Response time of the high-latitude dayside ionosphere to sudden changes in the north-south component of the IMF

Details Response time of the high-latitude dayside ionosphere to sudden changes in the north-south component of the IMF Response time of the high-latitude dayside ionosphere to sudden changes in the north-south component of the IMF

Dec 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988p%26ss...36.1415t&link_type=abstract

Planetary and Space Science (ISSN 0032-0633), vol. 36, Dec. 1988, p. 1415-1428.

Computer Science

78

Atmospheric Circulation, Change Detection, Interplanetary Magnetic Fields, Ionospheric Disturbances, Polar Regions, Daytime, Eiscat Radar System (Europe), Flow Velocity, Satellite Observation, Time Lag

Scientific paper

The time scale of the response of the high-latitude dayside ionospheric flow to changes in the north-south component of the IMF is studied by examining the time delays between corresponding sudden changes obtained from simultaneous IMF and ionospheric flow data. It is found that the corresponding flow changes occur simultaneously over the whole field of view of the EISCAT Polar experiment, extending more than 2 deg in invariant latitude. The ionospheric response delay following northward turnings is the same as that following southward turnings, although the form of the response is different in the two cases. The results are in good agreement with those derived by Etemadi et al. (1988) from a general cross-correlation analysis of the IMF B(z) and beam-swinging vector flow data.

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