REMOTE ESTIMATION OF SOIL-MOISTURE AVAILABILITY AND FRACTIONAL VEGETATION COVER FOR AGRICULTURAL FIELDS
REMOTE ESTIMATION OF SOIL-MOISTURE AVAILABILITY AND FRACTIONAL VEGETATION COVER FOR AGRICULTURAL FIELDS
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DOI：
10.1016/0168-1923(90)90100-k
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发表时间：
1990-08-01
影响因子：
6.2
通讯作者：
SCHMUGGE, TJ
中科院分区：
文献类型：
--
作者：
CARLSON, TN;PERRY, EM;SCHMUGGE, TJ
本文的目的是提出一种利用远程测量来估计部分植被冠层植被比例、表面能量通量以及根区和土壤表面含水量的方法。主要工具是具有植被和基质成分的边界层模型以及两个图像产品：表面辐射温度与归一化差异植被指数 (NDVI) 的变化，以及辐射表面温度与辐射表面温度的标准偏差。该方法基于确定：（1）阳光照射裸露土壤和茂密阳光照射植被的两个辐射表面温度的渐近值； (2) NDVI 和地表温度之间的关系，我们称之为变化轴。该方法通过法国 HAPEX 现场实验（1986 年）期间在 Lubbon 进行的飞机和表面测量进行了说明。
The purpose of this paper is to present a method for using remote measurements to estimate vegetation fraction, surface energy fluxes and the root zone and soil surface water contents for partial vegetation canopies. The primary tools are a boundary layer model with vegetation and substrate components and two image products: the variation of surface radiometric temperature vs. normalized difference vegetation index (NDVI), and the standard deviation of radiometric surface temperature vs. radiometric surface temperature. The method is based on determining: (1) asymptotic values of two radiometric surface temperatures for sunlit bare soil and for dense sunlit vegetation; and (2) a relationship between NDVI and surface temperature, which we call the axis of variation. The method is illustrated using aircraft and surface measurements made at Lubbon during the French HAPEX field experiment (1986).