Annales Geophysicae
Annales Geophysicae
ANGEO
Articles | Volume 33, issue 2
Articles | Volume 33, issue 2
https://doi.org/10.5194/angeo-33-199-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
https://doi.org/10.5194/angeo-33-199-2015
© Author(s) 2015. This work is distributed under
the Creative Commons Attribution 3.0 License.
Articles | Volume 33, issue 2
Regular paper
 | 
23 Feb 2015
Regular paper |  | 23 Feb 2015

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, and M. Rapp

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Short summary
A vertical coupling process in the northern high-latitude middle atmosphere has been identified during the equinox transitions, which we call the “hiccup” and which acts like a “mini sudden stratospheric warming (SSW)”. We study the average characteristics of the hiccup based on a composite analysis using a nudged model. A comparison of the average characteristics of hiccups and SSWs shows both similarities and differences between the two vertical coupling processes.
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