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PFSS-Based Solar Wind Forecast and the Radius of the Source-Surface

Published online by Cambridge University Press:  24 July 2018

Ljubomir Nikolić Open the ORCID record for Ljubomir Nikolić [Opens in a new window]
Ljubomir Nikolić*
Affiliation:
Canadian Hazards Information Service, Natural Resources Canada, 2617 Anderson Road, Ottawa, ON, K1A 0E7, Canada email: [email protected]
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Abstract

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The potential-field source-surface (PFSS) model of the solar corona is a widely used tool in the space weather research and operations. In particular, the PFSS model is used in solar wind forecast models which empirically associate solar wind properties with the numerically derived coronal magnetic field. In the PFSS model, the spherical surface where magnetic field lines are forced to open is typically placed at 2.5 solar radii. However, the results presented here suggest that setting this surface (the source-surface) to lower heights can provide a better agreement between observed and modelled coronal holes during the current solar cycle. Furthermore, the lower heights of the source-surface provide a better match between observed and forecasted solar wind speed.

Keywords

Sun: coronaSun: magnetic fieldssolar wind
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 13 , Symposium S335: Space Weather of the Heliosphere: Processes and Forecasts , July 2017 , pp. 307 - 309
Copyright
Copyright © International Astronomical Union 2018 

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