Electrodynamic context of magnetopause dynamics observed by magnetospheric multiscale

被引：11

作者：

Anderson, Brian J. ^{[1
]}

Russell, Christopher T. ^{[2
]}

Strangeway, Robert J. ^{[2
]}

Plaschke, Ferdinand ^{[3
]}

Magnes, Werner ^{[3
]}

Fischer, David ^{[3
]}

Korth, Haje ^{[1
]}

Merkin, Viacheslav G. ^{[1
]}

Barnes, Robin J. ^{[1
]}

Waters, Colin L. ^{[4
]}

Cohen, Ian J. ^{[1
]}

Westlake, Joseph H. ^{[1
]}

Mauk, Barry H. ^{[1
]}

Leinweber, Hannes K. ^{[2
]}

Gershman, Daniel J. ^{[5
]}

Giles, Barbara L. ^{[5
]}

Le, Guan ^{[5
]}

Torbert, Roy B. ^{[6
]}

Burch, James L. ^{[7
]}

机构：

[1] Johns Hopkins Univ, Appl Phys Lab, Laurel, MD 20723 USA

[2] Univ Calif Los Angeles, Dept Earth Planetary & Space Sci, Los Angeles, CA USA

[3] Austrian Acad Sci, Space Res Inst, Graz, Austria

[4] Univ Newcastle, Sch Math & Phys Sci, Callaghan, NSW, Australia

[5] NASA, Goddard Space Flight Ctr, Greenbelt, MD USA

[6] Univ New Hampshire, Inst Study Earth Oceans & Space, Durham, NH 03824 USA

[7] Southwest Res Inst, San Antonio, TX USA

来源：

GEOPHYSICAL RESEARCH LETTERS | 2016年 / 43卷 / 12期

关键词：

SCALE BIRKELAND CURRENTS; FIELD-ALIGNED CURRENTS; MAGNETOMETER DATA; PARAMETERS; MOTION; SPACE;

D O I：

10.1002/2016GL069577

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Magnetopause observations by Magnetospheric Multiscale (MMS) and Birkeland currents observed by the Active Magnetosphere and Planetary Electrodynamics Response Experiment are used to relate magnetopause encounters to ionospheric electrodynamics. MMS magnetopause crossings on 15 August and 19 September 2015 occurred earthward of expectations due to solar wind ram pressure alone and coincided with equatorward expansion of the Birkeland currents. Magnetopause erosion, consistent with expansion of the polar cap, contributed to the magnetopause crossings. The ionospheric projections of MMS during the events and at times of the magnetopause crossings indicate that MMS observations are related to the main path of flux transport in one case but not in a second. The analysis provides a way to routinely relate in situ observations to the context of in situ convection and flux transport.

引用

页码：5988 / 5996

页数：9

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