TC-1 observations of flux pileup and dipolarization-associated expansion in the near-Earth magnetotail during substorms

Hui Zhang; Z. Y. Pu; X. Cao; Suiyan Y. Fu; Z. X. Liu; Z. W. Ma; M. W. Dunlop; W. Baumjohann; C. J. Xiao; M. H. Hong; J. B. Cao; Qiu Gang Zong; X. G. Wang; C. M. Carr; Henri A. Rème; Iannis Dandouras; A. Fazakerley; H. U. Frey; C. Philippe Escoubet

doi:10.1029/2006GL028326

TC-1 observations of flux pileup and dipolarization-associated expansion in the near-Earth magnetotail during substorms

Hui Zhang^*
, Z. Y. Pu
, X. Cao
, Suiyan Y. Fu
, Z. X. Liu
, Z. W. Ma
, M. W. Dunlop
, W. Baumjohann
, C. J. Xiao
, M. H. Hong
, J. B. Cao
, Qiu Gang Zong
, X. G. Wang
, C. M. Carr
, Henri A. Rème
, Iannis Dandouras
, A. Fazakerley
, H. U. Frey
, C. Philippe Escoubet

^*Corresponding author for this work

Peking University
CAS - National Space Science Center
Zhejiang University
Rutherford Appleton Laboratory
Austrian Academy of Sciences
CAS - National Astronomical Observatories
Chinese Academy of Sciences
University of Massachusetts Lowell
Imperial College London
CNRS
University College London
University of California at Berkeley
ESA/ESTEC

Research output: Contribution to journal › Article › peer-review

35 Scopus citations

Abstract

Fifty-three substorms measured by Double Star/TC-1 in the near-Earth magnetotail from July to October, 2004 are studied. The main features of these events are: (a) Magnetic flux pileup characterized by continuous enhancement of B_z is observed, which starts almost simultaneously with aurora breakup within 1-3 minutes, indicating that substorm onset is in close relation to flux pileup. (b) Sudden plasma sheet expansion with sharp increases in ion temperature and density is seen in all events, which occurs typically ∼11 minutes after the beginning of pileup. The plasma sheet expansion is shown to be in close relation with the primary substorm dipolarization and, hence, can be referred to as 'dipolarization-associated expansion'. (c) Evidence indicates that the substorm current wedge first forms earthward of TC-1 position and, hence, inward of the flow braking region, and then propagates tailward with an expansion in the Z-direction. Possible implications of these observations are briefly discussed.

Original language	English
Article number	L03104
Journal	Geophysical Research Letters
Volume	34
Issue number	3
DOIs	https://doi.org/10.1029/2006GL028326
State	Published - 16 Feb 2007
Externally published	Yes

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10.1029/2006GL028326

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Zhang, H., Pu, Z. Y., Cao, X., Fu, S. Y., Liu, Z. X., Ma, Z. W., Dunlop, M. W., Baumjohann, W., Xiao, C. J., Hong, M. H., Cao, J. B., Zong, Q. G., Wang, X. G., Carr, C. M., Rème, H. A., Dandouras, I., Fazakerley, A., Frey, H. U., & Escoubet, C. P. (2007). TC-1 observations of flux pileup and dipolarization-associated expansion in the near-Earth magnetotail during substorms. Geophysical Research Letters, 34(3), Article L03104. https://doi.org/10.1029/2006GL028326

@article{c25b3f7c565b493399d5605c661bd7d4,

title = "TC-1 observations of flux pileup and dipolarization-associated expansion in the near-Earth magnetotail during substorms",

abstract = "Fifty-three substorms measured by Double Star/TC-1 in the near-Earth magnetotail from July to October, 2004 are studied. The main features of these events are: (a) Magnetic flux pileup characterized by continuous enhancement of Bz is observed, which starts almost simultaneously with aurora breakup within 1-3 minutes, indicating that substorm onset is in close relation to flux pileup. (b) Sudden plasma sheet expansion with sharp increases in ion temperature and density is seen in all events, which occurs typically ∼11 minutes after the beginning of pileup. The plasma sheet expansion is shown to be in close relation with the primary substorm dipolarization and, hence, can be referred to as 'dipolarization-associated expansion'. (c) Evidence indicates that the substorm current wedge first forms earthward of TC-1 position and, hence, inward of the flow braking region, and then propagates tailward with an expansion in the Z-direction. Possible implications of these observations are briefly discussed.",

author = "Hui Zhang and Pu, \{Z. Y.\} and X. Cao and Fu, \{Suiyan Y.\} and Liu, \{Z. X.\} and Ma, \{Z. W.\} and Dunlop, \{M. W.\} and W. Baumjohann and Xiao, \{C. J.\} and Hong, \{M. H.\} and Cao, \{J. B.\} and Zong, \{Qiu Gang\} and Wang, \{X. G.\} and Carr, \{C. M.\} and R{\`e}me, \{Henri A.\} and Iannis Dandouras and A. Fazakerley and Frey, \{H. U.\} and Escoubet, \{C. Philippe\}",

year = "2007",

month = feb,

day = "16",

doi = "10.1029/2006GL028326",

language = "英语",

volume = "34",

journal = "Geophysical Research Letters",

issn = "0094-8276",

publisher = "John Wiley and Sons Inc",

number = "3",

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Zhang, H, Pu, ZY, Cao, X, Fu, SY, Liu, ZX, Ma, ZW, Dunlop, MW, Baumjohann, W, Xiao, CJ, Hong, MH, Cao, JB, Zong, QG, Wang, XG, Carr, CM, Rème, HA, Dandouras, I, Fazakerley, A, Frey, HU & Escoubet, CP 2007, 'TC-1 observations of flux pileup and dipolarization-associated expansion in the near-Earth magnetotail during substorms', Geophysical Research Letters, vol. 34, no. 3, L03104. https://doi.org/10.1029/2006GL028326

TY - JOUR

T1 - TC-1 observations of flux pileup and dipolarization-associated expansion in the near-Earth magnetotail during substorms

AU - Zhang, Hui

AU - Pu, Z. Y.

AU - Cao, X.

AU - Fu, Suiyan Y.

AU - Liu, Z. X.

AU - Ma, Z. W.

AU - Dunlop, M. W.

AU - Baumjohann, W.

AU - Xiao, C. J.

AU - Hong, M. H.

AU - Cao, J. B.

AU - Zong, Qiu Gang

AU - Wang, X. G.

AU - Carr, C. M.

AU - Rème, Henri A.

AU - Dandouras, Iannis

AU - Fazakerley, A.

AU - Frey, H. U.

AU - Escoubet, C. Philippe

PY - 2007/2/16

Y1 - 2007/2/16

N2 - Fifty-three substorms measured by Double Star/TC-1 in the near-Earth magnetotail from July to October, 2004 are studied. The main features of these events are: (a) Magnetic flux pileup characterized by continuous enhancement of Bz is observed, which starts almost simultaneously with aurora breakup within 1-3 minutes, indicating that substorm onset is in close relation to flux pileup. (b) Sudden plasma sheet expansion with sharp increases in ion temperature and density is seen in all events, which occurs typically ∼11 minutes after the beginning of pileup. The plasma sheet expansion is shown to be in close relation with the primary substorm dipolarization and, hence, can be referred to as 'dipolarization-associated expansion'. (c) Evidence indicates that the substorm current wedge first forms earthward of TC-1 position and, hence, inward of the flow braking region, and then propagates tailward with an expansion in the Z-direction. Possible implications of these observations are briefly discussed.

AB - Fifty-three substorms measured by Double Star/TC-1 in the near-Earth magnetotail from July to October, 2004 are studied. The main features of these events are: (a) Magnetic flux pileup characterized by continuous enhancement of Bz is observed, which starts almost simultaneously with aurora breakup within 1-3 minutes, indicating that substorm onset is in close relation to flux pileup. (b) Sudden plasma sheet expansion with sharp increases in ion temperature and density is seen in all events, which occurs typically ∼11 minutes after the beginning of pileup. The plasma sheet expansion is shown to be in close relation with the primary substorm dipolarization and, hence, can be referred to as 'dipolarization-associated expansion'. (c) Evidence indicates that the substorm current wedge first forms earthward of TC-1 position and, hence, inward of the flow braking region, and then propagates tailward with an expansion in the Z-direction. Possible implications of these observations are briefly discussed.

UR - https://www.scopus.com/pages/publications/34548041189

U2 - 10.1029/2006GL028326

DO - 10.1029/2006GL028326

M3 - 文章

AN - SCOPUS:34548041189

SN - 0094-8276

VL - 34

JO - Geophysical Research Letters

JF - Geophysical Research Letters

IS - 3

M1 - L03104

ER -

TC-1 observations of flux pileup and dipolarization-associated expansion in the near-Earth magnetotail during substorms

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