Incoherent scatter radar spectrum distortions from intense auroral turbulence

Details Incoherent scatter radar spectrum distortions from intense auroral turbulence Incoherent scatter radar spectrum distortions from intense auroral turbulence

Jun 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993jgr....98.9459k&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 98, no. A6, p. 9459-9471.

Physics

10

Atmospheric Turbulence, Auroral Zones, Eiscat Radar System (Europe), F Region, Radar Measurement, Maxwell Equation, Traveling Ionospheric Disturbances

Scientific paper

EISCAT measurements of greater than 2000 K enhancements of the apparent temperature that occurred simultaneously over a latitude range of at least 100 km for brief periods (less than 1 min) in the auroral F-region are presented. Measurements were made during a two-week campaign lasting from 3 to 16 Feb. 1991. The apparent T sub i increases showed significant anisotropy, with measurements oriented less parallel to B sub 0 exhibiting the largest amount of apparent T sub i increase. It is argued that the measured T sub i increases are not real, and that both their magnitude and anisotropy with respect to B sub 0 can be satisfactorily explained by turbulent plasma flows with peak amplitudes of about 2 km/s, but which could not be directly resolved by EISCAT.

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