Impact of clouds with limited horizontal extent on UV radiation measurements

John M. Davis; James R. Slusser

doi:10.1117/12.561496

14 October 2004 Impact of clouds with limited horizontal extent on UV radiation measurements

John M. Davis, James R. Slusser

Proceedings Volume 5545, Ultraviolet Ground- and Space-based Measurements, Models, and Effects IV; (2004) https://doi.org/10.1117/12.561496
Event: Optical Science and Technology, the SPIE 49th Annual Meeting, 2004, Denver, Colorado, United States

Abstract

UV radiation measurements from many sites throughout the US are employed on a routine basis to assess biologically significant dosages to plant, animal and humans and to retrieve aerosol optical depths and ozone column concentrations. In various recent studies the impact of clouds on the derived quantities has become a topic of interest. In particular, when clouds are present during measurements used for aerosol retrievals, their impact may depend on the cloud’s height in the atmosphere, the cloud thickness and, for clouds of limited horizontal extent, on the horizontal displacement from the instrument site and the relative geometry between the cloud, the instrument and the sun. Results from a Monte Carlo radiative transfer model, which has been adapted to include the effects of ozone absorption in the UV, will be presented. The impact of clouds with high aspect ratio (cloud height / cloud width) on biologically significant dosages will also be addressed.

Citation Download Citation

John M. Davis and James R. Slusser "Impact of clouds with limited horizontal extent on UV radiation measurements", Proc. SPIE 5545, Ultraviolet Ground- and Space-based Measurements, Models, and Effects IV, (14 October 2004); https://doi.org/10.1117/12.561496

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