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Effective cloud optical depth or overcast conditions determined with a UV radiometers
journal contribution
posted on 2023-05-18, 07:26 authored by Serrano, D, Manuel NunezManuel Nunez, Utrillas, MP, Marin, MJ, Marcos, C, Martinez-Lozano, JAUsing a sky camera, episodes characterized by overcast low clouds in the Valencia region of Spain have been selected for analysis. One year of cloud optical depth data have been produced by inverting UV erythemal irradiance measured with a UVB-1 radiometer from Yankee Environmental Systems using the LibRadtran radiative transfer model. Measurement uncertainties, aerosol single scattering albedo and cloud properties are, in order of decreasing importance, the most important factors influencing the accuracy of cloud optical depth retrieval when using UV erythemal radiometers. Statistics for cloud optical depth show a highly skewed frequency distribution best described by a gamma distribution with highest frequency between optical depths of 10 and 15 and optical depths exceeding 100 at the extreme high end.
History
Publication title
International Journal of ClimatologyVolume
34Issue
15Pagination
3939-3952ISSN
0899-8418Department/School
School of Geography, Planning and Spatial SciencesPublisher
John Wiley & Sons LtdPlace of publication
The Atrium, Southern Gate, Chichester, England, W Sussex, Po19 8SqRights statement
Copyright 2014 Royal Meteorological SocietyRepository Status
- Restricted