 |
| Titel |
A statistical study of the distribution and size of dipolarization fronts observed by Cluster |
| VerfasserIn |
Sudong Xiao, Tielong Zhang, Yasong Ge, Rumi Nakamura, Wolfgang Baumjohann |
| Konferenz |
EGU General Assembly 2015
|
| Medientyp |
Artikel
|
| Sprache |
Englisch
|
| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 17 (2015) |
| Datensatznummer |
250103467
|
| Publikation (Nr.) |
 EGU/EGU2015-2878.pdf |
|
|
|
|
|
| Zusammenfassung |
| Magnetic reconnection in the Earth’s magnetotail accelerates fast plasma jets. The front edge
of the earthward propagating jet is a type of discontinuity, called the dipolarization front
(DF). The DF is characterized by an abrupt increase in the Z-component of the magnetic
field mainly. The spatial distribution of DFs is investigated based on the data of
four satellites of Cluster from 2001 to 2009. 920 earthward propagating DFs are
found in this study. We found the maximum occurrence is at ZGSM ~ 0 and r ~ 16
RE with one event occurring about every 2 hours, where r is the distance to the
centre of the Earth in the XYGSM plane. We investigate the spatial distribution of
dipolarization fronts simultaneously observed by different numbers of satellites.
The results show that the DFs near the earth would decrease with the number of
satellites increasing. That means the spatial scale size of DF might reduce with
earth-ward propagating. Most of the DFs are observed by only one satellite. It can be
deduced that the majority of the DFs have a small extension, which is less than 1 RE. |
|
|
|
|
|
|