A simple interpretation of the surface temperature/vegetation index space for assessment of surface moisture status
A simple interpretation of the surface temperature/vegetation index space for assessment of surface moisture status
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DOI：
10.1016/s0034-4257(01)00274-7
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发表时间：
2002-02-01
影响因子：
13.5
通讯作者：
Andersen, J
中科院分区：
文献类型：
--
作者：
Sandholt, I;Rasmussen, K;Andersen, J
基于地表温度（Ts）与植被指数（NDVI）之间的经验参数化关系，提出了一个简化的陆面干燥度指数（Temperature-VegetationDryness Index，TNDI）。该指数与土壤湿度有关，与T-S/NDVI空间的现有解释相比，该指数在概念上和计算上都很简单。该指数仅以卫星获得的信息为基础，因此实际应用该指数的潜力很大。利用1990年覆盖西非塞内加尔北方半干旱地区Ferlo部分地区的37幅诺阿-高级甚高分辨率辐射计图像，分析了Tibet的空间格局和时间演变。空间格局在TDESS进行了比较模拟土壤水分从分布式水文模型的基础上MIKE SHE代码。在这种情况下，比从水文模型中得出的更精细的尺度上，TdR的空间变化反映了水分的变化。(C)2002年爱思唯尔科技有限公司All rights reserved.
A simplified land surface dryness index (Temperature-Vegetation Dryness Index, TVDI) based on an empirical parameterisation of the relationship between surface temperature (T-s) and vegetation index (NDVI) is suggested. The index is related to soil moisture and, in comparison to existing interpretations of the T-s/NDVI space, the index is conceptually and computationally straightforward. It is based on satellite derived information only, and the potential for operational application of the index is therefore large. The spatial pattern and temporal evolution in TVDI has been analysed using 37 NOAA-AVHRR images from 1990 covering part of the Ferlo region of northern, semiarid Senegal in West Africa. The spatial pattern in TVDI has been compared with simulations of soil moisture from a distributed hydrological model based on the MIKE SHE code. The spatial variation in TVDI reflects the variation in moisture on a finer scale than can be derived from the hydrological model in this case. (C) 2002 Elsevier Science Inc. All rights reserved.