Plasma Sheet Pressure Variations in the Near-Earth Magnetotail During Substorm Growth Phase: THEMIS Observations
文献类型:期刊论文
作者 | Sun, W. J.1,2,3; Fu, S. Y.3; Wei, Y.1,2,4; Yao, Z. H.5; Rong, Z. J.1,2,4; Zhou, X. Z.3; Slavin, J. A.6; Wan, W. X.1,2,4; Zong, Q. G.3; Pu, Z. Y.3 |
刊名 | JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS |
出版日期 | 2017-12-01 |
卷号 | 122期号:12页码:12212-12228 |
ISSN号 | 2169-9380 |
DOI | 10.1002/2017JA024603 |
文献子类 | Article |
英文摘要 | We investigate the plasma sheet pressure variations in the near-Earth magnetotail (radius distance, R, from 7.5 R-E to 12 R-E and magnetic local time, MLT, from 18: 00 to 06: 00) during substorm growth phase with Time History of Events and Macroscale Interactions during Substorms (THEMIS) observations. It is found that, during the substorm growth phase, about 39.4% (76/193) of the selected events display a phenomenon of equatorial plasma pressure (P-eq) decrease. The occurrence rates of P-eq decrease cases are higher in the dawn (04: 00 to 06: 00) and dusk (18: 00 to 20: 00) flanks (> 50%) than in the midnight region (20: 00 to 04: 00, < 40%). The mean values of the maximum percentages of Peq decrease during the substorm growth phases are larger in the dawn and dusk flanks (similar to - 20%) than in the midnight region (similar to > - 16%). The mean value of P-eq increase percentages at the end of substorm growth phase is the highest (similar to 40%) in the premidnight MLT bin (22: 00 to 00: 00) and is almost unchanged in the dawn and dusk flanks. Further investigations show that 13.0% of the events have more than 10% of P-eq decrease at the end of substorm growth phase comparing to the value before the growth phase, and similar to 28.0% of the events have small changes (< 10%), and similar to 59.0% events have a more than 10% increase. This study also reveals the importance of electron pressure (P-e) in the variation of P-eq in the substorm growth phase. The P-e variations often account for more than 50% of the P-eq changes, and the ratios of P-e to ion pressure often display large variations (similar to 50%). Among the investigated events, during the growth phase, an enhanced equatorial plasma convection flow is observed, which diverges in the midnight tail region and propagates azimuthally toward the dayside magnetosphere with velocity of similar to 20 km/s. It is proposed that the P-eq decreases in the near-Earth plasma sheet during the substorm growth phase may be due to the transport of closed magnetic flux toward the dayside magnetosphere driven by dayside magnetopause reconnection. Both solar wind and ionospheric conductivity effects may influence the distributions of occurrence rates for P-eq decrease events and the P-eq increase percentages in the investigated region. |
WOS关键词 | THIN CURRENT SHEET ; MAGNETIC-FIELD ; MAGNETOSPHERIC SUBSTORMS ; NEUTRAL LINE ; LOCATION ; MODEL ; TEMPERATURE ; DEPLETION ; GEOTAIL ; AVERAGE |
WOS研究方向 | Astronomy & Astrophysics |
语种 | 英语 |
出版者 | AMER GEOPHYSICAL UNION |
WOS记录号 | WOS:000422735500036 |
资助机构 | NASA(NAS5-02099) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; European Union ; European Union ; European Union ; European Union ; University of Liege ; University of Liege ; University of Liege ; University of Liege ; 41731068 ; 41731068 ; 41731068 ; 41731068 ; 41525016 ; 41525016 ; 41525016 ; 41525016 ; 41474155 ; 41474155 ; 41474155 ; 41474155 ; 41474139 ; 41474139 ; 41474139 ; 41474139 ; 41661164034 ; 41661164034 ; 41661164034 ; 41661164034 ; 41274167) ; 41274167) ; 41274167) ; 41274167) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; European Union ; European Union ; European Union ; European Union ; University of Liege ; University of Liege ; University of Liege ; University of Liege ; 41731068 ; 41731068 ; 41731068 ; 41731068 ; 41525016 ; 41525016 ; 41525016 ; 41525016 ; 41474155 ; 41474155 ; 41474155 ; 41474155 ; 41474139 ; 41474139 ; 41474139 ; 41474139 ; 41661164034 ; 41661164034 ; 41661164034 ; 41661164034 ; 41274167) ; 41274167) ; 41274167) ; 41274167) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; European Union ; European Union ; European Union ; European Union ; University of Liege ; University of Liege ; University of Liege ; University of Liege ; 41731068 ; 41731068 ; 41731068 ; 41731068 ; 41525016 ; 41525016 ; 41525016 ; 41525016 ; 41474155 ; 41474155 ; 41474155 ; 41474155 ; 41474139 ; 41474139 ; 41474139 ; 41474139 ; 41661164034 ; 41661164034 ; 41661164034 ; 41661164034 ; 41274167) ; 41274167) ; 41274167) ; 41274167) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; NASA(NAS5-02099) ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Ministry for Economy and Technology ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; German Center for Aviation and Space (DLR)(50 OC 0302) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; National Postdoctoral Program for Innovative Talents(BX201600158) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; China Postdoctoral Science Foundation(2016M600124) ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; National Natural Science Foundation of China(41704163 ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; European Union ; European Union ; European Union ; European Union ; University of Liege ; University of Liege ; University of Liege ; University of Liege ; 41731068 ; 41731068 ; 41731068 ; 41731068 ; 41525016 ; 41525016 ; 41525016 ; 41525016 ; 41474155 ; 41474155 ; 41474155 ; 41474155 ; 41474139 ; 41474139 ; 41474139 ; 41474139 ; 41661164034 ; 41661164034 ; 41661164034 ; 41661164034 ; 41274167) ; 41274167) ; 41274167) ; 41274167) |
源URL | [http://ir.iggcas.ac.cn/handle/132A11/82573] |
专题 | 中国科学院地质与地球物理研究所 |
通讯作者 | Sun, W. J. |
作者单位 | 1.Chinese Acad Sci, Inst Geol & Geophys, Key Lab Earth & Planetary Phys, Beijing, Peoples R China 2.Chinese Acad Sci, Inst Earth Sci, Beijing, Peoples R China 3.Peking Univ, Sch Earth & Space Sci, Beijing, Peoples R China 4.Univ Chinese Acad Sci, Coll Earth Sci, Beijing, Peoples R China 5.Univ Liege, STAR Inst, Lab Phys Atmospher & Planetaire, Liege, Belgium 6.Univ Michigan, Dept Climate & Space Sci & Engn, Ann Arbor, MI 48109 USA 7.Shandong Univ, Sch Space Sci & Phys, Shandong Prov Key Lab Opt Astron & Solar Terr Env, Weihai, Peoples R China |
推荐引用方式 GB/T 7714 | Sun, W. J.,Fu, S. Y.,Wei, Y.,et al. Plasma Sheet Pressure Variations in the Near-Earth Magnetotail During Substorm Growth Phase: THEMIS Observations[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2017,122(12):12212-12228. |
APA | Sun, W. J..,Fu, S. Y..,Wei, Y..,Yao, Z. H..,Rong, Z. J..,...&Shen, X. C..(2017).Plasma Sheet Pressure Variations in the Near-Earth Magnetotail During Substorm Growth Phase: THEMIS Observations.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,122(12),12212-12228. |
MLA | Sun, W. J.,et al."Plasma Sheet Pressure Variations in the Near-Earth Magnetotail During Substorm Growth Phase: THEMIS Observations".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 122.12(2017):12212-12228. |
入库方式: OAI收割
来源:地质与地球物理研究所
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