The Link Between Wedge‐Like and Nose‐Like Ion Spectral Structures in the Inner Magnetosphere

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  • Jie Ren
    Institute of Space Physics and Applied Technology Peking University Beijing China
  • Xu‐Zhi Zhou
    Institute of Space Physics and Applied Technology Peking University Beijing China
  • Qiu‐Gang Zong
    Institute of Space Physics and Applied Technology Peking University Beijing China
  • Chao Yue
    Institute of Space Physics and Applied Technology Peking University Beijing China
  • Sui‐Yan Fu
    Institute of Space Physics and Applied Technology Peking University Beijing China
  • Yoshizumi Miyoshi
    Institute for Space‐Earth Environmental Research Nagoya University Nagoya Japan
  • Xiao‐Xin Zhang
    Key Laboratory of Space Weather National Center for Space Weather China Meteorological Administration Beijing China
  • Kazushi Asamura
    Institute for Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Japan
  • Iku Shinohara
    Institute for Space and Astronautical Science Japan Aerospace Exploration Agency Sagamihara Japan

書誌事項

公開日
2021-07-06
資源種別
journal article
権利情報
  • http://onlinelibrary.wiley.com/termsAndConditions#vor
DOI
  • 10.1029/2021gl093930
公開者
American Geophysical Union (AGU)

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説明

<jats:title>Abstract</jats:title><jats:p>The wedge‐like and nose‐like ion spectral structures, named after their characteristic shapes in the energy‐time spectrograms, appear to be distinctively different structures in the Earth's inner magnetosphere. Here. we present a case study with conjugate observations from the Arase spacecraft and the twin Van Allen Probes on July 1 and 2, 2017, which displayed the characteristic signatures of the wedge‐like and nose‐like ion structures, respectively. When the spacecraft nearly intersected at <jats:italic>L</jats:italic> = 2.8, the two structures overlapped with enhanced ion fluxes in the energy range of 1–10 keV. These observations suggest that the wedge‐like and nose‐like spectral signatures are merely the manifestations of one single structure along different spacecraft trajectories. This finding is further validated by the reproduction of both structures from a particle‐tracing model, which also indicates their formation processes associated with the intermittent substorm injections in the nightside magnetosphere.</jats:p>

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