Seminar: Implementing the Multi-VP coronal model in EUHFORIA

Implementing the Multi-VP coronal model in EUHFORIA:  Test-case results and comparisons with the WSA coronal model

Abstract: The EUropean Heliospheric FORecasting Information Asset (EUHFORIA) is a new 3D magnetohydrodynamic (MHD) space weather prediction tool (Pomoell and Poedts, 2018). EUHFORIA models solar wind and coronal mass ejections (CMEs) all the way from the Sun to 2 AU. It consists of two different spatial domains; the coronal part, which extends from the solar surface to 0.1 AU and the heliospheric part, which covers the spatial domain from 0.1 AU onwards. For the first part, the semi-empirical Wang-Sheeley-Arge (WSA; Arge et al., 2004) model is currently used, in combination with the potential field source surface (PFSS) model (Altschuler and Newkirk, 1969) and the Schatten current sheet (SCS) model (Schatten et al., 1969). The goal of these models is to reconstruct the magnetic field up to 0.1 AU and produce the plasma boundary conditions required by the 3D MHD heliospheric part to initiate. In the current work, we replace the default WSA model with Multi-VP (Pinto and Rouillard, 2017) and compare their modeled output with EUHFORIA at 0.1 AU and 1 AU, for high-speed stream cases during the minimum and maximum solar activity. Further comparisons for the cases of interest are made by employing different magnetograms.

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Friday, February 26, 2021 - 10:30 to 11:30

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