秋季珠峰复杂地形下地表能量通量卫星遥感研究  

Study on Autumn Land Surface Fluxes over Complex Terrain Using Satellite Remote Sensing Data over the Mt. Qomolangma Region

作　　者：田辉[1] 马耀明[2] 文军[1] 李茂善[1] 孙方林[1] 马伟强[1] 

机构地区：[1]中国科学院寒区旱区环境与工程研究所西部气候环境与灾害实验室,甘肃兰州730000 [2]中国科学院青藏高原研究所,北京100081

出　　处：《高原气象》2007年第6期1293-1299,共7页Plateau Meteorology

基　　金：中国科学院知识创新工程重要方向项目(KZCX3-SW-231);国家重点基础研究发展计划项目(2005CB422003);国家自然科学基金项目(40705004;40675012;40533018)共同资助

摘　　要：依据目前较为成熟的地表能量通量遥感参数化方案，利用2006年9～10月珠峰地区秋季近地面大气梯度实测资料，结合中分辨率成像光谱仪MODIS卫星资料，遥感估算了包括珠峰地区在内的青藏高原南部地区地表能量通量的空间分布情况。结果表明：地表净辐射峰值约为420．0W·m^-2，介于200．0～620．0W·m^-2之间；地热通量峰值约为110．0W·m^-2，介于50．0～180．0W·m^-2之间；感热通量峰值约为270．0W·m^-2，介于120．0～280．0W·m^-2之间；潜热通量峰值约为90．0W·m^-2，介于0．0～250．0W·m^-2之间。由此可见，在高原季风期后的秋季，该地区白天地面加热场主要通过感热传输加热大气，地气之间水汽传输耗热是地表净辐射平衡中的小量。On the basis of the existing ripe remote sensing parameterization scheme of land surface en ergy fluxes, this study tries mapping the spatial distribution of autumn land surface fluxes over the vast southern Tibetan Plateau encompassing the Qomolangma region by combining MODIS data with the gradi ent data of surface layer atmosphere observed in the Qomolangma region from September to October of 2006. The result reveals that the land surface net radiation has a maximum value of 420.0 W·m^-2 or so, mainly in the range from 200.0 to 620.0 ·m^-2 ; the soil heat flux has a peak value of 110.0 W·m^-2 or so, mainly in the range from 50.0 to 180.0 W ·m^-2 ; the sensible heat flux has a maximum Value Of 270.0 W＂ m 2 or so, mainly in the range from 120.0 to 280.0 W ·m^-2; and the latent heat flux has a peak value of 90.0 W·m^-2or so, mainly in the range from 0.0 to 250.0 W·m^-2. Thus it is concluded that Autumn of in post-plateau monsoon, the daytime land surface heating field in the region assumes the principal form of the sensible heat to heat the atmosphere while the loss of energy consumed in the exchange of water between the land-surface and atmosphere is the minor term of the land surface energy balance.

关 键 词：珠峰地区 遥感 复杂地形 地表通量 

分 类 号：P404[天文地球—大气科学及气象学]