HG03: Drivers, detection, and ionospheric impacts of precipitation from the radiation belts (1)

Wednesday, August 20  13:40-15:40,  Room #11

Session Chairs: Craig Rodger, Mark Clilverd

Particle precipitation into the atmosphere is believed to be one of the dominant mechanisms for the loss of energetic electron from the Van Allen radiation belts, as well causing losses of ring current ions. Waveparticle interactions with ULF through to VLF waves are thought to be important drivers of these loss-events. This session is targeted at both ground-based and satellite experimental observations, as well as theoretical investigations, into the precipitation of energetic (>20 keV) and relativistic electrons or ring current ions. Papers considering wave-particle interactions driving losses, measurement of loss fluxes, or the effects of this precipitation on the ionosphere are welcome. We particularly welcome early results from the Van Allen Probes, the BARREL (Balloon Array for RBSP Relativistic Electron Losses) campaign, or studies from existing ground and space based experiments. Note that studies directed towards radiation belt electron acceleration or transport are likely better suited to the complementary sessions H01-H03.

13:40  HG03.1   RADIATION BELT LOSSES OBSERVED FROM MULTIPLE STRATOSPHERIC BALLOONS OVER ANTARCTICA

M. P. McCarthy1, R. M. Millan2, J. G. Sample3, D. M. Smith4

1Earth & Space Sciences, University of Washington, Seattle, WA, United States
2Physics and Astronomy, Dartmouth College, Hanover, NH, United States
3Space Sciences Laboratory, University of California, Berkeley, CA, United States
4Physics, University of California, Santa Cruz, CA, United States


14:00  HG03.2   INVESTIGATING ELECTRON PRECIPITATION EVENT CHARACTERISTICS AND DRIVERS: COMBINING BARREL-INSPIRED MEASUREMENTS FROM ANTARCTICA AND CANADA.

M. A. Clilverd, R. L. Hardman, R. Duthie, C. J. Rodger, R. Millan

Climate, British Antarctic Survey, Cambridge, UK


14:20  HG03.3   LONG TERM DETERMINATION OF VARIATIONS IN ENERGETIC ELECTRON PRECIPITATION INTO THE ATMOSPHERE USING AARDDVARK

C. J. Rodger1, J. J. Neal1, M. A. Clilverd2, T. Raita3

1Physics, University of Otago, Dunedin, New Zealand
2British Antarctic Survey, Cambridge, United Kingdom
3University of Oulu, Sodankylš, Finland


14:40  HG03.4   RELATIVISTIC ELECTRON PRECIPITATION DUE TO NONLINEAR PITCH-ANGLE SCATTERING BY EMIC TRIGGERED EMISSIONS

Y. Omura

Research Institute for Sustainable Humanosphere, Kyoto University, Uji, Kyoto, Japan


15:00  HG03.5   INVESTIGATING THE UPPER AND LOWER ENERGY CUTOFFS OF EMIC-WAVE DRIVEN PRECIPITATION EVENTS

A. T. Hendry1, C. J. Rodger1, B. R. Carson1, M. A. Clilverd2

1Department of Physics, University of Otago, Dunedin, New Zealand
2British Antarctic Survey, Cambridge, United Kingdom


15:20  HG03.6   RESONANT SCATTERING OF ENERGETIC ELECTRONS BY UNUSUAL LOW-FREQUENCY HISS

B. Ni

Space Physics, Wuhan University, Wuhan, Hubei, China