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 tm1<tmand tm>tm+1 (t is the monthly mean temperature while m 1, m and m+1 denote subsequent winte...
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Norwegian Polar Institute
2011
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ftdoajarticles:oai:doaj.org/article:f8ecfa7faca043ffb95e3df048576142 2023-05-15T15:11:03+02:00 The occurrence of coreless winters in central Spitsbergen and their synoptic conditions Ewa Bednorz Krzysztof Fortuniak 2011-12-01T00:00:00Z https://doi.org/10.3402/polar.v30i0.12218 https://doaj.org/article/f8ecfa7faca043ffb95e3df048576142 EN eng Norwegian Polar Institute http://www.polarresearch.net/index.php/polar/article/view/12218/pdf_1 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 doi:10.3402/polar.v30i0.12218 0800-0395 1751-8369 https://doaj.org/article/f8ecfa7faca043ffb95e3df048576142 Polar Research, Vol 30, Iss 0, Pp 1-10 (2011) Spitsbergen coreless winters air temperature circulation polar climate Environmental sciences GE1-350 Oceanography GC1-1581 article 2011 ftdoajarticles https://doi.org/10.3402/polar.v30i0.12218 2022-12-30T22:49:34Z 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 tm1<tmand 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 (SLP) and z 500-hPa means, and 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. Article in Journal/Newspaper Arctic Barents Sea Fram Strait Polar Research Svalbard Spitsbergen Directory of Open Access Journals: DOAJ Articles Arctic Svalbard Barents Sea Polar Research 30 1 12218 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
Spitsbergen coreless winters air temperature circulation polar climate Environmental sciences GE1-350 Oceanography GC1-1581 |
spellingShingle |
Spitsbergen coreless winters air temperature circulation polar climate Environmental sciences GE1-350 Oceanography GC1-1581 Ewa Bednorz Krzysztof Fortuniak The occurrence of coreless winters in central Spitsbergen and their synoptic conditions |
topic_facet |
Spitsbergen coreless winters air temperature circulation polar climate Environmental sciences GE1-350 Oceanography GC1-1581 |
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 tm1<tmand 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 (SLP) and z 500-hPa means, and 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. |
format |
Article in Journal/Newspaper |
author |
Ewa Bednorz Krzysztof Fortuniak |
author_facet |
Ewa Bednorz Krzysztof Fortuniak |
author_sort |
Ewa Bednorz |
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://doi.org/10.3402/polar.v30i0.12218 https://doaj.org/article/f8ecfa7faca043ffb95e3df048576142 |
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, Iss 0, Pp 1-10 (2011) |
op_relation |
http://www.polarresearch.net/index.php/polar/article/view/12218/pdf_1 https://doaj.org/toc/0800-0395 https://doaj.org/toc/1751-8369 doi:10.3402/polar.v30i0.12218 0800-0395 1751-8369 https://doaj.org/article/f8ecfa7faca043ffb95e3df048576142 |
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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1766341960245706752 |