Density-variance effects in turbulent magnetic reconnection

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Density variance effects in the turbulent magnetic reconnection are investigated in the framework of the magnetohydrodynamics (MHD). In the presence of the density variance, which is expected to be large in the vicinity of shock where a large density gradient is located, several turbulent correlations arising from the density fluctuations affect the mean field evolutions. A contribution to the turbulent electromotive force (EMF) arises from the obliqueness of the mean magnetic field and the density gradient. In the slow mode MHD shock configuration, this effect is expected to enhance the turbulence level in the vicinity of shock front.