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Title: eHEROES - Comparison of MHD Simulations of the Solar Wind with In-Situ Measurements
Authors: GRESSL, C. (UNIGRAZ); VERONIG, A.M. (UNIGRAZ); TEMMER, M. (UNIGRAZ); ODSTRCIL, D. (GMU)
Abstract: Knowledge of the background solar wind is an important input for CME propagation studies. Since in-situ measurements of the background solar wind are only available at 1 AU, we have to rely on heliospheric models to derive the distribution of solar wind parameters in IP space and hence, to do space weather forecasting. We test the performance of the solar wind models ENLIL/MAS, ENLIL/WSA (CCMC) and MAS (Predictive Science) by comparing model results with in-situ measurements from ACE and Wind. For the study we chose the years 2005 and 2007 as a time period with low solar activity. We found that the general structure of the background solar wind is well reproduced by the models. The best model results were obtained for the parameter solar wind speed. However, the predicted arrival times of high speed solar wind streams have typical uncertainties of the order of 1 – 1.5 days.
Insert date: 2013 Feb 12
Uploader: cgressl (880)
Topics:
solar wind
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File: gressl_hvar_sep2012.pdf (2663 KB)