High Latitude Coupled Sea-Ice-Air Thermodynamics
Presently ice extent forecast models such as the U.S. Navy Polar Ice Prediction System (PIPS) neglect or treat small-scale thermodynamic processes and entrainment unrealistically. Incorporating better algorithms that include more complete physics of the mixed layer dynamics will allow for improved p...
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ftdtic:ADA427275 2023-05-15T15:12:05+02:00 High Latitude Coupled Sea-Ice-Air Thermodynamics Swick, William A. NAVAL POSTGRADUATE SCHOOL MONTEREY CA 2004-09 text/html http://www.dtic.mil/docs/citations/ADA427275 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA427275 en eng http://www.dtic.mil/docs/citations/ADA427275 Availability: This document is not available from DTIC in microfiche. DTIC AND NTIS Thermodynamics *THERMODYNAMICS ALGORITHMS POLAR REGIONS THESES KINETIC ENERGY SALINITY WATER DISTRIBUTION OPEN WATER ICE FORECASTING Text 2004 ftdtic 2016-02-21T09:09:12Z Presently ice extent forecast models such as the U.S. Navy Polar Ice Prediction System (PIPS) neglect or treat small-scale thermodynamic processes and entrainment unrealistically. Incorporating better algorithms that include more complete physics of the mixed layer dynamics will allow for improved prediction of ice thickness and distribution, open water distribution, polynyas, and deep-water formation in the polar seas. A one-dimensional mixed layer turbulent kinetic energy (TKE) budget model based on Garwood's NPS mixed layer model for deep convection (Garwood, 1991) was written in MATLAB(trade name). The model consisted of a system of ten equations derived by vertically integrating the budgets for heat, momentum, salinity, and turbulent kinetic energy between the sea-ice-air interface and the base of the turbulent mixed layer. The NPS mixed layer model was tested using atmospheric forcing and ocean profiles collected at the Surface Heat Budget of the Arctic Ocean Experiment (SHEBA) site, where wind stress and forced convection predominates. Sensitivity studies using ocean profiles of the Greenland Sea were also conducted to address thermodynamics and ocean profiles, where surface cooling and free convection predominates. Specific findings and results include: the role of unsteadiness, the responses of feedback processes depending on the mixed layer structure, and the importance of the temporal resolution of the model forcing on both skill and sensitivity of the output. The role of unsteadiness such as heat storage within the mixed layer has a large impact on ice melting or formation. Feedback between the atmosphere and ice is responsive and depends not only on atmospheric forcing but the underlying ocean structure. The original document contains color images. Text Arctic Arctic Ocean Greenland Greenland Sea Sea ice Surface Heat Budget of the Arctic Ocean Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean Garwood ENVELOPE(164.283,164.283,-78.033,-78.033) Greenland |
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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 |
Thermodynamics *THERMODYNAMICS ALGORITHMS POLAR REGIONS THESES KINETIC ENERGY SALINITY WATER DISTRIBUTION OPEN WATER ICE FORECASTING |
spellingShingle |
Thermodynamics *THERMODYNAMICS ALGORITHMS POLAR REGIONS THESES KINETIC ENERGY SALINITY WATER DISTRIBUTION OPEN WATER ICE FORECASTING Swick, William A. High Latitude Coupled Sea-Ice-Air Thermodynamics |
topic_facet |
Thermodynamics *THERMODYNAMICS ALGORITHMS POLAR REGIONS THESES KINETIC ENERGY SALINITY WATER DISTRIBUTION OPEN WATER ICE FORECASTING |
description |
Presently ice extent forecast models such as the U.S. Navy Polar Ice Prediction System (PIPS) neglect or treat small-scale thermodynamic processes and entrainment unrealistically. Incorporating better algorithms that include more complete physics of the mixed layer dynamics will allow for improved prediction of ice thickness and distribution, open water distribution, polynyas, and deep-water formation in the polar seas. A one-dimensional mixed layer turbulent kinetic energy (TKE) budget model based on Garwood's NPS mixed layer model for deep convection (Garwood, 1991) was written in MATLAB(trade name). The model consisted of a system of ten equations derived by vertically integrating the budgets for heat, momentum, salinity, and turbulent kinetic energy between the sea-ice-air interface and the base of the turbulent mixed layer. The NPS mixed layer model was tested using atmospheric forcing and ocean profiles collected at the Surface Heat Budget of the Arctic Ocean Experiment (SHEBA) site, where wind stress and forced convection predominates. Sensitivity studies using ocean profiles of the Greenland Sea were also conducted to address thermodynamics and ocean profiles, where surface cooling and free convection predominates. Specific findings and results include: the role of unsteadiness, the responses of feedback processes depending on the mixed layer structure, and the importance of the temporal resolution of the model forcing on both skill and sensitivity of the output. The role of unsteadiness such as heat storage within the mixed layer has a large impact on ice melting or formation. Feedback between the atmosphere and ice is responsive and depends not only on atmospheric forcing but the underlying ocean structure. The original document contains color images. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
author |
Swick, William A. |
author_facet |
Swick, William A. |
author_sort |
Swick, William A. |
title |
High Latitude Coupled Sea-Ice-Air Thermodynamics |
title_short |
High Latitude Coupled Sea-Ice-Air Thermodynamics |
title_full |
High Latitude Coupled Sea-Ice-Air Thermodynamics |
title_fullStr |
High Latitude Coupled Sea-Ice-Air Thermodynamics |
title_full_unstemmed |
High Latitude Coupled Sea-Ice-Air Thermodynamics |
title_sort |
high latitude coupled sea-ice-air thermodynamics |
publishDate |
2004 |
url |
http://www.dtic.mil/docs/citations/ADA427275 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA427275 |
long_lat |
ENVELOPE(164.283,164.283,-78.033,-78.033) |
geographic |
Arctic Arctic Ocean Garwood Greenland |
geographic_facet |
Arctic Arctic Ocean Garwood Greenland |
genre |
Arctic Arctic Ocean Greenland Greenland Sea Sea ice Surface Heat Budget of the Arctic Ocean |
genre_facet |
Arctic Arctic Ocean Greenland Greenland Sea Sea ice Surface Heat Budget of the Arctic Ocean |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA427275 |
op_rights |
Availability: This document is not available from DTIC in microfiche. |
_version_ |
1766342821303812096 |