In genneral, Businger expression is used for determining a turbulance diffusion coefficient. In this study, it is applied to the surface elements of cities such as Asphalt, Ground, Grass, Pond. We set up 5 m-height bar and measured the dry temperature and wet temperature at the height of 0.13, 0.27, 0.5, 1.0, 3.0, 5.0 m.
In addition we measured the wind gradient and wind velocity at the height 3 m, solar radiation continuously for 48 hours on the surface. Compared the measured data to Businger expression, the result showed that Businger expression can be well applied to the complex surface of the city.

• 이상득(일본 오오사카 대학 공학부 환경공학과) | Sagn-Deug LEE
• 오은주(일본 오오사카 대학 공학부 환경공학과) | Eun-Joo OH