the effect of upstream turbulence and its anisotropy on the efficiency of solar wind – magnetosphere coupling

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ID: 152397
2008
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Abstract
The importance of space weather and its forecasting is growing as interest in studying geoeffective processes in the Sun – solar wind – magnetosphere – ionosphere coupled system is increasing. This paper introduces the proper selection criteria for solar wind magnetic turbulence events during duskward electric field and southward <i>B<sub>z</sub></i> driven geomagnetic storms. Two measures for the strength of solar wind fluctuations were investigated: the standard deviations of magnetic field components and a proxy for the so-called Shebalin anisotropy angles. These measures were compared to the strength of geomagnetic storms obtained from a SYM-H index time series. We found a weak correlation between standard deviation of interplanetary magnetic field GSM component <i>B<sub>z</sub></i> and SYM-H index, and a strong correlation between Shebalin anisotropy angle and the SYM-H index, which can be the result of an increase of probability of magnetic reconnection in fluctuating magnetic fields.
Reference Key
jankoviov2008nonlinearthe Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors ;D. Jankovičová;Z. Vörös;J. Šimkanin
Journal BMC research notes
Year 2008
DOI
DOI not found
URL
http://www.nonlin-processes-geophys.net/15/523/2008/npg-15-523-2008.pdf
Keywords
cosmic physics sciencephysicsgeophysics

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