Cloud observations for the statistical evaluation of the UV index at Toowoomba, Australia

Parisi, A. V. and Sabburg, J. and Turner, J. and Dunn, P. K. (2008) Cloud observations for the statistical evaluation of the UV index at Toowoomba, Australia. International Journal of Biometeorology, 52 (3). pp. 159-166. ISSN 0020-7128

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The development of a unique statistical model for the estimation of the UV index for all sky conditions with solar zenith angles of 60 degrees or less is reported. The model was developed based on available data from an integrated whole-sky automated sky camera and UV spectral irradiance measurement system that was collected every five minutes when the equipment was operational over a period of one year. The final model does not include terms directly associated with solar radiation, but rather employs terms, and interactions between these terms, including the parameters of sky cover, solar obstruction, and cloud brightness. The correlation between the estimations of the model and the measured values was 0.81. The developed model was evaluated on a data set spanning five months that had not been employed in the development of the model. The correlation for this new data set was 0.50 which increased to 0.65 for the cases when the clouds were considered to be a contributor to UV enhancement above that of a cloud free day.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Deposited in accordance with the copyright policy of the publisher. The original publication is available at
Faculty / Department / School: Historic - Faculty of Sciences - Department of Biological and Physical Sciences
Date Deposited: 02 Jan 2008 02:01
Last Modified: 02 Jul 2013 22:56
Uncontrolled Keywords: clouds; UVI; UV index; erythemal; skin cancer; erythema
Fields of Research : 11 Medical and Health Sciences > 1117 Public Health and Health Services > 111705 Environmental and Occupational Health and Safety
04 Earth Sciences > 0401 Atmospheric Sciences > 040103 Atmospheric Radiation
04 Earth Sciences > 0401 Atmospheric Sciences > 040106 Cloud Physics
Socio-Economic Objective: E Expanding Knowledge > 97 Expanding Knowledge > 970102 Expanding Knowledge in the Physical Sciences
Identification Number or DOI: 10.1007/s00484-007-0106-7

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