IGGCAS OpenIR  > 地球与行星物理院重点实验室
Estimating the Kinetic Energy Budget of the Polar Wind Outflow
Li, Kun1; 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
2018-09-01
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
ISSN2169-9380
Volume123Issue:9Pages:7917-7929
AbstractIonospheric 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.
Keywordpolar wind ionospheric outflow solar wind solar illumination energy transfer
DOI10.1029/2018JA025819
Funding OrganizationState 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
WOS KeywordMAGNETOTAIL LOBES ; COLD-PLASMA ; MAGNETOSPHERE ; ACCELERATION ; EARTH
Language英语
Funding ProjectState 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]
Funding OrganizationState 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
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000448376600054
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Document Type期刊论文
Identifierhttp://ir.iggcas.ac.cn/handle/132A11/89129
Collection地球与行星物理院重点实验室
Corresponding AuthorLi, Kun
Affiliation1.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
Recommended Citation
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.
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