Energy Budget for the Coronal Mass Ejections occurred during 2008-2012
Abstract
We perform a numerical simulation study of the propagation, evolution, and interaction of 32 coronal mass ejections (CMEs) associated with magnetic clouds (MCs) observed near the Earth by the Wind spacecraft from 2008 to mid-2012. Coronagraph imagery from STEREO and SOHO are used to estimate the CMEs’ size, source location, and propagation speed as the inputs for the CME simulation. Pressure pulses of Gaussian shape are used to simulate the CMEs. The durations of the pressure pulses are tuned to match the arrival times of the simulated interplanetary (IP) shocks at the Wind spacecraft (or Earth). It is found that the total CME masses derived from the simulations modestly correlate to the CMEs’ speeds (cc=0.69). The total mass inputs in the simulation are also compared with the observations, with a correlation coefficient of 0.71. This result suggests that the initial speed of CME as determined from coronagraph imagery could be useful for predicting the arrival of CMEs at the Earth. Finally, we discuss the proper perturbation inputs (duration, ratio) of CMEs for performing space weather prediction. * This work was supported partially by the Chief of Naval Research.
- Publication:
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Solar Heliospheric and INterplanetary Environment (SHINE 2019)
- Pub Date:
- May 2019
- Bibcode:
- 2019shin.confE..22W