Extended Data Fig. 3: Ecosystem photosynthetic light acclimation explained by light metrics other than light intensity.
From: Global evidence for the acclimation of ecosystem photosynthesis to light

The relationships between the maximum photosynthetic rate (Amax) of ecosystems and a, photoperiod (number of daytime hours per day) and b, total amount of photons (mol m−2 day−1) received by vegetation over the same 10-day windows used for \(\overline {{\mathrm{PPFD}}} _{{\mathrm{10}}}\).