Landfast ice in the Arctic: parameterization in numerical modeling and effects on the hydrography
The Arctic amplification of climate change is strongly connected to the sea ice in the Arctic because of the sea ice albedo and insulation effects. This thesis presents numerical modeling studies on landfast ice and the kinetic energy dissipation within sea ice in the Arctic. Landfast ice is sea ice...
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Universität Bremen
2023
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ftsubbremen:oai:media.suub.uni-bremen.de:Publications/elib/6761 2023-05-15T13:11:08+02:00 Landfast ice in the Arctic: parameterization in numerical modeling and effects on the hydrography Liu, Yuqing Losch, Martin Jung, Thomas 2023-03-09 application/pdf https://media.suub.uni-bremen.de/handle/elib/6761 https://doi.org/10.26092/elib/2100 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib67610 eng eng Universität Bremen Fachbereich 01: Physik/Elektrotechnik (FB 01) https://media.suub.uni-bremen.de/handle/elib/6761 https://doi.org/10.26092/elib/2100 doi:10.26092/elib/2100 urn:nbn:de:gbv:46-elib67610 info:eu-repo/semantics/openAccess CC BY 4.0 (Attribution) https://creativecommons.org/licenses/by/4.0/ Landfast ice Arctic Parameterization 530 530 Physics ddc:530 Dissertation doctoralThesis 2023 ftsubbremen https://doi.org/10.26092/elib/2100 2023-03-26T22:09:16Z The Arctic amplification of climate change is strongly connected to the sea ice in the Arctic because of the sea ice albedo and insulation effects. This thesis presents numerical modeling studies on landfast ice and the kinetic energy dissipation within sea ice in the Arctic. Landfast ice is sea ice that is nearly immobile and attached to the coast. As an extension to the land, landfast ice provides a platform for tourism, transportation, and hunting for the local communities, as well as for oil and gas drilling and scientific observation. Although landfast ice plays an important role in the Arctic coastal regions, it is challenging to represent landfast ice in numerical sea ice models with a standard viscous-plastic (VP) rheology. In this thesis, I implement a lateral drag parameterization to improve the representation of the landfast ice in the sea ice model and study the kinetic energy dissipation by sea ice internal stress. This thesis has three scientific questions: (1) How can we improve the representation of landfast ice in the sea ice numerical model? (2) What is the influence on the Arctic Ocean hydrography with the presence of landfast ice cover in the sea ice model? (3) Does the kinetic energy dissipation depend on the details of the VP yield curves? With higher resolution, the heterogeneity of the sea ice cover increases and deformation localizes at distinct linear kinematic features. Does this change have an effect on the mechanical energy cycle? Firstly, coastal drag parameterization is implemented in the coarse sea ice model, as a function of coastline length, sea ice thickness, and sea ice drift velocity. The results show that the new parameterization improves the simulation of landfast ice in deep marginal seas of the Arctic. Furthermore, the combination of lateral and basal drag parameterization simulates realistic landfast ice distributions in the Arctic. Secondly, the landfast ice cover is switched on and off in the sea ice model to study the influence of the landfast ice on the Arctic ... Doctoral or Postdoctoral Thesis albedo Arctic Arctic Ocean Climate change Sea ice Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) Arctic Arctic Ocean |
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Media SuUB Bremen (Staats- und Universitätsbibliothek Bremen) |
op_collection_id |
ftsubbremen |
language |
English |
topic |
Landfast ice Arctic Parameterization 530 530 Physics ddc:530 |
spellingShingle |
Landfast ice Arctic Parameterization 530 530 Physics ddc:530 Liu, Yuqing Landfast ice in the Arctic: parameterization in numerical modeling and effects on the hydrography |
topic_facet |
Landfast ice Arctic Parameterization 530 530 Physics ddc:530 |
description |
The Arctic amplification of climate change is strongly connected to the sea ice in the Arctic because of the sea ice albedo and insulation effects. This thesis presents numerical modeling studies on landfast ice and the kinetic energy dissipation within sea ice in the Arctic. Landfast ice is sea ice that is nearly immobile and attached to the coast. As an extension to the land, landfast ice provides a platform for tourism, transportation, and hunting for the local communities, as well as for oil and gas drilling and scientific observation. Although landfast ice plays an important role in the Arctic coastal regions, it is challenging to represent landfast ice in numerical sea ice models with a standard viscous-plastic (VP) rheology. In this thesis, I implement a lateral drag parameterization to improve the representation of the landfast ice in the sea ice model and study the kinetic energy dissipation by sea ice internal stress. This thesis has three scientific questions: (1) How can we improve the representation of landfast ice in the sea ice numerical model? (2) What is the influence on the Arctic Ocean hydrography with the presence of landfast ice cover in the sea ice model? (3) Does the kinetic energy dissipation depend on the details of the VP yield curves? With higher resolution, the heterogeneity of the sea ice cover increases and deformation localizes at distinct linear kinematic features. Does this change have an effect on the mechanical energy cycle? Firstly, coastal drag parameterization is implemented in the coarse sea ice model, as a function of coastline length, sea ice thickness, and sea ice drift velocity. The results show that the new parameterization improves the simulation of landfast ice in deep marginal seas of the Arctic. Furthermore, the combination of lateral and basal drag parameterization simulates realistic landfast ice distributions in the Arctic. Secondly, the landfast ice cover is switched on and off in the sea ice model to study the influence of the landfast ice on the Arctic ... |
author2 |
Losch, Martin Jung, Thomas |
format |
Doctoral or Postdoctoral Thesis |
author |
Liu, Yuqing |
author_facet |
Liu, Yuqing |
author_sort |
Liu, Yuqing |
title |
Landfast ice in the Arctic: parameterization in numerical modeling and effects on the hydrography |
title_short |
Landfast ice in the Arctic: parameterization in numerical modeling and effects on the hydrography |
title_full |
Landfast ice in the Arctic: parameterization in numerical modeling and effects on the hydrography |
title_fullStr |
Landfast ice in the Arctic: parameterization in numerical modeling and effects on the hydrography |
title_full_unstemmed |
Landfast ice in the Arctic: parameterization in numerical modeling and effects on the hydrography |
title_sort |
landfast ice in the arctic: parameterization in numerical modeling and effects on the hydrography |
publisher |
Universität Bremen |
publishDate |
2023 |
url |
https://media.suub.uni-bremen.de/handle/elib/6761 https://doi.org/10.26092/elib/2100 https://nbn-resolving.org/urn:nbn:de:gbv:46-elib67610 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
albedo Arctic Arctic Ocean Climate change Sea ice |
genre_facet |
albedo Arctic Arctic Ocean Climate change Sea ice |
op_relation |
https://media.suub.uni-bremen.de/handle/elib/6761 https://doi.org/10.26092/elib/2100 doi:10.26092/elib/2100 urn:nbn:de:gbv:46-elib67610 |
op_rights |
info:eu-repo/semantics/openAccess CC BY 4.0 (Attribution) https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.26092/elib/2100 |
_version_ |
1766246110324588544 |