Bestimmung der atmosphärischen Trübungsparameter über Nord- und Zentralindien

Abstract

SummaryThe method introduced by ANGSTR6M [1,2] has been adopted for evaluating the atmospheric turbidity parameters, namely wavelength exponent c% and turbidity coefficient /~o 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 o% and ~0 have been correlated with the size distribution and the concentration of the dust particles in the atmosphere and the onsets and withdrawls of monsoon. Zusammenfassung Bestimmung der atmosph~irischen Triibungsparameter fiber Nord-und ZentralindienDie yon AN~STR6M [1, 21 entwickelte Methode wurde ffir die Auswertung der atmosphfirischen Trfibungsparameter, n~imlich des Wellenl/ingenexponenten c% und der Trfibungskoeffizienten /~0 aus Pyrheliometermessungen der direkten Son~ nenstrahlung ffir das Gesamtspektrum und ffir spezielle Spektralgebiete mittels Schott-Filtern angewandt. Die optische Durchl/issigkeit der Atmosph/ire fiber Indien und die wahrscheinliche Verteilung der Gr6~e der Aerosolteilchen werden auf Grund dieser Parameter diskutiert.

Note on aerosol scattering in India

“…In the papers published elsewhere [1,2], the authors have evaluated the turbidity parameters, namely, wavelength exponent ~ and turbidity coefficient/3, using pyrheliometric observations with and with-out standard Schott filters at a number of stations in India. The exponent c~ is closely related to the size-distribution as well as total concentration of the dust particles present in the atmosphere.…”