what's the best rigorous case for the plausibility of runaway / extinction-level climate change?
what are you referring to when you say current projections are worse? afaik cmip5 models are widely seen as somewhat too sensitive
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and this is a subset of them, so i have no idea what that means
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the authors say this "could" happen which doesn't mean anything, though they do seem to be using a central estimate under their assumptions
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Current projections, because all the non-worst case projected scenarios assumed there would be some significant climate-change mitigation action by now, and instead effectively nothing significant changed. Also, warming over land will be higher than the global average.
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the research here uses land temperatures and rcp8.5 emissions (no mitigation, high population growth, low tech growth)
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