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KMID : 1024520000090060475
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Journal of the Environmental Sciences
2000 Volume.9 No. 6 p.475 ~ p.482
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Characteristics of Diurnal Variation of Wind over the South Korean
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Kim Young-Seop
Lee Dong-In
Han Young-Ho
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Abstract
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The purpose of this study is to find out the temporal and spatial characteristics of the diurnal wind variation between coastal and inland areas using the hourly wind data of 58 AWS-stations in the South Korea which are collected during the 10 years from 1980. Diurnal variation is investigated by using the Fast Fourier Transform(FFT), and the wind direction in investigated by comparing C(sub)r with C(sub)v represented the constancy of wind. For the scalar wind speed, the maximum wind speed occurs in the daytime 14h to 16h. The maximum diurnal amplitude at coastal areas occurs from 12h to 16h, and is about 2 hours faster than that at inland areas. Vector mean wind speed is strong at coastal areas and Chupungnyong, Kumi, Taegu of inland areas. The diurnal variation ellipses make a right angle with coastline show that the land and sea breezes are prevailing. The constancy of wind is strong at all observations in January. In the relationship between .
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KEYWORD
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diurnal wind variation, wind constancy, scalar wind speed, diurnal amplitude, vector mean wind speed, diurnal variation ellipse
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