Validation of Coronal and Heliospheric Models for Quasi-Steady Solar Wind: WSA-Enlil, MAS-Enlil, SWMF, and IPS Tomography Models
Wednesday, 17 December 2014
Multiple coronal and heliospheric models have been recently upgraded at the Community Coordinated Modeling Center (CCMC), including the Wang-Sheely-Arge (WSA)-Enlil, MHD-around-a-sphere (MAS)-Enlil, space weather modeling framework (SWMF), and interplanetary scintillation (IPS) tomography models. We run these models for Carrington rotations 2056 – 2062 (April – November 2007), in which the solar wind was in the late declining phase and Ulysses had a fast latitudinal scan at 1.4 – 1.8 AU. We compare the modeling results with the in situ observations: OMNI data for L1, MESSENGER, Venus Express and Ulysses, all together covering 0.3 – 1.8 AU. We assess the capabilities of these models in capturing quasi-steady solar wind features including sector boundaries and the fast-slow stream interaction regions. For this particular period, we derive the strengths, weaknesses, and discrepancies from observations for each model, and discuss the effect of photospheric magnetograms from different observatories, such as GONG and SOLIS magnetograms from National Solar Observatory (NSO) and magnetograms from Mount Wilson Observatory (MWO).