Browsing Fysisk institutt by Author "Ma, Yu-Zhang"

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  • A space hurricane over the Earth’s polar ionosphere 
    Zhang, Qing-He; Zhang, Yong-Liang; Wang, Chi; Oksavik, Kjellmar; Lyons, Larry R.; Lockwood, Michael; Yang, Hui-Gen; Tang, Bin-Bin; Moen, Jøran Idar; Xing, Zan-Yang; Ma, Yu-Zhang; Wang, Xiang-Yu; Ning, Ya-Fei; Xia, Li-Dong (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2021)
    Abstract In Earth’s low atmosphere, hurricanes are destructive due to their great size, strong spiral winds with shears, and intense rain/precipitation. However, disturbances resembling hurricanes have not been detected ...
  • Combined Contribution of Solar Illumination, Solar Activity, and Convection to Ion Upflow Above the Polar Cap 
    Ma, Yu-Zhang; Zhang, Qing-He; Xing, Zan-Yang; Jayachandran, P.T.; Moen, Jøran Idar; Heelis, Roderick A.; Wang, Yong (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2018)
    By analyzing a five‐year period (2010–2014) of Defense Meteorological Satellite Program (DMSP) plasma data, we investigated ion upflow occurrence, speed, density, and flux above the polar cap in the northern hemisphere ...
  • Multiple transpolar auroral arcs reveal insight about coupling processes in the Earth’s magnetotail 
    Zhang, Qing-He; Zhang, Yong-Liang; Wang, Chi; Lockwood, Michael; Yang, Hui-Gen; Tang, Bin-Bin; Xing, Zan-Yang; Oksavik, Kjellmar; Lyons, Larry R.; Ma, Yu-Zhang; Zong, Qiu-Gang; Moen, Jøran Idar; Xia, Li-Dong (Journal article / Tidsskriftartikkel / PublishedVersion; Peer reviewed, 2020)
    A distinct class of aurora, called transpolar auroral arc (TPA) (in some cases called “theta” aurora), appears in the extremely high-latitude ionosphere of the Earth when interplanetary magnetic field (IMF) is northward. ...