The possibility that COS flux could be used as a proxy for photosynthetic CO 2 uptake is especially attractive because it is impossible to directly measure this CO 2 flux at scales above the leaf ...

The compound largely follows the same path through a leaf as CO2, ... “Nailing down our estimates of GPP with reliable global-scale observations is a critical step in improving our predictions of ...

GPP is typically cited in petagrams of carbon per year. One petagram equals 1 billion metric tons, which is roughly the amount of CO 2 emitted each year from 238 million gas-powered passenger ...