The dynamics of the poleward edge of the trough deduced using data from a meridional chain of vertical-incidence sounding stations

Details The dynamics of the poleward edge of the trough deduced using data from a meridional chain of vertical-incidence sounding stations The dynamics of the poleward edge of the trough deduced using data from a meridional chain of vertical-incidence sounding stations

Oct 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jatp...55.1537z&link_type=abstract

Journal of Atmospheric and Terrestrial Physics (ISSN 0021-9169), vol. 55, no. 11-12, p. 1537-1542.

Computer Science

Sound

2

Convection, F Region, Ionospheric Electron Density, Magnetic Disturbances, Troughs, Electron Precipitation, Ionospheric Sounding, Mathematical Models

Scientific paper

Data from four ionospheric stations located along the 90 deg E meridian in the range 55-70 deg of corrected geomagnetic latitude, were used to construct latitude time electron density distributions in the F2-layer peak for 17 winter nights of 1982-1983. It is concluded that under stationary convection conditions the poleward edge of the trough during the nighttime displaces only 0.5-1 deg/h, that is, significantly less than obtained from existing analytical models of the ionospheric trough. When the stationarity is upset, the poleward edge of the trough is observed to displace abruptly equatorward. In the substorm expansion phase these displacements can amount to 4-5 deg in less than an hour. Such displacements of the poleward edge in the evening hours can characterize the dynamics of the inner edge of the plasma sheet.

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