Determination of atmospheric turbidity parameters over the north and central India

Abstract

The method introduced by Ångström [1, 2] has been adopted for evaluating the atmospheric turbidity parameters, namely wavelength exponent α0 and turbidity coefficient β0 at a number of stations in the north and central India from the pyrheliometric measurements of direct solar radiation for entire spectrum and for specified spectral regions using Schott filters. The optical clarity of the atmosphere over India and the probable size distribution of the aerosols therein have been discussed here on the basis of the inference drawn from these parameters. The annual variations in α0 and β0 have been correlated with the size distribution and the concentration of the dust particles in the atmosphere and the onsets and withdrawls of monsoon. © 1971 Springer-Verlag.