한국농림기상학회지, 제 4권 제3호(2002) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 4, No. 3, (2002), pp. 133~140
ⓒ Author(s) 2014. CC Attribution 3.0 License.


냉기침강효과를 고려한 복잡지형의 최저기온 분포 추정

정유란(1), 서형호(2), 황규홍(3), 황범석(4), 윤진일(1)
(1)경희대학교 생태시스템공학과/생명자원과학연구원
(2)원에연구소 과수재배과 기상생태연구실, (3)농업과학기술원 환경생태과 농업기상실
(4)가평군농업기술센터

(2002년 06월 03일 접수; 2002년 07월 24일 수락)

Minimum Temperature Mapping in Complex Terrain Considering
Cold Air Drainage

Uran Chung(1), Hyeong-Ho Seo(2), Kyu-Hong Hwang(3), B.S. Hwang(4), Jin I. Yun(1)
(1)Department of Ecosystems Engineering/Institute of Life Science and Natural Resources, Kyung Hee University
(2)Fruit Tree Cultivation Division, National Horticultural Research Institute, RDA
(3)Agricultural Meteorology Lab., National Institute of Agricultural Science and Technology, RDA
(4)Gapyong Agricultural Technology Center, Gapyong, Gyunggi-Do

(Received June 03, 2002; Accepted July 24, 2002)

ABSTRACT
Site-specific minimum temperature forecasts are critical in a short-term decision making procedure for preventive measures as well as a long-term strategy such as site selection in fruits industry. Nocturnal cold air pools frequently termed in mountainous areas under anticyclonic systems are very dangerous to the flowering buds in spring over Korea, but the spatial resolution to detect them exceeds the current weather forecast scale. To supplement the insufficient spatial resolution of official forecasts, we developed a GIS – assisted frost risk assesment scheme for using in mountainous areas. Daily minimum temperature data were obtained from 6 sites located in a 2.1 by 2.1 km area with complex topography near the southern edge of Sobaek mountains during radiative cooling nights in spring 2001. A digital elevation model with a 10 m spatial resolution was prepared for the entire study area and the cold air inflow was simulated for each grid cell by counting the number of surrounding cells coming into the processing cell. Primitive temperature surfaces were prepared for the corresponding dates by interpolating the Korea Meteorological Administration’s automated observational data with the lapse rate correction. The cell temperature values corresponding to the 6 observation sites were extracted from the primitive temperature surface, and subtracted from the observed values to obtain the estimation error. The errors were regressed to the flow accumulation at the corresponding cells, delineating a statistically significant relationship. When we applied this relationship to the primitive temperature surfaces of frost nights during April 2002, there was a good agreement with the observations, showing a feasibility of site-specific frost warning system development in mountainous areas.

Keyword: frost warning, minimum temperature, nocturnal cold air pool, spatial interpolation, cold air drainage

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