Physics – Space Physics
Scientific paper
Dec 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009agufmsm32a..07d&link_type=abstract
American Geophysical Union, Fall Meeting 2009, abstract #SM32A-07
Physics
Space Physics
[2427] Ionosphere / Ionosphere/Atmosphere Interactions
Scientific paper
CHAMP observations of the thermospheric density often show air density enhancements of almost a factor of two when the satellite passes the cusp region. Such density peaks require a persistent heating system to maintain them. Due to the limitation of the observations, the heating mechanism has not been confirmed and no conclusive explanation for the neutral density enhancement has been offered. To unveil the mystery of the neutral density enhancement in the cusp, different heating mechanisms including Poynting flux and soft particle precipitation will be analyzed systematically using DMSP and NOAA/POES measurements and their impacts on the neutral density will be simulated in GCMs. These results will strongly improve our understanding and description of the energy transfer process between the solar wind, the magnetosphere and the ionosphere, which is one key question in space physics.
Deng Youjin
Evans Silvan D.
Fuller-Rowell Tim J.
Knipp Delores J.
Ridley Aaron J.
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