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Annales Geophysicae An interactive open-access journal of the European Geosciences Union
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Discussion papers
https://doi.org/10.5194/angeo-2019-21
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/angeo-2019-21
© Author(s) 2019. This work is distributed under
the Creative Commons Attribution 4.0 License.

ANGEO Communicates 08 Mar 2019

ANGEO Communicates | 08 Mar 2019

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This discussion paper is a preprint. A revision of this manuscript was accepted for the journal Annales Geophysicae (ANGEO) and is expected to appear here in due course.

Notes on the correlation between SSWs and solar activity

Ekaterina Vorobeva Ekaterina Vorobeva
  • Department of Atmospheric Physics, Saint-Petersburg State University, Universitetskaya Emb. 7/9, 199034, Saint-Petersburg, Russia

Abstract. A correlation between solar activity and normalized occurrence rate of sudden stratospheric warmings (SSWs) has been found. As a proxy for solar activity, F10.7 cm radio flux has been used. In order to find the correlation, we derived a normalized occurrence rate of MSSWs based on both ERA40/ERA-Interim dataset and NCEP data. Based on this distribution, we calculated the correlation coefficient, which amounts to 0.6314, with a significance of 90.68 % for ERA40/ERA-Interim, and 0.5455 for NCEP-NCAR-I, with a significance of 83.80 %. Additionally, we calculate correlation coefficients for Lyman-alpha flux and sunspot numbers with the analogous method for the same period.

Ekaterina Vorobeva
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Interactive discussion
Status: closed
Status: closed
AC: Author comment | RC: Referee comment | SC: Short comment | EC: Editor comment
Printer-friendly Version - Printer-friendly version Supplement - Supplement
Ekaterina Vorobeva
Ekaterina Vorobeva
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Short summary
We investigated the statistical relationship between solar activity and occurrence rate of major sudden stratospheric warmings (MSSWs). For this purpose, F10.7 radio flux has been used as a proxy for solar activity. The calculations have been performed based on two datasets of central day (NCEP-NCAR-I and combined ERA) for the period from 1958 to 2013. The analysis revealed a positive correlation between MSSW events and solar activity.
We investigated the statistical relationship between solar activity and occurrence rate of...
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