Modeling of CMEs from Sun to Earth with Merged Coronal and Heliospheric MHD Computations*

Details Modeling of CMEs from Sun to Earth with Merged Coronal and Heliospheric MHD Computations* Modeling of CMEs from Sun to Earth with Merged Coronal and Heliospheric MHD Computations*

May 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001agusm..sh62a02o&link_type=abstract

American Geophysical Union, Spring Meeting 2001, abstract #SH62A-02

Statistics

Computation

2111 Ejecta, Driver Gases, And Magnetic Clouds, 2139 Interplanetary Shocks

Scientific paper

The initiation of coronal mass ejections (CMEs) and their subsequent manifestation in interplanetary space is a topic of great interest in coronal and heliospheric science that also has important implications for understanding and predicting space weather at Earth. We demonstrate the computation of a CME initiated in the corona and its subsequent propagation to Earth orbit by the merging of coronal and heliospheric numerical MHD models. These models employ different physical approximations and numerical grids to simulate physical phenomena as well as possible over their respective spatial and temporal domains. The computation starts by developing a steady-state helmet streamer configuration with a heliospheric current sheet separating interplanetary magnetic fields of opposite polarity. The disruption of the helmet streamer by magnetic flux cancellation launches a CME (simulated by the coronal model) which evolves during its propagation through interplanetary space (simulated by the heliospheric model). The merging of the models enables accurate tracking of the CME from its origin in the solar atmosphere to its geoeffective consequences at the Earth. *This work is supported by Boston University's Integrated Space Weather Modeling project, funded by NSF.

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