The role of North Atlantic–European weather regimes in the surface impact of sudden stratospheric warming events
Sudden stratospheric warming (SSW) events can significantly impact tropospheric weather for a period of several weeks, in particular in the North Atlantic–European (NAE) region. While the stratospheric forcing often projects onto the North Atlantic Oscillation (NAO), the tropospheric response to SSW...
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ftdoajarticles:oai:doaj.org/article:94b08da56eb64f01b6388d0d572e0e7a 2023-05-15T16:28:39+02:00 The role of North Atlantic–European weather regimes in the surface impact of sudden stratospheric warming events D. I. V. Domeisen C. M. Grams L. Papritz 2020-08-01T00:00:00Z https://doi.org/10.5194/wcd-1-373-2020 https://doaj.org/article/94b08da56eb64f01b6388d0d572e0e7a EN eng Copernicus Publications https://wcd.copernicus.org/articles/1/373/2020/wcd-1-373-2020.pdf https://doaj.org/toc/2698-4016 doi:10.5194/wcd-1-373-2020 2698-4016 https://doaj.org/article/94b08da56eb64f01b6388d0d572e0e7a Weather and Climate Dynamics, Vol 1, Pp 373-388 (2020) Meteorology. Climatology QC851-999 article 2020 ftdoajarticles https://doi.org/10.5194/wcd-1-373-2020 2022-12-31T12:50:15Z Sudden stratospheric warming (SSW) events can significantly impact tropospheric weather for a period of several weeks, in particular in the North Atlantic–European (NAE) region. While the stratospheric forcing often projects onto the North Atlantic Oscillation (NAO), the tropospheric response to SSW events, if any, is highly variable, and what determines the existence, location, timing, and strength of the downward impact remains an open question. We here explore how the variable tropospheric response to SSW events in the NAE region can be characterized in terms of a refined set of seven weather regimes and if the tropospheric flow in the North Atlantic region around the onset of SSW events is an indicator of the subsequent downward impact. The weather regime analysis reveals the Greenland blocking (GL) and Atlantic trough (AT) regimes as the most frequent large-scale patterns in the weeks following an SSW. While the GL regime is dominated by high pressure over Greenland, AT is dominated by a southeastward-shifted storm track in the North Atlantic. The flow evolution associated with GL and the associated cold conditions over Europe in the weeks following an SSW occur most frequently if a blocking situation over western Europe and the North Sea (European blocking) prevailed around the SSW onset. In contrast, an AT regime associated with mild conditions over Europe is more likely following the SSW event if GL occurs already around SSW onset. For the remaining tropospheric flow regimes during SSW onset we cannot identify a dominant flow evolution. Although it remains unclear what causes these relationships, the results suggest that specific tropospheric states in the days around the onset of the SSW are an indicator of the subsequent tropospheric flow evolution in the aftermath of an SSW, which could provide crucial guidance for subseasonal prediction. Article in Journal/Newspaper Greenland North Atlantic North Atlantic oscillation Directory of Open Access Journals: DOAJ Articles Greenland Weather and Climate Dynamics 1 2 373 388 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Meteorology. Climatology QC851-999 |
spellingShingle |
Meteorology. Climatology QC851-999 D. I. V. Domeisen C. M. Grams L. Papritz The role of North Atlantic–European weather regimes in the surface impact of sudden stratospheric warming events |
topic_facet |
Meteorology. Climatology QC851-999 |
description |
Sudden stratospheric warming (SSW) events can significantly impact tropospheric weather for a period of several weeks, in particular in the North Atlantic–European (NAE) region. While the stratospheric forcing often projects onto the North Atlantic Oscillation (NAO), the tropospheric response to SSW events, if any, is highly variable, and what determines the existence, location, timing, and strength of the downward impact remains an open question. We here explore how the variable tropospheric response to SSW events in the NAE region can be characterized in terms of a refined set of seven weather regimes and if the tropospheric flow in the North Atlantic region around the onset of SSW events is an indicator of the subsequent downward impact. The weather regime analysis reveals the Greenland blocking (GL) and Atlantic trough (AT) regimes as the most frequent large-scale patterns in the weeks following an SSW. While the GL regime is dominated by high pressure over Greenland, AT is dominated by a southeastward-shifted storm track in the North Atlantic. The flow evolution associated with GL and the associated cold conditions over Europe in the weeks following an SSW occur most frequently if a blocking situation over western Europe and the North Sea (European blocking) prevailed around the SSW onset. In contrast, an AT regime associated with mild conditions over Europe is more likely following the SSW event if GL occurs already around SSW onset. For the remaining tropospheric flow regimes during SSW onset we cannot identify a dominant flow evolution. Although it remains unclear what causes these relationships, the results suggest that specific tropospheric states in the days around the onset of the SSW are an indicator of the subsequent tropospheric flow evolution in the aftermath of an SSW, which could provide crucial guidance for subseasonal prediction. |
format |
Article in Journal/Newspaper |
author |
D. I. V. Domeisen C. M. Grams L. Papritz |
author_facet |
D. I. V. Domeisen C. M. Grams L. Papritz |
author_sort |
D. I. V. Domeisen |
title |
The role of North Atlantic–European weather regimes in the surface impact of sudden stratospheric warming events |
title_short |
The role of North Atlantic–European weather regimes in the surface impact of sudden stratospheric warming events |
title_full |
The role of North Atlantic–European weather regimes in the surface impact of sudden stratospheric warming events |
title_fullStr |
The role of North Atlantic–European weather regimes in the surface impact of sudden stratospheric warming events |
title_full_unstemmed |
The role of North Atlantic–European weather regimes in the surface impact of sudden stratospheric warming events |
title_sort |
role of north atlantic–european weather regimes in the surface impact of sudden stratospheric warming events |
publisher |
Copernicus Publications |
publishDate |
2020 |
url |
https://doi.org/10.5194/wcd-1-373-2020 https://doaj.org/article/94b08da56eb64f01b6388d0d572e0e7a |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic North Atlantic oscillation |
genre_facet |
Greenland North Atlantic North Atlantic oscillation |
op_source |
Weather and Climate Dynamics, Vol 1, Pp 373-388 (2020) |
op_relation |
https://wcd.copernicus.org/articles/1/373/2020/wcd-1-373-2020.pdf https://doaj.org/toc/2698-4016 doi:10.5194/wcd-1-373-2020 2698-4016 https://doaj.org/article/94b08da56eb64f01b6388d0d572e0e7a |
op_doi |
https://doi.org/10.5194/wcd-1-373-2020 |
container_title |
Weather and Climate Dynamics |
container_volume |
1 |
container_issue |
2 |
container_start_page |
373 |
op_container_end_page |
388 |
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