Photochemical reflectance index (PRI) and remote sensing of plant CO2 uptake.

The article focuses on the relationship between photochemical reflectance index (PRI) and light use efficiency (LUE) for global monitoring of plant primary productivity from space. It notes that the relationship of PRI with LUE is reinforced by the fact that PRI measures the relative reflectance on either side of the green reflectance hump of the ecosystems. It explores the consistency between PI and LUE and the calculations involved during environmental monitoring.