Figure 1.

Monthly minimum gradients of δXCO₂(the perturbation induced by changes in FFCO₂between 2019 and 2020) relative to the South Pole simulated over the months of February, March, and April 2020 around local noon. They are all negative. The minimum value in the figure is −2.3, −2.2, −3.5, and −7.4 ppm in February, March, April, and May, respectively. Subtracting δXCO₂at South Pole removes the changes induced by the global growth rate.