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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ftnavalpschool:oai:calhoun.nps.edu:10945/56229 2024-06-09T07:42:19+00:00 High resolution simulations of Arctic Sea ice, 1979-1993 Maslowski, Wieslaw Lipscomb, William H. Naval Postgraduate School (U.S.) Oceanography 2002-04 8 p. application/pdf https://hdl.handle.net/10945/56229 unknown W. Maslowski, W.H. Lipscomb, "High resolutions simulations of Arctic sea ice, 1979-1993", Polar Research, v.22, no.1 (2003), pp. 67-74 https://hdl.handle.net/10945/56229 This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. Article 2002 ftnavalpschool 2024-05-15T00:47:40Z 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 Centre 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. Department of energy Climate Change Prediction Program National Science Foundation Arctic System Science Program Office of Naval Research High Latitude Dynamics Program. Article in Journal/Newspaper Arctic Arctic Arctic Ocean Climate change Polar Research Sea ice Naval Postgraduate School: Calhoun Arctic Arctic Ocean |
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Naval Postgraduate School: Calhoun |
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ftnavalpschool |
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unknown |
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 Centre 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. Department of energy Climate Change Prediction Program National Science Foundation Arctic System Science Program Office of Naval Research High Latitude Dynamics Program. |
author2 |
Naval Postgraduate School (U.S.) Oceanography |
format |
Article in Journal/Newspaper |
author |
Maslowski, Wieslaw Lipscomb, William H. |
spellingShingle |
Maslowski, Wieslaw Lipscomb, William H. High resolution simulations of Arctic Sea ice, 1979-1993 |
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 |
2002 |
url |
https://hdl.handle.net/10945/56229 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Arctic Ocean Climate change Polar Research Sea ice |
genre_facet |
Arctic Arctic Arctic Ocean Climate change Polar Research Sea ice |
op_relation |
W. Maslowski, W.H. Lipscomb, "High resolutions simulations of Arctic sea ice, 1979-1993", Polar Research, v.22, no.1 (2003), pp. 67-74 https://hdl.handle.net/10945/56229 |
op_rights |
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States. |
_version_ |
1801371239303872512 |