High Resolution Simulations of Arctic Sea Ice, 1979-1993
To evaluate improvements in modelling Arctic sea ice, we compare results from two regional models at 1/120 horizontal resolution. The first is a coupled ice-ocean model of the Arctic Ocean, consisting of an ocean model (adapted from the Parallel Ocean Program, Los Alamos National Laboratory [LANL])...
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ftdtic:ADP023555 2023-05-15T14:51:17+02:00 High Resolution Simulations of Arctic Sea Ice, 1979-1993 Maslowski, Wieslaw Lipscomb, William H. NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OCEANOGRAPHY 2003 text/html http://www.dtic.mil/docs/citations/ADP023555 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP023555 en eng http://www.dtic.mil/docs/citations/ADP023555 Approved for public release; distribution is unlimited. DTIC Physical and Dynamic Oceanography Snow Ice and Permafrost Computer Programming and Software Meteorology *COMPUTERIZED SIMULATION *SEA ICE *ARCTIC OCEAN OCEAN CURRENTS SYNTHETIC APERTURE RADAR SATELLITE IMAGERY RADAR IMAGES OCEAN MODELS WORKSHOPS COMPONENT REPORTS SEA ICE MODELING Text 2003 ftdtic 2016-02-22T11:26:27Z To evaluate improvements in modelling Arctic sea ice, we compare results from two regional models at 1/120 horizontal resolution. The first is a coupled ice-ocean model of the Arctic Ocean, consisting of an ocean model (adapted from the Parallel Ocean Program, Los Alamos National Laboratory [LANL]) and the "old" sea ice model. The second model uses the same grid but consists of an improved "new" sea ice model (LANL/ CICE) with a simple ocean mixed layer. Both models are forced with European Center for Medium-range Weather Forecasts reanalysis data for 1979-1993. A comparison of the two sea ice models focuses on the winter of 1987 to emphasize the internal ice stress and to minimize biases towards a particular Arctic climate regime. The "new" sea ice model gives improved ice deformation and drift fields. These improvements are associated at least in part with the multi-category representation of the ice thickness distribution and more realistic parameterization of the ice strength. Long, narrow features in ice divergence and shear fields resemble those observed in SAR imagery, except that their average width is overestimated, possibly due to insufficient horizontal resolution. We also compare the mean sea ice drift and its decadal variability in two "old" sea ice models at different horizontal resolutions: 18-km and 9-km. We find no significant change in ice drift between the two models, except in areas of significant ice-ocean interactions due to more realistic ocean currents and water mass properties in the 9-km model. The original document contains color images. Presented at the Workshop on Sea Ice Extent and the Global Climate System held in Toulouse, France on 15-17 April 2002. Published in Polar Research, v22 n1 p67-74, 2003. ISSN 0800-0395 This article is from ADA471691 Proceedings of the Workshop on Sea Ice Extent and the Global Climate System Held in Toulouse, France on April 15-17, 2002 Text Arctic Arctic Ocean Ice permafrost Sea ice Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Physical and Dynamic Oceanography Snow Ice and Permafrost Computer Programming and Software Meteorology *COMPUTERIZED SIMULATION *SEA ICE *ARCTIC OCEAN OCEAN CURRENTS SYNTHETIC APERTURE RADAR SATELLITE IMAGERY RADAR IMAGES OCEAN MODELS WORKSHOPS COMPONENT REPORTS SEA ICE MODELING |
spellingShingle |
Physical and Dynamic Oceanography Snow Ice and Permafrost Computer Programming and Software Meteorology *COMPUTERIZED SIMULATION *SEA ICE *ARCTIC OCEAN OCEAN CURRENTS SYNTHETIC APERTURE RADAR SATELLITE IMAGERY RADAR IMAGES OCEAN MODELS WORKSHOPS COMPONENT REPORTS SEA ICE MODELING Maslowski, Wieslaw Lipscomb, William H. High Resolution Simulations of Arctic Sea Ice, 1979-1993 |
topic_facet |
Physical and Dynamic Oceanography Snow Ice and Permafrost Computer Programming and Software Meteorology *COMPUTERIZED SIMULATION *SEA ICE *ARCTIC OCEAN OCEAN CURRENTS SYNTHETIC APERTURE RADAR SATELLITE IMAGERY RADAR IMAGES OCEAN MODELS WORKSHOPS COMPONENT REPORTS SEA ICE MODELING |
description |
To evaluate improvements in modelling Arctic sea ice, we compare results from two regional models at 1/120 horizontal resolution. The first is a coupled ice-ocean model of the Arctic Ocean, consisting of an ocean model (adapted from the Parallel Ocean Program, Los Alamos National Laboratory [LANL]) and the "old" sea ice model. The second model uses the same grid but consists of an improved "new" sea ice model (LANL/ CICE) with a simple ocean mixed layer. Both models are forced with European Center for Medium-range Weather Forecasts reanalysis data for 1979-1993. A comparison of the two sea ice models focuses on the winter of 1987 to emphasize the internal ice stress and to minimize biases towards a particular Arctic climate regime. The "new" sea ice model gives improved ice deformation and drift fields. These improvements are associated at least in part with the multi-category representation of the ice thickness distribution and more realistic parameterization of the ice strength. Long, narrow features in ice divergence and shear fields resemble those observed in SAR imagery, except that their average width is overestimated, possibly due to insufficient horizontal resolution. We also compare the mean sea ice drift and its decadal variability in two "old" sea ice models at different horizontal resolutions: 18-km and 9-km. We find no significant change in ice drift between the two models, except in areas of significant ice-ocean interactions due to more realistic ocean currents and water mass properties in the 9-km model. The original document contains color images. Presented at the Workshop on Sea Ice Extent and the Global Climate System held in Toulouse, France on 15-17 April 2002. Published in Polar Research, v22 n1 p67-74, 2003. ISSN 0800-0395 This article is from ADA471691 Proceedings of the Workshop on Sea Ice Extent and the Global Climate System Held in Toulouse, France on April 15-17, 2002 |
author2 |
NAVAL POSTGRADUATE SCHOOL MONTEREY CA DEPT OF OCEANOGRAPHY |
format |
Text |
author |
Maslowski, Wieslaw Lipscomb, William H. |
author_facet |
Maslowski, Wieslaw Lipscomb, William H. |
author_sort |
Maslowski, Wieslaw |
title |
High Resolution Simulations of Arctic Sea Ice, 1979-1993 |
title_short |
High Resolution Simulations of Arctic Sea Ice, 1979-1993 |
title_full |
High Resolution Simulations of Arctic Sea Ice, 1979-1993 |
title_fullStr |
High Resolution Simulations of Arctic Sea Ice, 1979-1993 |
title_full_unstemmed |
High Resolution Simulations of Arctic Sea Ice, 1979-1993 |
title_sort |
high resolution simulations of arctic sea ice, 1979-1993 |
publishDate |
2003 |
url |
http://www.dtic.mil/docs/citations/ADP023555 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP023555 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Ice permafrost Sea ice |
genre_facet |
Arctic Arctic Ocean Ice permafrost Sea ice |
op_source |
DTIC |
op_relation |
http://www.dtic.mil/docs/citations/ADP023555 |
op_rights |
Approved for public release; distribution is unlimited. |
_version_ |
1766322334844583936 |