Late Pleistocene variations in Antarctica sea ice. I - Effect of orbital isolation changes. II - Effect of interhemispheric deep-ocean heat exchange

A dynamic-thermodynamic sea-ice model is presently used to ascertain the effects of orbitally-induced insolation changes on Antarctic sea-ice cover; the results thus obtained are compared with modified CLIMAP reconstructions of sea-ice 18,000 years ago. The minor influence exerted by insolation on P...

Full description

Bibliographic Details
Main Authors: Crowley, Thomas J., Parkinson, Claire L.
Format: Other/Unknown Material
Language:unknown
Published: 1988
Subjects:
48
Antarctic
Antarc*
Antarctica
North Atlantic Deep Water
North Atlantic
Sea ice
Online Access:http://ntrs.nasa.gov/search.jsp?R=19900040276
id ftnasantrs:oai:casi.ntrs.nasa.gov:19900040276
record_format openpolar
spelling ftnasantrs:oai:casi.ntrs.nasa.gov:19900040276 2023-05-15T14:04:33+02:00 Late Pleistocene variations in Antarctica sea ice. I - Effect of orbital isolation changes. II - Effect of interhemispheric deep-ocean heat exchange Crowley, Thomas J. Parkinson, Claire L. Unclassified, Unlimited, Publicly available Oct 1, 1988 http://ntrs.nasa.gov/search.jsp?R=19900040276 unknown http://ntrs.nasa.gov/search.jsp?R=19900040276 Accession ID: 90A27331 Copyright Other Sources 48 Climate Dynamics; 3; 85-91 1988 ftnasantrs 2012-02-15T18:27:31Z A dynamic-thermodynamic sea-ice model is presently used to ascertain the effects of orbitally-induced insolation changes on Antarctic sea-ice cover; the results thus obtained are compared with modified CLIMAP reconstructions of sea-ice 18,000 years ago. The minor influence exerted by insolation on Pleistocene sea-ice distributions is attributable to a number of factors. In the second part of this investigation, variations in the production of warm North Atlantic Deep Water are proposed as a mechanism constituting the linkage between climate fluctuations in the Northern and Southern hemispheres during the Pleistocene; this hypothesis is tested by examining the sensitivity of the dynamic-thermodynamic model for Antarctic sea-ice changes in vertical ocean heat flux, and comparing the simulations with modified CLIMAP sea-ice maps for 18,000 years ago. Other/Unknown Material Antarc* Antarctic Antarctica North Atlantic Deep Water North Atlantic Sea ice NASA Technical Reports Server (NTRS) Antarctic
institution Open Polar
collection NASA Technical Reports Server (NTRS)
op_collection_id ftnasantrs
language unknown
topic 48
spellingShingle 48
Crowley, Thomas J.
Parkinson, Claire L.
Late Pleistocene variations in Antarctica sea ice. I - Effect of orbital isolation changes. II - Effect of interhemispheric deep-ocean heat exchange
topic_facet 48
description A dynamic-thermodynamic sea-ice model is presently used to ascertain the effects of orbitally-induced insolation changes on Antarctic sea-ice cover; the results thus obtained are compared with modified CLIMAP reconstructions of sea-ice 18,000 years ago. The minor influence exerted by insolation on Pleistocene sea-ice distributions is attributable to a number of factors. In the second part of this investigation, variations in the production of warm North Atlantic Deep Water are proposed as a mechanism constituting the linkage between climate fluctuations in the Northern and Southern hemispheres during the Pleistocene; this hypothesis is tested by examining the sensitivity of the dynamic-thermodynamic model for Antarctic sea-ice changes in vertical ocean heat flux, and comparing the simulations with modified CLIMAP sea-ice maps for 18,000 years ago.
format Other/Unknown Material
author Crowley, Thomas J.
Parkinson, Claire L.
author_facet Crowley, Thomas J.
Parkinson, Claire L.
author_sort Crowley, Thomas J.
title Late Pleistocene variations in Antarctica sea ice. I - Effect of orbital isolation changes. II - Effect of interhemispheric deep-ocean heat exchange
title_short Late Pleistocene variations in Antarctica sea ice. I - Effect of orbital isolation changes. II - Effect of interhemispheric deep-ocean heat exchange
title_full Late Pleistocene variations in Antarctica sea ice. I - Effect of orbital isolation changes. II - Effect of interhemispheric deep-ocean heat exchange
title_fullStr Late Pleistocene variations in Antarctica sea ice. I - Effect of orbital isolation changes. II - Effect of interhemispheric deep-ocean heat exchange
title_full_unstemmed Late Pleistocene variations in Antarctica sea ice. I - Effect of orbital isolation changes. II - Effect of interhemispheric deep-ocean heat exchange
title_sort late pleistocene variations in antarctica sea ice. i - effect of orbital isolation changes. ii - effect of interhemispheric deep-ocean heat exchange
publishDate 1988
url http://ntrs.nasa.gov/search.jsp?R=19900040276
op_coverage Unclassified, Unlimited, Publicly available
geographic Antarctic
geographic_facet Antarctic
genre Antarc*
Antarctic
Antarctica
North Atlantic Deep Water
North Atlantic
Sea ice
genre_facet Antarc*
Antarctic
Antarctica
North Atlantic Deep Water
North Atlantic
Sea ice
op_source Other Sources
op_relation http://ntrs.nasa.gov/search.jsp?R=19900040276
Accession ID: 90A27331
op_rights Copyright
_version_ 1766275743510167552

Similar Items