Improved Upper Ocean/Sea Ice Modeling in the GISS GCM for Investigating Climate Change
This project built on our previous results in which we highlighted the importance of sea ice in overall climate sensitivity by determining that for both warming and cooling climates, when sea ice was not allowed to change, climate sensitivity was reduced by 35-40%. We also modified the Goddard Insti...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19990024954 2023-05-15T14:04:38+02:00 Improved Upper Ocean/Sea Ice Modeling in the GISS GCM for Investigating Climate Change Unclassified, Unlimited, Publicly available [1997] application/pdf http://hdl.handle.net/2060/19990024954 unknown Document ID: 19990024954 http://hdl.handle.net/2060/19990024954 No Copyright CASI Environment Pollution 1997 ftnasantrs 2019-07-21T08:01:34Z This project built on our previous results in which we highlighted the importance of sea ice in overall climate sensitivity by determining that for both warming and cooling climates, when sea ice was not allowed to change, climate sensitivity was reduced by 35-40%. We also modified the Goddard Institute for Space Studies (GISS) 8 deg x lO deg atmospheric General Circulation Model (GCM) to include an upper-ocean/sea-ice model involving the Semtner three-layer ice/snow thermodynamic model, the Price et al. (1986) ocean mixed layer model and a general upper ocean vertical advection/diffusion scheme for maintaining and fluxing properties across the pycnocline. This effort, in addition to improving the sea ice representation in the AGCM, revealed a number of sensitive components of the sea ice/ocean system. For example, the ability to flux heat through the ice/snow properly is critical in order to resolve the surface temperature properly, since small errors in this lead to unrestrained climate drift. The present project, summarized in this report, had as its objectives: (1) introducing a series of sea ice and ocean improvements aimed at overcoming remaining weaknesses in the GCM sea ice/ocean representation, and (2) performing a series of sensitivity experiments designed to evaluate the climate sensitivity of the revised model to both Antarctic and Arctic sea ice, determine the sensitivity of the climate response to initial ice distribution, and investigate the transient response to doubling CO2. Other/Unknown Material Antarc* Antarctic Arctic Climate change Sea ice NASA Technical Reports Server (NTRS) Antarctic Arctic |
institution |
Open Polar |
collection |
NASA Technical Reports Server (NTRS) |
op_collection_id |
ftnasantrs |
language |
unknown |
topic |
Environment Pollution |
spellingShingle |
Environment Pollution Improved Upper Ocean/Sea Ice Modeling in the GISS GCM for Investigating Climate Change |
topic_facet |
Environment Pollution |
description |
This project built on our previous results in which we highlighted the importance of sea ice in overall climate sensitivity by determining that for both warming and cooling climates, when sea ice was not allowed to change, climate sensitivity was reduced by 35-40%. We also modified the Goddard Institute for Space Studies (GISS) 8 deg x lO deg atmospheric General Circulation Model (GCM) to include an upper-ocean/sea-ice model involving the Semtner three-layer ice/snow thermodynamic model, the Price et al. (1986) ocean mixed layer model and a general upper ocean vertical advection/diffusion scheme for maintaining and fluxing properties across the pycnocline. This effort, in addition to improving the sea ice representation in the AGCM, revealed a number of sensitive components of the sea ice/ocean system. For example, the ability to flux heat through the ice/snow properly is critical in order to resolve the surface temperature properly, since small errors in this lead to unrestrained climate drift. The present project, summarized in this report, had as its objectives: (1) introducing a series of sea ice and ocean improvements aimed at overcoming remaining weaknesses in the GCM sea ice/ocean representation, and (2) performing a series of sensitivity experiments designed to evaluate the climate sensitivity of the revised model to both Antarctic and Arctic sea ice, determine the sensitivity of the climate response to initial ice distribution, and investigate the transient response to doubling CO2. |
title |
Improved Upper Ocean/Sea Ice Modeling in the GISS GCM for Investigating Climate Change |
title_short |
Improved Upper Ocean/Sea Ice Modeling in the GISS GCM for Investigating Climate Change |
title_full |
Improved Upper Ocean/Sea Ice Modeling in the GISS GCM for Investigating Climate Change |
title_fullStr |
Improved Upper Ocean/Sea Ice Modeling in the GISS GCM for Investigating Climate Change |
title_full_unstemmed |
Improved Upper Ocean/Sea Ice Modeling in the GISS GCM for Investigating Climate Change |
title_sort |
improved upper ocean/sea ice modeling in the giss gcm for investigating climate change |
publishDate |
1997 |
url |
http://hdl.handle.net/2060/19990024954 |
op_coverage |
Unclassified, Unlimited, Publicly available |
geographic |
Antarctic Arctic |
geographic_facet |
Antarctic Arctic |
genre |
Antarc* Antarctic Arctic Climate change Sea ice |
genre_facet |
Antarc* Antarctic Arctic Climate change Sea ice |
op_source |
CASI |
op_relation |
Document ID: 19990024954 http://hdl.handle.net/2060/19990024954 |
op_rights |
No Copyright |
_version_ |
1766275854248181760 |