地表蒸散发是土壤—植被—大气系统中能量和水循环的重要环节,它包括土壤、水体和植被表面的蒸发,以及植被蒸腾。随着地表参数多源遥感产品的快速发展,利用不同地表参数遥感产品估算地表蒸散发以及其组分土壤蒸发和植被蒸腾成为日常监测越来越便利,监测尺度已从单站扩展到田块、区域乃至全球。目前地表蒸散发双层遥感估算模型按照建模机理的不同可分为:系列模型、平行模型、基于特征空间的模型、结合传统方法的模型以及数据同化方法。本文从模型构建物理机制、模型驱动数据以及模型输出结果验证等方面总结了上述模型的发展历史和现状,并指出在模型结构与参数化方案的优化、高分辨率模型驱动数据的发展、土壤蒸发和植被蒸腾像元尺度“地面真值”的获取等方面都仍需进一步完善。 Surface evapotranspiration is an important part of the energy and water cycle in the soil-vegetation-atmosphere system. It includes the evaporation of soil, water and vegetation surfaces, and the transpiration of vegetation. With the rapid development of multi-source remote sensing products with surface parameters, it is more and more convenient to estimate the surface evapotranspiration and its components of soil evaporation and vegetation transpiration as daily monitoring with remote sensing products with different surface parameters. The monitoring scale has been extended from single stations to fields, Regional and global. At present, the estimation model of evapotranspiration based on double-layer remote sensing can be divided into series model, parallel model, model based on feature space, model combining traditional method and data assimilation method according to different modeling mechanism. This paper summarizes the development history and current situation of the above models from the aspects of physical mechanism of model building, model-driven data and verification of output results of the model. It also points out that in the optimization of model structure and parameterization schemes, the development of high-resolution model-driven data, And vegetation transpiration pixel scale “ground truth ” access and so on still need to be further improved.