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   which
reported that in winter, % decrease was greater than any other
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: firstname.lastname@example.org, email@example.com).
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.