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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ftdtic:ADA543824 2023-05-15T14:52:57+02:00 Shear and Stability at the Base of the Mixed Layer in the Arctic Ocean: The Role of Inertial Motions Suh, George Y. NAVAL POSTGRADUATE SCHOOL MONTEREY CA 2011-03 text/html http://www.dtic.mil/docs/citations/ADA543824 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA543824 en eng http://www.dtic.mil/docs/citations/ADA543824 Approved for public release; distribution is unlimited. DTIC Meteorology Physical and Dynamic Oceanography *MIXED LAYER(MARINE) *ARCTIC OCEAN WIND MOTION THESES METEOROLOGICAL DATA INERTIAL SYSTEMS OSCILLATION SEA ICE VELOCITY SHEAR PROPERTIES ICE FORMATION INERTIAL MOTIONS Text 2011 ftdtic 2016-02-23T08:00:03Z 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. The original document contains color images. Text Arctic Arctic Ocean Sea ice Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean |
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Open Polar |
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Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Meteorology Physical and Dynamic Oceanography *MIXED LAYER(MARINE) *ARCTIC OCEAN WIND MOTION THESES METEOROLOGICAL DATA INERTIAL SYSTEMS OSCILLATION SEA ICE VELOCITY SHEAR PROPERTIES ICE FORMATION INERTIAL MOTIONS |
spellingShingle |
Meteorology Physical and Dynamic Oceanography *MIXED LAYER(MARINE) *ARCTIC OCEAN WIND MOTION THESES METEOROLOGICAL DATA INERTIAL SYSTEMS OSCILLATION SEA ICE VELOCITY SHEAR PROPERTIES ICE FORMATION INERTIAL MOTIONS Suh, George Y. Shear and Stability at the Base of the Mixed Layer in the Arctic Ocean: The Role of Inertial Motions |
topic_facet |
Meteorology Physical and Dynamic Oceanography *MIXED LAYER(MARINE) *ARCTIC OCEAN WIND MOTION THESES METEOROLOGICAL DATA INERTIAL SYSTEMS OSCILLATION SEA ICE VELOCITY SHEAR PROPERTIES ICE FORMATION INERTIAL MOTIONS |
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. The original document contains color images. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
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 |
publishDate |
2011 |
url |
http://www.dtic.mil/docs/citations/ADA543824 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA543824 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA543824 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766324366986969088 |