scholarly journals Dynamics of global scale electron and proton precipitation induced by a solar wind pressure pulse

2003 ◽  
Vol 30 (20) ◽  
Author(s):  
M. Meurant ◽  
J.‐C. Gérard ◽  
B. Hubert ◽  
V. Coumans ◽  
C. Blockx ◽  
...  
Keyword(s):  
Solar Wind ◽  
Pressure Pulse ◽  
Global Scale ◽  
Wind Pressure ◽  
Solar Wind Pressure ◽  
Proton Precipitation

scholarly journals Solar wind and substorm excitation of the wavy current sheet

2009 ◽  
Vol 27 (6) ◽  
pp. 2457-2474 ◽  
Author(s):  
C. Forsyth ◽  
M. Lester ◽  
R. C. Fear ◽  
E. Lucek ◽  
I. Dandouras ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Solar Wind ◽  
Current Sheet ◽  
Pressure Pulse ◽  
Wind Pressure ◽  
Expansion Velocity ◽  
Solar Wind Pressure ◽  
Wave Models ◽  
Best Fit ◽  
The Magnetic Field

Abstract. Following a solar wind pressure pulse on 3 August 2001, GOES 8, GOES 10, Cluster and Polar observed dipolarizations of the magnetic field, accompanied by an eastward expansion of the aurora observed by IMAGE, indicating the occurrence of two substorms. Prior to the first substorm, the motion of the plasma sheet with respect to Cluster was in the ZGSM direction. Observations following the substorms show the occurrence of current sheet waves moving predominantly in the −YGSM direction. Following the second substorm, the current sheet waves caused multiple current sheet crossings of the Cluster spacecraft, previously studied by Zhang et al. (2002). We further this study to show that the velocity of the current sheet waves was similar to the expansion velocity of the substorm aurora and the expansion of the dipolarization regions in the magnetotail. Furthermore, we compare these results with the current sheet wave models of Golovchanskaya and Maltsev (2005) and Erkaev et al. (2008). We find that the Erkaev et al. (2008) model gives the best fit to the observations.

scholarly journals Rosetta and Mars Express observations of the influence of high solar wind pressure on the Martian plasma environment

2009 ◽  
Vol 27 (12) ◽  
pp. 4533-4545 ◽  
Author(s):  
N. J. T. Edberg ◽  
U. Auster ◽  
S. Barabash ◽  
A. Bößwetter ◽  
D. A. Brain ◽  
...  
Keyword(s):  
Magnetic Field ◽  
High Pressure ◽  
Solar Wind ◽  
Pressure Pulse ◽  
Wind Pressure ◽  
Data Set ◽  
Mars Express ◽  
Boundary Crossings ◽  
Plasma Environment ◽  
Solar Wind Pressure

Abstract. We report on new simultaneous in-situ observations at Mars from Rosetta and Mars Express (MEX) on how the Martian plasma environment is affected by high pressure solar wind. A significant sharp increase in solar wind density, magnetic field strength and turbulence followed by a gradual increase in solar wind velocity is observed during ~24 h in the combined data set from both spacecraft after Rosetta's closest approach to Mars on 25 February 2007. The bow shock and magnetic pileup boundary are coincidently observed by MEX to become asymmetric in their shapes. The fortunate orbit of MEX at this time allows a study of the inbound boundary crossings on one side of the planet and the outbound crossings on almost the opposite side, both very close to the terminator plane. The solar wind and interplanetary magnetic field (IMF) downstream of Mars are monitored through simultaneous measurements provided by Rosetta. Possible explanations for the asymmetries are discussed, such as crustal magnetic fields and IMF direction. In the same interval, during the high solar wind pressure pulse, MEX observations show an increased amount of escaping planetary ions from the polar region of Mars. We link the high pressure solar wind with the observed simultaneous ion outflow and discuss how the pressure pulse could also be associated with the observed boundary shape asymmetry.

scholarly journals Solar wind pressure pulse-driven magnetospheric vortices and their global consequences

2014 ◽  
Vol 119 (6) ◽  
pp. 4274-4280 ◽  
Author(s):  
Q. Q. Shi ◽  
M.D. Hartinger ◽  
V. Angelopoulos ◽  
A.M. Tian ◽  
S.Y. Fu ◽  
...  
Keyword(s):  
Solar Wind ◽  
Pressure Pulse ◽  
Wind Pressure ◽  
Solar Wind Pressure

scholarly journals Localized ion outflow in response to a solar wind pressure pulse

2002 ◽  
Vol 107 (A8) ◽  
pp. SMP 26-1-SMP 26-9 ◽  
Author(s):  
S. A. Fuselier ◽  
H. L. Collin ◽  
A. G. Ghielmetti ◽  
E. S. Claflin ◽  
T. E. Moore ◽  
...  
Keyword(s):  
Solar Wind ◽  
Pressure Pulse ◽  
Wind Pressure ◽  
Ion Outflow ◽  
Solar Wind Pressure

scholarly journals Distinct solar wind pressure pulses producing convection twin-vortex systems in the ionosphere

2004 ◽  
Vol 22 (6) ◽  
pp. 2201-2211 ◽  
Author(s):  
D. V. Sarafopoulos
Keyword(s):  
Solar Wind ◽  
Global Scale ◽  
Observational Evidence ◽  
Wind Pressure ◽  
Ionospheric Currents ◽  
Single Vortex ◽  
Pressure Pulses ◽  
Solar Wind Pressure ◽  
Vortex Systems

Abstract. We provide conclusive observational evidence demonstrating that a solar wind pressure pulse produces a twin-vortex system of ionospheric currents, while a stepwise pressure increase/decrease creates a single vortex structure, at high-latitude ground magnetograms. Multi-satellite (Wind, Geotail, Interball, IMP 8 and GOES 8) and multi-instrument observations of plasma and magnetic field confirm with in situ measurements that solar wind inherent pressure pulses and stepwise variations strike on the Earth's magnetosphere in a global scale. The ground signatures are scrutinized in detail and the twin- or single-vortex current systems are studied using the IMAGE array stations. One more finding of this work is that a single vortex can produce monopolar and bipolar features, depending on the station position relative to the overhead travelling convection vortex (TCV). All of the above observational evidence confirms Glassmeier's (1992) prediction model that associates solar wind's steep changes of pressure with ionospheric TCVs.

scholarly journals Noon ionospheric signatures of a sudden commencement following a solar wind pressure pulse

2002 ◽  
Vol 20 (5) ◽  
pp. 639-645 ◽  
Author(s):  
A. Vontrat-Reberac ◽  
J.-C. Cerisier ◽  
N. Sato ◽  
M. Lester
Keyword(s):  
Solar Wind ◽  
Electric Fields ◽  
Pressure Pulse ◽  
Sudden Commencement ◽  
Wind Pressure ◽  
Plasma Convection ◽  
Ionosphere Plasma ◽  
Solar Wind Pressure ◽  
Field Lines ◽  
Electric Fields And Currents

Abstract. Using experimental data from the Cutlass Super-DARN HF radars and from a subset of ground magnetometers of the IMAGE Scandinavian chain, the response of the ionosphere in the noon sector to a solar wind pressure increase is studied. The emphasis is on the signature of the convection vortices and of the Hall currents that are associated with the pair of opposite parallel currents flowing along the morning and afternoon high-latitude magnetic field lines. We show that the sudden commencement is characterised by an equatorward convection, immediately followed (within less than 3 min) by a strong poleward plasma motion. These results are shown to agree qualitatively with the global model of sudden commencement of Araki (1994).Key words. Ionosphere (plasma convection; electric fields and currents) – Magnetospheric physics (solar wind-magnetosphere interactions)

Local amplification of auroral electrojet as a response to a sharp solar wind pressure pulse

2005 ◽  
Vol 53 (1-3) ◽  
pp. 265-274 ◽  
Author(s):  
V.A. Parkhomov ◽  
M.O. Riazantseva ◽  
G.N. Zastenker
Keyword(s):  
Solar Wind ◽  
Pressure Pulse ◽  
Auroral Electrojet ◽  
Wind Pressure ◽  
Solar Wind Pressure

Global auroral response to a solar wind pressure pulse

2000 ◽  
Vol 25 (7-8) ◽  
pp. 1377-1385 ◽  
Author(s):  
M Brittnacher ◽  
M Wilber ◽  
M Fillingim ◽  
D Chua ◽  
G Parks ◽  
...  
Keyword(s):  
Solar Wind ◽  
Pressure Pulse ◽  
Wind Pressure ◽  
Solar Wind Pressure
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