Global Empirical Picture of Magnetospheric Substorms Inferred From Multimission Magnetometer Data
Global Empirical Picture of Magnetospheric Substorms Inferred From Multimission Magnetometer Data
复制标题
从多任务磁力计数据推断的磁层亚暴的全球经验图
DOI:
10.1029/2018ja025843
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发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Ukhorskiy, A. Y.
中科院分区:
文献类型:
--
作者:
Stephens, G. K.;Sitnov, M. I.;Korth, H.;Tsyganenko, N. A.;Ohtani, S.;Gkioulidou, M.;Ukhorskiy, A. Y.
Magnetospheric substorms represent key explosive processes in the interaction of the Earth's magnetosphere with the solar wind, and their understanding and modeling are critical for space weather forecasting. During substorms, the magnetic field on the nightside is first stretched in the antisunward direction and then it rapidly contracts earthward bringing hot plasmas from the distant space regions into the inner magnetosphere, where they contribute to geomagnetic storms and Joule dissipation in the polar ionosphere, causing impressive splashes of aurora. Here we show for the first time that mining millions of spaceborne magnetometer data records from multiple missions allows one to reconstruct the global 3‐D picture of these stretching and dipolarization processes. Stretching results in the formation of a thin (less than the Earth's radius) and strong current sheet, which is diverted into the ionosphere during dipolarization. In the meantime, the dipolarization signal propagates further into the inner magnetosphere resulting in the accumulation of a longer lived current there, giving rise to a protogeomagnetic storm. The global 3‐D structure of the corresponding substorm currents including the substorm current wedge is reconstructed from data.
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影响因子:
2.4
作者:
N. Tsyganenko
通讯作者:
N. Tsyganenko
影响因子:
5.2
作者:
M. Sitnov;V. Merkin;P. Pritchett;M. Swisdak
通讯作者:
M. Swisdak
DOI:
10.1002/2014ja020651
发表时间:
2015
期刊:
Journal of Geophysical Research: Space Physics
影响因子:
--
作者:
V. Merkin;M. Sitnov;J. Lyon
通讯作者:
J. Lyon
DOI:
10.1029/95ja03192
发表时间:
1996-06
期刊:
Journal of Geophysical Research: Space Physics
影响因子:
--
作者:
V. A. Sergeev;T. Pulkkinen;R. Pellinen
通讯作者:
V. A. Sergeev;T. Pulkkinen;R. Pellinen
影响因子:
10.3
作者:
M. Sitnov;G. Stephens;M. Gkioulidou;V. Merkin;A. Ukhorskiy;H. Korth;P. Brandt;N. Tsyganenko
通讯作者:
N. Tsyganenko