Estimating the Kinetic Energy Budget of the Polar Wind Outflow

doi:10.1029/2018JA025819

CORC > 地质与地球物理研究所 > 中国科学院地质与地球物理研究所 > 中国科学院地球与行星物理重点实验室

	Estimating the Kinetic Energy Budget of the Polar Wind Outflow
	Li, Kun 1; Wei, Y.1,2,3; Haaland, S.4,5; Kronberg, E. A.4,6; Rong, Z. J.1,2,3; Maes, L.4; Maggiolo, R.7; Andre, M.8; Nilsson, H.9; Grigorenko, E.10
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2018-09-01
卷号	123 期号:9 页码:7917-7929
关键词	polar wind ionospheric outflow solar wind solar illumination energy transfer
ISSN号	2169-9380
DOI	10.1029/2018JA025819
英文摘要	Ionospheric outflow from the polar cap through the polar wind plays an important role in the evolution of the atmosphere and magnetospheric dynamics. Both solar illumination and solar wind energy input are known to be energy sources of the polar wind. However, observational studies of the energy transfer from these two energy sources to the polar wind are difficult. Because of their low energy, polar wind ions are invisible to regular ion detectors onboard a positively charged spacecraft. Using a new technique that indirectly measures these low-energy ions, we are able to estimate the energy budget of the polar wind. Our results show that solar illumination provides about 10(7) W of the kinetic energy of the polar wind, in addition to the energy transferred from the solar wind with a maximum rate of about 10(8) W. The energy transfer efficiency of solar illumination to the kinetic energy of the polar wind is about 6 to 7 orders of magnitude lower than that of the solar wind. Moreover, daily and seasonal changes in the orientation of the geomagnetic dipole axis control solar illumination over the polar cap, modulating both energies of the polar wind and energy transfer efficiencies from the two energy sources.
资助项目	State Key Laboratory of Space Weather, Chinese Academy of Science[2017-47F-01-04] ; National Natural Science Foundation of China[41704164] ; National Natural Science Foundation of China[41525016] ; National Natural Science Foundation of China[41474155] ; National Natural Science Foundation of China[41661164034] ; National Natural Science Foundation of China[41621004]
WOS关键词	MAGNETOTAIL LOBES ; COLD-PLASMA ; MAGNETOSPHERE ; ACCELERATION ; EARTH
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000448376600054
资助机构	State Key Laboratory of Space Weather, Chinese Academy of Science ; State Key Laboratory of Space Weather, Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Space Weather, Chinese Academy of Science ; State Key Laboratory of Space Weather, Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Space Weather, Chinese Academy of Science ; State Key Laboratory of Space Weather, Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China ; State Key Laboratory of Space Weather, Chinese Academy of Science ; State Key Laboratory of Space Weather, Chinese Academy of Science ; National Natural Science Foundation of China ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/89129]
专题	地质与地球物理研究所_中国科学院地球与行星物理重点实验室
通讯作者	Li, Kun
作者单位	1.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China 3.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China 4.Max Planck Inst Solar Syst Res, Gottingen, Germany 5.Univ Bergen, Birkeland Ctr Space Sci, Dept Phys & Technol, Bergen, Norway 6.Ludwig Maximilian Univ Munich, Dept Earth & Environm Sci Geophys, Munich, Germany 7.Belgian Inst Space Aeron, Brussels, Belgium 8.Swedish Inst Space Phys, Uppsala, Sweden 9.Swedish Inst Space Phys, Kiruna, Sweden 10.Space Res Inst RAS, Moscow, Russia
推荐引用方式 GB/T 7714	Li, Kun,Wei, Y.,Haaland, S.,et al. Estimating the Kinetic Energy Budget of the Polar Wind Outflow[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2018,123(9):7917-7929.
APA	Li, Kun.,Wei, Y..,Haaland, S..,Kronberg, E. A..,Rong, Z. J..,...&Grigorenko, E..(2018).Estimating the Kinetic Energy Budget of the Polar Wind Outflow.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,123(9),7917-7929.
MLA	Li, Kun,et al."Estimating the Kinetic Energy Budget of the Polar Wind Outflow".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 123.9(2018):7917-7929.