Electrodynamics of the dayside cleft region based on ground observations at Svalbard

Details Electrodynamics of the dayside cleft region based on ground observations at Svalbard Electrodynamics of the dayside cleft region based on ground observations at Svalbard

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993oslo.rept.....e&link_type=abstract

Final Report, Dec. 1991 - Jan. 1992 Oslo Univ. (Norway). Inst. of Physics.

Physics

Auroras, Dmsp Satellites, Earth Ionosphere, Eiscat Radar System (Europe), Electrodynamics, Kelvin-Helmholtz Instability, Magnetic Field Reconnection, Polar Caps, Electric Fields, Planetary Boundary Layer, Pressure Pulses, Scintillation, Space Plasmas

Scientific paper

Based on extensive, diagnostic ground observations in the Svalbard region (mainly at Ny Alesund at 76 deg lambda) together with simultaneous, coordinated measurements from Greenland and Heiss Island spanning - 4 hours in magnetic local time - together with the EISCAT radars as well as DMSP satellite-recordings, essential information on the dynamics of the dayside cleft and polar cap region (auroral, ionospheric, and electric field) have been obtained. This is an important prerequisite to the understanding of the physics of the dayside boundary layers. Several papers have been presented and many lectures given related to this program. Possible generation mechanisms of dayside cusp/cleft auroras including magnetic merging, external pressure pulses, Kelvin-Helmholtz-instabilities, and dynamo processes by intruding plasma elements are discussed. To determine the characteristic auroral signatures of these boundary layer processes is a major objective of these studies.

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