The CHAMP data base of Equatorial Spread-F magnetic signatures

Details The CHAMP data base of Equatorial Spread-F magnetic signatures The CHAMP data base of Equatorial Spread-F magnetic signatures

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsa33b1334s&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SA33B-1334

Physics

2415 Equatorial Ionosphere, 2437 Ionospheric Dynamics, 2439 Ionospheric Irregularities

Scientific paper

Novel possibilities to detect Equatorial Spread-F (ESF) events are given by the magnetic signatures of the depleted plasma tubes. The diamagnetic effect enhances the total magnetic field in regions of low plasma density. We use 7 years (2001-2007) of almost continuous high quality magnetic field observations on board the CHAMP satellite to reconstruct the global climatology of the ESF magnetic signatures at about 400 km altitude. Our results compare very well with existing ESF climatologies based on satellite observations of electron density, especially in longitudinal and seasonal (S/L) dependences. We find an excellent agreement with the S/L distribution of the equatorial prereversal vertical plasma drift velocity derived from ROCSAT-1 observations. These results prove that the vertical plasma drift acting on the F-layer height is the dominant contributor to the ESF occurrence. The increasing CHAMP data set spanning different solar cycle phases reveals the existence of more, larger and stronger ESF events for high solar flux level conditions. These characteristics are reflected in the extended local time and the higher L-values where ESFs are observed at high solar flux levels. CHAMP also provides observations of the transverse magnetic ESF signatures. These deflections imply the existence of field- aligned currents. Such observations will be used for characterizing the electrodynamic state of the ESF event.

Affiliated with

Also associated with

No associations

Rating

The CHAMP data base of Equatorial Spread-F magnetic signatures 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 The CHAMP data base of Equatorial Spread-F magnetic signatures, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The CHAMP data base of Equatorial Spread-F magnetic signatures will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1413857