Motion of the dipolarization front during a flow burst event observed by Cluster
Rumi Nakamura,Wolfgang Baumjohann,Berndt Klecker,Y. V. Bogdanova,André Balogh,H. Rème,Jean-Michel Bosqued,Iannis Dandouras,Jean-André Sauvaud,Karl-Heinz Glassmeier,L. M. Kistler,C. G. Mouikis,T. L. Zhang,H. U. Eichelberger,Andrei Runov +14 more
TLDR
In this paper, a flow burst was associated with a clear dipolarization ahead of the high-speed part of the predominantly Earthward directed flow, and the authors found that a ∼2000 km thick dipolarisation front moves Earthward and dawnward with a speed of ∼77 km/s.Abstract:
[1] In this paper we study a flow burst event which took place during enhanced geomagnetic activity on July 22, 2001, when Cluster was located in the postmidnight magnetotail. The flow burst was associated with a clear dipolarization ahead of the high-speed part of the predominantly Earthward directed flow. Based on the analysis of the four spacecraft data, we found that a ∼2000 km thick dipolarization front moves Earthward and dawnward with a speed of ∼77 km/s. The plasma before this front is deflected, consistent with the plasma ahead of a localized plasma bubble centered at midnight side being pushed aside by the moving obstacle. The main body of the high-speed flow is directed mainly parallel to the dipolarization front. These observations indicate that the evolution of the dipolarization front across the tail is directly coupled with the fast flow.read more
Citations
More filters
Journal ArticleDOI
THEMIS observations of an earthward-propagating dipolarization front
Andrei Runov,Vassilis Angelopoulos,M. I. Sitnov,V. A. Sergeev,John W. Bonnell,James P. McFadden,Davin Larson,Karl-Heinz Glassmeier,Uli Auster +8 more
TL;DR: In this paper, a dipolarization front was detected in the central plasma sheet sequentially at X = -20.1 R E (THEMIS P1 probe), at x = -16.7 R E(P2 probe), and at X= -11.0 RE (P3/P4 pair), suggesting its earthward propagation as a coherent structure over a distance more than 10 R E at a velocity of 300 km/s.
Journal ArticleDOI
A THEMIS multicase study of dipolarization fronts in the magnetotail plasma sheet
Andrei Runov,Vassilis Angelopoulos,Xu-Zhi Zhou,Xiao-Jia Zhang,S. Li,Ferdinand Plaschke,John W. Bonnell +6 more
TL;DR: In this paper, a superposed epoch analysis of dipolarization front crossings and their characteristic gradient scales was performed, revealing a rapid 50% decrease in plasma density and ion pressure, a factor of 2-3 increase in high-energy (30-200 keV) electron flux and electron temperature, and transient enhancements of ∼5 mV/m in duskward and earthward electric field components.
Journal ArticleDOI
Spatial scale of high‐speed flows in the plasma sheet observed by Cluster
Rumi Nakamura,Wolfgang Baumjohann,C. G. Mouikis,L. M. Kistler,Andrei Runov,Martin Volwerk,Martin Volwerk,Y. Asano,Zoltán Vörös,T. L. Zhang,Berndt Klecker,Henri Rème,André Balogh +12 more
TL;DR: In this paper, the spatial gradient of high-speed flows in the midtail plasma sheet is determined using multipoint observations from the Cluster spacecraft along the "dawn-dusk" direction (perpendicular to the main flow and in the plane of the tail current sheet) and along the north-south direction.
Journal ArticleDOI
On the current sheets surrounding dipolarizing flux bundles in the magnetotail: The case for wedgelets
TL;DR: The authors studied the three-dimensional structure of the dipolarization front current sheet (DFCS), which demarcates the magnetic boundary of a dipolarizing flux bundle (DFB) in Earth's magnetotail.
Journal ArticleDOI
Dipolarization fronts as a signature of transient reconnection in the magnetotail
TL;DR: In this paper, it is shown that bipolarization fronts (DFs) form when the force balance is already restored in the system and justify their interpretation as a nonlinear stage of the tearing instability developing in two magnetotail-like structures on the left and on the right of the initial central X-line.
References
More filters
Journal ArticleDOI
The Cluster Magnetic Field Investigation: overview of in-flight performance and initial results
A. Balogh,Chris Carr,Mario H. Acuña,M. W. Dunlop,T. Beek,Patrick Brown,Karl-Heinz Fornacon,E. Georgescu,Karl-Heinz Glassmeier,J. Harris,G. Musmann,T. Oddy,Konrad Schwingenschuh +12 more
TL;DR: In this paper, the authors present an overview of the instrumentation used to measure the magnetic field on the four Cluster spacecraft and an overview the performance of the operational modes used in flight.
Journal ArticleDOI
First multispacecraft ion measurements in and near the Earth's magnetosphere with the identical Cluster ion spectrometry (CIS) experiment
H. Rème,C. Aoustin,J. M. Bosqued,Iannis Dandouras,Benoit Lavraud,Jean-André Sauvaud,A. Barthe,J. Bouyssou,T. Camus,O. Coeur-Joly,A. Cros,J. Cuvilo,F. Ducay,Y. Garbarowitz,J. L. Medale,Emmanuel Penou,H. Perrier,D. Romefort,Jean-Noël Rouzaud,Claire Vallat,D. Alcaydé,C. Jacquey,Christian Mazelle,Claude d’Uston,Eberhard Möbius,L. M. Kistler,K. Crocker,M. Granoff,C. G. Mouikis,M. Popecki,M. Vosbury,Berndt Klecker,D. Hovestadt,Harald Kucharek,E. Kuenneth,G. Paschmann,Manfred Scholer,N. Sckopke,E. Seidenschwang,C. W. Carlson,D. W. Curtis,C. Ingraham,Robert P. Lin,James P. McFadden,George K. Parks,Tai Phan,Vittorio Formisano,Ermanno Amata,M. B. Bavassano-Cattaneo,P. Baldetti,Roberto Bruno,G. Chionchio,A. M. Di Lellis,Maria Federica Marcucci,G. Pallocchia,A. Korth,P. W. Daly,B. Graeve,H. Rosenbauer,Vytenis M. Vasyliunas,Matthew D. McCarthy,M. Wilber,Lars Eliasson,Rickard Lundin,S. Olsen,E. G. Shelley,Stephen A. Fuselier,A. G. Ghielmetti,W. Lennartsson,C. P. Escoubet,Hans Balsiger,Reiner Friedel,J.-B. Cao,R. A. Kovrazhkin,I. Papamastorakis,R. Pellat,J. D. Scudder,Bengt U. Ö. Sonnerup +77 more
TL;DR: The Cluster Ion Spectrometry (CIS) experiment as discussed by the authors measured the full, three-dimensional ion distribution of the major magnetospheric ions (H+, He+, He++, and O+) from the thermal energies to about 40 keV/e.
Journal ArticleDOI
Characteristics of high‐speed ion flows in the plasma sheet
TL;DR: In this paper, the authors analyzed more than 270,000 ion moments and magnetic field measurements with respect to the occurrence rates and typical characteristics of high-speed ion flows with velocities in excess of 400 km/s.
Journal ArticleDOI
Statistical characteristics of bursty bulk flow events
Vassilis Angelopoulos,Charles F. Kennel,Ferdinand V. Coroniti,R. Pellat,Margaret G. Kivelson,Raymond J. Walker,Christopher T. Russell,Wolfgang Baumjohann,W. C. Feldman,J. T. Gosling +9 more
TL;DR: In this paper, the statistical properties of bursty bulk flow events (BBFs) in the inner plasma sheet (IPS) were analyzed using data from active magnetospheric particle tracer Explorer/Ion Release Module (AMPTE/IRM) and International Sun-Earth Explorer 2 (ISEE 2) satellites.
Journal ArticleDOI
Average plasma properties in the central plasma sheet
TL;DR: In this article, a statistical survey on the behavior of ion and electron moments in the central plasma sheet was conducted using four months of tail data obtained by the three-dimensional plasma instrument on board the AMPTE/IRM satellite.