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A Space Hurricane over the Earth’s Polar Ionosphere
ID：183 View Protection：ATTENDEE Updated Time：2021-06-15 16:21:24 Hits：2240 Invited speech

Start Time：2021-07-10 13:30（Asia/Shanghai）

Duration：20min

Session：S9B 9B、行星科学与空间物理 » S9B-19B、行星科学与空间物理-1

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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 in Earth’s upper atmosphere. Here we report a long-lasting space hurricane in the polar ionosphere and magnetosphere during low solar and otherwise low geomagnetic activity. This hurricane shows strong circular horizontal plasma flow with shears, a nearly zero-flow center, and a coincident cyclone-shaped aurora caused by strong electron precipitation associated with intense upward magnetic field-aligned currents. Near the center, precipitating electrons were substantially accelerated to ~10 keV. The hurricane imparted large energy and momentum deposition into the ionosphere despite otherwise extremely quiet conditions. The observations and simulations reveal that the space hurricane is generated by steady high-latitude lobe magnetic reconnection and current continuity during a several hour period of northward interplanetary magnetic field and very low solar wind density and speed.
 
Keywords
Aurora,Space hurricane,Magnetosphere-ionosphere coupling,Polar ionosphere
Speaker
张清和
山东大学

Submission Author
张清和 Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, Shandong, China
ZhangYongliang The Johns Hopkins University Applied Physics Laboratory, Laurel, Maryland, USA
王赤 State Key Laboratory of Space Weather, Center for Space Science and Applied Research, Chinese Academy of Sciences, Beijing, China.
OksavikKjellmar Birkeland Centre for Space Science, Department of Physics and Technology, University of Bergen, Bergen, Norway
LyonsLarry R. Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, CA, USA
LockwoodMichael Department of Meteorology, University of Reading, Reading, UK
杨惠根 Ministry of Natural Resources Key Laboratory of Polar Science, Polar Research Institute of China, Shanghai, PR China
唐斌斌 中国科学院国家空间科学中心
MoenJøran Idar Department of Physics, University of Oslo, Blindern, Oslo, Norway
邢赞扬 Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, Shandong, China
马羽璋 Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, Shandong, China
王翔宇 Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, Shandong, China
宁亚飞 School of Microelectronic, Shandong University, Jinan, Shandong, China
夏利东 Shandong Provincial Key Laboratory of Optical Astronomy and Solar-Terrestrial Environment, Institute of Space Sciences, Shandong University, Weihai, Shandong, China
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Important Date

  • Conference Date

    Jul 09

    2021

    to

    Jul 11

    2021

  • May 30 2021

    Abstract Submission Deadline

  • May 30 2021

    Draft paper submission deadline

  • May 30 2021

    Early Bird Registration

  • Jul 10 2021

    Registration deadline

  • Jul 11 2021

    Contribution Submission Deadline

Sponsored By
青年地学论坛理事会
Organized By
中国科学院地球化学研究所
贵州大学
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