Extended Data Figure 3: Time series analysis for seasonal cycles.
From: Agricultural Green Revolution as a driver of increasing atmospheric CO2 seasonal amplitude
a, Mauna Loa Observatory CO2, in parts per million, p.p.m. b, Mauna Loa Observatory CO2 growth rate, dCO2/dt; c, FTA from VEGAS; d, FTA from the atmospheric inversion of Jena81. Trends and high-frequency variations have been removed following ref. 23. The seasonal amplitude in Figs 2 and 3 is calculated as the difference between the maximum and minimum FTA each year.
