Accession Number : ADA263571


Title :   Electrodynamics of the Dayside Cleft Region Based on Ground Observations at Svalbard


Descriptive Note : Final rept. Dec 1991-Jan 1992


Corporate Author : OSLO UNIV (NORWAY) INST OF PHYSICS


Personal Author(s) : Egeland, A ; Holtet, J A ; Sandholt, P E


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a263571.pdf


Report Date : 20 Jan 1993


Pagination or Media Count : 15


Abstract : Based on extensive, diagnostic ground observations in the Svalbard region (mainly at Ny Alesund at 76 deg A) 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.


Descriptors :   *IONOSPHERE , *AURORAE , *ELECTRODYNAMICS , MEASUREMENT , OBSERVATION , BOUNDARY LAYER , ELECTRIC FIELDS , IONOSPHERIC SCINTILLATION , GREENLAND , POLAR CAP , GROUND BASED , RADAR , PULSES , ARTIFICIAL SATELLITES , PRESSURE


Subject Categories : Atmospheric Physics
      Electricity and Magnetism


Distribution Statement : APPROVED FOR PUBLIC RELEASE