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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Main Authors: Matthias, V., Shepherd, T.G., Hoffmann, P., Rapp, M.
Format: Article in Journal/Newspaper
Language:English
Published: Katlenburg, Lindau : Copernicus 2015
Subjects:
Online Access:https://oa.tib.eu/renate/handle/123456789/9173
https://doi.org/10.34657/8211
id fttibhannoverren:oai:oa.tib.eu:123456789/9173
record_format openpolar
spelling fttibhannoverren:oai:oa.tib.eu:123456789/9173 2024-09-15T17:39:23+00:00 The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings Matthias, V. Shepherd, T.G. Hoffmann, P. Rapp, M. 2015 application/pdf https://oa.tib.eu/renate/handle/123456789/9173 https://doi.org/10.34657/8211 eng eng Katlenburg, Lindau : Copernicus ESSN:1432-0576 DOI:https://doi.org/10.5194/angeo-33-199-2015 https://oa.tib.eu/renate/handle/123456789/9173 https://doi.org/10.34657/8211 CC BY 3.0 Unported https://creativecommons.org/licenses/by/3.0/ frei zugänglich ddc:550 atmospheric modeling autumn coupling Northern Hemisphere stratosphere warming zonal wind status-type:publishedVersion doc-type:Article doc-type:Text 2015 fttibhannoverren https://doi.org/10.34657/821110.5194/angeo-33-199-2015 2024-06-26T23:32:42Z 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 Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
institution Open Polar
collection Renate - Repositorium für Naturwissenschaften und Technik (TIB Hannover)
op_collection_id fttibhannoverren
language English
topic ddc:550
atmospheric modeling
autumn
coupling
Northern Hemisphere
stratosphere
warming
zonal wind
spellingShingle ddc:550
atmospheric modeling
autumn
coupling
Northern Hemisphere
stratosphere
warming
zonal wind
Matthias, V.
Shepherd, T.G.
Hoffmann, P.
Rapp, M.
The Hiccup: a dynamical coupling process during the autumn transition in the Northern Hemisphere – similarities and differences to sudden stratospheric warmings
topic_facet ddc:550
atmospheric modeling
autumn
coupling
Northern Hemisphere
stratosphere
warming
zonal wind
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 Matthias, V.
Shepherd, T.G.
Hoffmann, P.
Rapp, M.
author_facet Matthias, V.
Shepherd, T.G.
Hoffmann, P.
Rapp, M.
author_sort Matthias, V.
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 Katlenburg, Lindau : Copernicus
publishDate 2015
url https://oa.tib.eu/renate/handle/123456789/9173
https://doi.org/10.34657/8211
genre Andenes
genre_facet Andenes
op_relation ESSN:1432-0576
DOI:https://doi.org/10.5194/angeo-33-199-2015
https://oa.tib.eu/renate/handle/123456789/9173
https://doi.org/10.34657/8211
op_rights CC BY 3.0 Unported
https://creativecommons.org/licenses/by/3.0/
frei zugänglich
op_doi https://doi.org/10.34657/821110.5194/angeo-33-199-2015
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