Physics
Scientific paper
Aug 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002jastp..64.1505k&link_type=abstract
Journal of Atmospheric and Solar-Terrestrial Physics, Volume 64, Issue 12-14, p. 1505-1510.
Physics
10
Scientific paper
In order to understand the recent radar observations of rising structures in the plasma densities in the upper E-region during nighttime at equatorial and low latitude stations, an investigation is made to explore the possible relation between the E- and F-region structures. The investigation revealed that the fringe fields associated with the development of equatorial spread-F (ESF) structures initiated by large-scale waves in the zonal direction, can penetrate well below the E-region. These fringe fields pull the structures upward and tilt them left- or right-hand side to generate rising tilted structures in the E-region. The depth of the penetration of the fringe fields from F-region altitudes mainly depends on the wavelength of the initial perturbation. The fringe fields can move the E-region structures upward with varying speeds, even when the background drift during nighttime is downward, depending on the strength of ESF development.
Kherani Alam E.
Raghavarao R.
Sekar R.
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