Investigation of past and future Polar Low frequency in the North Atlantic
Polar lows are a particular kind of extreme weather event. Polar lows are subsynoptic-scale vigorous cyclones in subpolar maritime region. They are associated with strong winds and severe weather and when developing rapidly can constitute a major threat to human offshore activities. Here we present...
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Sharma, A.S.; Bunde, A.; Dimri, V.P.; Baker, D.N.
2012
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fthzgzmk:oai:publications.hereon.de:30488 2023-06-11T04:14:28+02:00 Investigation of past and future Polar Low frequency in the North Atlantic Zahn, M. Storch, H.v. 2012 https://publications.hereon.de/id/30488 https://publications.hzg.de/id/30488 unknown Sharma, A.S.; Bunde, A.; Dimri, V.P.; Baker, D.N. AGU http://dx.doi.org/10.1029/2011GM001091 urn:isbn:978-0-87590-486-3 https://publications.hereon.de/id/30488 https://publications.hzg.de/id/30488 info:eu-repo/semantics/closedAccess Zahn, M.; Storch, H.v.: Investigation of past and future Polar Low frequency in the North Atlantic. In: Sharma, A.S.; Bunde, A.; Dimri, V.P.; Baker, D.N. (Eds.): Extreme Events and Natural Hazards: The Complexity Perspective, Geophysical Monograph Series. Vol. 196 2012. 99 - 110. (DOI:10.1029/2011GM001091) (ISBN: 978-0-87590-486-3) info:eu-repo/classification/ddc/551 info:eu-repo/semantics/bookPart Buch Artikel 2012 fthzgzmk https://doi.org/10.1029/2011GM001091 2023-05-28T23:23:35Z Polar lows are a particular kind of extreme weather event. Polar lows are subsynoptic-scale vigorous cyclones in subpolar maritime region. They are associated with strong winds and severe weather and when developing rapidly can constitute a major threat to human offshore activities. Here we present methods and results of our previous research to investigate long-term frequency changes of polar low occurrences over the North Atlantic in the past and in a projected, anthropogenically warmed future atmosphere. For the past, we downscaled reanalysis data to reproduce, detect, and count polar lows, and for the future, we downscaled global model data from various Intergovernmental Panel on Climate Change scenarios. We found no systematic change of polar low frequency in the past 60 years but a significant decrease of down to half as many cases for the simulated future. We relate this decrease to an increase of vertical atmospheric stability, which is the result of more quickly rising air temperatures compared to the sea surface. The results have recently been published in a series of articles. Book Part North Atlantic Hereon Publications (Helmholtz-Zentrum) 99 110 |
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info:eu-repo/classification/ddc/551 |
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info:eu-repo/classification/ddc/551 Zahn, M. Storch, H.v. Investigation of past and future Polar Low frequency in the North Atlantic |
topic_facet |
info:eu-repo/classification/ddc/551 |
description |
Polar lows are a particular kind of extreme weather event. Polar lows are subsynoptic-scale vigorous cyclones in subpolar maritime region. They are associated with strong winds and severe weather and when developing rapidly can constitute a major threat to human offshore activities. Here we present methods and results of our previous research to investigate long-term frequency changes of polar low occurrences over the North Atlantic in the past and in a projected, anthropogenically warmed future atmosphere. For the past, we downscaled reanalysis data to reproduce, detect, and count polar lows, and for the future, we downscaled global model data from various Intergovernmental Panel on Climate Change scenarios. We found no systematic change of polar low frequency in the past 60 years but a significant decrease of down to half as many cases for the simulated future. We relate this decrease to an increase of vertical atmospheric stability, which is the result of more quickly rising air temperatures compared to the sea surface. The results have recently been published in a series of articles. |
format |
Book Part |
author |
Zahn, M. Storch, H.v. |
author_facet |
Zahn, M. Storch, H.v. |
author_sort |
Zahn, M. |
title |
Investigation of past and future Polar Low frequency in the North Atlantic |
title_short |
Investigation of past and future Polar Low frequency in the North Atlantic |
title_full |
Investigation of past and future Polar Low frequency in the North Atlantic |
title_fullStr |
Investigation of past and future Polar Low frequency in the North Atlantic |
title_full_unstemmed |
Investigation of past and future Polar Low frequency in the North Atlantic |
title_sort |
investigation of past and future polar low frequency in the north atlantic |
publisher |
Sharma, A.S.; Bunde, A.; Dimri, V.P.; Baker, D.N. |
publishDate |
2012 |
url |
https://publications.hereon.de/id/30488 https://publications.hzg.de/id/30488 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Zahn, M.; Storch, H.v.: Investigation of past and future Polar Low frequency in the North Atlantic. In: Sharma, A.S.; Bunde, A.; Dimri, V.P.; Baker, D.N. (Eds.): Extreme Events and Natural Hazards: The Complexity Perspective, Geophysical Monograph Series. Vol. 196 2012. 99 - 110. (DOI:10.1029/2011GM001091) (ISBN: 978-0-87590-486-3) |
op_relation |
http://dx.doi.org/10.1029/2011GM001091 urn:isbn:978-0-87590-486-3 https://publications.hereon.de/id/30488 https://publications.hzg.de/id/30488 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1029/2011GM001091 |
container_start_page |
99 |
op_container_end_page |
110 |
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1768392480007389184 |