Browsing Bergen Open Research Archive by Author "Liu, Jian-Jun"
Now showing items 1-4 of 4
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Do the Throat Auroras Create Polar Cap Patches?
Zhang, Duan; Zhang, Qing-He; Oksavik, Kjellmar; Xu, Tong; Xing, Zan-Yang; Lyons, L.R.; Han, De-Sheng; Zhang, Hong-Bo; Ma, Yu-Zhang; Hu, Ze-Jun; Liu, Jian-Jun; Wang, Yong; Wang, Xiang-Yu (Journal article; Peer reviewed, 2023)Throat auroras and polar cap patches are common phenomena in the polar ionosphere resulting from magnetosphere-ionosphere coupling. A campaign was organized, with all-sky imagers at Yellow River Station, the European ... -
Global ULF Waves Excited by Solar Wind Dynamic Pressure Impulses: 1. Timescales and Geomagnetic Activity Dependence
Xie, Zi-Kang; Zong, Q.G.; Ren, Jie; Yue, Chao; Liu, Zhi-Yang; Liu, Jian-Jun; Hu, Ze-Jun; Li, Xing-Yu; Yin, Ze-Fan; Yan, Yun; Li, Li; Gjerløv, Jesper (Journal article; Peer reviewed, 2023)Solar wind dynamic pressure pulse is one of the sources of ultra-low frequency (ULF) waves. Based on 1-second resolution magnetic field observations from SuperMAG from 2012 to 2019, we conducted a statistical study on ... -
Global ULF Waves Excited by Solar Wind Dynamic Pressure Impulses: 2. The Spatial Distribution Asymmetry
Xie, Zi-Kang; Zong, Q.G.; Ren, Jie; Yue, Chao; Liu, Zhi-Yang; Liu, Jian-Jun; Hu, Ze-Jun; Li, Xing-Yu; Yan, Yun; Yin, Ze-Fan; Li, Li; Gjerløv, Jesper (Journal article; Peer reviewed, 2023)Asymmetry is a prevalent characteristic in numerous space physics phenomena. In this study, we investigate the statistical properties and spatial variations of ultra-low frequency power globally after positive dynamic ... -
Observational evidence for throat aurora being associated with magnetopause reconnection
Han, De-Sheng; Xu, Tong; Jin, Yaqi; Oksavik, Kjellmar; Chen, Xiangcai; Liu, Jian-Jun; Zhang, Qinghe; Baddeley, Lisa; Herlingshaw, Katie (Peer reviewed; Journal article, 2019)Throat auroras have been suggested to be related to indentations on the subsolar magnetopause. However, the indentation generation process and the resulting ionospheric responses have remained unknown. An EISCAT Svalbard ...