Volume 34 Issue 1
Jan.  2014
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Xia Zhiyang, Wang Chi, Peng Zhong, Lu Quanming. Relationship between interplanetary magnetic field clock angle and magnetosphere open magnetic flux[J]. Journal of Space Science, 2014, 34(1): 24-28. doi: 10.11728/cjss2014.01.024
Citation: Xia Zhiyang, Wang Chi, Peng Zhong, Lu Quanming. Relationship between interplanetary magnetic field clock angle and magnetosphere open magnetic flux[J]. Journal of Space Science, 2014, 34(1): 24-28. doi: 10.11728/cjss2014.01.024

Relationship between interplanetary magnetic field clock angle and magnetosphere open magnetic flux

doi: 10.11728/cjss2014.01.024
  • Received Date: 2013-03-08
  • Rev Recd Date: 2013-07-10
  • Publish Date: 2014-01-15
  • The open magnetic flux (Fpc) is a key parameter to study magnetospheric dynamical process, which is closely related to magnetic reconnections in the dayside magnetopause and magnetotail. The dayside reconnection rate controls the amount of the open magnetic flux, which is affected by various solar wind parameters, among which the clock angle θc of the interplanetary magnetic field (IMF) is an important factor that influence the dayside reconnection rate. Using global MHD simulations, we analyze the relationship between θc and Fpc. The results show that the open flux Fpc increases as the clock angle θc approaches 180°(due southward), and the open flux Fpc is proportional to sin3/2 (θc/2). This reflects the physical connection between them, since θc describes the magnitude of the shear between IMF and terrestrial magnetic field, and affects the dayside reconnection rate, thus controlling the open flux Fpc.

     

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