Carbon Dioxide Movie Night: The Global Picture • Watts Up With That?
Most of the CO2 concentration variability is in the Northern Hemisphere, especially north of 60°N. This variability “whips” its way towards the southern hemisphere. There is also a persistent “bulge” in the concentration of CO2 that resides in a zone between the equator and about 45°N, and this is particularly apparent in the low pass “residue” plot.
Source: wattsupwiththat.com