한국농림기상학회지, 제 10권 제1호(2008) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 10, No. 1, (2008), pp. 25~31
DOI: 10.5532/KJAFM.2008.10.1.025
ⓒ Author(s) 2014. CC Attribution 3.0 License.


제주도 초지피복 기생화산(“오름”)의 방위별 일 최고기온 분포

서희철(1), 전승종(2), 윤진일(1)
(1)경희대학교 생태시스템공학과, (2)농촌진흥청 난지농업연구소

(2008년 02월 12일 접수; 2008년 03월 24일 수락)

Azimuthal Distribution of Daily Maximum Temperatures Observed
at Sideslopes of a Grass-covered Inactive Parasitic
Volcano (“Ohreum”) in Jeju Island

Hee-Chul Seo(1), Seung-Jong Jeon(2), Jin I. Yun(1)
(1)Department of Ecosystem Engineering, Kyung Hee University
(2)National Institute of Subtropical Agriculture, Rural Development Administration

(Received February 12, 2008; Accepted March 24, 2008)

ABSTRACT
Information on daily maximum air temperature is important in predicting the status of plants and insects, but the uneven and sparse distribution of weather stations prohibits timely access to the data in regions with complex topography. Since cumulative solar irradiance plays a critical role in determining daily maximum temperature on any sloping surfaces, derivation of a quantitative relationship between cumulative solar irradiance and the resultant daily maximum temperature is a prerequisite to development of such estimation models. Air temperatures at 8 sideslope locations with similar elevation and slope angle but aspect, circumventing a cone-shaped, grass-covered parasitic volcano (c.a., 570 m diameter for the bottom circle and 90m bottom-to-top height), were measured from June to December in 2007. Daily maximum temperatures from each location were compared with the average of 8 locations (assumed to be the temperature measured at a “horizontal reference” position). The temperature deviation at all locations increased with the day of year (or sun elevation) from summer solstice to winter solstice. Averaged over the entire period, the south facing location was warmer by 1oC in daily maximum temperature than “horizontal reference” and the north facing location was cooler by 0.8oC than the reference, resulting in the year round average south-north temperature difference of 1.8oC. In November, both south and north facing slopes showed the greatest deviation of +2.0oC and -1.3oC, respectively in daily maximum temperature at monthly scale. On a daily scale, the greatest deviation was +3.8 and 2.7oC at the south and north slope, respectively. The cumulative solar irradiance (on the slope for 4 hours from 11:00 to 15:00 TST) explained >60% of the variance in daily maximum temperature deviations among 8 locations, suggesting a feasibility of developing an estimation model for daily maximum temperature over complex topography at landscape scales.

Keyword:

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적요

초지피복 조건에서 사면의 일사수광량 차이가 일 최고기온에 미치는 영향을 파악하기 위해 2007년 하지부터 동지까지 밑면지름 570m, 높이 90m인 원추형 기생화산 “높은오름”의 측면 경사 8 지점에서 일 최고기온을 측정하였다. 8개 지점 평균값을 기준온도로 하여 각 지점의 기온편차를 구해 비교한 결과 기온편차는 하지로부터 동지로 갈수록 커지는 경향이었고, 관측기간 평균은 남향사면에서 1.0oC, 북향사면에서 −0.8oC로서 그 차이가 평균 1.8oC에 달했다. 기온편차의 월별 평균은 11월에 가장 크며 남향사면에서 2.1oC, 북향사면에서 −1.3oC였다. 일별 기온편차의 최대값은 남향사면에서 3.8oC, 북향사면에서 −2.7oC에 달했는데, 이러한 기온편차 변이는 일사수광량 편차에 근거한 지형특성지수와 높은 상관을 보여 복잡지형의일 최고기온 추정모형 개발에 활용될 수 있을 것으로 기대된다.

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