Correlation between the solar wind dynamic and static pressures

Details Correlation between the solar wind dynamic and static pressures Correlation between the solar wind dynamic and static pressures

Apr 2000

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2000jgr...105.7583k&link_type=abstract

Journal of Geophysical Research, Volume 105, Issue A4, p. 7583-7590

Physics

2

Interplanetary Physics: Solar Cycle Variations, Interplanetary Physics: Solar Wind Plasma, Magnetospheric Physics: Solar Wind/Magnetosphere Interactions

Scientific paper

In this paper we examine the correlation between the solar wind dynamic and static pressures, as a function of solar cycle phase, by using the hourly data of solar wind parameters at the National Space Science Data Center OMNIWeb. The correlation is important in terms of the solar wind control of the diameter of the distant magnetotail and other situations in which solar wind dynamic and static pressures may separately play a role. We find that the correlation coefficient between the two pressures is constantly high (almost always larger than 0.7) and shows little dependence on the solar cycle. Thus, even though the distant tail shape may be controlled by the static pressure of the solar wind, the shape should still be well correlated with the solar wind dynamic pressure, through the correlation between the solar wind dynamic and static pressures.

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