UM 자료를 이용한 노면온도예측모델(UM-Road)의 개발
Development of Road Surface Temperature Prediction Model using the Unified Model output (UM-Road)
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A road surface temperature prediction model (UM-Road) using input data of theUnified Model (UM) output and road physical properties is developed and verified with the useof the observed data at road weather information system. The UM outputs of air temperature,relative humidity, wind speed, downward shortwave radiation, net longwave radiation, precipitationand the road properties such as slope angles, albedo, thermal conductivity, heat capacityat maximum 7 depth are used. The net radiation is computed by a surface radiation energy balance,the ground heat flux at surface is estimated by a surface energy balance based on theMonin-Obukhov similarity, the ground heat transfer process is applied to predict the road surfacetemperature. If the observed road surface temperature exists, the simulated road surfacetemperature is corrected by mean bias during the last 24 hours. The developed UM-Road isverified using the observed data at road side for the period from 21 to 31 March 2013. It isfound that the UM-Road simulates the diurnal trend and peak values of road surface temperaturevery well and the 50% (90%) of temperature difference lies within ± 1.5oC (± 2.5oC)except for precipitation case.
Abstract
A road surface temperature prediction model (UM-Road) using input data of theUnified Model (UM) output and road physical properties is developed and verified with the useof the observed data at road weather information system. The UM outputs of air temperature,relative humidity, wind speed, downward shortwave radiation, net longwave radiation, precipitationand the road properties such as slope angles, albedo, thermal conductivity, heat capacityat maximum 7 depth are used. The net radiation is computed by a surface radiation energy balance,the ground heat flux at surface is estimated by a surface energy balance based on theMonin-Obukhov similarity, the ground heat transfer process is applied to predict the road surfacetemperature. If the observed road surface temperature exists, the simulated road surfacetemperature is corrected by mean bias during the last 24 hours. The developed UM-Road isverified using the observed data at road side for the period from 21 to 31 March 2013. It isfound that the UM-Road simulates the diurnal trend and peak values of road surface temperaturevery well and the 50% (90%) of temperature difference lies within ± 1.5oC (± 2.5oC)except for precipitation case.
참고문헌 (15)
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