Uncertainties in estimates of fAPAR for photosynthesis (fAPARPSN) in tropical, Arctic/boreal, coastal, and wetland-dominant regions when approximated with fAPARcanopy and NDVI

Qingyuan Zhang, NASA Goddard Space Flight Center, Biospheric Sciences Laboratory, Greenbelt, MD, United States and Tian Yao, NASA Goddard Space Flight Center, Greenbelt, MD, United States