Abstract: Two extensive sets of spectral pyrheliometric data taken at Jerusalem in the years 1930?34 and 1961?68 have been analyzed. Seasonal and synoptic variations in the optical depth of the atmospheric aerosol and in its wavelength ...

Abstract: A five-year record of upper air data from 145 stations in the northern tropics was used to determine the statistical structure of meteorological fields, applying the ?optimal interpolation? method developed by Gandin. ...