Solar Wind Sources and Their Variations Over the Solar Cycle |
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Authors: | R Schwenn |
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Institution: | (1) Max-Planck-Institut für Sonnensystemforschung, Max-Planck-Str. 2, 37191 Katlenburg-Lindau, Germany |
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Abstract: | In this paper I will briefly summarize the present status of our knowledge on the four different sorts of solar wind, their
sources and their short- and long-term variations. First: the fast solar wind in high-speed streams that emerges from coronal
hole regions. Second: the slow solar wind emerging from the non-active Sun near the global heliospheric current sheet above
helmet streamers and underlying active regions. Third: the slow solar wind filling most of the heliosphere during high solar
activity, emerging above active regions in a highly turbulent state, and fourth: the plasma expelled from the Sun during coronal
mass ejections. The coronal sources of these different flows vary dramatically with the solar activity cycle. |
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Keywords: | corona solar wind high-speed streams streamers differential rotation coronal mass ejections (CMEs) solar activity cycle |
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