Field-aligned currents associated with dipolarization fronts

doi:10.1002/grl.50902

CORC > 北京大学 > 地球与空间科学学院

	Field-aligned currents associated with dipolarization fronts
	Sun, W. J. ; Fu, S. Y. ; Parks, G. K. ; Liu, J. ; Yao, Z. H. ; Shi, Q. Q. ; Zong, Q.G. ; Huang, S. Y. ; Pu, Z. Y. ; Xiao, T.
刊名	geophysical research letters
	2013
关键词	Field aligned current dipolarization front PLASMA SHEET CLUSTER FLOW
DOI	10.1002/grl.50902
英文摘要	Current densities associated with dipolarization fronts (DFs) have been calculated in the geomagnetic tail using the curlometer technique applied to high-resolution magnetic field EB data obtained by the four Cluster spacecraft. We then use the relation D * b E similar to () to characterize the behavior of field-aligned current (FAC) during 25 DF events. Our results show that the magnitude of FAC density (J//) ranges from 5 to 20 nA/m2, and they are observed in Northern and Southern Hemispheres flowing along both directions of the EB-field. The FACs have dimensions characteristic of the DFs and with region-1 current sense flowing inside the DFs and region-2 sense just in front of DF (in the B-z dips). Most of our observations come from 15 to 20 R-E in the tail, different from previous statistical studies based mainly on observations made around 9-12 RE. We suggest that DFs can sustain significant FACs and appear as " wedgelets" in the early stage.; Geosciences, Multidisciplinary; SCI(E); EI; 9; ARTICLE; 17; 4503-4508; 40
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/311067]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Sun, W. J.,Fu, S. Y.,Parks, G. K.,et al. Field-aligned currents associated with dipolarization fronts[J]. geophysical research letters,2013.
APA	Sun, W. J..,Fu, S. Y..,Parks, G. K..,Liu, J..,Yao, Z. H..,...&Xiao, T..(2013).Field-aligned currents associated with dipolarization fronts.geophysical research letters.
MLA	Sun, W. J.,et al."Field-aligned currents associated with dipolarization fronts".geophysical research letters (2013).