Astronomy and Astrophysics – Astrophysics
Scientific paper
Jun 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009spwea...706004m&link_type=abstract
Space Weather, Volume 7, Issue 6, CiteID S06004
Astronomy and Astrophysics
Astrophysics
2
Interplanetary Physics: Solar Wind Sources, Solar Physics, Astrophysics, And Astronomy: Corona, Space Weather: Forecasting (2722), Space Weather: Models
Scientific paper
I develop and document a set of procedures which test the quality of predictions of solar wind speed and polarity of the interplanetary magnetic field (IMF) made by coupled models of the ambient solar corona and heliosphere. The Wang-Sheeley-Arge (WSA) model is used to illustrate the application of these validation procedures. I present an algorithm which detects transitions of the solar wind from slow to high speed. I also present an algorithm which processes the measured polarity of the outward directed component of the IMF. This removes high-frequency variations to expose the longer-scale changes that reflect IMF sector changes. I apply these algorithms to WSA model predictions made using a small set of photospheric synoptic magnetograms obtained by the Global Oscillation Network Group as input to the model. The results of this preliminary validation of the WSA model (version 1.6) are summarized.
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