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Effective cloud optical depth or overcast conditions determined with a UV radiometers


Serrano, D and Nunez, M and Utrillas, MP and Marin, MJ and Marcos, C and Martinez-Lozano, JA, Effective cloud optical depth or overcast conditions determined with a UV radiometers, International Journal of Climatology, 34, (15) pp. 3939-3952. ISSN 0899-8418 (2014) [Refereed Article]

Copyright Statement

Copyright 2014 Royal Meteorological Society

DOI: doi:10.1002/joc.3953


Using 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.

Item Details

Item Type:Refereed Article
Keywords:UV radiation, cloud optical depth, UVER, overcast skies
Research Division:Earth Sciences
Research Group:Atmospheric sciences
Research Field:Atmospheric radiation
Objective Division:Environmental Management
Objective Group:Air quality, atmosphere and weather
Objective Field:Air quality, atmosphere and weather not elsewhere classified
UTAS Author:Nunez, M (Dr Manuel Nunez)
ID Code:98451
Year Published:2014
Web of Science® Times Cited:9
Deposited By:Geography and Environmental Studies
Deposited On:2015-02-17
Last Modified:2017-10-30

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