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A technique for mapping downward longwave radiation using satellite and ground-based data in the tropics

Masiri, IO, Janjai, S, Nunez, M and Anusasananan, P 2017 , 'A technique for mapping downward longwave radiation using satellite and ground-based data in the tropics' , Renewable Energy, vol. 103 , pp. 171-179 , doi: 10.1016/j.renene.2016.11.018.

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Abstract

This paper presents a technique for mapping monthly average hourly downward longwave (LW↓) irradiance using ground- and satellite-based data. A model relating LW↓ irradiance to a satellite derived-brightness temperature of the earth-atmospheric system, relative humidity and ambient air temperature was formulated. This model was validated against LW↓ irradiance obtained from measurements at 4 sites in the tropics and discrepancy in terms of root mean square errors and mean bias errors was found to be 1.89% and −0.69%, respectively. After the validation, the model was used to calculate monthly average hourly LW↓ irradiance over Thailand and the results were displayed as LW↓ maps. These maps reveal the influence of various factors on LW↓ irradiance.

Item Type: Article
Authors/Creators:Masiri, IO and Janjai, S and Nunez, M and Anusasananan, P
Keywords: long wave radiation, satellite data, tropics
Journal or Publication Title: Renewable Energy
Publisher: Pergamon-Elsevier Science Ltd
ISSN: 0960-1481
DOI / ID Number: 10.1016/j.renene.2016.11.018
Copyright Information:

Copyright 2016 Elsevier Ltd.

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