TBH, We Need To Be Thinking In Terms Of CO2E - That Is, CO2 Equivalent
When greenhouse gases come, they come not single spies but in battalions, and it's easy to forget that while CO2 is the primary driver of climate collapse, there are other compounds helping to shoulder the load of warming the atmosphere.
I'm going to keep this really short for now, but an excellent resource on this is from NOAA, - the Annual Greenhouse Gas Index. It compiles the impacts of all of the Kyoto-prescribed GHGs except for sulfur hexaflouride. And when it does, the results look like this:
Figure 4. Atmospheric histories since 1750 for CO2 abundance (black dashed line), CO2-equivalent abundance based on ongoing measurements of all greenhouse gases reported here (black line), and the AGGI (red line, right-hand scale). The measurements of CO2 between the 1950s and 1978 are from C.D. Keeling [Keeling et al., 1958]. Prior to 1978, atmospheric abundances are derived from air trapped in ice and snow above glaciers [Machida et al., 1995; Battle et al., 1996; Etheridge, et al., 1996; Butler, et al., 1999]. Equivalent CO2 atmospheric amounts (in ppm) are derived with the relationship (Table 1) between CO2 concentrations and radiative forcing from all long-lived greenhouse gases. The dashed orange lines highlight the reference year for the AGGI being assigned a value of 1.0 in 1990.
These are the results through 2023, and show that we're at the functional equivalent of +/- 525 ppm CO2 in the atmosphere - IOW, about 100 ppm above what the readings for CO2 alone show.
On that note, the AGGI page is a great resource showing how they track and calculate this information. There's some basic physics involved, but nothing that'll curl your hair.
https://gml.noaa.gov/aggi/aggi.html
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