Schlüter, Helena (2004) Modellierung der spektralen diffusen UV-Strahldichtefelder in Bodennähe für eine unbewölkte Atmosphäre. (Diploma thesis), Christian-Albrechts-Universität, Kiel, Germany, 94 pp.

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Abstract

The presentwork describes fields of UV-radiances at ground level from the simulation of a Monte-Carlo radiative transfer model as well as the differences of these to observed values. The optical properties of the atmosphere, like the albedo, the single scattering albedo and the Aerosol Optical Depth, were varried, in order to minimize the differences compared with the obbserved radiances. Maximum differences occure with viewing angles towards the sun, which did not become balanced also by the variation of the initial parameters into the model. These are partially due to the smoothing of the measured data in this direction. It could be obtained a optimal agreement without the the sun direction by taking absorbing aerosol particles into account. The difference with viewing angles in the direction of the sun bcomes recognizable in the strewing diagram. The use of observed atmosphere profiles of the huminty, ozone and the aerosols in the radiative transfer model do not supply th most optimal agreement with the measured radiances. It is an agreement with inconsistent behavior, since no uniform atmosphere condition for each wavelength could be found.

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