Quantification of the Precipitation of Outer Radiation Belt Relativistic Electrons

Details Quantification of the Precipitation of Outer Radiation Belt Relativistic Electrons Quantification of the Precipitation of Outer Radiation Belt Relativistic Electrons

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm11a0327c&link_type=abstract

American Geophysical Union, Fall Meeting 2007, abstract #SM11A-0327

Physics

2716 Energetic Particles: Precipitating, 2720 Energetic Particles: Trapped, 2730 Magnetosphere: Inner, 2774 Radiation Belts, 2788 Magnetic Storms And Substorms (7954)

Scientific paper

Quantifying critical physical processes controlling relativistic electron dynamics in the Earth's outer radiation belt is the prerequisite for the development of space weather models. It is well known that a balance of competing source and loss processes determines the radiation belt electron dynamics. Although recent progress has been made on source processes, a complete model prediction of relativistic electrons still requires quantitative determination of loss processes, especially the effects of precipitation into the atmosphere due to wave-particle interactions. We will perform a statistical study of the decade-long multi-satellite electron observations from SAMPEX, LANL GEO and GPS. First we will develop an empirical model that describes the precipitation as functions of electron energy, longitude, latitude/L shell, local time, seasons, storm phases and sunspot phases. Then by comparing the decay rate of trapped electrons observed at the equatorial plane to the precipitation rates observed at low altitude, we can quantitatively determine the role of precipitation on the loss of relativistic electrons, especially for the portion of radiation belt with L>4.

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