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The Polar Wind Modulated by the Spatial Inhomogeneity of the Strength of the Earth's Magnetic Field
Li, Kun1; Foerster, Matthias2,3; Rong, Zhaojin4,5; Haaland, Stein2,6; Kronberg, Elena2,7; Cui, Jun1,8; Chai, Lihui4,5; Wei, Yong4,5
2020-04-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN2169-9380
Volume125Issue:4Pages:12
AbstractWhen the geomagnetic field is weak, the small mirror force allows precipitating charged particles to deposit energy in the ionosphere. This leads to an increase in ionospheric outflow from the Earth's polar cap region, but such an effect has not been previously observed because the energies of the ions of the polar ionospheric outflow are too low, making it difficult to detect the low-energy ions with a positively charged spacecraft. In this study, we found an anticorrelation between ionospheric outflow and the strength of the Earth's magnetic field. Our results suggest that the electron precipitation through the polar rain can be a main energy source of the polar wind during periods of high levels of solar activity. The decreased magnetic field due to spatial inhomogeneity of the Earth's magnetic field and its effect on outflow can be used to study the outflow in history when the magnetic field was at similar levels.
Funding OrganizationNational Natural Scientific Foundation of China ; National Natural Scientific Foundation of China ; Norwegian Research Council ; Norwegian Research Council ; German Science Foundation (DFG) ; German Science Foundation (DFG) ; National Natural Scientific Foundation of China ; National Natural Scientific Foundation of China ; Norwegian Research Council ; Norwegian Research Council ; German Science Foundation (DFG) ; German Science Foundation (DFG) ; National Natural Scientific Foundation of China ; National Natural Scientific Foundation of China ; Norwegian Research Council ; Norwegian Research Council ; German Science Foundation (DFG) ; German Science Foundation (DFG) ; National Natural Scientific Foundation of China ; National Natural Scientific Foundation of China ; Norwegian Research Council ; Norwegian Research Council ; German Science Foundation (DFG) ; German Science Foundation (DFG)
DOI10.1029/2020JA027802
WOS KeywordNORTH-SOUTH ASYMMETRIES ; DAWN-DUSK ASYMMETRY ; IONOSPHERIC OUTFLOW ; ENERGY DEPOSITION ; ION ESCAPE ; PLASMA ; RAIN ; MAGNETOSPHERE ; ATMOSPHERE ; ELECTRONS
Language英语
Funding ProjectNational Natural Scientific Foundation of China[41704164] ; National Natural Scientific Foundation of China[41774188] ; Norwegian Research Council[223252] ; German Science Foundation (DFG)[KR 4375/2-1]
Funding OrganizationNational Natural Scientific Foundation of China ; National Natural Scientific Foundation of China ; Norwegian Research Council ; Norwegian Research Council ; German Science Foundation (DFG) ; German Science Foundation (DFG) ; National Natural Scientific Foundation of China ; National Natural Scientific Foundation of China ; Norwegian Research Council ; Norwegian Research Council ; German Science Foundation (DFG) ; German Science Foundation (DFG) ; National Natural Scientific Foundation of China ; National Natural Scientific Foundation of China ; Norwegian Research Council ; Norwegian Research Council ; German Science Foundation (DFG) ; German Science Foundation (DFG) ; National Natural Scientific Foundation of China ; National Natural Scientific Foundation of China ; Norwegian Research Council ; Norwegian Research Council ; German Science Foundation (DFG) ; German Science Foundation (DFG)
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000536831100019
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/83441
Collection中国科学院国家天文台
Corresponding AuthorLi, Kun
Affiliation1.Sun Yat Sen Univ, Sch Atmospher Sci, Planetary Environm & Astrobiol Res Lab Pearl, Zhuhai, Peoples R China
2.Max Planck Inst Solar Syst Res, Gottingen, Germany
3.Helmholtz Ctr Potsdam, German Res Ctr Geosci, Potsdam, Germany
4.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
5.Univ Chinese Acad Sci, Coll Earth & Planetary Sci, Beijing, Peoples R China
6.Univ Bergen, Birkeland Ctr Space Sci, Bergen, Norway
7.Ludwig Maximilian Univ Munich, Dept Earth & Environm Sci, Munich, Germany
8.Chinese Acad Sci, Key Lab Lunar & Deep Space Explorat, Natl Astron Observ, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Li, Kun,Foerster, Matthias,Rong, Zhaojin,et al. The Polar Wind Modulated by the Spatial Inhomogeneity of the Strength of the Earth's Magnetic Field[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2020,125(4):12.
APA Li, Kun.,Foerster, Matthias.,Rong, Zhaojin.,Haaland, Stein.,Kronberg, Elena.,...&Wei, Yong.(2020).The Polar Wind Modulated by the Spatial Inhomogeneity of the Strength of the Earth's Magnetic Field.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,125(4),12.
MLA Li, Kun,et al."The Polar Wind Modulated by the Spatial Inhomogeneity of the Strength of the Earth's Magnetic Field".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 125.4(2020):12.
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