Studying changes of energetic particle properties in the Earth's radiation belts using the SAMPEX, POLAR, and Cluster missions

Details Studying changes of energetic particle properties in the Earth's radiation belts using the SAMPEX, POLAR, and Cluster missions Studying changes of energetic particle properties in the Earth's radiation belts using the SAMPEX, POLAR, and Cluster missions

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufmsm32a..08b&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #SM32A-08

Physics

[2109] Interplanetary Physics / Discontinuities, [2139] Interplanetary Physics / Interplanetary Shocks, [2784] Magnetospheric Physics / Solar Wind/Magnetosphere Interactions

Scientific paper

The near-Earth region responds powerfully to changes of solar wind drivers. The Earth's radiation belts and inner magnetosphere show pronounced differences in their characteristics as the Sun's magnetic and solar wind plasma properties change. Solar coronal holes produce regular, recurrent solar wind streams in geospace, often enhancing highly relativistic electrons and causing recurrent magnetic storms. These phenomena are characteristics of the approach to solar minimum. On the other hand, major geomagnetic disturbances associated with aperiodic coronal mass ejections occur most frequently around solar maximum. Such disturbances also often produce radiation belt enhancements. We describe the observational and modeling results that describe differences throughout the inner part of geospace during the course of the 11-year solar cycle. We place particular emphasis on long-term, homogeneous data sets from the SAMPEX, POLAR, and Cluster missions, which in many ways have revolutionized our views of the dynamic radiation belt environment and the plasma sheet seed particle populations that feed the inner magnetosphere.

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