Investigation of EMIC wave scattering as the cause for the BARREL 17 January 2013 relativistic electron precipitation event: A quantitative comparison of simulation with observations

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  • Zan Li
    Department of Physics and Astronomy Dartmouth College Hanover New Hampshire USA
  • Robyn M. Millan
    Department of Physics and Astronomy Dartmouth College Hanover New Hampshire USA
  • Mary K. Hudson
    Department of Physics and Astronomy Dartmouth College Hanover New Hampshire USA
  • Leslie A. Woodger
    Department of Physics and Astronomy Dartmouth College Hanover New Hampshire USA
  • David M. Smith
    Physics Department and Santa Cruz Institute for Particle Physics University of California Santa Cruz California USA
  • Yue Chen
    Los Alamos National Laboratory Los Alamos New Mexico USA
  • Reiner Friedel
    Los Alamos National Laboratory Los Alamos New Mexico USA
  • Juan V. Rodriguez
    Cooperative Institute for Research in Environmental Sciences University of Colorado Boulder Boulder Colorado USA
  • Mark J. Engebretson
    Department of Physics Augsburg College Minneapolis Minnesota USA
  • Jerry Goldstein
    Southwest Research Institute San Antonio Texas USA
  • Joseph F. Fennell
    Space Science Applications Laboratory Aerospace Corporation Los Angeles California USA
  • Harlan E. Spence
    Institute for the Study of Earth, Oceans, and Space University of New Hampshire Durham New Hampshire USA

書誌事項

公開日
2014-12-23
権利情報
  • http://creativecommons.org/licenses/by-nc-nd/4.0/
DOI
  • 10.1002/2014gl062273
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>Electromagnetic ion cyclotron (EMIC) waves were observed at multiple observatory locations for several hours on 17 January 2013. During the wave activity period, a duskside relativistic electron precipitation (REP) event was observed by one of the Balloon Array for Radiation belt Relativistic Electron Losses (BARREL) balloons and was magnetically mapped close to Geostationary Operational Environmental Satellite (GOES) 13. We simulate the relativistic electron pitch angle diffusion caused by gyroresonant interactions with EMIC waves using wave and particle data measured by multiple instruments on board GOES 13 and the Van Allen Probes. We show that the count rate, the energy distribution, and the time variation of the simulated precipitation all agree very well with the balloon observations, suggesting that EMIC wave scattering was likely the cause for the precipitation event. The event reported here is the first balloon REP event with closely conjugate EMIC wave observations, and our study employs the most detailed quantitative analysis on the link of EMIC waves with observed REP to date.</jats:p>

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