Frequency of Clouds in Height Layers for Berlin (Tempelhof)

Abstract

This article investigates the feasibility of establishing charts of frequency occurrence of clouds within given height layers from tabulations of cloud base frequencies. The general method is described and simplification is discussed deriving a K-factor similar to that suggested by Spreen and Solomon. Charts of cloud frequency within layers by the hour of the day in four seasons at Berlin (Tempelhof) are presented for 10/10 stratiform clouds. They show a belt of maximum cloud frequency between 600?1200 m in winter, which shifts to 1500?1800m in summer. Diurnal variation of this belt is indicated in spring and fall. The core of the isolines decreases from 30?35 per cent in winter to 7.5?10 per cent in summer.