Greenland Sea Ice Anomalies During 1901-1984 and their Relation to an Interdecadal Arctic Climate Cycle
Two ice data sets from the Greenland and neighboring seas have been analyzed to determine interannual and decadal time scale sea ice extent anomalies during this century. Sea ice concentration data on a 1 deg x 1 deg grid for 1953-19 the presence of a large positive anomaly in the Greenland Sea duri...
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ftdtic:ADP007300 2023-05-15T14:52:25+02:00 Greenland Sea Ice Anomalies During 1901-1984 and their Relation to an Interdecadal Arctic Climate Cycle Mysak, L. A. Manak, D. K. Marsden, R. K. MCGILL UNIV MONTREAL (QUEBEC) 1992-03 text/html http://www.dtic.mil/docs/citations/ADP007300 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007300 en eng http://www.dtic.mil/docs/citations/ADP007300 APPROVED FOR PUBLIC RELEASE DTIC AND NTIS Meteorology Snow Ice and Permafrost *CLIMATE *ICE MECHANICS *SEA ICE ANOMALIES ARCTIC OCEAN CIRCULATION CYCLES GRIDS NORTHERN HEMISPHERE OCEANS PROPAGATION RUNOFF SALINITY SURFACE WATERS TRAVEL TIME WATER GREENHOUSE EFFECT *Global climate change Component Reports Text 1992 ftdtic 2016-02-19T17:39:24Z Two ice data sets from the Greenland and neighboring seas have been analyzed to determine interannual and decadal time scale sea ice extent anomalies during this century. Sea ice concentration data on a 1 deg x 1 deg grid for 1953-19 the presence of a large positive anomaly in the Greenland Sea during the 1960s which coincided with the Great Salinity Anomaly, a low-salinity water mass that traveled cyclonically around the northern North Atlantic during 1968-1982. The two anomalies propagated into the Labrador Sea with a typical travel time of 3-5 years. Spring and summer ice-limit data obtained from Danish Meteorological Institute charts for 1901-1956 indicated the presence of heavy ice conditions in the Greenland Sea during 1902-1920 and in the late, 1940s, and generally light ice conditions during the 1920s and 1930s. Only limited evidence of propagation of Greenland Sea ice anomalies into the Labrador Sea was observed, however. On the other hand, several large ice anomalies in the Greenland Sea occurred 2-3 years after large runoffs from northern Canada into the western Arctic Ocean. Similarly, a large runoff into the Arctic preceded the large Greenland Sea ice anomaly of the 1960s. These facts, together with recent evidence of climatic jumps in the Northern Hemisphere tropospheric circulation, suggest the existence of an interdecadal, self-sustained climate cycle in the Arctic which is described in terms of a negative feed-back loop. In the Greenland Sea this cycle is characterized by a state of large sea ice extent overlying a layer of cool freshwater that does not convectively overturn, which alternates with a state of small sea ice extent and warm saline surface water that frequently overturns. This article is from 'Proceedings of the International Conference on the Role of the Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 1990. Volume 1', AD-A253 027, p284-289. See also Volume 2, AD-A253 028. Text Arctic Arctic Ocean Climate change Greenland Greenland Sea Ice Labrador Sea North Atlantic permafrost Sea ice Alaska Defense Technical Information Center: DTIC Technical Reports database Arctic Arctic Ocean Canada Fairbanks Greenland |
institution |
Open Polar |
collection |
Defense Technical Information Center: DTIC Technical Reports database |
op_collection_id |
ftdtic |
language |
English |
topic |
Meteorology Snow Ice and Permafrost *CLIMATE *ICE MECHANICS *SEA ICE ANOMALIES ARCTIC OCEAN CIRCULATION CYCLES GRIDS NORTHERN HEMISPHERE OCEANS PROPAGATION RUNOFF SALINITY SURFACE WATERS TRAVEL TIME WATER GREENHOUSE EFFECT *Global climate change Component Reports |
spellingShingle |
Meteorology Snow Ice and Permafrost *CLIMATE *ICE MECHANICS *SEA ICE ANOMALIES ARCTIC OCEAN CIRCULATION CYCLES GRIDS NORTHERN HEMISPHERE OCEANS PROPAGATION RUNOFF SALINITY SURFACE WATERS TRAVEL TIME WATER GREENHOUSE EFFECT *Global climate change Component Reports Mysak, L. A. Manak, D. K. Marsden, R. K. Greenland Sea Ice Anomalies During 1901-1984 and their Relation to an Interdecadal Arctic Climate Cycle |
topic_facet |
Meteorology Snow Ice and Permafrost *CLIMATE *ICE MECHANICS *SEA ICE ANOMALIES ARCTIC OCEAN CIRCULATION CYCLES GRIDS NORTHERN HEMISPHERE OCEANS PROPAGATION RUNOFF SALINITY SURFACE WATERS TRAVEL TIME WATER GREENHOUSE EFFECT *Global climate change Component Reports |
description |
Two ice data sets from the Greenland and neighboring seas have been analyzed to determine interannual and decadal time scale sea ice extent anomalies during this century. Sea ice concentration data on a 1 deg x 1 deg grid for 1953-19 the presence of a large positive anomaly in the Greenland Sea during the 1960s which coincided with the Great Salinity Anomaly, a low-salinity water mass that traveled cyclonically around the northern North Atlantic during 1968-1982. The two anomalies propagated into the Labrador Sea with a typical travel time of 3-5 years. Spring and summer ice-limit data obtained from Danish Meteorological Institute charts for 1901-1956 indicated the presence of heavy ice conditions in the Greenland Sea during 1902-1920 and in the late, 1940s, and generally light ice conditions during the 1920s and 1930s. Only limited evidence of propagation of Greenland Sea ice anomalies into the Labrador Sea was observed, however. On the other hand, several large ice anomalies in the Greenland Sea occurred 2-3 years after large runoffs from northern Canada into the western Arctic Ocean. Similarly, a large runoff into the Arctic preceded the large Greenland Sea ice anomaly of the 1960s. These facts, together with recent evidence of climatic jumps in the Northern Hemisphere tropospheric circulation, suggest the existence of an interdecadal, self-sustained climate cycle in the Arctic which is described in terms of a negative feed-back loop. In the Greenland Sea this cycle is characterized by a state of large sea ice extent overlying a layer of cool freshwater that does not convectively overturn, which alternates with a state of small sea ice extent and warm saline surface water that frequently overturns. This article is from 'Proceedings of the International Conference on the Role of the Polar Regions in Global Change Held in Fairbanks, Alaska on 11-15 June 1990. Volume 1', AD-A253 027, p284-289. See also Volume 2, AD-A253 028. |
author2 |
MCGILL UNIV MONTREAL (QUEBEC) |
format |
Text |
author |
Mysak, L. A. Manak, D. K. Marsden, R. K. |
author_facet |
Mysak, L. A. Manak, D. K. Marsden, R. K. |
author_sort |
Mysak, L. A. |
title |
Greenland Sea Ice Anomalies During 1901-1984 and their Relation to an Interdecadal Arctic Climate Cycle |
title_short |
Greenland Sea Ice Anomalies During 1901-1984 and their Relation to an Interdecadal Arctic Climate Cycle |
title_full |
Greenland Sea Ice Anomalies During 1901-1984 and their Relation to an Interdecadal Arctic Climate Cycle |
title_fullStr |
Greenland Sea Ice Anomalies During 1901-1984 and their Relation to an Interdecadal Arctic Climate Cycle |
title_full_unstemmed |
Greenland Sea Ice Anomalies During 1901-1984 and their Relation to an Interdecadal Arctic Climate Cycle |
title_sort |
greenland sea ice anomalies during 1901-1984 and their relation to an interdecadal arctic climate cycle |
publishDate |
1992 |
url |
http://www.dtic.mil/docs/citations/ADP007300 http://oai.dtic.mil/oai/oai?&verb=getRecord&metadataPrefix=html&identifier=ADP007300 |
geographic |
Arctic Arctic Ocean Canada Fairbanks Greenland |
geographic_facet |
Arctic Arctic Ocean Canada Fairbanks Greenland |
genre |
Arctic Arctic Ocean Climate change Greenland Greenland Sea Ice Labrador Sea North Atlantic permafrost Sea ice Alaska |
genre_facet |
Arctic Arctic Ocean Climate change Greenland Greenland Sea Ice Labrador Sea North Atlantic permafrost Sea ice Alaska |
op_source |
DTIC AND NTIS |
op_relation |
http://www.dtic.mil/docs/citations/ADP007300 |
op_rights |
APPROVED FOR PUBLIC RELEASE |
_version_ |
1766323662511669248 |