General Information
    • ISSN: 2010-0264
    • Frequency: Bimonthly (2010-2014); Monthly (Since 2015)
    • DOI: 10.18178/IJESD
    • Editor-in-Chief: Prof. Richard Haynes
    • Executive Editor: Ms. Nancy Y. Liu
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The University of Queensland, Australia
It is my honor to be the editor-in-chief of IJESD. The journal publishes good papers in the field of environmental science and development.
IJESD 2013 Vol.4(2): 107-110 ISSN: 2010-0264
DOI: 10.7763/IJESD.2013.V4.315

Variation of Net Radiation and Solar Spectrum in Thailand

Pannop Limhoon and Surat Bualert
Abstract—Variation of Net radiation and Solar spectrum in Thailand determine the Net radiation and Solar spectrum to compare the environment. The preparation databases amount of solar radiation to be aware change types quantity proportion and distribution of the ratio change each area can influence change the net radiation and spectrum of solar radiation that is received. Measuring and monitoring solar radiation at the wave length 350-1050 nm since November 2010 – February 2011 and March 2011 – March 2012 by instrument netradiometer, CNR4 and Spectroradiometer (EKO, MS-700). The results showed that net radiation was lowest in rainy season. In rainy season was highest decreasing percentage compared to summer. Seasonal variation of the averaged radiation at the wavelength range 351-1050nm showed a good agreement to net radiation, highest in summer rain and winter respectively. In the rainy season, massive cloud, and humidity in the air could absorb net radiation causes the net radiation decreasing at the wavelength range 700-1050 nm of the rainy season, more than other seasons. At the wavelength range 351-700nm, the net radiation decreasing in the winter caused by the station's location and wind direction which brought particles from the sea. Especially on sea salt affected the net radiation at the wave length range 351-700 nm. It showed a good agreement to [7] [10] which reported that in winter, % decrease was greater than any other seasons.

Index Terms—Seasonal variation, diurnal variation, net radiation, short-wave, solar radiation, particle concentration.

The authors are with the Environmental Science Department, Faculty Science, Kasetsart University, 50 Namwongvan Rd, Chatuchak Bangkok 10900, Thailand (e-mail:,


Cite:Pannop Limhoon and Surat Bualert, "Variation of Net Radiation and Solar Spectrum in Thailand," International Journal of Environmental Science and Development vol. 4, no. 2, pp. 107-110, 2013.

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