
New research provides some crucial ground truth for a method of measuring plant photosynthesis on a global scale from orbit. The work shows that chlorophyll fluorescence, a faint glow produced by plant leaves as a byproduct of photosynthesis, is a strong proxy for photosynthetic activity in the canopy of a deciduous forest.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/grkj4yF2NVs/150430170752.htm