Correration Coefficients between Disturbance Indexes and Updraft Associated with Lightning Discharges Observed by Two Kinds of Radars and Safir
نویسنده
چکیده
The millimeter-wave radar observations of wintertime thunderstorms are compared with the Cband radar observations at Mikuni, Fukui. The difference between their echo intensities and the correlation between differential radial velocity and disturbance index are discussed in light of prediction of lightning discharges. The comparatively lower values of the millimeter-wave radar for the intense echo range seem to be effective to discriminate the increase of graupel particles in the cloud core that may produce lightning strokes. Also, the disturbance index shows a very high correlation coefficient with the convergence of horizontal velocity, being indicative of convective air motion as well.
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