Progress in Remote Sensing of Photosynthetic Activity over the Amazon Basin.

ABSTRACT: Although quantifying the massive exchange of carbon that takes place over the Amazon Basin remains a challenge, progress is being made as the remote sensing community moves from using traditional, reflectance-based vegetation indices, such as the Normalized Difference Vegetation Index (NDVI), to the more functional Photochemical Reflectance Index (PRI). This new index, together with satellite-derived estimates of canopy light interception and Sun-Induced Fluorescence (SIF), provide improved estimates of Gross Primary Production (GPP). This paper traces the development of these new approaches, compares the results of their analyses from multiple years of data acquired across the Amazon Basin and suggests further improvements in instrument design, data acquisition and processing. We demonstr

SUBMITTER: de Sousa CHR 

PROVIDER: S-EPMC5785945 | biostudies-literature | 2017

REPOSITORIES: biostudies-literature