Estimation of Daily Solar Radiation from Sunshine Duration in Thailand

Autor:	Samakkee Boonyawat, Satoshi Watanabe, Wonsik Kim, Somchai Baimoung, Saman Prakarnrat, Piyapong Tongdeenok, Masatoshi Aoki, Daisuke Komori
Rok vydání:	2011
Předmět:	Estimation Atmospheric Science Global solar radiation Meteorology Climatology Linear regression Sunshine duration Probability distribution Environmental science Empirical relationship Radiation Regression
Zdroj:	Journal of the Meteorological Society of Japan. Ser. II. :355-364
ISSN:	2186-9057 0026-1165
Popis:	The empirical relationship between solar radiation and sunshine duration in Thailand is studied in this paper. Although regional long-term regional solar radiation has not yet been measured in Thailand, the data of sunshine duration measurements are available. Hence, measurement of global solar radiation is conducted to find the relationship between daily solar radiation and sunshine duration, which is mostly linear. The distribution of regression coefficients is examined and the formula that can be applied in Thailand is estimated. The efficiency of the proposed formula is validated through its prediction. The result shows that the accuracy of the country-wide regression equations can be comparable to that constructed at each station. Moreover, it is found that the proposed equations are more effective from May to November than from December to April. The proposed equations are applied to estimate solar radiation in Thailand and the differences in their prediction are found in the characteristics of statistical distributions between May-November and December-April.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::010dd6a9ad077606b89d72327aa692bb https://doi.org/10.2151/jmsj.2011-a25 Zobrazit plný text záznamu