Mesoscale distributions of UV spectral irradiance obtained by merging satellite remote sensing and ground-based measurements

Melanie A. Wetzel; James R. Slusser

doi:10.1117/12.508654

4 November 2003 Mesoscale distributions of UV spectral irradiance obtained by merging satellite remote sensing and ground-based measurements

Melanie A. Wetzel, James R. Slusser

Author Affiliations +

Proceedings Volume 5156, Ultraviolet Ground- and Space-based Measurements, Models, and Effects III; (2003) https://doi.org/10.1117/12.508654
Event: Optical Science and Technology, SPIE's 48th Annual Meeting, 2003, San Diego, California, United States

Abstract

Global atmospheric trends in ozone column amount has focused attention on the environmental risk of exposure to ultraviolet (UV) radiation. Monitoring UV irradiance in diverse and remote locations is necessary to understand the variability of exposure, dose rates and resultant vulnerability of ecological systems. The USDA UV-B Monitoring Program maintains a wide network for ground-based continuous measurement of solar radiation in several wavelengths of interest for photosynthesis, plant growth and UV exposure to humans. This network provides data for analysis of UV climatology and trends at those sites. A satellite-based technique for producing mesoscale-resolution mapped distributions of UV spectral irradiance has been developed for extending this information into a region surrouding the network sites. The methodology combines radiative transfer modeling, multispectral image pixel classification, cloud optical depth retrievals and auxiliary remote sensing data. The results of the method are compared with ground-based measurements and utilized to examine the role of cloud distribution and surface albedo in determining mesoscale variability of UV exposure in high-latitude and high-altitude environments.

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Melanie A. Wetzel and James R. Slusser "Mesoscale distributions of UV spectral irradiance obtained by merging satellite remote sensing and ground-based measurements", Proc. SPIE 5156, Ultraviolet Ground- and Space-based Measurements, Models, and Effects III, (4 November 2003); https://doi.org/10.1117/12.508654

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