Simulated magnetopause losses and Van Allen Probe flux dropouts

被引：103

作者：

Hudson, M. K. ^{[1
]}

Baker, D. N. ^{[2
]}

Goldstein, J. ^{[3
,4
]}

Kress, B. T. ^{[1
]}

Paral, J. ^{[1
]}

Toffoletto, F. R. ^{[5
]}

Wiltberger, M. ^{[6
]}

机构：

[1] Dartmouth Coll, Dept Phys & Astron, Hanover, NH 03755 USA

[2] Univ Colorado, Lab Atmospher & Space Phys, Boulder, CO 80309 USA

[3] SW Res Inst, San Antonio, TX USA

[4] Univ Texas San Antonio, San Antonio, TX USA

[5] Rice Univ, Phys & Astron Dept, Houston, TX USA

[6] NCAR, High Altitude Observ, Boulder, CO USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2014年 / 41卷 / 04期

基金：

美国国家科学基金会;

关键词：

Radiation Belts; RADIATION-BELT ELECTRONS; RELATIVISTIC ELECTRONS; GEOMAGNETIC STORMS; LOCAL ACCELERATION; EVOLUTION; PRECIPITATION; LOCATION; RING;

D O I：

10.1002/2014GL059222

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Three radiation belt flux dropout events seen by the Relativistic Electron Proton Telescope soon after launch of the Van Allen Probes in 2012 (Baker et al., 2013a) have been simulated using the Lyon-Fedder-Mobarry MHD code coupled to the Rice Convection Model, driven by measured upstream solar wind parameters. MHD results show inward motion of the magnetopause for each event, along with enhanced ULF wave power affecting radial transport. Test particle simulations of electron response on 8 October, prior to the strong flux enhancement on 9 October, provide evidence for loss due to magnetopause shadowing, both in energy and pitch angle dependence. Severe plasmapause erosion occurred during similar to 14h of strongly southward interplanetary magnetic field B-z beginning 8 October coincident with the inner boundary of outer zone depletion.

引用

页码：1113 / 1118

页数：6

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