An evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model
The Regional Arctic System Model (RASM) is used to investigate the process and frequency of extreme sea ice shear deformation events resulting in pycnocline upwelling due to Ekman pumping as described in McPhee et al. (2005). RASM is a fully coupled land, atmosphere, sea ice, and ocean model with hi...
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Monterey, California. Naval Postgraduate School
2012
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ftnavalpschool:oai:calhoun.nps.edu:10945/27872 2024-06-09T07:43:29+00:00 An evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model Mills, Thomas J. Maslowski, Wieslaw Roberts, Andrew Oceanography 2012-12 application/pdf https://hdl.handle.net/10945/27872 unknown Monterey, California. Naval Postgraduate School https://hdl.handle.net/10945/27872 Arctic Ocean Sea Ice RASM Coupled Ice-Ocean Model Sea Ice Dynamics Sea Ice Thickness Distribution Sea Ice Variability Thesis 2012 ftnavalpschool 2024-05-15T00:08:33Z The Regional Arctic System Model (RASM) is used to investigate the process and frequency of extreme sea ice shear deformation events resulting in pycnocline upwelling due to Ekman pumping as described in McPhee et al. (2005). RASM is a fully coupled land, atmosphere, sea ice, and ocean model with high spatial and temporal resolution. Time series analysis of the upper ocean temperature structure, basal melt rate, total deformation rate, and ice-ocean stress curl yield the identification of individual events. Shear deformation events generate an upper ocean response given a positive ice-ocean stress curl, i.e., induced by counterclockwise rotation in the ice velocity field relative to the underlying ocean. Spatial and temporal characterization of the total deformation rate indicates that fine spatial and temporal resolution, on a statistical scale, is important for the energy budget of the Arctic. Results demonstrate a power law relationship between the mean deformation rate and length scale. This is hypothesized as being due to RASMs fully coupled system allowing for naturally occurring high frequency noise and the cascade of energy among model components. Simulated events are infrequent their relative impact on large scale energy exchange remains undetermined, which warrants further research of these phenomena. Approved for public release; distribution is unlimited. Lieutenant, United States Navy http://archive.org/details/anevaluationofse1094527872 Thesis Arctic Arctic Ocean Sea ice Naval Postgraduate School: Calhoun Arctic Arctic Ocean Curl ENVELOPE(-63.071,-63.071,-70.797,-70.797) |
institution |
Open Polar |
collection |
Naval Postgraduate School: Calhoun |
op_collection_id |
ftnavalpschool |
language |
unknown |
topic |
Arctic Ocean Sea Ice RASM Coupled Ice-Ocean Model Sea Ice Dynamics Sea Ice Thickness Distribution Sea Ice Variability |
spellingShingle |
Arctic Ocean Sea Ice RASM Coupled Ice-Ocean Model Sea Ice Dynamics Sea Ice Thickness Distribution Sea Ice Variability Mills, Thomas J. An evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model |
topic_facet |
Arctic Ocean Sea Ice RASM Coupled Ice-Ocean Model Sea Ice Dynamics Sea Ice Thickness Distribution Sea Ice Variability |
description |
The Regional Arctic System Model (RASM) is used to investigate the process and frequency of extreme sea ice shear deformation events resulting in pycnocline upwelling due to Ekman pumping as described in McPhee et al. (2005). RASM is a fully coupled land, atmosphere, sea ice, and ocean model with high spatial and temporal resolution. Time series analysis of the upper ocean temperature structure, basal melt rate, total deformation rate, and ice-ocean stress curl yield the identification of individual events. Shear deformation events generate an upper ocean response given a positive ice-ocean stress curl, i.e., induced by counterclockwise rotation in the ice velocity field relative to the underlying ocean. Spatial and temporal characterization of the total deformation rate indicates that fine spatial and temporal resolution, on a statistical scale, is important for the energy budget of the Arctic. Results demonstrate a power law relationship between the mean deformation rate and length scale. This is hypothesized as being due to RASMs fully coupled system allowing for naturally occurring high frequency noise and the cascade of energy among model components. Simulated events are infrequent their relative impact on large scale energy exchange remains undetermined, which warrants further research of these phenomena. Approved for public release; distribution is unlimited. Lieutenant, United States Navy http://archive.org/details/anevaluationofse1094527872 |
author2 |
Maslowski, Wieslaw Roberts, Andrew Oceanography |
format |
Thesis |
author |
Mills, Thomas J. |
author_facet |
Mills, Thomas J. |
author_sort |
Mills, Thomas J. |
title |
An evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model |
title_short |
An evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model |
title_full |
An evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model |
title_fullStr |
An evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model |
title_full_unstemmed |
An evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model |
title_sort |
evaluation of sea ice deformation and its spatial characteristics from the regional arctic system model |
publisher |
Monterey, California. Naval Postgraduate School |
publishDate |
2012 |
url |
https://hdl.handle.net/10945/27872 |
long_lat |
ENVELOPE(-63.071,-63.071,-70.797,-70.797) |
geographic |
Arctic Arctic Ocean Curl |
geographic_facet |
Arctic Arctic Ocean Curl |
genre |
Arctic Arctic Ocean Sea ice |
genre_facet |
Arctic Arctic Ocean Sea ice |
op_relation |
https://hdl.handle.net/10945/27872 |
_version_ |
1801372304913989632 |