Development of a Large-Scale Coupled Sea-Ice Model for Interannual Simulations of Ice Cover in the Arctic
A coupled ice-ocean numerical model is developed which improves the simulation of the annual cycle and interannual variations in ice cover in the Arctic. Although the accuracy of the simulated ice concentration is increased, the annual cycle of ice coverage is still exaggerated. Several experiments...
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ftdtic:ADA223670 2023-05-15T13:10:59+02:00 Development of a Large-Scale Coupled Sea-Ice Model for Interannual Simulations of Ice Cover in the Arctic Fleming, Gordon H. NAVAL POSTGRADUATE SCHOOL MONTEREY CA 1989-09 text/html http://www.dtic.mil/docs/citations/ADA223670 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA223670 en eng http://www.dtic.mil/docs/citations/ADA223670 Approved for public release; distribution is unlimited. DTIC AND NTIS Snow Ice and Permafrost *ICE FORECASTING *OCEAN MODELS *ARCTIC REGIONS *SEA ICE OCEAN CURRENTS EDGES ACCURACY THESES SENSITIVITY SURFACES MATHEMATICAL PREDICTION CONCENTRATION(COMPOSITION) COVERINGS HEAT HEAT FLUX SUBSURFACE ALBEDO THICKNESS SIMULATION PACK ICE MATHEMATICAL MODELS COUPLING(INTERACTION) Text 1989 ftdtic 2016-02-23T01:24:45Z A coupled ice-ocean numerical model is developed which improves the simulation of the annual cycle and interannual variations in ice cover in the Arctic. Although the accuracy of the simulated ice concentration is increased, the annual cycle of ice coverage is still exaggerated. Several experiments are conducted to determine the importance of incorporating a fully interactive ocean. Inclusion of a fully prognostic ocean component vice a ten-year mean ocean cycle in the model improves the correlation of simulated ice concentration fields with observed data. This is the case for all regions in the Arctic; for both the annual cycle and interannual variations of the ice cover. In contrast to results using ice models without a fully prognostic ocean component, this model is quite insensitive to changes in the frozen surface albedo. Exceptions are evident where the ocean heat flux into the mixed layer is small and the ice is thin. At the spatial (110 km) and temporal (monthly) scales used here, the heat provided by the ocean appears to be the dominant mechanism controlling the position of the ice edge and the extent of the ice pack. Within the pack, it is the dynamic forcing and, in particular, the wind forcing which controls the ice thickness and thickness distribution. The ocean circulation below the mixed layer appears to position the heat underneath the MIZ. The MIZ is also the region where the ice thickness tends to decrease through divergence. The linkage between the subsurface heat and the thinned ice cover is apparently controlled by conditions at the surface and the resulting response of the mixed layer. Keywords: Theses; Arctic regions; Sea ice; Mathematical models/prediction; Ice forecasting; Ocean models. Text albedo Arctic Ice ice pack permafrost Sea ice Defense Technical Information Center: DTIC Technical Reports database Arctic |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Snow Ice and Permafrost *ICE FORECASTING *OCEAN MODELS *ARCTIC REGIONS *SEA ICE OCEAN CURRENTS EDGES ACCURACY THESES SENSITIVITY SURFACES MATHEMATICAL PREDICTION CONCENTRATION(COMPOSITION) COVERINGS HEAT HEAT FLUX SUBSURFACE ALBEDO THICKNESS SIMULATION PACK ICE MATHEMATICAL MODELS COUPLING(INTERACTION) |
spellingShingle |
Snow Ice and Permafrost *ICE FORECASTING *OCEAN MODELS *ARCTIC REGIONS *SEA ICE OCEAN CURRENTS EDGES ACCURACY THESES SENSITIVITY SURFACES MATHEMATICAL PREDICTION CONCENTRATION(COMPOSITION) COVERINGS HEAT HEAT FLUX SUBSURFACE ALBEDO THICKNESS SIMULATION PACK ICE MATHEMATICAL MODELS COUPLING(INTERACTION) Fleming, Gordon H. Development of a Large-Scale Coupled Sea-Ice Model for Interannual Simulations of Ice Cover in the Arctic |
topic_facet |
Snow Ice and Permafrost *ICE FORECASTING *OCEAN MODELS *ARCTIC REGIONS *SEA ICE OCEAN CURRENTS EDGES ACCURACY THESES SENSITIVITY SURFACES MATHEMATICAL PREDICTION CONCENTRATION(COMPOSITION) COVERINGS HEAT HEAT FLUX SUBSURFACE ALBEDO THICKNESS SIMULATION PACK ICE MATHEMATICAL MODELS COUPLING(INTERACTION) |
description |
A coupled ice-ocean numerical model is developed which improves the simulation of the annual cycle and interannual variations in ice cover in the Arctic. Although the accuracy of the simulated ice concentration is increased, the annual cycle of ice coverage is still exaggerated. Several experiments are conducted to determine the importance of incorporating a fully interactive ocean. Inclusion of a fully prognostic ocean component vice a ten-year mean ocean cycle in the model improves the correlation of simulated ice concentration fields with observed data. This is the case for all regions in the Arctic; for both the annual cycle and interannual variations of the ice cover. In contrast to results using ice models without a fully prognostic ocean component, this model is quite insensitive to changes in the frozen surface albedo. Exceptions are evident where the ocean heat flux into the mixed layer is small and the ice is thin. At the spatial (110 km) and temporal (monthly) scales used here, the heat provided by the ocean appears to be the dominant mechanism controlling the position of the ice edge and the extent of the ice pack. Within the pack, it is the dynamic forcing and, in particular, the wind forcing which controls the ice thickness and thickness distribution. The ocean circulation below the mixed layer appears to position the heat underneath the MIZ. The MIZ is also the region where the ice thickness tends to decrease through divergence. The linkage between the subsurface heat and the thinned ice cover is apparently controlled by conditions at the surface and the resulting response of the mixed layer. Keywords: Theses; Arctic regions; Sea ice; Mathematical models/prediction; Ice forecasting; Ocean models. |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA |
format |
Text |
author |
Fleming, Gordon H. |
author_facet |
Fleming, Gordon H. |
author_sort |
Fleming, Gordon H. |
title |
Development of a Large-Scale Coupled Sea-Ice Model for Interannual Simulations of Ice Cover in the Arctic |
title_short |
Development of a Large-Scale Coupled Sea-Ice Model for Interannual Simulations of Ice Cover in the Arctic |
title_full |
Development of a Large-Scale Coupled Sea-Ice Model for Interannual Simulations of Ice Cover in the Arctic |
title_fullStr |
Development of a Large-Scale Coupled Sea-Ice Model for Interannual Simulations of Ice Cover in the Arctic |
title_full_unstemmed |
Development of a Large-Scale Coupled Sea-Ice Model for Interannual Simulations of Ice Cover in the Arctic |
title_sort |
development of a large-scale coupled sea-ice model for interannual simulations of ice cover in the arctic |
publishDate |
1989 |
url |
http://www.dtic.mil/docs/citations/ADA223670 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADA223670 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
albedo Arctic Ice ice pack permafrost Sea ice |
genre_facet |
albedo Arctic Ice ice pack permafrost Sea ice |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADA223670 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766245503621660672 |