Ocean modeling of the North Atlantic
Present modeling of the North Atlantic is inadequate and can be improved in a number of ways. A number of important physical processes are listed in five categories from the viewpoints of how they are treated in isolation, how they are usually represented in present ocean basin models, and how they...
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1984
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ftnasantrs:oai:casi.ntrs.nasa.gov:19850017728 2023-05-15T17:29:11+02:00 Ocean modeling of the North Atlantic Seminar, A. J. Unclassified, Unlimited, Publicly available Dec 1, 1984 http://ntrs.nasa.gov/search.jsp?R=19850017728 unknown http://ntrs.nasa.gov/search.jsp?R=19850017728 Accession ID: 85N26039 No Copyright CASI 48 NASA. Goddard Inst. for Space Studies North Atlantic Deep Water Formation; p 33-35 1984 ftnasantrs 2012-02-15T16:07:17Z Present modeling of the North Atlantic is inadequate and can be improved in a number of ways. A number of important physical processes are listed in five categories from the viewpoints of how they are treated in isolation, how they are usually represented in present ocean basin models, and how they may be better represented in future models. In the first two categories of vertical boundary processes and internal vertical mixing, parameterizations exist which can easily be incorporated into models and which will have important effects on the simulated structure of the North Atlantic. For the third catagory (mesoscale eddy effects), adequate parameterizations do not exist; but the order of magnitude of the effects is known from observational and process-model studies. A horizontal grid spacing of 100 km or less in required to allow parameterizations with this order of magnitude, as well as to resolve the time-averaged ocean fields. In the fourth category of large scale transports improvements are suggested by way of increased vertical resolution and by the requirement that lateral mixing due to eddies takes place on isopycnal surfaces. Model incorporation of the latter phenomenta is underway. In the fifth category of miscellaneous high-latitude processes, formulations for the treatment of sea ice are available for use. However, the treatment of gravitational instability, which is crucial to deepwater formation in the Atlantic Ocean, will require additional refinements to account for the unresolved physics of chimney formations in the open ocean and buoyant plumes near ocean boundaries. Other/Unknown Material North Atlantic Sea ice NASA Technical Reports Server (NTRS) |
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NASA Technical Reports Server (NTRS) |
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ftnasantrs |
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48 |
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48 Seminar, A. J. Ocean modeling of the North Atlantic |
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48 |
description |
Present modeling of the North Atlantic is inadequate and can be improved in a number of ways. A number of important physical processes are listed in five categories from the viewpoints of how they are treated in isolation, how they are usually represented in present ocean basin models, and how they may be better represented in future models. In the first two categories of vertical boundary processes and internal vertical mixing, parameterizations exist which can easily be incorporated into models and which will have important effects on the simulated structure of the North Atlantic. For the third catagory (mesoscale eddy effects), adequate parameterizations do not exist; but the order of magnitude of the effects is known from observational and process-model studies. A horizontal grid spacing of 100 km or less in required to allow parameterizations with this order of magnitude, as well as to resolve the time-averaged ocean fields. In the fourth category of large scale transports improvements are suggested by way of increased vertical resolution and by the requirement that lateral mixing due to eddies takes place on isopycnal surfaces. Model incorporation of the latter phenomenta is underway. In the fifth category of miscellaneous high-latitude processes, formulations for the treatment of sea ice are available for use. However, the treatment of gravitational instability, which is crucial to deepwater formation in the Atlantic Ocean, will require additional refinements to account for the unresolved physics of chimney formations in the open ocean and buoyant plumes near ocean boundaries. |
format |
Other/Unknown Material |
author |
Seminar, A. J. |
author_facet |
Seminar, A. J. |
author_sort |
Seminar, A. J. |
title |
Ocean modeling of the North Atlantic |
title_short |
Ocean modeling of the North Atlantic |
title_full |
Ocean modeling of the North Atlantic |
title_fullStr |
Ocean modeling of the North Atlantic |
title_full_unstemmed |
Ocean modeling of the North Atlantic |
title_sort |
ocean modeling of the north atlantic |
publishDate |
1984 |
url |
http://ntrs.nasa.gov/search.jsp?R=19850017728 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
North Atlantic Sea ice |
genre_facet |
North Atlantic Sea ice |
op_source |
CASI |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19850017728 Accession ID: 85N26039 |
op_rights |
No Copyright |
_version_ |
1766122834887704576 |