The chain response of the magnetospheric and ground magnetic field to interplanetary shocks

DOI Web Site Web Site 被引用文献1件
  • T. R. Sun
    State Key Laboratory of Space Weather, Center for Space Science and Applied Research Chinese Academy of Sciences Beijing China
  • C. Wang
    State Key Laboratory of Space Weather, Center for Space Science and Applied Research Chinese Academy of Sciences Beijing China
  • J. J. Zhang
    State Key Laboratory of Space Weather, Center for Space Science and Applied Research Chinese Academy of Sciences Beijing China
  • V. A. Pilipenko
    Space Research Institute Moscow Russia
  • Y. Wang
    State Key Laboratory of Space Weather, Center for Space Science and Applied Research Chinese Academy of Sciences Beijing China
  • J. Y. Wang
    State Key Laboratory of Space Weather, Center for Space Science and Applied Research Chinese Academy of Sciences Beijing China

書誌事項

公開日
2015-01
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1002/2014ja020754
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>In response to interplanetary (IP) shocks, magnetic field may decrease/increase (negative/positive response) in nightside magnetosphere, while at high latitudes on the ground it has two‐phase bipolar variations: preliminary impulse and main impulse (MI). Using global MHD simulations, we investigate the linkage between the MI phase variation on the ground and the magnetospheric negative response to an IP shock. It is revealed that although the two phenomena occur at largely separated locations, they are physically related and form a response chain. The velocity disturbances near the flanks of the magnetopause cause the magnetic field to decrease, resulting in a dynamo which thus powers the transient field‐aligned currents (FACs). These FACs further generate a pair of ionospheric current vortex, leading to MI variations on the ground. Therefore, we report here the intrinsic physically related chain response of the magnetospheric and ground magnetic field to IP shocks, and thus link the magnetospheric sudden impulse (SI) and ground SI together.</jats:p>

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