An objective global climatology of polar lows based on reanalysis data
This is the pre-peer reviewed version of the following article: Stoll, P., Graversen, R., Noer, G. & Hodges, K. (2018). An objective global climatology of polar lows based on reanalysis data. Quarterly Journal of the Royal Meteorological Society. https://doi.org/10.1002/qj.3309, which has been p...
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ftunivtroemsoe:oai:munin.uit.no:10037/13386 2023-05-15T15:05:53+02:00 An objective global climatology of polar lows based on reanalysis data Stoll, Patrick Graversen, Rune Noer, Gunnar Hodges, Kevin 2018-04-16 https://hdl.handle.net/10037/13386 eng eng Wiley Quarterly Journal of the Royal Meteorological Society Stoll, P., Graversen, R., Noer, G. & Hodges, K. (2018). An objective global climatology of polar lows based on reanalysis data. Quarterly Journal of the Royal Meteorological Society. https://doi.org/10.1002/qj.3309 FRIDAID 1599461 0035-9009 1477-870X https://hdl.handle.net/10037/13386 openAccess VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 mesoscale cyclone Arctic hurricane marine cold‐air outbreak detection/ identification criteria tracking algorithm long‐term trend Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe 2021-06-25T17:56:02Z This is the pre-peer reviewed version of the following article: Stoll, P., Graversen, R., Noer, G. & Hodges, K. (2018). An objective global climatology of polar lows based on reanalysis data. Quarterly Journal of the Royal Meteorological Society. https://doi.org/10.1002/qj.3309, which has been published in final form at https://doi.org/10.1002/qj.3309 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Here we present an objective global climatology of polar lows. In order to obtain objective detection criteria, the efficacy of several parameters for separating polar lows from other cyclones has been compared. The comparison and the climatology are based on the ERA‐Interim reanalysis from 1979 ‐ 2016 and the high‐resolution Arctic System Reanalysis from 2000 ‐ 2012. The most effective parameters in separating polar lows from other extra‐tropical cyclones were found to be the difference between the sea‐level pressure at the centre of the low and its surroundings, the difference in the potential temperature between the sea surface and the 500 hPa level, and the tropopause wind speed poleward of the system. Other parameters often used to identify polar lows, such as the 10 m wind speed and the temperature difference between the sea surface and the 700 hPa level, were found to be less effective. The climatologies reveal that polar lows occur in all marine basins at high latitudes, but with high occurrence density in the vicinity of the sea‐ice edge and coastal zones. The regions showing the highest degree of polar‐low activity are the Denmark Strait and the Nordic Seas, especially for the most intense polar lows. In the North Atlantic and Pacific, the main polar‐low season ranges from November to March. In the Southern Hemisphere, polar lows are mainly detected between 50 ‐ 65 S from April to October, indicating that this hemisphere compared to its northern counterpart has a two months longer, but less intense, polar‐low season. No significant hemispheric long‐term trends are observed, although some regions, such as the Denmark Strait and the Nordic Seas, experience significant downward and upward trends in polar lows, respectively, over the last decades. For intense polar lows, a significant decaying trend has been observed for the Northern Hemisphere. Article in Journal/Newspaper Arctic Denmark Strait Nordic Seas North Atlantic Sea ice University of Tromsø: Munin Open Research Archive Arctic Pacific Quarterly Journal of the Royal Meteorological Society 144 716 2099 2117 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 mesoscale cyclone Arctic hurricane marine cold‐air outbreak detection/ identification criteria tracking algorithm long‐term trend |
spellingShingle |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 mesoscale cyclone Arctic hurricane marine cold‐air outbreak detection/ identification criteria tracking algorithm long‐term trend Stoll, Patrick Graversen, Rune Noer, Gunnar Hodges, Kevin An objective global climatology of polar lows based on reanalysis data |
topic_facet |
VDP::Matematikk og Naturvitenskap: 400::Geofag: 450::Meteorologi: 453 VDP::Mathematics and natural science: 400::Geosciences: 450::Meteorology: 453 mesoscale cyclone Arctic hurricane marine cold‐air outbreak detection/ identification criteria tracking algorithm long‐term trend |
description |
This is the pre-peer reviewed version of the following article: Stoll, P., Graversen, R., Noer, G. & Hodges, K. (2018). An objective global climatology of polar lows based on reanalysis data. Quarterly Journal of the Royal Meteorological Society. https://doi.org/10.1002/qj.3309, which has been published in final form at https://doi.org/10.1002/qj.3309 . This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. Here we present an objective global climatology of polar lows. In order to obtain objective detection criteria, the efficacy of several parameters for separating polar lows from other cyclones has been compared. The comparison and the climatology are based on the ERA‐Interim reanalysis from 1979 ‐ 2016 and the high‐resolution Arctic System Reanalysis from 2000 ‐ 2012. The most effective parameters in separating polar lows from other extra‐tropical cyclones were found to be the difference between the sea‐level pressure at the centre of the low and its surroundings, the difference in the potential temperature between the sea surface and the 500 hPa level, and the tropopause wind speed poleward of the system. Other parameters often used to identify polar lows, such as the 10 m wind speed and the temperature difference between the sea surface and the 700 hPa level, were found to be less effective. The climatologies reveal that polar lows occur in all marine basins at high latitudes, but with high occurrence density in the vicinity of the sea‐ice edge and coastal zones. The regions showing the highest degree of polar‐low activity are the Denmark Strait and the Nordic Seas, especially for the most intense polar lows. In the North Atlantic and Pacific, the main polar‐low season ranges from November to March. In the Southern Hemisphere, polar lows are mainly detected between 50 ‐ 65 S from April to October, indicating that this hemisphere compared to its northern counterpart has a two months longer, but less intense, polar‐low season. No significant hemispheric long‐term trends are observed, although some regions, such as the Denmark Strait and the Nordic Seas, experience significant downward and upward trends in polar lows, respectively, over the last decades. For intense polar lows, a significant decaying trend has been observed for the Northern Hemisphere. |
format |
Article in Journal/Newspaper |
author |
Stoll, Patrick Graversen, Rune Noer, Gunnar Hodges, Kevin |
author_facet |
Stoll, Patrick Graversen, Rune Noer, Gunnar Hodges, Kevin |
author_sort |
Stoll, Patrick |
title |
An objective global climatology of polar lows based on reanalysis data |
title_short |
An objective global climatology of polar lows based on reanalysis data |
title_full |
An objective global climatology of polar lows based on reanalysis data |
title_fullStr |
An objective global climatology of polar lows based on reanalysis data |
title_full_unstemmed |
An objective global climatology of polar lows based on reanalysis data |
title_sort |
objective global climatology of polar lows based on reanalysis data |
publisher |
Wiley |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/13386 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Denmark Strait Nordic Seas North Atlantic Sea ice |
genre_facet |
Arctic Denmark Strait Nordic Seas North Atlantic Sea ice |
op_relation |
Quarterly Journal of the Royal Meteorological Society Stoll, P., Graversen, R., Noer, G. & Hodges, K. (2018). An objective global climatology of polar lows based on reanalysis data. Quarterly Journal of the Royal Meteorological Society. https://doi.org/10.1002/qj.3309 FRIDAID 1599461 0035-9009 1477-870X https://hdl.handle.net/10037/13386 |
op_rights |
openAccess |
container_title |
Quarterly Journal of the Royal Meteorological Society |
container_volume |
144 |
container_issue |
716 |
container_start_page |
2099 |
op_container_end_page |
2117 |
_version_ |
1766337562741309440 |