The GLOBMAP Leaf Area Index (Version 3) provides highly consistent long time series leaf area index (LAI) data since 1981, and the product is continuously updated. The data covers the global vegetation area, with a spatial resolution of 8km and latitude and longitude coordinates. The product is obtained based on the quantitative fusion inversion of AVHRR and MODIS data, and the inversion results of AVHRR and MODIS data before and after 2000. The algorithm first uses the GLOBCARBON LAI algorithm (Deng et al., 2006) to retrieve the MODIS LAI sequence based on the MODIS surface reflectance product MOD09A1, then constructs the relationship between AVHRR GIMMS NDVI and MODIS LAI pixel level based on the overlapping observations of two sensors, and reverses the AVHRR LAI based on this relationship.
File name: GLOBMAP LAI data is stored in GeoTIFF format. The file name is "GlobeMapLAIV3. Ayyyyddd. Global. LAI. tif", where yyyy represents the year and ddd represents the Julian date. For example, GlobeMapLAIV3. A2016001. Global. LAI. tif represents the GeoTIFF file that describes the leaf area index of the upper reaches of the Yangtze River and southwest China on the first day of 2016. Data reading method: All GeoTIFFs in the dataset can be directly opened with Arcgis.
Liu, R. (2022). 8km GLOBMAP LAI dataset in the upper reaches of the Yangtze River and southwest China (1981-2020). Upper Yangtze River Scientific Data Center, DOI: 10.5281/zenodo.4700264. (Download the reference：
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| East: 112.50 | West: 89.00 |
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| South: 20.50 | North: 36.50 |
