-repo/semantics/doctoralThesis 2023 ftunistlouisbrus 2024-04-18T16:56:28Z From the point of view of an external observer in orbit around Earth, sea ice is an ultra-thin layer capping the polar oceans. This layer regulates the interactions between the atmosphere and the ocean. However, when taking a closer look, sea ice appears as a heterogeneous material governed by complex dynamic and thermodynamic processes on a wide range of scales. Small-scale sea ice may impact large-scale sea ice properties and influence the other components of Earth's climate system. This makes the modelling and study of sea ice challenging for the climate community. In this doctoral thesis, I investigated the impact of unresolved small-scale sea ice processes using the ocean–sea ice modelling framework NEMO-LIM3. I implemented parameterizations to improve the representation of melt ponds, sea ice form drag and landfast ice in NEMO-LIM3 for their importance in the surface energy budget, the turbulent fluxes of momentum and heat and the momentum equation for sea ice. The results of this thesis show that atmospheric forcing uncertainties have a higher impact on the modelled sea ice state than differences in melt pond parameterizations. Sea ice form drag is relevant for modelling the upper Arctic Ocean on annual, interannual and decadal time scales. Landfast ice impacts the properties of the whole Arctic sea ice and Arctic halocline. While these developments may ultimately improve large-scale sea ice models, other unresolved sea ice processes require further examination. In particular, I advise studying the sea ice processes covered in this thesis with Earth System Models to account for the interactions between the ocean, sea ice and the atmosphere. (SC - Sciences) -- UCL, 2023 Doctoral or Postdoctoral Thesis Arctic Arctic Ocean Sea ice Southern Ocean DIAL@USL-B (Université Saint-Louis, Bruxelles) Arctic Arctic Ocean Southern Ocean |
institution |
Open Polar |
collection |
DIAL@USL-B (Université Saint-Louis, Bruxelles) |
op_collection_id |
ftunistlouisbrus |
language |
English |
topic |
Sea ice form drag Landfast ice Ocean general circulation model Sea ice model Subgrid-scale processes Sea ice Arctic Ocean Southern Ocean Melt ponds |
spellingShingle |
Sea ice form drag Landfast ice Ocean general circulation model Sea ice model Subgrid-scale processes Sea ice Arctic Ocean Southern Ocean Melt ponds Sterlin, Jean Influence of subgrid-scale processes on the sea ice and the polar oceans in a global ocean–sea ice model |
topic_facet |
Sea ice form drag Landfast ice Ocean general circulation model Sea ice model Subgrid-scale processes Sea ice Arctic Ocean Southern Ocean Melt ponds |
description |
From the point of view of an external observer in orbit around Earth, sea ice is an ultra-thin layer capping the polar oceans. This layer regulates the interactions between the atmosphere and the ocean. However, when taking a closer look, sea ice appears as a heterogeneous material governed by complex dynamic and thermodynamic processes on a wide range of scales. Small-scale sea ice may impact large-scale sea ice properties and influence the other components of Earth's climate system. This makes the modelling and study of sea ice challenging for the climate community. In this doctoral thesis, I investigated the impact of unresolved small-scale sea ice processes using the ocean–sea ice modelling framework NEMO-LIM3. I implemented parameterizations to improve the representation of melt ponds, sea ice form drag and landfast ice in NEMO-LIM3 for their importance in the surface energy budget, the turbulent fluxes of momentum and heat and the momentum equation for sea ice. The results of this thesis show that atmospheric forcing uncertainties have a higher impact on the modelled sea ice state than differences in melt pond parameterizations. Sea ice form drag is relevant for modelling the upper Arctic Ocean on annual, interannual and decadal time scales. Landfast ice impacts the properties of the whole Arctic sea ice and Arctic halocline. While these developments may ultimately improve large-scale sea ice models, other unresolved sea ice processes require further examination. In particular, I advise studying the sea ice processes covered in this thesis with Earth System Models to account for the interactions between the ocean, sea ice and the atmosphere. (SC - Sciences) -- UCL, 2023 |
author2 |
UCL - SST/ELI/ELIC - Earth & Climate UCL - Faculté des Sciences Fichefet, Thierry Massonnet, François Goosse, Hugues Vancoppenolle, Martin Tsamados, Michel Yin, Qiuzhen |
format |
Doctoral or Postdoctoral Thesis |
author |
Sterlin, Jean |
author_facet |
Sterlin, Jean |
author_sort |
Sterlin, Jean |
title |
Influence of subgrid-scale processes on the sea ice and the polar oceans in a global ocean–sea ice model |
title_short |
Influence of subgrid-scale processes on the sea ice and the polar oceans in a global ocean–sea ice model |
title_full |
Influence of subgrid-scale processes on the sea ice and the polar oceans in a global ocean–sea ice model |
title_fullStr |
Influence of subgrid-scale processes on the sea ice and the polar oceans in a global ocean–sea ice model |
title_full_unstemmed |
Influence of subgrid-scale processes on the sea ice and the polar oceans in a global ocean–sea ice model |
title_sort |
influence of subgrid-scale processes on the sea ice and the polar oceans in a global ocean–sea ice model |
publishDate |
2023 |
url |
http://hdl.handle.net/2078.1/284328 |
geographic |
Arctic Arctic Ocean Southern Ocean |
geographic_facet |
Arctic Arctic Ocean Southern Ocean |
genre |
Arctic Arctic Ocean Sea ice Southern Ocean |
genre_facet |
Arctic Arctic Ocean Sea ice Southern Ocean |
op_relation |
boreal:284328 http://hdl.handle.net/2078.1/284328 |
op_rights |
info:eu-repo/semantics/openAccess |
_version_ |
1798840379819163648 |