Solar Wind Sources and Their Variations Over the Solar Cycle
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.
- Publication:
-
Space Science Reviews
- Pub Date:
- June 2006
- DOI:
- 10.1007/s11214-006-9099-5
- Bibcode:
- 2006SSRv..124...51S
- Keywords:
-
- corona;
- solar wind;
- high-speed streams;
- streamers;
- differential rotation;
- coronal mass ejections (CMEs);
- solar activity cycle