Radar Climatology of Supercell Thunderstorms in Northern and Central Greece

Abstract

The scattered radiation intensity at constant solar elevations and the precipitable water depth have been obtained at the Atmospheric Physics Laboratory of the University of Patras. The scattered radiation intensity at constant solar ele-vation and the simultaneous values of the precipitable water depth present the same seasonal variation with a summer maximum and a winter minimum. The simulta-neous data of the scattered i.e. the diffuse radiation intensity (W/m 2) and the pre-cipitable water depth were separated in two data sets, one corresponding to the continental and one to the maritime air masses. In the Part I the regression of the scattered radiation intensity at the solar elevation angles 30° and 50° with the precipitable water depth was presented and in the present Part II the regression at 20°, 40°, 60° and 70° is being presented. This regression shows a higher diffuse radiation summer maximum and a lower diffuse radiation winter minimum in the prevalence of continental air mass than that of maritime. The aim of this work is the computation of the diffuse radiation intensity from data of precipitable water depth, relative atmospheric mass and air masses type, continental or maritime.