Observational Evidence of Distinguishable Weather Patterns for Three Types of Sudden Stratospheric Warming During Northern Winter
Sudden stratospheric warming (SSW) events often lead to a cold surface air temperature anomaly over the extratropical regions. In this study, we propose, through observational evidence, that the types of SSW determine the severity of the cold anomaly. Based on the three-type classification of SSW, i...
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ftdoajarticles:oai:doaj.org/article:0619f0b5ac9c430f91bc1f0319e23449 2023-05-15T15:09:38+02:00 Observational Evidence of Distinguishable Weather Patterns for Three Types of Sudden Stratospheric Warming During Northern Winter Hyesun Choi Joo-Hong Kim Baek-Min Kim Seong-Joong Kim 2021-02-01T00:00:00Z https://doi.org/10.3389/feart.2021.625868 https://doaj.org/article/0619f0b5ac9c430f91bc1f0319e23449 EN eng Frontiers Media S.A. https://www.frontiersin.org/articles/10.3389/feart.2021.625868/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.625868 https://doaj.org/article/0619f0b5ac9c430f91bc1f0319e23449 Frontiers in Earth Science, Vol 9 (2021) sudden stratospheric warming type-transition North America surface temperature cold polar air Science Q article 2021 ftdoajarticles https://doi.org/10.3389/feart.2021.625868 2022-12-31T05:43:45Z Sudden stratospheric warming (SSW) events often lead to a cold surface air temperature anomaly over the extratropical regions. In this study, we propose, through observational evidence, that the types of SSW determine the severity of the cold anomaly. Based on the three-type classification of SSW, it is found that the surface air temperature drops notably over central to eastern North America following an SSW-type transition, especially from displacement to split. Note, however, that the differences in mean surface air temperature anomalies between SSW types are not statistically significant, even though after SSW-type transition from displacement to split, surface air temperature anomalies are colder than the other two types. The development of an anomalous tropospheric ridge in the North Pacific Arctic sector, associated with the difference in the vertical and zonal propagation of planetary waves, characterizes the post-warming period of the displacement–split type. After the occurrence of the displacement–split type transition of SSW events, upward propagation of planetary waves of zonal wavenumber 1 is suppressed, whereas planetary waves of zonal wavenumber 2 increase in the troposphere. Accompanying the ridge in the North Pacific, a trough developed downstream over North America that carries cold polar air therein. The results in this study are relevant for the subseasonal time scale, within 20 days after an SSW occurrence. Article in Journal/Newspaper Arctic Pacific Arctic Directory of Open Access Journals: DOAJ Articles Arctic Pacific Frontiers in Earth Science 9 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
sudden stratospheric warming type-transition North America surface temperature cold polar air Science Q |
spellingShingle |
sudden stratospheric warming type-transition North America surface temperature cold polar air Science Q Hyesun Choi Joo-Hong Kim Baek-Min Kim Seong-Joong Kim Observational Evidence of Distinguishable Weather Patterns for Three Types of Sudden Stratospheric Warming During Northern Winter |
topic_facet |
sudden stratospheric warming type-transition North America surface temperature cold polar air Science Q |
description |
Sudden stratospheric warming (SSW) events often lead to a cold surface air temperature anomaly over the extratropical regions. In this study, we propose, through observational evidence, that the types of SSW determine the severity of the cold anomaly. Based on the three-type classification of SSW, it is found that the surface air temperature drops notably over central to eastern North America following an SSW-type transition, especially from displacement to split. Note, however, that the differences in mean surface air temperature anomalies between SSW types are not statistically significant, even though after SSW-type transition from displacement to split, surface air temperature anomalies are colder than the other two types. The development of an anomalous tropospheric ridge in the North Pacific Arctic sector, associated with the difference in the vertical and zonal propagation of planetary waves, characterizes the post-warming period of the displacement–split type. After the occurrence of the displacement–split type transition of SSW events, upward propagation of planetary waves of zonal wavenumber 1 is suppressed, whereas planetary waves of zonal wavenumber 2 increase in the troposphere. Accompanying the ridge in the North Pacific, a trough developed downstream over North America that carries cold polar air therein. The results in this study are relevant for the subseasonal time scale, within 20 days after an SSW occurrence. |
format |
Article in Journal/Newspaper |
author |
Hyesun Choi Joo-Hong Kim Baek-Min Kim Seong-Joong Kim |
author_facet |
Hyesun Choi Joo-Hong Kim Baek-Min Kim Seong-Joong Kim |
author_sort |
Hyesun Choi |
title |
Observational Evidence of Distinguishable Weather Patterns for Three Types of Sudden Stratospheric Warming During Northern Winter |
title_short |
Observational Evidence of Distinguishable Weather Patterns for Three Types of Sudden Stratospheric Warming During Northern Winter |
title_full |
Observational Evidence of Distinguishable Weather Patterns for Three Types of Sudden Stratospheric Warming During Northern Winter |
title_fullStr |
Observational Evidence of Distinguishable Weather Patterns for Three Types of Sudden Stratospheric Warming During Northern Winter |
title_full_unstemmed |
Observational Evidence of Distinguishable Weather Patterns for Three Types of Sudden Stratospheric Warming During Northern Winter |
title_sort |
observational evidence of distinguishable weather patterns for three types of sudden stratospheric warming during northern winter |
publisher |
Frontiers Media S.A. |
publishDate |
2021 |
url |
https://doi.org/10.3389/feart.2021.625868 https://doaj.org/article/0619f0b5ac9c430f91bc1f0319e23449 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Pacific Arctic |
genre_facet |
Arctic Pacific Arctic |
op_source |
Frontiers in Earth Science, Vol 9 (2021) |
op_relation |
https://www.frontiersin.org/articles/10.3389/feart.2021.625868/full https://doaj.org/toc/2296-6463 2296-6463 doi:10.3389/feart.2021.625868 https://doaj.org/article/0619f0b5ac9c430f91bc1f0319e23449 |
op_doi |
https://doi.org/10.3389/feart.2021.625868 |
container_title |
Frontiers in Earth Science |
container_volume |
9 |
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1766340790946103296 |