GEOSCAN Search Results: Fastlink


TitlePFSS-based solar wind forecast and the radius of the source-surface
AuthorNikolic, L
SourceSpace 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,
Alt SeriesNatural Resources Canada, Contribution Series 20180436
PublisherCambridge University Press (CUP)
MeetingInternational Astronomical Union Symposium 335: Space Weather of the Heliosphere: Processes and Forecasts; Exeter; GB; July 17, 2017
Mediapaper; on-line; digital
File formatpdf (Adobe® Reader®)
Subjectsgeophysics; extraterrestrial geology; geomagnetism; geomagnetic fields; geomagnetic variations; magnetic storms; models; magnetic field; solar cycles; Forecasting
Illustrationsgeophysical images; sketch maps; time series
ProgramPublic Safety Geoscience Northern Canada Geohazards Project
Released2018 01 01
AbstractThe 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.

Date modified: