EMIC-Wave Driven Electron Precipitation Observed by CALET on the International Space Station

被引：9

作者：

Bruno, A. ^{[1
,2
]}

Blum, L. W. ^{[3
]}

de Nolfo, G. A. ^{[1
]}

Kataoka, R. ^{[4
,5
]}

Torii, S. ^{[6
]}

Greeley, A. D. ^{[1
,2
]}

Kanekal, S. G. ^{[1
]}

Ficklin, A. W. ^{[7
]}

Guzik, T. G. ^{[7
]}

Nakahira, S. ^{[8
]}

机构：

[1] NASA, Heliophys Sci Div, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA

[2] Catholic Univ Amer, Dept Phys, Washington, DC 20064 USA

[3] Univ Colorado, Boulder, CO 80309 USA

[4] Natl Inst Polar Res, Tachikawa, Tokyo, Japan

[5] SOKENDAI, Dept Polar Sci, Tachikawa, Tokyo, Japan

[6] Waseda Univ, Waseda Res Inst Sci & Engn, Shinjuku Ku, Tokyo, Japan

[7] Louisiana State Univ, Dept Phys & Astron, Baton Rouge, LA 70803 USA

[8] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Sagamihara, Kanagawa, Japan

来源：

GEOPHYSICAL RESEARCH LETTERS | 2022年 / 49卷 / 06期

关键词：

radiation belts; relativistic electron precipitation; EMIC waves; RADIATION-BELT ELECTRONS; LOSSES; ACCELERATION; EVENT; INNER; FLUX;

D O I：

10.1029/2021GL097529

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

We present an analysis of the relativistic electron precipitation (REP) event measured by the CALorimetric Electron Telescope (CALET) experiment on board the International Space Station during a relatively weak geomagnetic storm on 31 December 2016. CALET observations were compared with the measurements of the Van Allen Probes in the near-equatorial plane to investigate the global radiation belt dynamics and the REP drivers. The magnetically conjugate observations from these two missions demonstrate that the significant MeV precipitation directly detected by CALET in low-Earth orbit during a period of radiation belt depletion following the passage of a high-speed stream, was associated with dusk-side electromagnetic ion cyclotron (EMIC) waves. In addition, the combined wave, REP and trapped electron data suggest that the reported radiation belt depletion can be likely ascribed to the concomitant loss effects of EMIC wave scattering driving the atmospheric precipitation, as well as outward radial diffusion associated with magnetopause shadowing.

引用

页数：9

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