Statistical study of relationship between medium-scale traveling ionospheric disturbance and sporadic E layer activities in summer night over Japan

Details Statistical study of relationship between medium-scale traveling ionospheric disturbance and sporadic E layer activities in summer night over Japan Statistical study of relationship between medium-scale traveling ionospheric disturbance and sporadic E layer activities in summer night over Japan

Dec 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008jastp..70.2196o&link_type=abstract

Journal of Atmospheric and Solar-Terrestrial Physics, Volume 70, Issue 17, p. 2196-2202.

Physics

3

Sporadic E Layer, Medium-Scale Traveling Ionospheric Disturbance, Ionosonde, Airglow, Instability

Scientific paper

We investigate the relationship between medium-scale traveling ionospheric disturbance (MSTID) and sporadic E (Es) layer activities in summer nights by analyzing total electron content (TEC) data obtained from a global positioning system (GPS) network in Japan and ionosonde data obtained at Kokubunji, Japan during May-August in 2001-2005. MSTID activity is defined as , where [delta]I is standard deviation of the TEC perturbations over Kokubunji within 1 h, and is the background TEC. By analyzing nighttime-averaged (19-02 LT) values of MSTID activity and Es layer parameters, we find that the MSTID activity is closely correlated with f0Es and f0Es-fbEs. This result suggests that MSTID and the spatial structures of Es layer could be generated by an electro-dynamical coupling process between the Es layer and F region through polarization electric fields. Furthermore, we suggest that the appearance of the Es layer in the summer hemisphere could play an important role in generating MSTIDs in both hemispheres.

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