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http://dx.doi.org/10.5532/KJAFM.2009.11.4.185

On Recent Variations in Solar Radiation and Daily Maximum Temperature in Summer  

Choi, Mi-Hee (Department of Ecosystem Engineering, Kyung Hee University)
Yun, Jin-I. (Department of Ecosystem Engineering, Kyung Hee University)
Publication Information
Korean Journal of Agricultural and Forest Meteorology / v.11, no.4, 2009 , pp. 185-191 More about this Journal
Abstract
Few studies have attempted to analyze variations of daily maximum temperature in the summer whereas many studies have analyzed warming trends in other seasons with respect to greenhouse gases or urban heat islands. We analyzed daily maximum temperature data for the summer season (June to August) at 18 locations in South Korea from 1983 to 2007. Compared to the climatic normal (from 1971 to 2000), an average increase of $0.1^{\circ}C$ was found for the summer daily maximum temperature along with an increase of $0.61MJ\;m^{-2}$ in daily solar radiation. Approximately 65% of the annual variations of the summer daily maximum temperature could be explained by the solar radiance alone. Higher atmospheric transmittance due to lower aerosol concentration (especially of sulfur dioxide) is believed to have caused the recent increase in solar irradiance. Daily maximum temperature of the summer is expected to keep rising if the clean air activities are maintained in the future.
Keywords
Aerosol; Atmospheric transmittance; Daily maximum temperature; Global brightening; Solar radiation;
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