Galactic cosmic ray variation influence on baric system dynamics at middle latitudes

Variations of atmospheric pressure in the North Atlantic region during Forbush decreases of galactic cosmic rays were investigated. A noticeable pressure growth with the maximum on the 3rd and 4th days after the Forbush decrease onsets was revealed over Scandinavia and the northern region of the Eur...

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Bibliographic Details
Published in:Journal of atmospheric and solar-terrestrial physics 2011-02, Vol.73 (2), p.366-370
Main Authors: Artamonova, Irina, Veretenenko, Svetlana
Format: Article
Language:English
Subjects:
Cyclonic activity
Forbush decreases
Pressure variations
Solar effects
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Summary:Variations of atmospheric pressure in the North Atlantic region during Forbush decreases of galactic cosmic rays were investigated. A noticeable pressure growth with the maximum on the 3rd and 4th days after the Forbush decrease onsets was revealed over Scandinavia and the northern region of the European part of Russia. It was shown that the observed pressure growth was caused by the formation of blocking anticyclones in the region of the climatic Arctic front, as well as by the sharp slowing of the movement of North Atlantic cyclones. It was suggested that the particles that precipitate in the regions of the climatic Arctic and Polar fronts, with the minimum energies E∼20–80 MeV and ∼2–3 GeV, respectively, may influence the processes of cyclone and anticyclone formation and development at extratropical latitudes.
ISSN:1364-6826
1879-1824
DOI:10.1016/j.jastp.2010.05.004