Current Composition of the Atmosphere, September, 2024

Guest post by Jim

NOAA has once again released its monthly updates to CO₂, CH₄, and N₂O. See the data section for each gas. 

https://gml.noaa.gov/ccgg/

Here are the previous results.

Here are the updated results; changes are more likely due to month-to-month fluctuations, not long term changes in trends:

Here are recent month to month variations from the moving average and its best fit.The crossing is now estimated to occur early March, 2030, give or take a month.

Here is the combination of historic data, satellite era data, and the most recent updates from NOAA: