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DOI: 10.1002/2016GL069520
Title:
A comparative study of dipolarization fronts at MMS and Cluster
Author: Schmid D.; Nakamura R.; Volwerk M.; Plaschke F.; Narita Y.; Baumjohann W.; Magnes W.; Fischer D.; Eichelberger H.U.; Torbert R.B.; Russell C.T.; Strangeway R.J.; Leinweber H.K.; Le G.; Bromund K.R.; Anderson B.J.; Slavin J.A.; Kepko E.L.
Source Publication: Geophysical Research Letters
ISSN: 0094-9721
EISSN: 1944-9452
Publishing Year: 2016
Volume: 43, Issue:12
pages begin: 6012
pages end: 6019
Language: 英语
Keyword: Cluster ; dipolarization front ; magnetotail ; MMS
Scopus Keyword: Magnetic fields ; Cluster ; Comparative studies ; Dipolar magnetic fields ; Dipolarization ; Magnetic field data ; Magnetotails ; Statistical study ; Variable fluxes ; Magnetism
English Abstract: We present a statistical study of dipolarization fronts (DFs), using magnetic field data from MMS and Cluster, at radial distances below 12 RE and 20 RE, respectively. Assuming that the DFs have a semicircular cross section and are propelled by the magnetic tension force, we used multispacecraft observations to determine the DF velocities. About three quarters of the DFs propagate earthward and about one quarter tailward. Generally, MMS is in a more dipolar magnetic field region and observes larger-amplitude DFs than Cluster. The major findings obtained in this study are as follows: (1) At MMS ∼57 % of the DFs move faster than 150 km/s, while at Cluster only ∼35 %, indicating a variable flux transport rate inside the flow-braking region. (2) Larger DF velocities correspond to higher Bz values directly ahead of the DFs. We interpret this as a snow plow-like phenomenon, resulting from a higher magnetic flux pileup ahead of DFs with higher velocities. ©2016. The Authors.
Related Link: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84983273902&doi=10.1002%2f2016GL069520&partnerID=40&md5=c41d002a47757cd4f8cf4c92c24b2067
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Document Type: 期刊论文
Identifier: http://119.78.100.158/handle/2HF3EXSE/10684
Appears in Collections:科学计划与规划
气候变化与战略

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Affiliation: Space Research Institute, Austrian Academy of Sciences, Graz, Austria

Recommended Citation:
Schmid D.,Nakamura R.,Volwerk M.,et al. A comparative study of dipolarization fronts at MMS and Cluster[J]. Geophysical Research Letters,2016-01-01,43(12).
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