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arXiv · 1605.05360

Data Constrained Coronal Mass Ejections in A Global Magnetohydrodynamics Model

M. Jin·W. B. Manchester·B. van der Holst·I. Sokolov·G. Toth·R. E. Mullinix·A. Taktakishvili·A. Chulaki·T. I. Gombosi
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Abstract

We present a first-principles-based coronal mass ejection (CME) model suitable for both scientific and operational purposes by combining a global magnetohydrodynamics (MHD) solar wind model with a flux rope-driven CME model. Realistic CME events are simulated self-consistently with high fidelity and forecasting capability by constraining initial flux rope parameters with observational data from GONG, SOHO/LASCO, and STEREO/COR. We automate this process so that minimum manual intervention is required in specifying the CME initial state. With the newly developed data-driven Eruptive Event Generator Gibson-Low (EEGGL), we present a method to derive Gibson-Low (GL) flux rope parameters through a handful of observational quantities so that the modeled CMEs can propagate with the desired CME speeds near the Sun. A test result with CMEs launched with different Carrington rotation magnetograms are shown. Our study shows a promising result for using the first-principles-based MHD global model as a forecasting tool, which is capable of predicting the CME direction of propagation, arrival time, and ICME magnetic field at 1 AU (see companion paper by Jin et al. 2016b).

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M. Jin, W. B. Manchester, B. van der Holst, I. Sokolov, G. Toth, R. E. Mullinix, A. Taktakishvili, A. Chulaki, T. I. Gombosi. 2016-11-27. Data Constrained Coronal Mass Ejections in A Global Magnetohydrodynamics Model. https://doi.org/10.3847/1538-4357%2F834%2F2%2F173

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