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

I. Masiri, S. Janjai, M. Nunez and P. Anusasananan

Renewable Energy, 2017, vol. 103, issue C, 171-179

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.

Keywords: Downward longwave radiation; Satellite data; Tropics (search for similar items in EconPapers)
Date: 2017
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Persistent link: https://EconPapers.repec.org/RePEc:eee:renene:v:103:y:2017:i:c:p:171-179

DOI: 10.1016/j.renene.2016.11.018

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