Shear and stability at the base of the mixed layer in the Arctic Ocean the role of inertial motions
The Arctic environment changed significantly over recent decades and declines in perennial sea ice and thickness concentrations have been frequently observed. Current predictive models providing researchers with conservative estimates of sea ice concentrations, the lack of observations and understan...
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ftnavalpschool:oai:calhoun.nps.edu:10945/5751 2024-06-09T07:43:36+00:00 Shear and stability at the base of the mixed layer in the Arctic Ocean the role of inertial motions Suh, George Y. Stanton, Timothy Naval Postgraduate School (U.S.). Oceanography Shaw, William. 2011-03 xviii, 79 p. : col. ill. application/pdf https://hdl.handle.net/10945/5751 unknown Monterey, California. Naval Postgraduate School 720381862 https://hdl.handle.net/10945/5751 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. Sea ice Thesis 2011 ftnavalpschool 2024-05-15T01:05:57Z The Arctic environment changed significantly over recent decades and declines in perennial sea ice and thickness concentrations have been frequently observed. Current predictive models providing researchers with conservative estimates of sea ice concentrations, the lack of observations and understanding of the physical processes that promote changes in sea ice create inaccuracies that need to be improved. A fusion of buoy observations, satellite derived ice concentrations, and modeled wind data are made in this thesis to provide a better insight into sea ice inertial motions and its influence on the processes that occur in the Arctic Ocean mixed layer and to investigate whether these processes can be parameterized to improve predictive models. Observations made in the Canadian Basin and the Transpolar Drift by high resolution Autonomous Ocean Flux Buoys (AOFBs), SSMI and AMSR-E satellite derived ice concentrations, and ERA-Interim winds are used to examine the relationships between winds, ice coverage and sea ice inertial oscillations. Data collected from AOFBs and collocated Ice-Tethered Profilers (ITPs) are analyzed to investigate whether ocean mixed layer inertial oscillations contribute to shear instability at the base of the mixed layer, which serves as a mechanism for vertical transport of heat in water masses underlying the mixed layer. Results show that simple linear regression models cannot explain the relationship between inertial sea ice velocities and modeled winds. However, they do indicate that the magnitude of the inertial sea ice velocities during summers is greater when compared to winter. Analysis further reveals a relationship between sea ice inertial oscillations and sea ice concentrations. We conclude that parameterizing the conditions that permit significant inertial motions in terms of changing areal ice conditions is viable. Inertial oscillations generated in the Arctic Ocean mixed layer do contribute significantly to the instability at the base of the mixed layer, especially during ... Thesis Arctic Arctic Ocean Sea ice Naval Postgraduate School: Calhoun Arctic Arctic Ocean |
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Open Polar |
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Naval Postgraduate School: Calhoun |
op_collection_id |
ftnavalpschool |
language |
unknown |
topic |
Sea ice |
spellingShingle |
Sea ice Suh, George Y. Shear and stability at the base of the mixed layer in the Arctic Ocean the role of inertial motions |
topic_facet |
Sea ice |
description |
The Arctic environment changed significantly over recent decades and declines in perennial sea ice and thickness concentrations have been frequently observed. Current predictive models providing researchers with conservative estimates of sea ice concentrations, the lack of observations and understanding of the physical processes that promote changes in sea ice create inaccuracies that need to be improved. A fusion of buoy observations, satellite derived ice concentrations, and modeled wind data are made in this thesis to provide a better insight into sea ice inertial motions and its influence on the processes that occur in the Arctic Ocean mixed layer and to investigate whether these processes can be parameterized to improve predictive models. Observations made in the Canadian Basin and the Transpolar Drift by high resolution Autonomous Ocean Flux Buoys (AOFBs), SSMI and AMSR-E satellite derived ice concentrations, and ERA-Interim winds are used to examine the relationships between winds, ice coverage and sea ice inertial oscillations. Data collected from AOFBs and collocated Ice-Tethered Profilers (ITPs) are analyzed to investigate whether ocean mixed layer inertial oscillations contribute to shear instability at the base of the mixed layer, which serves as a mechanism for vertical transport of heat in water masses underlying the mixed layer. Results show that simple linear regression models cannot explain the relationship between inertial sea ice velocities and modeled winds. However, they do indicate that the magnitude of the inertial sea ice velocities during summers is greater when compared to winter. Analysis further reveals a relationship between sea ice inertial oscillations and sea ice concentrations. We conclude that parameterizing the conditions that permit significant inertial motions in terms of changing areal ice conditions is viable. Inertial oscillations generated in the Arctic Ocean mixed layer do contribute significantly to the instability at the base of the mixed layer, especially during ... |
author2 |
Stanton, Timothy Naval Postgraduate School (U.S.). Oceanography Shaw, William. |
format |
Thesis |
author |
Suh, George Y. |
author_facet |
Suh, George Y. |
author_sort |
Suh, George Y. |
title |
Shear and stability at the base of the mixed layer in the Arctic Ocean the role of inertial motions |
title_short |
Shear and stability at the base of the mixed layer in the Arctic Ocean the role of inertial motions |
title_full |
Shear and stability at the base of the mixed layer in the Arctic Ocean the role of inertial motions |
title_fullStr |
Shear and stability at the base of the mixed layer in the Arctic Ocean the role of inertial motions |
title_full_unstemmed |
Shear and stability at the base of the mixed layer in the Arctic Ocean the role of inertial motions |
title_sort |
shear and stability at the base of the mixed layer in the arctic ocean the role of inertial motions |
publisher |
Monterey, California. Naval Postgraduate School |
publishDate |
2011 |
url |
https://hdl.handle.net/10945/5751 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_relation |
720381862 https://hdl.handle.net/10945/5751 |
op_rights |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. |
_version_ |
1801372469945171968 |