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Abstract

In this study, a model for calculating monthly average hourly diffuse erythemal solar ultraviolet (EUV) radiation under all sky conditions in Thailand was developed. The model is a function of air mass, aerosol optical depth and satellite-derived cloud index, as these parameters are sensitive to diffuse EUV radiation. Diffuse EUV irradiance were measured using UV-biometers equipped with shade ball during April 2011-March 2014 at four stations in Thailand. Data from these stations were used to formulate the model. The model was validated using an independent dataset (April 2014-March 2016) at the same sites. The modeled diffuse EUV irradiance showed good agreement with that from the ground-based measurements, with root mean square difference (RMSD) of 12.7% and mean bias difference (MBD) of -2.8%. The use of satellite data provided a simple and practical method to calculate monthly average hourly diffuse EUV irradiance over Thailand. Spatial monthly distributions are shown as maps.

Item Type:	Article
Authors/Creators:	Choosri, P and Janjai, S and Nunez, M and Buntoung, S and Chanalert, W
Keywords:	diffuse radiation, mapping, satellite data, solar ultraviolet radiation
Journal or Publication Title:	Journal of Atmospheric and Solar-Terrestrial Physics
Publisher:	Pergamon-Elsevier Science Ltd
ISSN:	1364-6826
DOI / ID Number:	https://doi.org/10.1016/j.jastp.2017.06.003
Copyright Information:	Copyright 2017 Elsevier Ltd.
Related URLs:	UTAS Profile: Nunez, M
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