Energetics of the April 2000 magnetic superstorm observed by DMSP

Details Energetics of the April 2000 magnetic superstorm observed by DMSP Energetics of the April 2000 magnetic superstorm observed by DMSP

Jan 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006adspr..38..239b&link_type=abstract

Advances in Space Research, Volume 38, Issue 2, p. 239-252.

Mathematics

Logic

1

Scientific paper

During the late main phase of the April 6, 2000 storm with Dst approaching -300 nT, four Defense Meteorological Satellite Program (DMSP) satellites encountered repeated episodes of intense field-aligned currents whose magnetic perturbations exceeded 1300 nT, corresponding to |J∥| > 1 A/m. They had relatively fast rise times (˜5 min) and lasted for ˜20 min. The large magnetic perturbations occurred within the expanded auroral oval at magnetic latitudes below 60°. From Poynting-flux calculations we estimate that during each event several hundred tera-Joules of energy that dissipates in the mid-latitude ionosphere and thermosphere. Ground magnetometers at auroral and middle latitudes detected weak fluctuations that were incommensurate with magnetic perturbations observations at DMSP altitudes. Observed discrepancies between ground and satellite magnetometer measurements suggest that under storm conditions operational models systematically underestimate the level of electromagnetic energy available to the ionosphere thermosphere. We demonstrate a transmission-line model for M-I coupling that allows calculations of this electromagnetic energy input with no a priori knowledge of ionospheric conductances.

Affiliated with

Also associated with

No associations

Rating

Energetics of the April 2000 magnetic superstorm observed by DMSP does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Energetics of the April 2000 magnetic superstorm observed by DMSP, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energetics of the April 2000 magnetic superstorm observed by DMSP will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1279405