Linkages between Arctic summer circulation regimes and regional sea ice anomalies
The downward trend in overall Arctic summer sea ice extent has been substantial, particularly in the last few decades. Departures in ice extent from year to year can be very large, however, in part due to the high variability in summer atmospheric circulation patterns. Anomalies in the Pacific secto...
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ftucl:oai:eprints.ucl.ac.uk.OAI2:1520428 2023-12-24T10:13:29+01:00 Linkages between Arctic summer circulation regimes and regional sea ice anomalies Lynch, AH Serreze, MC Cassano, EN Crawford, AD Stroeve, J 2016-07-25 text https://discovery.ucl.ac.uk/id/eprint/1520428/1/Stroeve_Lynch_et_al-2016-Journal_of_Geophysical_Research__Atmospheres.pdf https://discovery.ucl.ac.uk/id/eprint/1520428/ eng eng AMER GEOPHYSICAL UNION https://discovery.ucl.ac.uk/id/eprint/1520428/1/Stroeve_Lynch_et_al-2016-Journal_of_Geophysical_Research__Atmospheres.pdf https://discovery.ucl.ac.uk/id/eprint/1520428/ open Journal of Geophysical Research: Atmospheres , 121 (13) pp. 7868-7880. (2016) Science & Technology Physical Sciences Meteorology & Atmospheric Sciences Arctic sea ice Arctic circulation regimes self-organizing maps WIND EVENTS POLAR LOWS ALASKA BARROW VARIABILITY CLIMATOLOGY PERFORMANCE CONTEXT MOTION Article 2016 ftucl 2023-11-27T13:07:32Z The downward trend in overall Arctic summer sea ice extent has been substantial, particularly in the last few decades. Departures in ice extent from year to year can be very large, however, in part due to the high variability in summer atmospheric circulation patterns. Anomalies in the Pacific sector ice cover can be partially compensated by anomalies of opposite sign in the Atlantic sector. An assessment of linkages between summer atmospheric patterns and sectoral anomalies in the area of maximum open water north of 70°N demonstrates that there is asymmetry in the mechanisms. Years with low ice extent and high open water fraction are uniformly associated with positive temperature anomalies and southerly flow in both the Atlantic and Pacific sectors. However, years with high extent and low open water fraction in both sectors reveal two dominant mechanisms. Some years with anomalously low maximum open water fraction are associated with negative temperature anomalies and southerly transport—a cool summer pattern that allows ice to persist over larger areas. However, other low open water years are characterized by an “ice factory” mechanism, whereby—even when melting—ice cover is continually replenished by advection from the north. Article in Journal/Newspaper Arctic Barrow Sea ice Alaska University College London: UCL Discovery Arctic Pacific |
institution |
Open Polar |
collection |
University College London: UCL Discovery |
op_collection_id |
ftucl |
language |
English |
topic |
Science & Technology Physical Sciences Meteorology & Atmospheric Sciences Arctic sea ice Arctic circulation regimes self-organizing maps WIND EVENTS POLAR LOWS ALASKA BARROW VARIABILITY CLIMATOLOGY PERFORMANCE CONTEXT MOTION |
spellingShingle |
Science & Technology Physical Sciences Meteorology & Atmospheric Sciences Arctic sea ice Arctic circulation regimes self-organizing maps WIND EVENTS POLAR LOWS ALASKA BARROW VARIABILITY CLIMATOLOGY PERFORMANCE CONTEXT MOTION Lynch, AH Serreze, MC Cassano, EN Crawford, AD Stroeve, J Linkages between Arctic summer circulation regimes and regional sea ice anomalies |
topic_facet |
Science & Technology Physical Sciences Meteorology & Atmospheric Sciences Arctic sea ice Arctic circulation regimes self-organizing maps WIND EVENTS POLAR LOWS ALASKA BARROW VARIABILITY CLIMATOLOGY PERFORMANCE CONTEXT MOTION |
description |
The downward trend in overall Arctic summer sea ice extent has been substantial, particularly in the last few decades. Departures in ice extent from year to year can be very large, however, in part due to the high variability in summer atmospheric circulation patterns. Anomalies in the Pacific sector ice cover can be partially compensated by anomalies of opposite sign in the Atlantic sector. An assessment of linkages between summer atmospheric patterns and sectoral anomalies in the area of maximum open water north of 70°N demonstrates that there is asymmetry in the mechanisms. Years with low ice extent and high open water fraction are uniformly associated with positive temperature anomalies and southerly flow in both the Atlantic and Pacific sectors. However, years with high extent and low open water fraction in both sectors reveal two dominant mechanisms. Some years with anomalously low maximum open water fraction are associated with negative temperature anomalies and southerly transport—a cool summer pattern that allows ice to persist over larger areas. However, other low open water years are characterized by an “ice factory” mechanism, whereby—even when melting—ice cover is continually replenished by advection from the north. |
format |
Article in Journal/Newspaper |
author |
Lynch, AH Serreze, MC Cassano, EN Crawford, AD Stroeve, J |
author_facet |
Lynch, AH Serreze, MC Cassano, EN Crawford, AD Stroeve, J |
author_sort |
Lynch, AH |
title |
Linkages between Arctic summer circulation regimes and regional sea ice anomalies |
title_short |
Linkages between Arctic summer circulation regimes and regional sea ice anomalies |
title_full |
Linkages between Arctic summer circulation regimes and regional sea ice anomalies |
title_fullStr |
Linkages between Arctic summer circulation regimes and regional sea ice anomalies |
title_full_unstemmed |
Linkages between Arctic summer circulation regimes and regional sea ice anomalies |
title_sort |
linkages between arctic summer circulation regimes and regional sea ice anomalies |
publisher |
AMER GEOPHYSICAL UNION |
publishDate |
2016 |
url |
https://discovery.ucl.ac.uk/id/eprint/1520428/1/Stroeve_Lynch_et_al-2016-Journal_of_Geophysical_Research__Atmospheres.pdf https://discovery.ucl.ac.uk/id/eprint/1520428/ |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Barrow Sea ice Alaska |
genre_facet |
Arctic Barrow Sea ice Alaska |
op_source |
Journal of Geophysical Research: Atmospheres , 121 (13) pp. 7868-7880. (2016) |
op_relation |
https://discovery.ucl.ac.uk/id/eprint/1520428/1/Stroeve_Lynch_et_al-2016-Journal_of_Geophysical_Research__Atmospheres.pdf https://discovery.ucl.ac.uk/id/eprint/1520428/ |
op_rights |
open |
_version_ |
1786183131787689984 |