The occurrence of coreless winters in central Spitsbergen and their synoptic conditions
Ten warm-core winters were distinguished in the period 1975/76-2007/08, drawing on data from the Svalbard Airport weather station in central Spitsbergen and using the conditions tm-1 < tm and tm > tm+1 (t is the monthly mean temperature while m-1, m and m+1 denote subsequent winter months) and...
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Norwegian Polar Institute
2011
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ftjpolarres:oai:journals.openacademia.net:article/3028 2023-05-15T15:13:37+02:00 The occurrence of coreless winters in central Spitsbergen and their synoptic conditions Bednorz, Ewa Fortuniak, Krzysztof 2011-12-13 application/pdf text/html application/epub+zip text/xml https://polarresearch.net/index.php/polar/article/view/3028 https://doi.org/10.3402/polar.v30i0.12218 eng eng Norwegian Polar Institute https://polarresearch.net/index.php/polar/article/view/3028/pdf_1 https://polarresearch.net/index.php/polar/article/view/3028/html https://polarresearch.net/index.php/polar/article/view/3028/6816 https://polarresearch.net/index.php/polar/article/view/3028/xml https://polarresearch.net/index.php/polar/article/view/3028 doi:10.3402/polar.v30i0.12218 Copyright (c) 2018 Polar Research Polar Research; Vol 30 (2011) 1751-8369 Spitsbergen coreless winters air temperature circulation polar climate info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2011 ftjpolarres https://doi.org/10.3402/polar.v30i0.12218 2021-11-11T19:13:37Z Ten warm-core winters were distinguished in the period 1975/76-2007/08, drawing on data from the Svalbard Airport weather station in central Spitsbergen and using the conditions tm-1 < tm and tm > tm+1 (t is the monthly mean temperature while m-1, m and m+1 denote subsequent winter months) and the parameter of a coreless rate, cr (the ratio of the second, a2, to the first, a1, harmonic of the annual temperature wave). Composite maps of sea-level pressure and z 500-hPa means, as well as anomaly maps, were constructed separately for the mid-winter warm events and for the cold months before and after warming. Using the clustering method, different pressure patterns were recognized among the days of mid-winter warm spells. The occurrence of coreless winters in central Spitsbergen seems to be largely controlled by the position, extent and intensity of large-scale atmospheric systems, mainly the Icelandic Low. When the low spreads to the east and its centre is over the Barents Sea the inflow of air masses from the northern quadrant is observed over central Spitsbergen. This inflow of cold air of Arctic origin to the island takes place during the months preceding and following warm mid-winter events. Different circulation conditions appear when the Icelandic Low gets deeper than usual and shifts northwards, which coincides with warm spells. Sometimes a secondary cyclonic centre is located over Fram Strait and its warm sector encompasses Svalbard.Keywords: Spitsbergen; coreless winters; air temperature; circulation; polar climate(Published: 13 December 2011)Citation: Polar Research 2011, 30, 12218, DOI:10.3402/polar.v30i0.12218 Article in Journal/Newspaper Arctic Barents Sea Fram Strait Polar Research Svalbard Spitsbergen Polar Research (E-Journal) Arctic Svalbard Barents Sea Polar Research 30 1 12218 |
institution |
Open Polar |
collection |
Polar Research (E-Journal) |
op_collection_id |
ftjpolarres |
language |
English |
topic |
Spitsbergen coreless winters air temperature circulation polar climate |
spellingShingle |
Spitsbergen coreless winters air temperature circulation polar climate Bednorz, Ewa Fortuniak, Krzysztof The occurrence of coreless winters in central Spitsbergen and their synoptic conditions |
topic_facet |
Spitsbergen coreless winters air temperature circulation polar climate |
description |
Ten warm-core winters were distinguished in the period 1975/76-2007/08, drawing on data from the Svalbard Airport weather station in central Spitsbergen and using the conditions tm-1 < tm and tm > tm+1 (t is the monthly mean temperature while m-1, m and m+1 denote subsequent winter months) and the parameter of a coreless rate, cr (the ratio of the second, a2, to the first, a1, harmonic of the annual temperature wave). Composite maps of sea-level pressure and z 500-hPa means, as well as anomaly maps, were constructed separately for the mid-winter warm events and for the cold months before and after warming. Using the clustering method, different pressure patterns were recognized among the days of mid-winter warm spells. The occurrence of coreless winters in central Spitsbergen seems to be largely controlled by the position, extent and intensity of large-scale atmospheric systems, mainly the Icelandic Low. When the low spreads to the east and its centre is over the Barents Sea the inflow of air masses from the northern quadrant is observed over central Spitsbergen. This inflow of cold air of Arctic origin to the island takes place during the months preceding and following warm mid-winter events. Different circulation conditions appear when the Icelandic Low gets deeper than usual and shifts northwards, which coincides with warm spells. Sometimes a secondary cyclonic centre is located over Fram Strait and its warm sector encompasses Svalbard.Keywords: Spitsbergen; coreless winters; air temperature; circulation; polar climate(Published: 13 December 2011)Citation: Polar Research 2011, 30, 12218, DOI:10.3402/polar.v30i0.12218 |
format |
Article in Journal/Newspaper |
author |
Bednorz, Ewa Fortuniak, Krzysztof |
author_facet |
Bednorz, Ewa Fortuniak, Krzysztof |
author_sort |
Bednorz, Ewa |
title |
The occurrence of coreless winters in central Spitsbergen and their synoptic conditions |
title_short |
The occurrence of coreless winters in central Spitsbergen and their synoptic conditions |
title_full |
The occurrence of coreless winters in central Spitsbergen and their synoptic conditions |
title_fullStr |
The occurrence of coreless winters in central Spitsbergen and their synoptic conditions |
title_full_unstemmed |
The occurrence of coreless winters in central Spitsbergen and their synoptic conditions |
title_sort |
occurrence of coreless winters in central spitsbergen and their synoptic conditions |
publisher |
Norwegian Polar Institute |
publishDate |
2011 |
url |
https://polarresearch.net/index.php/polar/article/view/3028 https://doi.org/10.3402/polar.v30i0.12218 |
geographic |
Arctic Svalbard Barents Sea |
geographic_facet |
Arctic Svalbard Barents Sea |
genre |
Arctic Barents Sea Fram Strait Polar Research Svalbard Spitsbergen |
genre_facet |
Arctic Barents Sea Fram Strait Polar Research Svalbard Spitsbergen |
op_source |
Polar Research; Vol 30 (2011) 1751-8369 |
op_relation |
https://polarresearch.net/index.php/polar/article/view/3028/pdf_1 https://polarresearch.net/index.php/polar/article/view/3028/html https://polarresearch.net/index.php/polar/article/view/3028/6816 https://polarresearch.net/index.php/polar/article/view/3028/xml https://polarresearch.net/index.php/polar/article/view/3028 doi:10.3402/polar.v30i0.12218 |
op_rights |
Copyright (c) 2018 Polar Research |
op_doi |
https://doi.org/10.3402/polar.v30i0.12218 |
container_title |
Polar Research |
container_volume |
30 |
container_issue |
1 |
container_start_page |
12218 |
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1766344152628330496 |