Extended Data Figure 1 : Simulated and observed CO2 concentrations.

From: Projected land photosynthesis constrained by changes in the seasonal cycle of atmospheric CO2

Extended Data Figure 1

a, b, Time series of monthly mean atmospheric CO2 between 1860 and 2005 at BRW (a) and KMK (b) at surface level, as simulated by the CMIP5 models in the historical simulations and observed (black lines) at each measuring site.