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Global simulation of EMIC wave excitation during the 21 April 2001 storm from coupled RCM-RAM-HOTRAY modeling

Chen, Lunjin; Thorne, Richard M.; Jordanova, Vania K.; Wang, Chih-Ping; Gkioulidou, Matina; Lyons, Larry; Horne, Richard B.. 2010 Global simulation of EMIC wave excitation during the 21 April 2001 storm from coupled RCM-RAM-HOTRAY modeling. Journal of Geophysical Research, 115 (A7), A07209. 13, pp. 10.1029/2009JA015075

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Abstract/Summary

The global distribution and spectral properties of electromagnetic ion cyclotron (EMIC) waves in the He+ band are simulated for the 21 April 2001 storm using a combination of three different codes: the Rice Convection Model, the Ring current-Atmospheric interactions Model, and the HOTRAY ray tracing code (incorporated with growth rate solver). During the storm main phase, injected ions exhibit a non-Maxwellian distribution with pronounced phase space density minima at energies around a few keV. Ring current H+-injected from the plasma sheet provides the source of free energy for EMIC excitation during the storm. Significant wave gain is confined to a limited spatial region inside the storm time plume and maximizes at the eastward edge of the plume in the dusk and premidnight sector. The excited waves are also able to resonate and scatter relativistic electrons, but the minimum electron resonant energy is generally above 3 MeV.

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1029/2009JA015075
Programmes: BAS Programmes > Polar Science for Planet Earth (2009 - ) > Climate
ISSN: 0148-0227
NORA Subject Terms: Meteorology and Climatology
Atmospheric Sciences
Date made live: 23 Sep 2010 12:54
URI: http://nora.nerc.ac.uk/id/eprint/10842

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