Large-scale atmospheric circulation patterns during polar low events over the Nordic seas
The large-scale atmospheric circulation during polar low events over the Nordic seas (the North Atlantic between Greenland and Novaya Zemlya) is investigated on the basis of a recently compiled data set that was derived purely from satellite observations. A classification system is applied that divi...
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ftpubman:oai:pure.mpg.de:item_993964 2023-08-27T04:08:41+02:00 Large-scale atmospheric circulation patterns during polar low events over the Nordic seas Blechschmidt, A. Bakan, S. Grassl, H. 2009-03 application/pdf http://hdl.handle.net/11858/00-001M-0000-0011-F81D-A http://hdl.handle.net/11858/00-001M-0000-0011-F81C-C eng eng info:eu-repo/semantics/altIdentifier/doi/10.1029/2008JD010865 http://hdl.handle.net/11858/00-001M-0000-0011-F81D-A http://hdl.handle.net/11858/00-001M-0000-0011-F81C-C info:eu-repo/semantics/openAccess Journal of Geophysical Research - Atmospheres info:eu-repo/semantics/article 2009 ftpubman https://doi.org/10.1029/2008JD010865 2023-08-02T00:59:48Z The large-scale atmospheric circulation during polar low events over the Nordic seas (the North Atlantic between Greenland and Novaya Zemlya) is investigated on the basis of a recently compiled data set that was derived purely from satellite observations. A classification system is applied that divides the polar lows into four types (western polar lows, eastern polar lows, Greenland lee polar lows, and storm track polar lows). Type-specific large-scale atmospheric circulation patterns are identified from National Centers for Environmental Prediction reanalysis data. These are distinct in sea level pressure, upper level geopotential height, and the difference between the skin temperature of the ocean and upper level temperature. Eastern polar lows are found to be associated with a strong blocking situation caused by anomalously high pressure over Iceland and a synoptic-scale low-pressure anomaly over the Barents Sea. A weaker blocking situation with an anomalous ridge over Greenland reaching into the Irminger Sea and a low-pressure anomaly over the Norwegian Sea favors the development of western polar lows. Typical values for polar low genesis are a geopotential height of 5030 geopotential meters at 500 hPa and a difference of 48 K between the skin temperature of the ocean and the temperature at 500 hPa. The locations of upper level low-pressure anomalies relative to the locations of the related anomalies at the sea level show that western and eastern polar lows form, on average, in a much less baroclinic large-scale environment than Greenland lee and storm track polar lows. [References: 34] Article in Journal/Newspaper Barents Sea Greenland Iceland Nordic Seas North Atlantic Norwegian Sea Novaya Zemlya Max Planck Society: MPG.PuRe Barents Sea Greenland Irminger Sea ENVELOPE(-34.041,-34.041,63.054,63.054) Norwegian Sea Journal of Geophysical Research 114 D6 |
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Open Polar |
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Max Planck Society: MPG.PuRe |
op_collection_id |
ftpubman |
language |
English |
description |
The large-scale atmospheric circulation during polar low events over the Nordic seas (the North Atlantic between Greenland and Novaya Zemlya) is investigated on the basis of a recently compiled data set that was derived purely from satellite observations. A classification system is applied that divides the polar lows into four types (western polar lows, eastern polar lows, Greenland lee polar lows, and storm track polar lows). Type-specific large-scale atmospheric circulation patterns are identified from National Centers for Environmental Prediction reanalysis data. These are distinct in sea level pressure, upper level geopotential height, and the difference between the skin temperature of the ocean and upper level temperature. Eastern polar lows are found to be associated with a strong blocking situation caused by anomalously high pressure over Iceland and a synoptic-scale low-pressure anomaly over the Barents Sea. A weaker blocking situation with an anomalous ridge over Greenland reaching into the Irminger Sea and a low-pressure anomaly over the Norwegian Sea favors the development of western polar lows. Typical values for polar low genesis are a geopotential height of 5030 geopotential meters at 500 hPa and a difference of 48 K between the skin temperature of the ocean and the temperature at 500 hPa. The locations of upper level low-pressure anomalies relative to the locations of the related anomalies at the sea level show that western and eastern polar lows form, on average, in a much less baroclinic large-scale environment than Greenland lee and storm track polar lows. [References: 34] |
format |
Article in Journal/Newspaper |
author |
Blechschmidt, A. Bakan, S. Grassl, H. |
spellingShingle |
Blechschmidt, A. Bakan, S. Grassl, H. Large-scale atmospheric circulation patterns during polar low events over the Nordic seas |
author_facet |
Blechschmidt, A. Bakan, S. Grassl, H. |
author_sort |
Blechschmidt, A. |
title |
Large-scale atmospheric circulation patterns during polar low events over the Nordic seas |
title_short |
Large-scale atmospheric circulation patterns during polar low events over the Nordic seas |
title_full |
Large-scale atmospheric circulation patterns during polar low events over the Nordic seas |
title_fullStr |
Large-scale atmospheric circulation patterns during polar low events over the Nordic seas |
title_full_unstemmed |
Large-scale atmospheric circulation patterns during polar low events over the Nordic seas |
title_sort |
large-scale atmospheric circulation patterns during polar low events over the nordic seas |
publishDate |
2009 |
url |
http://hdl.handle.net/11858/00-001M-0000-0011-F81D-A http://hdl.handle.net/11858/00-001M-0000-0011-F81C-C |
long_lat |
ENVELOPE(-34.041,-34.041,63.054,63.054) |
geographic |
Barents Sea Greenland Irminger Sea Norwegian Sea |
geographic_facet |
Barents Sea Greenland Irminger Sea Norwegian Sea |
genre |
Barents Sea Greenland Iceland Nordic Seas North Atlantic Norwegian Sea Novaya Zemlya |
genre_facet |
Barents Sea Greenland Iceland Nordic Seas North Atlantic Norwegian Sea Novaya Zemlya |
op_source |
Journal of Geophysical Research - Atmospheres |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1029/2008JD010865 http://hdl.handle.net/11858/00-001M-0000-0011-F81D-A http://hdl.handle.net/11858/00-001M-0000-0011-F81C-C |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2008JD010865 |
container_title |
Journal of Geophysical Research |
container_volume |
114 |
container_issue |
D6 |
_version_ |
1775349544458911744 |