Stratospheric warmings: The atmosphere-ionosphere coupling paradigm

Details Stratospheric warmings: The atmosphere-ionosphere coupling paradigm Stratospheric warmings: The atmosphere-ionosphere coupling paradigm

Aug 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011jastp..73.1697p&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 73, Issue 13, p. 1697-1702.

Physics

1

Scientific paper

The paper presents for the first time the global spatial (latitude and altitude) structure of the mean ionospheric response to sudden stratospheric warming (SSW) events in winters of 2007/2008 and 2008/2009. To elucidate the effect of the SSWs on the ionosphere the COSMIC foF2, hmF2, and electron density data at fixed altitudes are analyzed. Both the mean foF2 and hmF2 parameters and the mean electron density at fixed heights indicate regular negative responses to the SSW temperature pulses at high latitudes. Similar response is found for the diurnal variability of the COSMIC electron density. The response is confined mainly to low and middle latitudes. A possible mechanism causing the observed negative ionospheric response is suggested.

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