Journal of Environmental Science International (한국환경과학회지)

The Korean Environmental Sciences Society (한국환경과학회)
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Diurnal Variations in the Horizontal Temperature Distribution using the High Density Urban Climate Observation Network of Daegu in Summer

고밀도 도시기후관측 망 자료를 이용한 대구의 여름철 기온 수평 공간 분포의 일변화

  • Kim, Sang-Hyun (Department of Global Environment, Keimyung University) ;
  • Kim, Baek-Jo (Applied Meteorology Research Division, National Institute of Meteorological Research, KMA) ;
  • Kim, Hae-Dong (Department of Global Environment, Keimyung University)
  • 김상현 (계명대학교 지구환경학과) ;
  • 김백조 (국립기상연구소 응용기상연구과) ;
  • 김해동 (계명대학교 지구환경학과)
  • Received : 2015.10.06
  • Accepted : 2016.01.04
  • Published : 2016.02.29
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Abstract

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.

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References

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