Effect of EMIC waves on relativistic and ultrarelativistic electron populations: Ground‐based and Van Allen Probes observations
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- M. E. Usanova
- Department of Physics University of Alberta Edmonton Alberta Canada
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- A. Drozdov
- Department of Earth, Planetary, and Space Sciences University of California Los Angeles California USA
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- K. Orlova
- Department of Earth, Planetary, and Space Sciences University of California Los Angeles California USA
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- I. R. Mann
- Department of Physics University of Alberta Edmonton Alberta Canada
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- Y. Shprits
- Department of Earth, Planetary, and Space Sciences University of California Los Angeles California USA
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- M. T. Robertson
- Department of Physics University of Alberta Edmonton Alberta Canada
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- D. L. Turner
- Department of Earth, Planetary, and Space Sciences University of California Los Angeles California USA
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- D. K. Milling
- Department of Physics University of Alberta Edmonton Alberta Canada
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- A. Kale
- Department of Physics University of Alberta Edmonton Alberta Canada
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- D. N. Baker
- Laboratory for Atmospheric and Space Physics University of Colorado Boulder Boulder Colorado USA
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- S. A. Thaller
- School of Physics and Astronomy University of Minnesota Minneapolis Minnesota USA
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- G. D. Reeves
- Los Alamos National Laboratory Los Alamos New Mexico USA
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- H. E. Spence
- Institute for the Study of Earth, Oceans, and Space University of New Hampshire Durham New Hampshire USA
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- C. Kletzing
- Department of Physics and Astronomy University of Iowa Iowa City Iowa USA
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- J. Wygant
- School of Physics and Astronomy University of Minnesota Minneapolis Minnesota USA
書誌事項
- 公開日
- 2014-03-06
- 権利情報
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- http://onlinelibrary.wiley.com/termsAndConditions#vor
- DOI
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- 10.1002/2013gl059024
- 公開者
- American Geophysical Union (AGU)
この論文をさがす
説明
<jats:title>Abstract</jats:title><jats:p>We study the effect of electromagnetic ion cyclotron (EMIC) waves on the loss and pitch angle scattering of relativistic and ultrarelativistic electrons during the recovery phase of a moderate geomagnetic storm on 11 October 2012. The EMIC wave activity was observed in situ on the Van Allen Probes and conjugately on the ground across the Canadian Array for Real‐time Investigations of Magnetic Activity throughout an extended 18 h interval. However, neither enhanced precipitation of >0.7 MeV electrons nor reductions in Van Allen Probe 90° pitch angle ultrarelativistic electron flux were observed. Computed radiation belt electron pitch angle diffusion rates demonstrate that rapid pitch angle diffusion is confined to low pitch angles and cannot reach 90°. For the first time, from both observational and modeling perspectives, we show evidence of EMIC waves triggering ultrarelativistic (~2–8 MeV) electron loss but which is confined to pitch angles below around 45° and not affecting the core distribution.</jats:p>
収録刊行物
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- Geophysical Research Letters
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Geophysical Research Letters 41 (5), 1375-1381, 2014-03-06
American Geophysical Union (AGU)
