Numerical modelling of the Arctic and North Atlantic exchanges with NEMO: Focus on freshwater and dynamics
Degree: Doctor of Philosophy Abstract: The Arctic is currently undergoing significant changes due to increasing anthropogenic greenhouse gases causing atmospheric warming. The impact of this warming is clearly visible in the Arctic: reduced sea-ice cover, enhanced land-ice melting, increased frequen...
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University of Alberta. Department of Earth and Atmospheric Sciences.
2018
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fttriple:oai:gotriple.eu:10670/1.njzhrc 2023-05-15T14:28:45+02:00 Numerical modelling of the Arctic and North Atlantic exchanges with NEMO: Focus on freshwater and dynamics Grivault, Jonathan Myers, Paul G. (Earth and Atmospheric Sciences) 2018-09-19 https://era.library.ualberta.ca/items/f1573568-eb93-47c9-aa9b-e6f321b5f912 en eng University of Alberta. Department of Earth and Atmospheric Sciences. 10670/1.njzhrc https://era.library.ualberta.ca/items/f1573568-eb93-47c9-aa9b-e6f321b5f912 other ERA : Education and Research Archive geo envir Thesis https://vocabularies.coar-repositories.org/resource_types/c_46ec/ 2018 fttriple 2023-01-22T17:24:28Z Degree: Doctor of Philosophy Abstract: The Arctic is currently undergoing significant changes due to increasing anthropogenic greenhouse gases causing atmospheric warming. The impact of this warming is clearly visible in the Arctic: reduced sea-ice cover, enhanced land-ice melting, increased frequency of extreme weather, etc. Understanding the current dynamics of the Arctic Ocean and its exchange with the North Atlantic is the first step in understanding how it may change in the future. In this thesis, I focused on key regions where exchange between the Arctic Ocean and the North Atlantic occurs: Baffin Bay, the Canadian Arctic Archipelago, and the Arctic gateways. I used a numerical model with several domains, resolutions, atmospheric forcings, and runoff datasets to evaluate how Arctic outflow dynamics change or are impacted by the warming climate. I demonstrated (1) that enhanced Greenland melt significantly impacts the steric height in Baffin Bay, which changes the circulation in Baffin Bay, reducing the Arctic outflow through Baffin Bay. (2) The Canadian Arctic Archipelago throughflow is significantly impacted by sea-ice motion as sea-ice has a significant impact on the surface stress. In particular, I showed that more mobile ice enhanced the freshwater transport. (3) The main frequencies acting on the Arctic outflow variability are the seasonal cycle, and the 6-month, 3 year, 6 year, 8.5 year, and 21 year cycles. Variability on short timescales are associated with the atmospheric circulation via the Arctic Oscillation, while longer timescales are related to the variability of the sea surface height gradient between the Beaufort Gyre and Baffin Bay. Thesis Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Greenland North Atlantic Sea ice Unknown Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Greenland |
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geo envir Grivault, Jonathan Numerical modelling of the Arctic and North Atlantic exchanges with NEMO: Focus on freshwater and dynamics |
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description |
Degree: Doctor of Philosophy Abstract: The Arctic is currently undergoing significant changes due to increasing anthropogenic greenhouse gases causing atmospheric warming. The impact of this warming is clearly visible in the Arctic: reduced sea-ice cover, enhanced land-ice melting, increased frequency of extreme weather, etc. Understanding the current dynamics of the Arctic Ocean and its exchange with the North Atlantic is the first step in understanding how it may change in the future. In this thesis, I focused on key regions where exchange between the Arctic Ocean and the North Atlantic occurs: Baffin Bay, the Canadian Arctic Archipelago, and the Arctic gateways. I used a numerical model with several domains, resolutions, atmospheric forcings, and runoff datasets to evaluate how Arctic outflow dynamics change or are impacted by the warming climate. I demonstrated (1) that enhanced Greenland melt significantly impacts the steric height in Baffin Bay, which changes the circulation in Baffin Bay, reducing the Arctic outflow through Baffin Bay. (2) The Canadian Arctic Archipelago throughflow is significantly impacted by sea-ice motion as sea-ice has a significant impact on the surface stress. In particular, I showed that more mobile ice enhanced the freshwater transport. (3) The main frequencies acting on the Arctic outflow variability are the seasonal cycle, and the 6-month, 3 year, 6 year, 8.5 year, and 21 year cycles. Variability on short timescales are associated with the atmospheric circulation via the Arctic Oscillation, while longer timescales are related to the variability of the sea surface height gradient between the Beaufort Gyre and Baffin Bay. |
author2 |
Myers, Paul G. (Earth and Atmospheric Sciences) |
format |
Thesis |
author |
Grivault, Jonathan |
author_facet |
Grivault, Jonathan |
author_sort |
Grivault, Jonathan |
title |
Numerical modelling of the Arctic and North Atlantic exchanges with NEMO: Focus on freshwater and dynamics |
title_short |
Numerical modelling of the Arctic and North Atlantic exchanges with NEMO: Focus on freshwater and dynamics |
title_full |
Numerical modelling of the Arctic and North Atlantic exchanges with NEMO: Focus on freshwater and dynamics |
title_fullStr |
Numerical modelling of the Arctic and North Atlantic exchanges with NEMO: Focus on freshwater and dynamics |
title_full_unstemmed |
Numerical modelling of the Arctic and North Atlantic exchanges with NEMO: Focus on freshwater and dynamics |
title_sort |
numerical modelling of the arctic and north atlantic exchanges with nemo: focus on freshwater and dynamics |
publisher |
University of Alberta. Department of Earth and Atmospheric Sciences. |
publishDate |
2018 |
url |
https://era.library.ualberta.ca/items/f1573568-eb93-47c9-aa9b-e6f321b5f912 |
geographic |
Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Greenland |
geographic_facet |
Arctic Arctic Ocean Baffin Bay Canadian Arctic Archipelago Greenland |
genre |
Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Greenland North Atlantic Sea ice |
genre_facet |
Arctic Archipelago Arctic Arctic Ocean Baffin Bay Baffin Bay Baffin Canadian Arctic Archipelago Greenland North Atlantic Sea ice |
op_source |
ERA : Education and Research Archive |
op_relation |
10670/1.njzhrc https://era.library.ualberta.ca/items/f1573568-eb93-47c9-aa9b-e6f321b5f912 |
op_rights |
other |
_version_ |
1766302914643492864 |