陇西黄土高原陆面蒸散的遥感研究

该文以陆面能量平衡过程为基础，基于定量遥感的理论，提出了适合半干旱区(陇西黄土高原)的陆面蒸散估算遥感模型(SEBS)。结合该区域的NOAA/AVHRR数据、气象观测数据、土地利用数据和地形高程(DEM)数据，依据定量遥感的理论和技术，计算反照率、陆面温度、植被指数和地表比辐射率四个重要地表特征参数。应用SEBS模型，估算了该区域的陆面蒸散量。结果表明：该研究具有较好的理论和实践意义，为陆面过程、植被生产、生态环境保护与生态重建等研究提供科学依据。

Study on Land Surface Evapotranspiration Based on Remote Sensing Data on Longxi Loess Plateau of China

Evapotranspiration (ET) in regional scale is not only a major component of energy balance and water balance, but also a linking medium between ecological system and climatic system. This paper aims to explore the surface energy balance system model (SEBS) using remote sensing to specifically estimate the ET in the study area, Longxi Loess plateau. Based on remotely sensed data (NOAA/AVHRR) and directly observed data (meteorological data, DEM data and land-use data,) severed surface biophysical parameters (e.g. albedo, surface temperature, vegetation index and surface emissivity) were calculated. These calculated parameters were then used to estimate ET temporally and spatially. The results showed that this research has important meaning both in theory and practice. Moreover it can give scientific basis to land surface processes, vegetation production, ecologic environment protection and ecology rebuilding.