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Statistical Study of the Relationship Between Ion Upflow and Field-Aligned Current in the Topside Ionosphere for Both Hemispheres During Geomagnetic Disturbed and Quiet Time

Ma, Yu-Zhang; Zhang, Qing-He; Jayachandran, Periyadan T.; Oksavik, Kjellmar; Lyons, Lawrence R.; Xing, Zan-Yang; Zhou, Shan-Yu; Hairston, Marc; Wang, Yong
Journal article, Peer reviewed
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URI
https://hdl.handle.net/11250/2757346
Date
2020
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  • Department of Physics and Technology [1830]
  • Registrations from Cristin [5607]
Original version
Journal of Geophysical Research (JGR): Space Physics. 2020, 125(9), e2019JA027538   10.1029/2019JA027538
Abstract
A statistical study of ion upflow and field‐aligned currents (FACs) has been performed in the topside ionosphere of both hemispheres for magnetic quiet and disturbed times by using DMSP satellite observations from 2010–2013. Distributions in MLT/MLat reveal that ion upflow occurrence shows a dawn‐dusk asymmetry distribution that matches well with the Region 1 FACs. In addition, there are highest occurrence regions near noon and within the midnight auroral disturbance area, corresponding to dayside cusp and nightside auroral disturbance regions, respectively. Both the ion upflow occurrence and FAC regions expand equatorward to a wider area during disturbed times.
Publisher
AGU
Journal
Journal of Geophysical Research (JGR): Space Physics
Copyright
Copyright 2020. American Geophysical Union. All Rights Reserved.

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