高速公路道面温度预报

Prediction of Expressway Surface Temperature

应用地表热量平衡方程,考虑太阳短波辐射、大气和地面的长波辐射、潜热、感热传输等能量之间的平衡,并考虑水汽、气溶胶、浮尘以及云等对太阳短波辐射的吸收和散射,建立了一种较实用的道面温度预报模型。对北京市回龙观站和大羊坊北桥站2011年夏季及冬季对道面温度和自动气象站的常规气象要素观测进行模拟分析,并与该时段内所测到的道面温度进行对比。结果表明:两站道面温度的预测值与实测值的相关系数均在0.90左右,雨雪天时相关系数较小。这表明该模型具有一定的预报水平,且对夏季和冬季不同天气条件下道面温度预报结果均较好,可以运用于高速公路路面状况的实际预报中。

By using surface energy balance equation,considered the balance among solar short-wave radiation,atmospheric and ground long-wave radiations,latent heat fluxes and sensible heat fluxes,a forecasting model for the road surface temperature was established,in which the parameterizations of absorption and scattering of vapor,aerosol,dust and cloud were also adopted.The observations of the surface temperature and the automatically collected meteorological sensor measurements in summer and winter of 2011 in Huilongguan station and Dayangfang north bridge station,Beijing were simulated and analysed,and was compared with the observation data during the period.The results show that the correlation coefficients of prediction and observation of the road surface temperature at the two stations on the sunny,cloudy and overcast day are more than 0.90,while they are lower on the rainy and snowy day,which indicates the model has a good forecast performance,it could provide good predictions of road surface temperature under different weather conditions in summer and winter,and can be used to predict the road conditions of expressway.