Abstract: Cloud amount and duration of sunshine are generally used to estimate direct and diffuse solar radiation income at the ground, where radiation instruments are not available. This method has serious drawbacks and a consideration ...

Abstract: The stations examined are Byrd (80°01? S, 119°31? W, 1533 m MSL), Wilkes(66°15? S, 110°35? E, 12 m MSL) and Sachs, Harbour, N.W.T. (71°57? N, 124°44? W, 84.4 m MSL). Synoptic observations for one year were used to calculate ...

Abstract: An energy budget model has been used, with daily synoptic surface and upper air data from four stations in East Africa, to calculate all terms of the surface energy balance once for each day and each night of 1973. The ...

Abstract: Since about 1950, considerable emphasis has been placed upon the registration of solar radiation in Africa by a number of the meteorological services of the territories on the continent. It is now considered that sufficient ...