| Title | PFSS-based solar wind forecast and the radius of the source-surface |
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| Author | Nikolic, L |
| Source | Space weather of the heliosphere: processes and forecasts; by Foullons, C (ed.); Malandraki, O E (ed.); Proceedings of the International Astronomical Union vol. 13, S335, 2018 p. 307-309, https://doi.org/10.1017/S1743921317009875 |
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| Year | 2018 |
| Alt Series | Natural Resources Canada, Contribution Series 20180436 |
| Publisher | Cambridge University Press (CUP) |
| Meeting | International Astronomical Union Symposium 335: Space Weather of the Heliosphere: Processes and Forecasts; Exeter; GB; July 17, 2017 |
| Document | serial |
| Lang. | English |
| Media | paper; on-line; digital |
| File format | pdf (Adobe® Reader®) |
| Subjects | geophysics; extraterrestrial geology; geomagnetism; geomagnetic fields; geomagnetic variations; magnetic storms; models; magnetic field; solar cycles; Forecasting |
| Illustrations | geophysical images; sketch maps; time series |
| Program | Public Safety Geoscience Northern Canada Geohazards Project |
| Released | 2018 01 01 |
| Abstract | 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. |
| Summary | (Plain Language Summary, not published)
Space weather refers to the dynamic conditions on the Sun and in the space environment, in particular, in the near-Earth environment, that can affect
critical infrastructure. NRCan operates the Canadian Space Weather Forecast Centre and conducts research into space weather effects on power systems, pipelines, radio communications and GNSS positioning to help Canadian industry understand and
mitigate the effects of space weather. Since the Sun is the source of Space Weather disturbances, numerical modelling of the solar corona plays an important role. This paper investigates a widely used model of the solar corona and the dependence of
the results on the model parameters. |
| GEOSCAN ID | 314535 |
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