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What is global photosynthesis? History, uncertainties and opportunities
Ryu, Youngryel,Berry, Joseph A.,Baldocchi, Dennis D. Elsevier 2019 Remote sensing of environment Vol.223 No.-
<P><B>Abstract</B></P> <P>Quantifying global terrestrial photosynthesis is essential to understanding the global carbon cycle and the climate system. Remote sensing has played a pivotal role in advancing our understanding of photosynthesis from leaf to global scale; however, substantial uncertainties still exist. In this review, we provide a historical overview of theory, modeling, and observations of photosynthesis across space and time for decadal intervals beginning in the 1950s. Then we identify the key uncertainties in global photosynthesis estimates, including evaluating light intercepted by canopies, biophysical forcings, the structure of light use efficiency models and their parameters, like photosynthetic capacity, and relationships between sun-induced chlorophyll fluorescence and canopy photosynthesis. Finally, we review new opportunities with big data and recently launched or planned satellite missions.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Reviewed history of global photosynthesis since 1950s </LI> <LI> Reviewed uncertainties in remote sensing of global photosynthesis </LI> <LI> Reviewed emerging opportunities with recent and new satellite missions </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>