On the Relation Between Soft Electron Precipitations in the Cusp Region and Solar Wind Coupling Functions

doi:10.1002/2017JA024379

	On the Relation Between Soft Electron Precipitations in the Cusp Region and Solar Wind Coupling Functions
	Dang, Tong 1,2; Zhang, Binzheng 2; Wiltberge, Michael 2; Wang, Wenbin 2; Varney, Roger 3; Dou, Xiankang 1; Wan, Weixing 4; Lei, Jiuhou 1
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
	2018
卷号	123 期号:1 页码:211-226
ISSN号	2169-9380
DOI	10.1002/2017JA024379
文献子类	Article
英文摘要	In this study, the correlations between the fluxes of precipitating soft electrons in the cusp region and solar wind coupling functions are investigated utilizing the Lyon-Fedder-Mobarry global magnetosphere model simulations. We conduct two simulation runs during periods from 20 March 2008 to 16 April 2008 and from 15 to 24 December 2014, which are referred as "Equinox Case" and "Solstice Case," respectively. The simulation results of Equinox Case show that the plasma number density in the high-latitude cusp region scales well with the solar wind number density (n(cusp)/n(sw)=0.78), which agrees well with the statistical results from the Polar spacecraft measurements. For the Solstice Case, the plasma number density of high-latitude cusp in both hemispheres increases approximately linearly with upstream solar wind number density with prominent hemispheric asymmetry. Due to the dipole tilt effect, the average number density ratio n(cusp)/n(sw) in the Southern (summer) Hemisphere is nearly 3 times that in the Northern (winter) Hemisphere. In addition to the solar wind number density, 20 solar wind coupling functions are tested for the linear correlation with the fluxes of precipitating cusp soft electrons. The statistical results indicate that the solar wind dynamic pressure p exhibits the highest linear correlation with the cusp electron fluxes for both equinox and solstice conditions, with correlation coefficients greater than 0.75. The linear regression relations for equinox and solstice cases may provide an empirical calculation for the fluxes of cusp soft electron precipitation based on the upstream solar wind driving conditions.
WOS关键词	INTERPLANETARY MAGNETIC-FIELD ; EARTHS MAGNETOSPHERIC CUSPS ; POLAR CUSP ; DENSITY ENHANCEMENT ; ENERGY-TRANSFER ; ION OUTFLOW ; MODEL ; RECONNECTION ; SIMULATION ; ALTITUDES
WOS研究方向	Astronomy & Astrophysics
语种	英语
出版者	AMER GEOPHYSICAL UNION
WOS记录号	WOS:000425637600016
资助机构	National Natural Science Foundation of China(41325017 ; National Natural Science Foundation of China(41325017 ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; National Science Foundation(AGS-1555801) ; National Science Foundation(AGS-1555801) ; National Science Foundation ; National Science Foundation ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; 41274157 ; 41274157 ; 41421063) ; 41421063) ; National Natural Science Foundation of China(41325017 ; National Natural Science Foundation of China(41325017 ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; National Science Foundation(AGS-1555801) ; National Science Foundation(AGS-1555801) ; National Science Foundation ; National Science Foundation ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; 41274157 ; 41274157 ; 41421063) ; 41421063) ; National Natural Science Foundation of China(41325017 ; National Natural Science Foundation of China(41325017 ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; National Science Foundation(AGS-1555801) ; National Science Foundation(AGS-1555801) ; National Science Foundation ; National Science Foundation ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; 41274157 ; 41274157 ; 41421063) ; 41421063) ; National Natural Science Foundation of China(41325017 ; National Natural Science Foundation of China(41325017 ; Thousand Young Talents Program of China ; Thousand Young Talents Program of China ; National Science Foundation(AGS-1555801) ; National Science Foundation(AGS-1555801) ; National Science Foundation ; National Science Foundation ; National Science Foundation (NSF) ; National Science Foundation (NSF) ; 41274157 ; 41274157 ; 41421063) ; 41421063)
内容类型	期刊论文
源URL	[http://ir.iggcas.ac.cn/handle/132A11/82852]
专题	中国科学院地质与地球物理研究所
通讯作者	Lei, Jiuhou
作者单位	1.Univ Sci & Technol China, Sch Earth & Space Sci, CAS Key Lab Geospace Environm, Hefei, Anhui, Peoples R China 2.Natl Ctr Atmospher Res, High Altitude Observ, Pob 3000, Boulder, CO 80307 USA 3.SRI Int, Ctr Geospace Studies, 333 Ravenswood Ave, Menlo Pk, CA 94025 USA 4.Chinese Acad Sci, Inst Geol & Geophys, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Dang, Tong,Zhang, Binzheng,Wiltberge, Michael,et al. On the Relation Between Soft Electron Precipitations in the Cusp Region and Solar Wind Coupling Functions[J]. JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,2018,123(1):211-226.
APA	Dang, Tong.,Zhang, Binzheng.,Wiltberge, Michael.,Wang, Wenbin.,Varney, Roger.,...&Lei, Jiuhou.(2018).On the Relation Between Soft Electron Precipitations in the Cusp Region and Solar Wind Coupling Functions.JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS,123(1),211-226.
MLA	Dang, Tong,et al."On the Relation Between Soft Electron Precipitations in the Cusp Region and Solar Wind Coupling Functions".JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS 123.1(2018):211-226.