The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings
Sudden stratospheric warmings (SSWs) are the most prominent vertical coupling process in the middle atmosphere, which occur during winter and are caused by the interaction of planetary waves (PWs) with the zonal mean flow. Vertical coupling has also been identified during the equinox transitions, an...
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ftdoajarticles:oai:doaj.org/article:0b34d1475a254889bcbe501036c8d995 2023-05-15T13:25:16+02:00 The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings V. Matthias T. G. Shepherd P. Hoffmann M. Rapp 2015-02-01T00:00:00Z https://doi.org/10.5194/angeo-33-199-2015 https://doaj.org/article/0b34d1475a254889bcbe501036c8d995 EN eng Copernicus Publications https://www.ann-geophys.net/33/199/2015/angeo-33-199-2015.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-33-199-2015 0992-7689 1432-0576 https://doaj.org/article/0b34d1475a254889bcbe501036c8d995 Annales Geophysicae, Vol 33, Pp 199-206 (2015) Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 article 2015 ftdoajarticles https://doi.org/10.5194/angeo-33-199-2015 2022-12-31T12:19:59Z Sudden stratospheric warmings (SSWs) are the most prominent vertical coupling process in the middle atmosphere, which occur during winter and are caused by the interaction of planetary waves (PWs) with the zonal mean flow. Vertical coupling has also been identified during the equinox transitions, and is similarly associated with PWs. We argue that there is a characteristic aspect of the autumn transition in northern high latitudes, which we call the "hiccup", and which acts like a "mini SSW", i.e. like a small minor warming. We study the average characteristics of the hiccup based on a superimposed epoch analysis using a nudged version of the Canadian Middle Atmosphere Model, representing 30 years of historical data. Hiccups can be identified in about half the years studied. The mesospheric zonal wind results are compared to radar observations over Andenes (69° N, 16° E) for the years 2000–2013. A comparison of the average characteristics of hiccups and SSWs shows both similarities and differences between the two vertical coupling processes. Article in Journal/Newspaper Andenes Directory of Open Access Journals: DOAJ Articles Annales Geophysicae 33 2 199 206 |
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Open Polar |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
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English |
topic |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
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Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 V. Matthias T. G. Shepherd P. Hoffmann M. Rapp The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings |
topic_facet |
Science Q Physics QC1-999 Geophysics. Cosmic physics QC801-809 |
description |
Sudden stratospheric warmings (SSWs) are the most prominent vertical coupling process in the middle atmosphere, which occur during winter and are caused by the interaction of planetary waves (PWs) with the zonal mean flow. Vertical coupling has also been identified during the equinox transitions, and is similarly associated with PWs. We argue that there is a characteristic aspect of the autumn transition in northern high latitudes, which we call the "hiccup", and which acts like a "mini SSW", i.e. like a small minor warming. We study the average characteristics of the hiccup based on a superimposed epoch analysis using a nudged version of the Canadian Middle Atmosphere Model, representing 30 years of historical data. Hiccups can be identified in about half the years studied. The mesospheric zonal wind results are compared to radar observations over Andenes (69° N, 16° E) for the years 2000–2013. A comparison of the average characteristics of hiccups and SSWs shows both similarities and differences between the two vertical coupling processes. |
format |
Article in Journal/Newspaper |
author |
V. Matthias T. G. Shepherd P. Hoffmann M. Rapp |
author_facet |
V. Matthias T. G. Shepherd P. Hoffmann M. Rapp |
author_sort |
V. Matthias |
title |
The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings |
title_short |
The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings |
title_full |
The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings |
title_fullStr |
The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings |
title_full_unstemmed |
The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings |
title_sort |
hiccup: a dynamical coupling process during the autumn transition in the northern hemisphere – similarities and differences to sudden stratospheric warmings |
publisher |
Copernicus Publications |
publishDate |
2015 |
url |
https://doi.org/10.5194/angeo-33-199-2015 https://doaj.org/article/0b34d1475a254889bcbe501036c8d995 |
genre |
Andenes |
genre_facet |
Andenes |
op_source |
Annales Geophysicae, Vol 33, Pp 199-206 (2015) |
op_relation |
https://www.ann-geophys.net/33/199/2015/angeo-33-199-2015.pdf https://doaj.org/toc/0992-7689 https://doaj.org/toc/1432-0576 doi:10.5194/angeo-33-199-2015 0992-7689 1432-0576 https://doaj.org/article/0b34d1475a254889bcbe501036c8d995 |
op_doi |
https://doi.org/10.5194/angeo-33-199-2015 |
container_title |
Annales Geophysicae |
container_volume |
33 |
container_issue |
2 |
container_start_page |
199 |
op_container_end_page |
206 |
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1766384411145666560 |