【作者】 张万昌； 刘三超； 蒋建军； 赵登忠；

【Author】 ZHANG Wan chang, LIU San chao, JIANG Jian jun, ZHAO Deng zhong ( International Institute of Earth System Sciences, Nanjing University , Nanjing 210093,China)

【机构】 南京大学国际地球系统科学研究所；

【摘要】 大范围非均匀陆表域的蒸散发计算非常复杂,在寒、旱区更甚。利用遥感和地理信息系统集成的方法,在基于数字高程模型(DEM)的PRISM空间内插方法得到的空间分布的初始气象参数输入的平台上,采用陆表能量平衡算法(SEBAL),从经过地形校正和大气校正等预处理的TM影像上反演出地表能量通量各分量的空间分布,从而得到黑河流域蒸散发。对使用该方法反演得到的地表通量各分量和日蒸发量的结果分析表明,本算法结果与HEIFI试验中观测到的若干测点结果非常吻合,与白天在黑河流域戈壁沙漠区潜热和蒸散发出现负值、而在绿洲植被区潜热大概为显热4倍左右野外观测结果非常一致,证明该方法对计算黑河流域非均匀陆表能量平衡和蒸散发是有效的。更多还原

【Abstract】 The computation of evapotranspiration over extensive and heterogeneous land surface, especially over the cold and arid region is quite complicated. In this paper, the method to integrate the remote sensing data and geographic information system (GIS) is used to retrieve the surface flux and evapotranspiration over the Heihe River basin from the remote sensing data, and the PRISM spatial interpolation method and the surface energy balance algorithm for land (SEBAL) are used to obtain the spatial distributions of initial meteorological parameters and surface energy flux. It is shown from the analysis results of retrieved data that the retrieved data are quite consistent with the observed data collected in the HEIFI experiment, which indicates that the retrieval method is applicable to the computation of the heterogeneous land surface energy balance and evapotranspiration over the Heihe River basin.更多还原