Fram Strait spring ice export and September Arctic sea ice

The Arctic Basin exports ~ 10 % of the sea ice area southwards annually through Fram Strait. A larger than normal export decreases the remaining mean thickness and ice area. A new updated timeseries from 1979–2013 of Fram Strait sea ice area export shows an overall increase until today, and that mor...

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Main Authors: Halvorsen, M. H., Smedsrud, L. H., Zhang, R., Kloster, K.
Format: Text
Language:English
Published: 2018
Subjects:
Online Access:https://doi.org/10.5194/tcd-9-4205-2015
https://tc.copernicus.org/preprints/tc-2015-122/
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spelling ftcopernicus:oai:publications.copernicus.org:tcd31208 2023-05-15T14:29:11+02:00 Fram Strait spring ice export and September Arctic sea ice Halvorsen, M. H. Smedsrud, L. H. Zhang, R. Kloster, K. 2018-09-26 application/pdf https://doi.org/10.5194/tcd-9-4205-2015 https://tc.copernicus.org/preprints/tc-2015-122/ eng eng doi:10.5194/tcd-9-4205-2015 https://tc.copernicus.org/preprints/tc-2015-122/ eISSN: 1994-0424 Text 2018 ftcopernicus https://doi.org/10.5194/tcd-9-4205-2015 2020-07-20T16:24:30Z The Arctic Basin exports ~ 10 % of the sea ice area southwards annually through Fram Strait. A larger than normal export decreases the remaining mean thickness and ice area. A new updated timeseries from 1979–2013 of Fram Strait sea ice area export shows an overall increase until today, and that more than 1 million km 2 has been exported annually in recent years. The new timeseries has been constructed from high resolution radar satellite imagery of sea ice drift across 79° N from 2004–2013, regressed on the observed cross-strait surface pressure difference, and shows an increasing trend of 7 % per decade. The trend is caused by higher southward ice drift speeds due to stronger southward geostrophic winds, largely explained by increasing surface pressure on Greenland. Spring and summer area export increases more (~ 14 % per decade) than in autumn and winter, and these export anomalies have a large influence on the following September mean ice extent. Text Arctic Basin Arctic Fram Strait Greenland Sea ice Copernicus Publications: E-Journals Arctic Greenland
institution Open Polar
collection Copernicus Publications: E-Journals
op_collection_id ftcopernicus
language English
description The Arctic Basin exports ~ 10 % of the sea ice area southwards annually through Fram Strait. A larger than normal export decreases the remaining mean thickness and ice area. A new updated timeseries from 1979–2013 of Fram Strait sea ice area export shows an overall increase until today, and that more than 1 million km 2 has been exported annually in recent years. The new timeseries has been constructed from high resolution radar satellite imagery of sea ice drift across 79° N from 2004–2013, regressed on the observed cross-strait surface pressure difference, and shows an increasing trend of 7 % per decade. The trend is caused by higher southward ice drift speeds due to stronger southward geostrophic winds, largely explained by increasing surface pressure on Greenland. Spring and summer area export increases more (~ 14 % per decade) than in autumn and winter, and these export anomalies have a large influence on the following September mean ice extent.
format Text
author Halvorsen, M. H.
Smedsrud, L. H.
Zhang, R.
Kloster, K.
spellingShingle Halvorsen, M. H.
Smedsrud, L. H.
Zhang, R.
Kloster, K.
Fram Strait spring ice export and September Arctic sea ice
author_facet Halvorsen, M. H.
Smedsrud, L. H.
Zhang, R.
Kloster, K.
author_sort Halvorsen, M. H.
title Fram Strait spring ice export and September Arctic sea ice
title_short Fram Strait spring ice export and September Arctic sea ice
title_full Fram Strait spring ice export and September Arctic sea ice
title_fullStr Fram Strait spring ice export and September Arctic sea ice
title_full_unstemmed Fram Strait spring ice export and September Arctic sea ice
title_sort fram strait spring ice export and september arctic sea ice
publishDate 2018
url https://doi.org/10.5194/tcd-9-4205-2015
https://tc.copernicus.org/preprints/tc-2015-122/
geographic Arctic
Greenland
geographic_facet Arctic
Greenland
genre Arctic Basin
Arctic
Fram Strait
Greenland
Sea ice
genre_facet Arctic Basin
Arctic
Fram Strait
Greenland
Sea ice
op_source eISSN: 1994-0424
op_relation doi:10.5194/tcd-9-4205-2015
https://tc.copernicus.org/preprints/tc-2015-122/
op_doi https://doi.org/10.5194/tcd-9-4205-2015
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