Numerical Modeling of the Vertical Heat Transport Through the Diffusive Layer of the Arctic Ocean
The Arctic Ocean has been a subject of increasing interest in recent years due to the reduction of the sea-ice thickness and spatial coverage and its implications for climate change. The future state of the Arctic is likely to be linked to vertical heat transport by microscale processes, specificall...
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ftdtic:ADA580450 2023-05-15T14:35:08+02:00 Numerical Modeling of the Vertical Heat Transport Through the Diffusive Layer of the Arctic Ocean Lefler, Angela S NAVAL POSTGRADUATE SCHOOL MONTEREY CA 2013-03 text/html http://www.dtic.mil/docs/citations/ADA580450 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA580450 en eng http://www.dtic.mil/docs/citations/ADA580450 Approved for public release; distribution is unlimited. DTIC Meteorology *ARCTIC OCEAN *CLIMATE *HEAT TRANSFER ACCURACY HEAT FLUX MATHEMATICAL MODELS NUMERICAL ANALYSIS THESES Text 2013 ftdtic 2016-02-24T11:23:07Z The Arctic Ocean has been a subject of increasing interest in recent years due to the reduction of the sea-ice thickness and spatial coverage and its implications for climate change. The future state of the Arctic is likely to be linked to vertical heat transport by microscale processes, specifically, double-diffusive convection. A series of realistic three-dimensional direct numerical simulations (DNS) were conducted to assess the vertical heat transport through thermohaline staircases in the Arctic region. Results revealed that vertical fluxes exceeded those of extant four-thirds flux laws by as much as a factor of two, and suggest that the 4/3 exponent requires downward revision. Results also showed that two-dimensional DNS can provide an accurate approximation of heat fluxes when the density ratio is sufficiently large. DNS results also reveal that the models with rigid boundaries result in heat flux estimates that are lower than those from models with periodic boundary conditions. Finally, the DNS-derived flux law was applied to Arctic data and results supported the conclusion that lab-derived flux laws significantly underestimate heat flux. All of these results suggest that vertical heat transport due to double-diffusive convection is a significant contributor to the measured reduction of Arctic sea-ice. Text Arctic Arctic Ocean Climate change Sea ice Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean |
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Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Meteorology *ARCTIC OCEAN *CLIMATE *HEAT TRANSFER ACCURACY HEAT FLUX MATHEMATICAL MODELS NUMERICAL ANALYSIS THESES |
spellingShingle |
Meteorology *ARCTIC OCEAN *CLIMATE *HEAT TRANSFER ACCURACY HEAT FLUX MATHEMATICAL MODELS NUMERICAL ANALYSIS THESES Lefler, Angela S Numerical Modeling of the Vertical Heat Transport Through the Diffusive Layer of the Arctic Ocean |
topic_facet |
Meteorology *ARCTIC OCEAN *CLIMATE *HEAT TRANSFER ACCURACY HEAT FLUX MATHEMATICAL MODELS NUMERICAL ANALYSIS THESES |
description |
The Arctic Ocean has been a subject of increasing interest in recent years due to the reduction of the sea-ice thickness and spatial coverage and its implications for climate change. The future state of the Arctic is likely to be linked to vertical heat transport by microscale processes, specifically, double-diffusive convection. A series of realistic three-dimensional direct numerical simulations (DNS) were conducted to assess the vertical heat transport through thermohaline staircases in the Arctic region. Results revealed that vertical fluxes exceeded those of extant four-thirds flux laws by as much as a factor of two, and suggest that the 4/3 exponent requires downward revision. Results also showed that two-dimensional DNS can provide an accurate approximation of heat fluxes when the density ratio is sufficiently large. DNS results also reveal that the models with rigid boundaries result in heat flux estimates that are lower than those from models with periodic boundary conditions. Finally, the DNS-derived flux law was applied to Arctic data and results supported the conclusion that lab-derived flux laws significantly underestimate heat flux. All of these results suggest that vertical heat transport due to double-diffusive convection is a significant contributor to the measured reduction of Arctic sea-ice. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
author |
Lefler, Angela S |
author_facet |
Lefler, Angela S |
author_sort |
Lefler, Angela S |
title |
Numerical Modeling of the Vertical Heat Transport Through the Diffusive Layer of the Arctic Ocean |
title_short |
Numerical Modeling of the Vertical Heat Transport Through the Diffusive Layer of the Arctic Ocean |
title_full |
Numerical Modeling of the Vertical Heat Transport Through the Diffusive Layer of the Arctic Ocean |
title_fullStr |
Numerical Modeling of the Vertical Heat Transport Through the Diffusive Layer of the Arctic Ocean |
title_full_unstemmed |
Numerical Modeling of the Vertical Heat Transport Through the Diffusive Layer of the Arctic Ocean |
title_sort |
numerical modeling of the vertical heat transport through the diffusive layer of the arctic ocean |
publishDate |
2013 |
url |
http://www.dtic.mil/docs/citations/ADA580450 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA580450 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Sea ice |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADA580450 |
op_rights |
Approved for public release; distribution is unlimited. |
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1766308013670400000 |