scholarly journals Plasma sheet thickness during a bursty bulk flow reversal

2010 ◽  
Vol 115 (A5) ◽  
pp. n/a-n/a ◽  
Author(s):  
E. V. Panov ◽  
R. Nakamura ◽  
W. Baumjohann ◽  
V. A. Sergeev ◽  
A. A. Petrukovich ◽  
...  
Keyword(s):  
Plasma Sheet ◽  
Sheet Thickness ◽  
Flow Reversal ◽  
Bulk Flow ◽  
Bursty Bulk Flow

scholarly journals Multi-instrument observations of the ionospheric counterpart of a bursty bulk flow in the near-Earth plasma sheet

2004 ◽  
Vol 22 (4) ◽  
pp. 1061-1075 ◽  
Author(s):  
A. Grocott ◽  
T. K. Yeoman ◽  
R. Nakamura ◽  
S. W. H. Cowley ◽  
H. U. Frey ◽  
...  
Keyword(s):  
Plasma Sheet ◽  
Large Scale ◽  
Current System ◽  
Global Scale ◽  
Bulk Flow ◽  
Optical Data ◽  
Small Scale ◽  
Plasma Convection ◽  
Bursty Bulk Flow ◽  
Central Plasma

Abstract. On 07 September 2001 the Cluster spacecraft observed a "bursty bulk flow" event in the near-Earth central plasma sheet. This paper presents a detailed study of the coincident ground-based observations and attempts to place them within a simple physical framework. The event in question occurs at ~22:30 UT, some 10min after a southward turning of the IMF. IMAGE and SAMNET magnetometer measurements of the ground magnetic field reveal perturbations of a few tens of nT and small amplitude Pi2 pulsations. CUTLASS radar observations of ionospheric plasma convection show enhanced flows out of the polar cap near midnight, accompanied by an elevated transpolar voltage. Optical data from the IMAGE satellite also show that there is a transient, localised ~1 kR brightening in the UV aurora. These observations are consistent with the earthward transport of plasma in the tail, but also indicate the absence of a typical "large-scale" substorm current wedge. An analysis of the field-aligned current system implied by the radar measurements does suggest the existence of a small-scale current "wedgelet", but one which lacks the global scale and high conductivities observed during substorm expansions. Key words. Ionosphere (auroral ionosphere; ionospheremagnetosphere interactions; plasma convection)

Bursty Bulk Flow Driven Turbulence in the Earth’s Plasma Sheet

2006 ◽  
Vol 122 (1-4) ◽  
pp. 301-311 ◽  
Author(s):  
Z. Vörös ◽  
W. Baumjohann ◽  
R. Nakamura ◽  
M. Volwerk ◽  
A. Runov
Keyword(s):  
Plasma Sheet ◽  
Bulk Flow ◽  
Bursty Bulk Flow

scholarly journals Large-amplitude electric fields associated with bursty bulk flow braking in the Earth's plasma sheet

2015 ◽  
Vol 120 (3) ◽  
pp. 1832-1844 ◽  
Author(s):  
R. E. Ergun ◽  
K. A. Goodrich ◽  
J. E. Stawarz ◽  
L. Andersson ◽  
V. Angelopoulos
Keyword(s):  
Electric Fields ◽  
Plasma Sheet ◽  
Large Amplitude ◽  
Bulk Flow ◽  
Bursty Bulk Flow

scholarly journals Compressible turbulence with slow-mode waves observed in the bursty bulk flow of plasma sheet

2016 ◽  
Vol 43 (5) ◽  
pp. 1854-1861 ◽  
Author(s):  
Tieyan Wang ◽  
Jinbin Cao ◽  
Huishan Fu ◽  
Xuejie Meng ◽  
M. Dunlop
Keyword(s):  
Plasma Sheet ◽  
Bulk Flow ◽  
Compressible Turbulence ◽  
Slow Mode ◽  
Bursty Bulk Flow

scholarly journals Spectral scaling in the turbulent Earth's plasma sheet revisited

2007 ◽  
Vol 14 (4) ◽  
pp. 535-541 ◽  
Author(s):  
Z. Vörös ◽  
W. Baumjohann ◽  
R. Nakamura ◽  
A. Runov ◽  
M. Volwerk ◽  
...  
Keyword(s):  
Magnetic Reconnection ◽  
Plasma Sheet ◽  
Large Scale ◽  
Spatial Scales ◽  
Inertial Range ◽  
Bulk Flow ◽  
Magnetic Fluctuations ◽  
Magnetohydrodynamic Turbulence ◽  
Multi Scale ◽  
Bursty Bulk Flow

Abstract. Bursty bulk flow associated magnetic fluctuations exhibit at least three spectral scaling ranges in the Earth's plasma sheet. Two of the three scaling ranges can be associated with multi-scale magnetohydrodynamic turbulence between the spatial scales from ~100 km to several RE (RE is the Earth's radius). These scales include the inertial range and below ~0.5 RE a steepened scaling range, theoretically not fully understood yet. It is shown that, in the near-Earth plasma sheet, the inertial range can be robustly identified only if multi-scale quasi stationary (MSQS) data intervals are selected. Multiple bursty flow associated magnetic fluctuations, however, exhibit 1/f type scaling indicating that large-scale fluctuations are controlled by multiple uncorrelated driving sources of the bulk flows (e.g. magnetic reconnection, instabilities).

TC-1 observation of ion high-speed flow reversal in the near-Earth plasma sheet during substorm

2008 ◽  
Vol 51 (10) ◽  
pp. 1721-1730 ◽  
Author(s):  
SuPing Duan ◽  
ZhenXing Liu ◽  
JinBin Cao ◽  
Li Lu ◽  
H. Rème ◽  
...  
Keyword(s):  
Plasma Sheet ◽  
High Speed ◽  
Flow Reversal ◽  
High Speed Flow ◽  
Speed Flow

Multipoint Analysis of the Temporal Scale of Bursty Bulk Flow Events during the Quiet Time of Magnetotail

2005 ◽  
Vol 48 (2) ◽  
pp. 277-283 ◽  
Author(s):  
Yu-Duan MA ◽  
Jin-Bin CAO ◽  
Guo-Cheng ZHOU ◽  
Zhen-Xin LIU ◽  
H. Reme ◽  
...  
Keyword(s):  
Temporal Scale ◽  
Bulk Flow ◽  
Quiet Time ◽  
Multipoint Analysis ◽  
Bursty Bulk Flow

scholarly journals Electron-scale Vertical Current Sheets in a Bursty Bulk Flow in the Terrestrial Magnetotail

2019 ◽  
Vol 872 (2) ◽  
pp. L26 ◽  
Author(s):  
M. Zhou ◽  
J. Huang ◽  
H. Y. Man ◽  
X. H. Deng ◽  
Z. H. Zhong ◽  
...  
Keyword(s):  
Bulk Flow ◽  
Current Sheets ◽  
Bursty Bulk Flow

scholarly journals Correlation between ground-based observations of substorm signatures and magnetotail dynamics

2005 ◽  
Vol 23 (3) ◽  
pp. 997-1011 ◽  
Author(s):  
E. Borälv ◽  
H. J. Opgenoorth ◽  
K. Kauristie ◽  
M. Lester ◽  
J.-M. Bosqued ◽  
...  
Keyword(s):  
Solar Wind ◽  
Event Study ◽  
Plasma Sheet ◽  
Sheet Thickness ◽  
Substorm Onset ◽  
Boundary Motion ◽  
Thickness Variations ◽  
Magnetotail Dynamics

Abstract. We present a substorm event study using the four Cluster spacecraft in combination with ground-based instruments, in order to perform simultaneous observations in the ionosphere and magnetotail. We show good correlation between substorm signatures on the ground and in the magnetotail, even though data from the northern-ground and southern-tail hemispheres are compared. During this event ground-based magnetometers show a substorm onset over Scandinavia in the pre-midnight sector. Within 1.5h the onset and three intensifications are apparent in the magnetograms. For all the substorm signatures seen on the ground, corresponding plasma sheet boundary motion is visible at Cluster, located at a downtail distance of 18.5 RE. As a result of the substorm onset and intensifications, Cluster moves in and out between the southern plasma sheet and lobe. Due to the lack of an apparent solar wind driver and the good correlation between substorm signatures on the ground, we conclude the substorm itself is the driver for these plasma sheet dynamics. We show that in the scales of Cluster inter-spacecraft distances (~0.5 RE) the inferred plasma sheet motion is often directed in both Ygsm- and Zgsm-directions, and discuss this finding in the context of previous studies of tail flapping and plasma sheet thickness variations.

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