scholarly journals Reduced proton and alpha particle precipitations at Mars during solar wind pressure pulses: Mars Express results

2013 ◽  
Vol 118 (6) ◽  
pp. 3421-3429 ◽  
Author(s):  
C. Diéval ◽  
G. Stenberg ◽  
H. Nilsson ◽  
N. J. T. Edberg ◽  
S. Barabash
Keyword(s):  
Solar Wind ◽  
Alpha Particle ◽  
Wind Pressure ◽  
Mars Express ◽  
Pressure Pulses ◽  
Solar Wind Pressure

scholarly journals Ionospheric signatures of plasma injections in the cusp triggered by solar wind pressure pulses

2005 ◽  
Vol 110 (A8) ◽  
Author(s):  
Jean-Claude Cerisier ◽  
Aurélie Marchaudon ◽  
Jean-Michel Bosqued ◽  
Kathryn McWilliams ◽  
Harald U. Frey ◽  
...  
Keyword(s):  
Solar Wind ◽  
Wind Pressure ◽  
Pressure Pulses ◽  
Solar Wind Pressure

scholarly journals Propagation and evolution of electric fields associated with solar wind pressure pulses based on spacecraft and ground-based observations

2017 ◽  
Vol 122 (8) ◽  
pp. 8446-8461 ◽  
Author(s):  
N. Takahashi ◽  
Y. Kasaba ◽  
Y. Nishimura ◽  
A. Shinbori ◽  
T. Kikuchi ◽  
...  
Keyword(s):  
Solar Wind ◽  
Electric Fields ◽  
Wind Pressure ◽  
Pressure Pulses ◽  
Solar Wind Pressure

scholarly journals Pumping out the atmosphere of Mars through solar wind pressure pulses

2010 ◽  
Vol 37 (3) ◽  
pp. n/a-n/a ◽  
Author(s):  
N. J. T. Edberg ◽  
H. Nilsson ◽  
A. O. Williams ◽  
M. Lester ◽  
S. E. Milan ◽  
...  
Keyword(s):  
Solar Wind ◽  
Wind Pressure ◽  
Pressure Pulses ◽  
Solar Wind Pressure

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 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 From the Sun to the Earth: impact of the 27-28 May 2003 solar events on the magnetosphere, ionosphere and thermosphere

2006 ◽  
Vol 24 (1) ◽  
pp. 129-151 ◽  
Author(s):  
C. Hanuise ◽  
J. C. Cerisier ◽  
F. Auchère ◽  
K. Bocchialini ◽  
S. Bruinsma ◽  
...  
Keyword(s):  
Solar Wind ◽  
High Latitude ◽  
Current System ◽  
Auroral Oval ◽  
Wind Pressure ◽  
Electron Content ◽  
Interplanetary Shocks ◽  
Total Electron ◽  
Pressure Pulses ◽  
Solar Wind Pressure

Abstract. During the last week of May 2003, the solar active region AR 10365 produced a large number of flares, several of which were accompanied by Coronal Mass Ejections (CME). Specifically on 27 and 28 May three halo CMEs were observed which had a significant impact on geospace. On 29 May, upon their arrival at the L1 point, in front of the Earth's magnetosphere, two interplanetary shocks and two additional solar wind pressure pulses were recorded by the ACE spacecraft. The interplanetary magnetic field data showed the clear signature of a magnetic cloud passing ACE. In the wake of the successive increases in solar wind pressure, the magnetosphere became strongly compressed and the sub-solar magnetopause moved inside five Earth radii. At low altitudes the increased energy input to the magnetosphere was responsible for a substantial enhancement of Region-1 field-aligned currents. The ionospheric Hall currents also intensified and the entire high-latitude current system moved equatorward by about 10°. Several substorms occurred during this period, some of them - but not all - apparently triggered by the solar wind pressure pulses. The storm's most notable consequences on geospace, including space weather effects, were (1) the expansion of the auroral oval, and aurorae seen at mid latitudes, (2) the significant modification of the total electron content in the sunlight high-latitude ionosphere, (3) the perturbation of radio-wave propagation manifested by HF blackouts and increased GPS signal scintillation, and (4) the heating of the thermosphere, causing increased satellite drag. We discuss the reasons why the May 2003 storm is less intense than the October-November 2003 storms, although several indicators reach similar intensities.

scholarly journals Evolution of the current system during solar wind pressure pulses based on aurora and magnetometer observations

2016 ◽  
Vol 68 (1) ◽  
Author(s):  
Yukitoshi Nishimura ◽  
Takashi Kikuchi ◽  
Yusuke Ebihara ◽  
Akimasa Yoshikawa ◽  
Shun Imajo ◽  
...  
Keyword(s):  
Solar Wind ◽  
Current System ◽  
Wind Pressure ◽  
Pressure Pulses ◽  
Solar Wind Pressure
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