IX.—On some Causes of the Formation of Anticyclonic Stratus as observed from Aeroplanes

Abstract

SUMMARYThe following is a summary of the more important conclusions which have been put forward in this paper:—1. The Nature and Distribution of Stratus in Anticyclones.(1) Stratus clouds have an adiabatic temperature gradient below them, and a reversed gradient above them; within the cloud the gradient is usually adiabatic. The same relations hold for well-defined layers of haze.(2) On the northern and eastern sides of anticyclones there is nearly always a layer of stratus, or of haze with cloud patches; the height of this layer varies between 3000 and 6000 feet above the surface, but the level is usually the same over a very large area.(3) Stratus is common in winter on the southern sides of anticyclones.