宁夏南部地表辐射和热量平衡的遥感研究  

Regional Distribution of Surface Heat and Radiation Balance Components over South Ningxia Using Remote Sensing Technique

作　　者：郭建茂[1] 陆维松[1] 闵文彬[2] 刘文泉[3] 王连喜 

机构地区：[1]南京信息工程大学应用气象系,南京210044 [2]中国气象局成都高原气象研究所,成都610071 [3]中国气象科学研究院,北京100081 [4]宁夏回族自治区气象防灾减灾重点实验室,银川750002

出　　处：《应用气象学报》2007年第5期702-708,共7页Journal of Applied Meteorological Science

基　　金：国家自然科学基金项目(40575057);中国气象局成都高原气象研究所开放实验室基金(LPM2005005);科技部社会公益项目(2001DIB10089)共同资助

摘　　要：为了研究和揭示宁夏南部地气能量传输过程及特点并进一步评估退耕还林还草的生态效应,利用Landsat-7ETM+卫星遥感资料所求取的地表特征参数,将地表分成水体、裸地、半裸地、草地、林地5类地表覆盖类型,结合常规气象观测资料,分别计算得出宁夏南部地表辐射和热量平衡各量的区域分布,并给出各量的分布图和直方图,分类别讨论了地表辐射和热量平衡各量分布特征,使得对宁夏南部区域地表辐射和热量平衡区域分布有一个直观、综合的了解和认识。研究表明,植被分布对地表辐射和热量平衡各量影响很大。The regional land surface heat and radiation balance components are very important and not easy to deal with. To study the components of surface radiation balance and heat balance over inhomogeneous landscape, the utilization of satellite remote sensing is indispensable. In this study, a parameterization method based on Land- sat-7 ETM ＋ data and 20 weather stations data is described to obtain the regional distributions of the compo- nents of surface radiation balance and surface heat balance over the south Ningxia area. The south Ningxia area is divided into five surface types： water surface, naked surface, half-naked surface area, grass area and forest area. The regional distributions of the components of surface radiation balance and surface heat balance are calculated and discussed according to each type. Further more, each distribution map and straight-bar figure of the components of surface radiation balance and surface heat balance is given. The results indicate that all the regional distributions are characterized by their terrain nature and the regional distributions are obvious. The figures of the mountains and rivers are very clear, it is because there is a great deal of vegetation over the mountains and rivers edge. It is seen that the derived regional distributions of surface radiation balance and surface heat balance components for the whole mesoscale area are in good accordance with the land surface status. The surface absorbed shortwave radiation is high over Liupan Mountain and Guanmen Mountain, and Yueliang Mountain and the rivers edge is high too, the minimum is in the naked area. In clear day, the surface absorbed shortwave radiation is mainly determined by surface reflectivity. The regional distribution of net radiation is similar to the surface absorbed shortwave distribution. The maximum latent heat flux is at Liupan Mountain which is second by Guanmen Mountain, Yueliang Mountain, rivers edge and other irrigated areas, the low latent heat flux areas are over naked areas. The regional di

关 键 词：地表热量平衡 地表辐射平衡 区域分布 遥感 宁夏南部 

分 类 号：P407[天文地球—大气科学及气象学] P422.4