基于DEM的广东山地高分辨率太阳辐射模拟研究  

SIMULATING THE SOLAR RADIATION IN MOUNTAINOUS AREA IN GUANGDONG PROVINCE BASED ON FINE DEM MESH

作　　者：邬定荣[1] 刘建栋[1] 刘玲[1] 姜朝阳[1] 申双和[2] 朱勇[3] 

机构地区：[1]中国气象科学研究院,北京100081 [2]南京信息工程大学,江苏南京210044 [3]云南省气候中心,云南昆明650034

出　　处：《热带气象学报》2014年第4期795-800,共6页Journal of Tropical Meteorology

基　　金：公益性行业(气象)科研专项(GYHY201106024;GYHY200906023)共同资助

摘　　要：对已有太阳总辐射模型进行改进,并利用MODIS产品取代地表反照率经验公式,在更小积分步长内进行计算,开发了复杂地形下太阳总辐射高分辨率模拟模型.应用1km分辨率的数字高程模型（DEM）数据以及常规气象资料,对广东2个辐射站的太阳总辐射进行验证.结果表明：（1）所建立的分布式太阳辐射模拟模型能准确模拟广东省太阳总辐射分布状况,模拟值与实测值吻合较好;（2）研究区域四季辐射中的夏季辐射最高,秋季次之,冬季最低,年均太阳总辐射为2 893～4 655 J/（m^2·s）,平均值为4 167 J/（m^2·s）; （3）大范围区域而言,广东夏、秋、冬季太阳总辐射的纬向分布十分显著,但从局地区域看,地形是影响太阳总辐射的主导因子.太阳总辐射是各种作物最基本也是最重要的能量来源,在小网格尺度上进行的精细化太阳总辐射计算可为多种作物的布局和种植规划提供重要的基础数据.Based on previous studies,this paper makes some improvements on the calculation of solar radiation.A distributed simulation model for calculation of solar radiation was developed using a surface albedo product of MODIS instead of an empirical model generally used.The model was run in a shorter step period than others.Model calibration was done based the measured data from 2 radiation stations.Then the model was used to calculate the solar radiation of Guangdong Province using DEM with a resolution of 1000m×1000m and general weather data.Results are shown as follows.（1） The model simulation results match well with the measured data,indicating that it is capable to calculate solar radiation in Guangdong Province.（2） Summer has the highest solar radiation,followed by autumn and then spring with winter having the least.Yearly solar radiation varies between 2 893 and 4 655 J/（m^2·s） with the average value of 4 167 J/（m^2·s）; （3） In addition to the spring,solar radiation in the other three seasons has negative relationship with latitude.In general,in Guangdong Province,latitude is the main factor which affects solar radiation on the large regional scale,but altitude plays the most important role in the distribution of solar radiation on the small spatial scales.Solar radiation is the fundamental energy input for many crops.Calculation of solar radiation in small grids means much for local governments and farmers since it can offer basic data for crop layout planning.

关 键 词：应用气象学 山地太阳总辐射 分布式模拟模型 地表反照率 广东省 

分 类 号：P422.1[天文地球—大气科学及气象学]