卫星遥感结合地面观测资料对中国西北干旱区地面感热通量的估算  

Estimation of Surface Sensible Heat Flux over the Arid Region of Northwest China with the Aid of Satellite Remote Sensing and Field Observations

作　　者：王慧[1] 李栋梁[1,2] 

机构地区：[1]南京信息工程大学气象灾害省部共建教育部重点实验室,江苏南京210044 [2]中国气象局兰州干旱气象研究所,甘肃兰州730020

出　　处：《中国沙漠》2011年第4期1022-1030,共9页Journal of Desert Research

基　　金：国家自然科学基金项目(40875059);干旱气象科学研究基金项目(IAM200801);江苏高校优势学科建设工程项目共同资助

摘　　要：利用黑河地区地-气相互作用野外观测试验研究(HEIFE)的地面观测资料,采用空气动力学方法,计算了干旱区内不同下垫面的地表热力输送系数CH值,结合由NOAA系列卫星遥感得到的反映地表植被特征的归一化差值植被指数(NDVI)资料,经拟合得到了针对不同下垫面的区域CH-NDVI参数化关系式,并对此关系式进行了合理性检验,最后,计算得到中国西北干旱区1982—2001年地面感热序列。中国西北干旱区地面感热通量的计算值与ERA-40再分析资料对比分析发现,两者在量级、地面感热分布形势和年际变化趋势等方面均较一致。目前对于区域尺度来说,在缺乏用其他方法获得较准确的区域地表热力输送系数的情况下,利用卫星遥感资料估算区域地表热力输送系数CH是较为可靠的方法。The surface thermal transfer coefficients（CH） of different underlying surfaces over the arid region of Northwest China are calculated using the air dynamics method with the HEIFE field observations,and the CH-NDVI parametric relational equations are obtained by fitting method with the aid of the normalized difference vegetation index（NDVI） data observed by NOAA remote sensing satellites,and then the reasonableness of the equations is tested.Finally,the surface sensible heat flux over the arid region of northwest China from 1982 to 2001 are calculated.The comparative analyses of the surface sensible heat flux calculated by the observations of conventional meteorological stations and ERA-40 reanalysis data show that both are uniform on magnitude,the surface sensible heat flux distribution and interannual change tendency.Therefore,estimation of the surface thermal transfer coefficients with the aid of satellite remote sensing and field observations is a credible way under the absence of other accurate methods.

关 键 词：干旱区 热力输送系数 NDVI 地面感热 HEIFE 

分 类 号：P422.4[天文地球—大气科学及气象学]