scholarly journals Equatorward moving auroral signatures of a flow burst observed prior to auroral onset

2009 ◽  
Vol 36 (24) ◽  
Author(s):  
L. Kepko ◽  
E. Spanswick ◽  
V. Angelopoulos ◽  
E. Donovan ◽  
J. McFadden ◽  
...  
Keyword(s):  
Flow Burst

scholarly journals Structure of the near-Earth plasma sheet during tailward flows

2008 ◽  
Vol 26 (3) ◽  
pp. 709-724 ◽  
Author(s):  
A. Runov ◽  
I. Voronkov ◽  
Y. Asano ◽  
W. Baumjohann ◽  
M. Fujimoto ◽  
...  
Keyword(s):  
Data Analysis ◽  
Plasma Flow ◽  
Plasma Sheet ◽  
Electron Flux ◽  
Neutral Sheet ◽  
Magnetic Filed ◽  
Current Filaments ◽  
Tailward Flow ◽  
Flow Burst

Abstract. A detailed analysis of successive tailward flow bursts in the near-Earth magnetotail (X~−19 RE) plasma sheet is performed on the basis of in-situ multi-point observations by the Cluster spacecraft on 15 September 2001. The tailward flows were detected during a northward IMF interval, 2.5 h after a substorm expansion. Each flow burst (Vx<300 km/s) was associated with local auroral activation. Enhancements of the parallel and anti-parallel ~1 keV electron flux were detected during the flows. The spacecraft configuration enables to monitor the neutral sheet (Bx≈0) and the level of Bx≈10–15 nT simultaneously, giving a possibility to distinguish between closed plasmoid-like structures and open NFTE-like surges. The data analysis shows NFTE-like structures and localized current filaments embedded into the tailward plasma flow. 3-D shapes of the structures were reconstructed using the four-point magnetic filed measurements and the particle data.

Electron‐Driven Dissipation in a Tailward Flow Burst

2019 ◽  
Vol 46 (11) ◽  
pp. 5698-5706 ◽  
Author(s):  
Z. Z. Chen ◽  
H. S. Fu ◽  
C. M. Liu ◽  
T. Y. Wang ◽  
R. E. Ergun ◽  
...  
Keyword(s):  
Tailward Flow ◽  
Flow Burst

Dual coenzyme activities of high-Km aldehyde dehydrogenase from rat liver mitochondria

1990 ◽  
Vol 68 (4) ◽  
pp. 751-757 ◽  
Author(s):  
C. Stan Tsai ◽  
D. J. Senior
Keyword(s):  
Steady State ◽  
Rat Liver ◽  
Aldehyde Dehydrogenase ◽  
Liver Mitochondria ◽  
Rat Liver Mitochondria ◽  
Binary Complex ◽  
Stopped Flow ◽  
Conformation Change ◽  
Rate Limiting ◽  
Flow Burst

Various kinetic approaches were carried out to investigate kinetic attributes for the dual coenzyme activities of mitochondrial aldehyde dehydrogenase from rat liver. The enzyme catalyses NAD+- and NADP+-dependent oxidations of ethanal by an ordered bi-bi mechanism with NAD(P)+ as the first reactant bound and NAD(P)H as the last product released. The two coenzymes presumably interact with the kinetically identical site. NAD+ forms the dynamic binary complex with the enzyme, while the enzyme-NAD(P)H complex formation is associated with conformation change(s). A stopped-flow burst of NAD(P)H formation, followed by a slower steady-state turnover, suggests that either the deacylation or the release of NAD(P)H is rate limiting. Although NADP+ is reduced by a faster burst rate, NAD+ is slightly favored as the coenzyme by virtue of its marginally faster turnover rate.Key words: aldehyde dehydrogenase, coenzyme preference.

Flow burst-induced Kelvin-Helmholtz waves in the terrestrial magnetotail

2007 ◽  
Vol 34 (10) ◽  
Author(s):  
M. Volwerk ◽  
K.-H. Glassmeier ◽  
R. Nakamura ◽  
T. Takada ◽  
W. Baumjohann ◽  
...  
Keyword(s):  
Flow Burst

scholarly journals A very large scale flow burst observed by the SuperDARN radars

1999 ◽  
Vol 104 (A10) ◽  
pp. 22469-22486 ◽  
Author(s):  
Nozomu Nishitani ◽  
Tadahiko Ogawa ◽  
Mike Pinnock ◽  
Mervyn P. Freeman ◽  
John R. Dudeney ◽  
...  
Keyword(s):  
Large Scale ◽  
Large Scale Flow ◽  
Flow Burst

scholarly journals Initial development of HF radar polar patch caused by azimuthal flow burst in the cusp

2010 ◽  
Vol 115 (A5) ◽  
pp. n/a-n/a ◽  
Author(s):  
S. Taguchi ◽  
K. Hosokawa ◽  
S. Suzuki ◽  
A. S. Yukimatu ◽  
N. Sato
Keyword(s):  
Hf Radar ◽  
Initial Development ◽  
Flow Burst

scholarly journals Motion of the dipolarization front during a flow burst event observed by Cluster

2002 ◽  
Vol 29 (20) ◽  
pp. 3-1-3-4 ◽  
Author(s):  
R. Nakamura ◽  
W. Baumjohann ◽  
B. Klecker ◽  
Y. Bogdanova ◽  
A. Balogh ◽  
...  
Keyword(s):  
Dipolarization Front ◽  
Burst Event ◽  
Flow Burst

scholarly journals Two-Dimensional Structure of Flow Channels and Associated Upward Field-Aligned Currents: Model and Observations

2021 ◽  
Vol 8 ◽  
Author(s):  
Larry. R. Lyons ◽  
Yukitoshi Nishimura ◽  
Chih-Ping Wang ◽  
Jiang Liu ◽  
William. A. Bristow
Keyword(s):  
Plasma Sheet ◽  
Auroral Oval ◽  
Flow Channel ◽  
Dimensional Structure ◽  
Convection Cell ◽  
Two Dimensional ◽  
Flow Channels ◽  
Structure Of Flow ◽  
Low Entropy ◽  
Flow Burst

Flow bursts are a major component of transport within the plasma sheet and auroral oval (where they are referred to as flow channels), and lead to a variety of geomagnetic disturbances as they approach the inner plasma sheet (equatorward portion of the auroral oval). However, their two-dimensional structure as they approach the inner plasma sheet has received only limited attention. We have examined this structure using both the Rice Convection Model (RCM) and ground-based radar and all sky imager observations. As a result of the energy dependent magnetic drift, the low entropy plasma of a flow burst spreads azimuthally within the inner plasma sheet yielding specific predictions of subauroral polarization stream (SAPS) and dawnside auroral polarization stream (DAPS) enhancements that are related to the field-aligned currents associated with the flow channel. Flow channels approximately centered between the dawn and dusk large-scale convection cells are predicted to give significant enhancements of both SAPS and DAPS, whereas flow channel further toward the dusk (dawn) convection cell show a far more significant enhancement of SAPS (DAPS) than for DAPS (SAPS). We present observations for cases having good coverage of flow channels as they approach the equatorward portion of the auroral oval and find very good qualitative agreement with the above RCM predictions, including the predicted differences with respect to flow burst location. Despite there being an infinite variety of flow channels’ plasma parameters and of background plasma sheet and auroral oval conditions, the observations show the general trends predicted by the RCM simulations with the idealized parameters. This supports that RCM predictions of the azimuthal spread of a low-entropy plasma sheet plasma and its associated FAC and flow responses give a realistic physical description of the structure of plasma sheet flow bursts (auroral oval flow channels) as they reach the inner plasma sheet (near the equatorward edge of the auroral oval).

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