We analyzed diurnal variations in the surface air temperature using the high density urban climate observation network of Daegu in summer, 2013. We compared the time elements, which are characterized by the diurnal variation of surface air temperature. The warming and cooling rates in rural areas are faster than in urban areas. It is mainly due to the difference of surface heat capacity. In addition, local wind circulation also affects the discrepancy of thermal spatiotemporal distribution in Daegu. Namely, the valley and mountain breezes affect diurnal variation of horizontal distribution of air temperature. During daytimes, the air(valley breeze) flows up from urban located at lowlands to higher altitudes of rural areas. The temperature of valley breeze rises gradually as it flows from lowland to upland. Hence the difference of air temperature decreases between urban and rural areas. At nighttime, the mountains cool more rapidly than do low-lying areas, so the air(mountain breeze) becomes denser and sinks toward the valleys(lowlands). As the result, the air temperature becomes lower in rural areas than in urban areas.

1. 서론
 2. 자료 및 분석방법
 3. 결과
  3.1. 기온 공간분포의 시간변화
  3.2. 기온일변화의 시간적 요소의 분포
 4. 결론
 감사의 글
 REFERENCES

• 김상현(계명대학교 지구환경학과, Department Of Global Environment, Keimyung University) | Sang-Hyun Kim
• 김백조(국립기상연구소 응용기상연구과, Applied Meteorology Research Division, National Institute of Meteorological Research) | Baek-Jo Kim
• 김해동(계명대학교 지구환경학과, Department Of Global Environment, Keimyung University) | Hae-Dong Kim Corresponding author