In, 'Keeping Options Alive: The Scientific Basis for Conserving Biodiversity' I found the first pic:
It looks like starting in 1850 you see a dramatic increase in extinctions over early & preindustrial times.
It's a zoom-in of the second picture from: grimstad.uia.no/puls/climatech….
It's pretty clear extinctions follow CO2 emissions. This makes me wonder, is only seeking just below 1.5ºC by 2100 good enough?
What about going lower? What about returning to the climate (minus the unseasonable cold) of the 1750-1820s?
I did this in MAGICC, and again in pymagicc. When I modeled it a few years ago, I modeled CDR assuming we'd have peak emissions in 2020 and go sharply negative. I was able to hit close to 0.1ºC. But there are problems with this experiment.
The software wasn't calibrated to run my model, and may not be accurate. The experiment requires being rerun on a full AOGCM. However, it looks like an avenue worth pursuing. Listed below is a comparison of the experiments and RCP 2.6 IMAGE, and SSP1 1.9 & lmin in brown.
For more information on the project: bit.ly/cdrmexprj
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