SM21A-2458
Outer Belt Radial Transport Signatures in Drift Phase Structure – Case Studies
Tuesday, 15 December 2015
Poster Hall (Moscone South)
Thomas Paul O'Brien III1, Betty P Kwan1, Tamitha M Skov2, S. G. Claudepierre3, J. L. Roeder3, Janet C Green4 and J. F. Fennell5, (1)Aerospace Corporation, Los Angeles, CA, United States, (2)The Aerospace Corporation, Los Angeles, CA, United States, (3)The Aerospace Corp, Los Angeles, CA, United States, (4)Organization Not Listed, Washington, DC, United States, (5)Aerospace Corporation Los Angeles, Los Angeles, CA, United States
Abstract:
During geomagnetic storms, the Earth’s outer radiation belt experiences enhanced radial transport. Different modes of radial transport have different temporal signatures in the particle phase-space density on timescales shorter than a drift period. We use such drift phase structure in time series particle flux observations to identify transport signatures of impulsive and oscillatory drift resonant transport. We perform multiple case studies of geomagnetic storms using particle flux taken near geostationary orbit. We estimate the radial diffusion coefficients from the drift phase structures. We show how these radial diffusion coefficients derived from particle data compare to transport coefficients deduced from wave observations.
