Variations in the near-ground electric field at high latitudes and the potential drop across the polar cap during morning polar substorms

Details Variations in the near-ground electric field at high latitudes and the potential drop across the polar cap during morning polar substorms Variations in the near-ground electric field at high latitudes and the potential drop across the polar cap during morning polar substorms

Jun 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011ge%26ae..51..394k&link_type=abstract

Geomagnetism and Aeronomy, Volume 51, Issue 3, pp.394-401

Computer Science

Scientific paper

This paper studies time variations in the near-ground atmospheric electric field ( Ez) at the geomagnetic latitude of 74° (Hornsund observatory) during polar substorms. Ez variations are compared with those in the potential drop across the polar cap ( Up), according to SuperDARN radar observations. It is found that in the morning sector, time variations in Ez are strongly driven by time variations in the electrojet and almost do not depend on time variations in Up, which is presumably due to the penetration of the electric field of the electrojet into tropospheric altitudes.

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