Energetic electron precipitation from the outer radiation belt during geomagnetic storms

Details Energetic electron precipitation from the outer radiation belt during geomagnetic storms Energetic electron precipitation from the outer radiation belt during geomagnetic storms

Oct 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3619104h&link_type=abstract

Geophysical Research Letters, Volume 36, Issue 19, CiteID L19104

Physics

11

Magnetospheric Physics: Radiation Belts, Magnetospheric Physics: Energetic Particles: Precipitating, Magnetospheric Physics: Energetic Particles: Trapped, Magnetospheric Physics: Polar Cap Phenomena, Magnetospheric Physics: Magnetic Storms And Substorms (7954)

Scientific paper

Relativistic electron precipitation changes the chemistry of the upper atmosphere and depletes ozone, but the spatial and temporal distributions are poorly known. Here we survey more than 9 years of data from low altitude satellites for different phases of geomagnetic storms. We find that for the outer radiation belt, electron precipitation >300 keV peaks during the main phase of storms whereas that >1 MeV peaks during the recovery phase. Precipitation >300 keV can occur at all geographic longitudes in both hemispheres whereas that >1 MeV occurs mainly poleward of the South Atlantic anomaly (SAA) region. The data suggest that wave-particle interactions are strong enough to precipitate >300 keV electrons into the bounce loss cone, but precipitate >1 MeV electrons into the drift loss cone. We find that whistler mode chorus waves alone cannot account for the higher MeV precipitation flux during the recovery phase. We suggest that whistler mode chorus waves accelerate electrons up to MeV energies during the recovery phase which are then precipitated by EMIC waves. The effects on atmospheric chemistry due to MeV electron precipitation are more likely to occur in the southern hemisphere poleward of the SAA region with a delay of 1-2 days or more from the peak of the storm.

Affiliated with

Also associated with

No associations

Rating

Energetic electron precipitation from the outer radiation belt during geomagnetic storms 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 Energetic electron precipitation from the outer radiation belt during geomagnetic storms, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Energetic electron precipitation from the outer radiation belt during geomagnetic storms will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1360439