In this study, we analyze changes in soil heat flux and air temperature in August (summer) and January (winter) according to net radiation, at a mud flat in Hampyeong Bay. Net radiation was observed as -84.2~696.2 W/m2 in August and -79.4~352.5 W/m2 in January. Soil heat flux was observed as -80.7~139.5 Wm-2 in August and -49.09~137 W/m2 in January. Air temperature was observed as 24.2~32.9˚C in August and -1.5~11.1˚C in January. The rate of soil heat flux for net radiation (HG/RN) was 0.17 in August and 0.34 in January. Because the seasonal fluctuation in net radiation was bigger than the soil heat flux, net radiation in August was bigger than in January. We estimated a linear regression function to analyze variations in soil heat flux and air temperature by net radiation. The linear regression function and coefficient of determination for the soil heat flux by net radiation was y=0.19x-7.94, 0.51 in August, and y=0.39x-11.69, 0.81 in January. The time lag of the soil heat flux by net radiation was estimated to be within ten minutes in August 2012 and January 2013. The time lag of air temperature by net radiation was estimated at 160 minutes in August, and 190 minutes in January.

Abstract
 1. 서 론
 2. 연구 방법
 3. 결과 및 고찰
 4. 결 론
 REFERENCES

• 박호선(부경대학교 환경대기과학과) | Ho-seon Park (Department of Environmental Atmospheric Sciences, Pukyong National University)
• 권병혁(부경대학교 환경대기과학과) | Byung Hyuk Kwon (Department of Environmental Atmospheric Sciences, Pukyong National University)
• 김일규(부경대학교 환경공학과) | Il-Kyu Kim (Department of Environmental Engineering, Pukyong National University)
• 소윤환(부경대학교 지구과학연구소) | Yoon Hwan So (Geo-Sciences Institute, Pukyong National University)
• 오세봉(한국농어촌공사) | Se Bong Oh (Korea Rural Community Corporation)
• 강동환(부경대학교 환경연구소) | Dong-hwan Kang (Environmental Research Institute, Pukyong National University) Corresponding author