Structures of Mode Conversion at the dayside Magnetopause Under Various IMF Conditions
Abstract
Mode conversion from compressional waves to kinetic Alfven waves (KAWs) has been suggested to lead to massive plasma transport at the magnetopause. Although our previous simulations associated with the quasi-parallel shock have shown the mode conversion for a special case under a radial interplanetary magnetic field (IMF), the global structure of the mode conversion under more general conditions has not been reported. In this paper, we examine the mode conversion process in the presence of various IMF By using our 3-D global hybrid simulations. The KAWs generated in the Alfven resonant surface in the magnetopause boundary layer (MPBL) are identified. The spectra of KAWs, characterizing the wave turbulence, are analyzed. The plasma diffusion coefficient is estimated and compared with the theories. These spectral results provide a detailed analysis of the wave polarization and relation that is consistent with the analytical theory of KAWs. The results are also compared with satellite observations at the dayside magnetopause. Meanwhile, 3-D broadband structures of KAWs in the downstream of the quasi-parallel shock are tracked. The global propagation and evolution of the waves are presented.
- Publication:
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AGU Fall Meeting Abstracts
- Pub Date:
- December 2013
- Bibcode:
- 2013AGUFMSM31A2114S
- Keywords:
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- 2724 MAGNETOSPHERIC PHYSICS Magnetopause and boundary layers;
- 2784 MAGNETOSPHERIC PHYSICS Solar wind/magnetosphere interactions;
- 7800 SPACE PLASMA PHYSICS