Global manifestations of a substorm onset observed by a multi-satellite and ground station network

Global manifestations of a substorm onset observed by a multi-satellite and ground station network
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多卫星和地面站网络观测到的亚暴爆发的全球表现

DOI:
10.5194/angeo-24-3491-2006
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发表时间:
2006-12
期刊:
Ann. Geophys.
影响因子:
--
通讯作者:
Z. Y. Pu
Z. Y. Pu
中科院分区:
其他
文献类型:
--
作者:
C. P. Escoubet;H. Réme;P. Ritter;H. U. Frey;Z. X. Liu;H. Lühr;Wang Hui;S. Y. Ma;Z. Y. Pu

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抽象。利用卫星和地面站的有利星座,对亚暴爆发的全球表现进行了研究。在两个半球同时共轭发生的开始,证实了从图像FUV-WIC极光分裂和突然加强从地面磁力计向西电喷流的观测。与此同时,CHAMP观测到极光电离层中的场向电流和霍尔电流,这与Harang不连续性的特征一致。紧接着,位于中央磁尾附近的双星星星TC-1和随后的星团四重奏都清楚地观察到了磁场的双极化。观测结果可以用亚暴流楔以约300 km/s的速度向黎明传播来解释。
Abstract. With a favorable constellation of spacecraft and ground stations, a study is made on the global manifestations of a substorm onset. The onset occurred simultaneously and conjugately in both hemispheres, confirmed by observations of the auroral breakup from IMAGE FUV-WIC and a sudden intensification of a westward electrojet from ground-based magnetometers. Concurrently with the onset, field-aligned and Hall currents in the auroral ionosphere are observed by CHAMP, which are consistent with the signature of a Harang discontinuity. Immediately after the onset a magnetic field dipolarization is clearly observed by Double Star TC-1, located near the central magnetotail and subsequently, by the Cluster quartet. The observations can be explained by a dawnward propagation of the substorm current wedge at a speed of about 300 km/s.
DOI: 10.5194/angeo-23-2915-2005
发表时间: 2005-11
影响因子: 1.9
作者:
R. Nakamura;Wolfgang Baumjohann;T. Zhang;C. Carr;A. Balogh;K. Fornacon;E. Georgescu;H. Rème
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