Normalized Difference Vegetation Index-3rd generation (NDVI) using the Global Inventory Monitoring and Modeling System (GIMMS) 1981-2015

Normalized Difference Vegetation Index-3rd generation (NDVI) using the Global Inventory Monitoring and Modeling System (GIMMS): Vegetation indices are radiometric measures of photosynthetically active radiation absorbed by chlorophyll in the green leaves of vegetation canopies and are therefore good surrogate measures of the physiologically functioning surface greenness level of a region. For 30 years, Compton J. Tucker created the NDVI time series within the framework of the Global Inventory Monitoring and Modeling System (GIMMS) project. He carefully assembled it from different Advanced Very High Resolution Radiometer (AVHRR) sensors and accounting for various deleterious effects, such as calibration loss, orbital drift, volcanic eruptions, etc. The latest version of the GIMMS NDVI data set spans the period July 1981 to December 2015 and is termed NDVI3g (third generation GIMMS NDVI from AVHRR sensors).

基于全球库存监测与建模系统（Global Inventory Monitoring and Modeling System, GIMMS）生成的第三代归一化差分植被指数（Normalized Difference Vegetation Index-3rd generation, NDVI）：植被指数是对植被冠层绿叶中叶绿素所吸收的光合有效辐射开展的辐射度量，因此可作为表征区域地表生理活性绿度水平的优质替代指标。三十余年来，康普顿·J·塔克（Compton J. Tucker）在全球库存监测与建模系统（GIMMS）项目框架下构建了NDVI时间序列数据集。他通过整合多台高级甚高分辨率辐射计（Advanced Very High Resolution Radiometer, AVHRR）的观测数据，并校正了校准损耗、轨道漂移、火山喷发等各类干扰效应。GIMMS NDVI数据集的最新版本时间跨度为1981年7月至2015年12月，被命名为NDVI3g（即基于AVHRR传感器生成的第三代GIMMS NDVI数据集）。