한국농림기상학회지, 제 15권 제4호(2013) (pISSN 1229-5671, eISSN 2288-1859)
Korean Journal of Agricultural and Forest Meteorology, Vol. 15, No. 4, (2013), pp. 291~297
DOI: 10.5532/KJAFM.2013.15.4.291
ⓒ Author(s) 2014. CC Attribution 3.0 License.


맑은 날 한낮의 사면 기온분포와 일사 수광량 간 관계

김수옥(1), 윤진일(2)
(1)(재)국가농림기상센터, (2)경희대학교 식물환경신소재공학과

(2013년 10월 03일 접수; 2013년 12월 04일 수정; 2013년 12월 19일 수락)

Distribution of Midday Air Temperature and the Solar Irradiance
Over Sloping Surfaces under Cloudless Condition

Soo-ock Kim(1), Jin I. Yun(2)
(1)National Center for Agro-Meteorology, Seoul National University, Seoul 151-742, Korea
(2)College of Life Sciences, Kyung Hee University, Yongin 446-701, Korea

(Received October 03, 2013; Revised December 04, 2013; Accepted December 19, 2013)

ABSTRACT
Automated weather stations were installed at 9 locations with, three different elevations, (i.e., 50m, 100m, and 300m a.s.l.) with different slope and aspect in a small watershed (50km2 area). Air temperature at 1500 LST and solar radiation accumulated for 1100-1500 LST were collected from January to December 2012. Topography of the study area was defined by a 30 X 30 m digital elevation model (DEM) grid. Accumulated solar irradiance was calculated for each location with the spatially averaged slope and aspect of surrounding circles with 5, 10, 15, 20, 25, and 30 grid cell radii, respectively. The 1500 LST air temperature from clear sky conditions with zero cloud amount was regressed to the 1100-1500 LST solar irradiance at 9 locations. We found the highest coefficient of determination (r2 = 0.544) at 25 grid cell radius and the temperature variation in this study was explained by Y = 0.8309X + 0.0438, where Y is 1500 LST temperature (in oC) and X is 1100-1500 LST accumulated solar irradiance (in MJ/m2‘>).

Keyword: Daily maximum temperature, Solar irradiance, Slope and aspect, Complex terrain

MAIN

적요

소규모 집수역에서 한낮 기온의 분포와 일사수광량간 관계를 관찰하기 위해 고도 50m급 3곳, 100m급 3곳, 300m급 3곳 등 9지점의 사면에 경사향을 달리하여 무인기상관측기를 설치하고 1년간 매일 1500 기온과 직전 시간(1100-1500) 일사량자료를 수집하였다. 운량이 0인 맑은 날에 한정하여 각 지점의 사면 일사수광량을 계산하고 1500 기온과 비교하였다. 이때 각 지점의 경사도(slope)와 경사향(aspect)은 30 × 30 m 격자를 기준으로 반경이 5, 10, 15, 20, 25, 30개 격자로 평활화 하여 사용하였다. 1500 기온에 미치는 직전 4시간 일사수광량 간에는 통계적으로 유의한 회귀관계가 인정되었으며, 반경 25개 격자(750m)로 평활화한 경우 사면 기온변이의 54%를 설명할 수 있었다(y = 0.8309x + 0.0438, r2 = 0.5444).

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