That is a nice link (showing global CO2 estimates in 2006). It illustrates how turbulence mixes the atmosphere at global scales. The video mentions that bette

That is a nice link (showing global CO2 estimates in 2006). It illustrates how turbulence mixes the atmosphere at global scales. The video mentions that better measurements will result from the OCO-2 mission, which launched in the meantime and has been measuring CO2 in ~3km^2 footprints across the globe since 2014. A result is: https://svs.gsfc.nasa.gov/4514 https://svs.gsfc.nasa.gov/4514 which shows vertically-resolved CO2. Both videos make it clear that CO2 is generally well-mixed both horizontally and vertically in the atmosphere, with the exception of Northern vs Southern hemisphere. I believe CO2 emissions from China, for example, take on the order of a week to propagate across the Pacific and reach the Western US.