the most relevant thing i've found is this https://www.researchgate.net/profile/Gary_Russell3/publication/256666715_Climate_sensitivity_sea_level_and_atmospheric_CO2/links/54e60be80cf277664ff20993.pdf …
this is based on rcp8.5 which i think is widely considered pessimistic even for a business as usual emissions scenario
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rcp8.5 has us *now* at about 425ppm CO2-equivalent. (Staying under 500 through 2030.) This number, by NOAA, (which may account for short term warming differently, since it doesn't match) seems to say we're currently at close to 500, still accelerating - https://www.esrl.noaa.gov/gmd/aggi/aggi.html …
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"These extreme wet bulb temperatures are concentrated in small parts of India, China, and the Amazon"
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they estimate a million person-days of uninhabitable temperatures so i don't know what that implies in terms of number of people affected
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NG article talks about 2060 and this paper talks about 2070-2080, which is also confusing
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