Latitudinal shift and tilt of the ring current during magnetic storms

CHEN BO; XU WenYao; CHEN GengXiong; DU AiMin; WU YingYan; LIU XiaoCan

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Latitudinal shift and tilt of the ring current during magnetic storms

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The equatorial ring current (ERC) theory suggested that the distribution of global disturbed horizontal geomagnetic field only depends on the cosine of station’s latitude. However,we always observe a lar-ger ΔH at higher latitude stations than lower ones,implying that the ERC could tilt or/and shift with respect to the equatorial plane during intense storms. In this paper,we analyze 11 intense magnetic storms from 2000 to 2004,and introduce two configurational factors to characterize the topology of storm time ring current. The results show that ERC has occasionally deviated off equatorial plane with both tilt angle δt≈13°―25° and latitude shift δs≈0°―21.8°. The ground disturbed field distribution should be improved as ΔHk = ΔHmaxcos(k-δ ),which agree well with the geomagnetic observations.

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《中国科学通报：英文版》 |2009年第1期|95-103|共9页
作者
CHEN BO; XU WenYao; CHEN GengXiong; DU AiMin; WU YingYan; LIU XiaoCan;
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作者单位

Institute of Geology and Geophysics;

Chinese Academy of Sciences;

Beijing 100029;

China;

Graduate University of Chinese Academy of Sciences;

Beijing 100049;

China;

National Satellite Meteorological Center;

China Meteorological Administration;

Beijing 100081;

China;

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原文格式 PDF
正文语种 chi
中图分类地磁学;
关键词
赤道; 地磁反转; 组态; 地理纬度; 磁暴;

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1. MAGNETIC DISTURBANCES AND EQUIVALENT IONOSPHERIC CURRENTS DURING THE GREAT MAGNETIC STORM OF MARCH 13-14,1989 [J] . Xu WenyaoInstitute of Geophysics Academia SinicaLin Yunfang Zeng XiaopingInstitute of Geophysics SSB . 天文研究与技术 . 1990,第4期

Latitudinal shift and tilt of the ring current during magnetic storms

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