云南山地太阳总辐射的分布式模拟  

Distributed Simulation of Global Solar Radiation over Mountainous Region in Yunnan Province

作　　者：刘玲[1] 刘建栋[1] 邬定荣[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,南京210044 [3]云南省气候中心,昆明650034

出　　处：《气象与环境科学》2014年第1期13-19,共7页Meteorological and Environmental Sciences

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

摘　　要：在前人研究的基础上，对太阳总辐射模拟模型进行了改进：利用MODIS的地表反照率产品，取代前人研究中的计算地表反照的经验公式，并且在更短的积分步长内进行计算，进而开发了复杂地形下太阳总辐射的模拟模型。应用1000m分辨率的数字高程模型（DEM）数据以及常规气象资料和2个辐射站的实测总辐射数据对模型进行验证，结果表明：所建立的分布式太阳辐射模拟模型能准确地模拟云南的太阳总辐射，模拟值与实测值吻合非常好；云南年总辐射变化在3191～5858J·m^-2·s^-1之间，四季的辐射差异不大，春季稍高，冬季次之，其次是夏季，秋季稍低，这可能是受夏季降水量以及云量较多的影响。在区域分布上，云南省境内多山，地面起伏较大，对总辐射的区域分布产生了较大的影响，如红河及南盘江两岸等，因遮蔽度较大，总辐射较低。太阳总辐射是陆地生态系统最基本也是最重要的能量来源，在小网格的尺度上进行精细化的太阳总辐射计算可以为多个学科的研究提供重要的基础数据，本研究为此提供了一个计算案例。Based on former studies, this paper makes some improvements on the calculation of global solar radiation. The distributed simulation model of calculation of global solar radiation was developed using the surface albedo product of MODIS instead of the empirical model that were generally used by others. Model was run in a shorter step period than others. Model calibration was done based on the measured data in 2 radiation stations. Then the model was used to calculate the global radiation of Yunnan province using DEM with 1000 m resolution and general weather data. Results showed that： the model simulation results match well with measured data, indicates this model is capable to calculate global radiation in Yunnan province; yearly global radiation in study area varied between 3191-5858 J. m -2 ？ S -I ？ Global radiation of the representative month of the four seasons varied little. Among them, spring is the highest, followed by winter, then summer, and autumn has the lowest value, which may be affected by the summer precipitation and more cloud. At the regional distribution, there are more mountainous and altitude varied much in Yunnan province, and some areas were severe covered, which cause low radiation in this area, especially in Red rivers and N anpanjiang banks. Global solar radiation is the fundamental energy input for land ecological system, the calculation of global solar radiation under small grid, such was done in this paper, can offer important data for many research fields.

关 键 词：太阳总辐射 复杂地形 地表反照率 分布式模拟模型 

分 类 号：P422.1[天文地球—大气科学及气象学]