globalchange  > 气候减缓与适应
DOI: 10.1002/2017JA024586
Scopus记录号: 2-s2.0-85044530084
论文题名:
The Dependence of the Peak Velocity of High-Speed Solar Wind Streams as Measured in the Ecliptic by ACE and the STEREO satellites on the Area and Co-latitude of Their Solar Source Coronal Holes
作者: Hofmeister S.J.; Veronig A.; Temmer M.; Vennerstrom S.; Heber B.; Vršnak B.
刊名: Journal of Geophysical Research: Space Physics
ISSN: 21699380
出版年: 2018
卷: 123, 期:3
起始页码: 1738
结束页码: 1753
语种: 英语
英文关键词: area ; coronal hole ; geomagnetic storm ; latitude ; propagation ; solar wind high-speed stream
英文摘要: We study the properties of 115 coronal holes in the time range from August 2010 to March 2017, the peak velocities of the corresponding high-speed streams as measured in the ecliptic at 1 AU, and the corresponding changes of the Kp index as marker of their geoeffectiveness. We find that the peak velocities of high-speed streams depend strongly on both the areas and the co-latitudes of their solar source coronal holes with regard to the heliospheric latitude of the satellites. Therefore, the co-latitude of their source coronal hole is an important parameter for the prediction of the high-speed stream properties near the Earth. We derive the largest solar wind peak velocities normalized to the coronal hole areas for coronal holes located near the solar equator and that they linearly decrease with increasing latitudes of the coronal holes. For coronal holes located at latitudes ≳ 60°, they turn statistically to zero, indicating that the associated high-speed streams have a high chance to miss the Earth. Similarly, the Kp index per coronal hole area is highest for the coronal holes located near the solar equator and strongly decreases with increasing latitudes of the coronal holes. We interpret these results as an effect of the three-dimensional propagation of high-speed streams in the heliosphere; that is, high-speed streams arising from coronal holes near the solar equator propagate in direction toward and directly hit the Earth, whereas solar wind streams arising from coronal holes at higher solar latitudes only graze or even miss the Earth. ©2018. The Authors.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/114405
Appears in Collections:气候减缓与适应

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作者单位: IGAM-Kanzelhöhe Observatory, NAWI Graz, Institute of Physics, University of Graz, Graz, Austria; DTU Space, National Space Institute, Kongens Lyngby, Denmark; Institut für Experimentelle und Angewandte Physik, Universität Kiel, Kiel, Germany; Hvar Observatory, Faculty of Geodesy, Zagreb, Croatia

Recommended Citation:
Hofmeister S.J.,Veronig A.,Temmer M.,et al. The Dependence of the Peak Velocity of High-Speed Solar Wind Streams as Measured in the Ecliptic by ACE and the STEREO satellites on the Area and Co-latitude of Their Solar Source Coronal Holes[J]. Journal of Geophysical Research: Space Physics,2018-01-01,123(3)
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