An estimate is made, based mainly on surface measurements, of the net radiation entering or leaving the system atmosphere plus surface layer of earth at Kew during the whole period May 1953 to April 1954, and for separate periods of three summer and three winter months. The heat liberated by phase changes of H
2
O and the heat conduction from the system to the ground are also estimated. The deduced dynamical and advective heating is compared with the latitude means derived from similar world-wide studies, and from published studies of the meridional eddy flux of heat. In the course of this work new estimates are made of the local albedo for visual plus ultra-violet, infra-red and total radiation, and of the photometric albedo.
