Possible sea ice impacts on oceanic deep convection
Many regions of the world ocean known or suspected to have deep convection are sea-ice covered for at least a portion of the annual cycle. As this suggests that sea ice might have some impact on generating or maintaining this phenomenon, several mechanisms by which sea ice could exert an influence a...
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ftnasantrs:oai:casi.ntrs.nasa.gov:19850017730 2023-05-15T18:16:20+02:00 Possible sea ice impacts on oceanic deep convection Parkinson, C. L. Unclassified, Unlimited, Publicly available Dec 1, 1984 http://ntrs.nasa.gov/search.jsp?R=19850017730 unknown http://ntrs.nasa.gov/search.jsp?R=19850017730 Accession ID: 85N26041 No Copyright CASI 48 NASA. Goddard Inst. for Space Studies North Atlantic Deep Water Formation; p 39-41 1984 ftnasantrs 2012-02-15T16:07:17Z Many regions of the world ocean known or suspected to have deep convection are sea-ice covered for at least a portion of the annual cycle. As this suggests that sea ice might have some impact on generating or maintaining this phenomenon, several mechanisms by which sea ice could exert an influence are presented in the following paragraphs. Sea ice formation could be a direct causal factor in deep convection by providing the surface density increase necessary to initiate the convective overturning. As sea ice forms, either by ice accretion or by in situ ice formation in open water or in lead areas between ice floes, salt is rejected to the underlying water. This increases the water salinity, thereby increasing water density in the mixed layer under the ice. A sufficient increase in density will lead to mixing with deeper waters, and perhaps to deep convection or even bottom water formation. Observations are needed to establish whether this process is actually occurring; it is most likely in regions with extensive ice formation and a relatively unstable oceanic density structure. Other/Unknown Material Sea ice NASA Technical Reports Server (NTRS) |
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48 Parkinson, C. L. Possible sea ice impacts on oceanic deep convection |
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48 |
description |
Many regions of the world ocean known or suspected to have deep convection are sea-ice covered for at least a portion of the annual cycle. As this suggests that sea ice might have some impact on generating or maintaining this phenomenon, several mechanisms by which sea ice could exert an influence are presented in the following paragraphs. Sea ice formation could be a direct causal factor in deep convection by providing the surface density increase necessary to initiate the convective overturning. As sea ice forms, either by ice accretion or by in situ ice formation in open water or in lead areas between ice floes, salt is rejected to the underlying water. This increases the water salinity, thereby increasing water density in the mixed layer under the ice. A sufficient increase in density will lead to mixing with deeper waters, and perhaps to deep convection or even bottom water formation. Observations are needed to establish whether this process is actually occurring; it is most likely in regions with extensive ice formation and a relatively unstable oceanic density structure. |
format |
Other/Unknown Material |
author |
Parkinson, C. L. |
author_facet |
Parkinson, C. L. |
author_sort |
Parkinson, C. L. |
title |
Possible sea ice impacts on oceanic deep convection |
title_short |
Possible sea ice impacts on oceanic deep convection |
title_full |
Possible sea ice impacts on oceanic deep convection |
title_fullStr |
Possible sea ice impacts on oceanic deep convection |
title_full_unstemmed |
Possible sea ice impacts on oceanic deep convection |
title_sort |
possible sea ice impacts on oceanic deep convection |
publishDate |
1984 |
url |
http://ntrs.nasa.gov/search.jsp?R=19850017730 |
op_coverage |
Unclassified, Unlimited, Publicly available |
genre |
Sea ice |
genre_facet |
Sea ice |
op_source |
CASI |
op_relation |
http://ntrs.nasa.gov/search.jsp?R=19850017730 Accession ID: 85N26041 |
op_rights |
No Copyright |
_version_ |
1766189888977240064 |