Effects of TADs on the F region of the mid-latitude ionosphere during an intense geomagnetic storm

Details Effects of TADs on the F region of the mid-latitude ionosphere during an intense geomagnetic storm Effects of TADs on the F region of the mid-latitude ionosphere during an intense geomagnetic storm

Nov 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009adspr..44.1013y&link_type=abstract

Advances in Space Research, Volume 44, Issue 9, p. 1013-1018.

Physics

1

Scientific paper

Based on observations of two ionosondes at Wuhan and Kokubunji, this paper presents effects of TADs on the daytime mid-latitude ionosphere during the intense geomagnetic storm on March 31, 2001. During a positive ionospheric storm, the start of the enhancement of the foF2 (F2 peak plasma frequency) at Wuhan lags that at Kokubunji by 15 min, which corresponds to the time interval of traveling atmospheric disturbances (TADs’) propagation from Kokubunji to Wuhan. Associated with the uplifting of the hmF2 (height of F2 peak) caused by TADs, it is observed by the two ionosondes that the F1 cusp becomes better developed. Therefore, during a geomagnetic storm, TADs originating from the auroral oval may have a strong influence on the shape of the electron density profile in the F1 region ionosphere at middle latitudes. It is highly likely that TADs are responsible for the evolution of the F1 cusp.

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