No, it's not. https://twitter.com/RogerPielkeJr/status/1424712163281694725
This is more media fearmongering.
Edit: Threadreader link https://threadreaderapp.com/thread/1424712163281694725.html
This is more media fearmongering.
Edit: Threadreader link https://threadreaderapp.com/thread/1424712163281694725.html
Essentially what he's saying is that the conclusions in the report are based heavily on the more-extreme, though less-likely outcomes (i.e., exaggerating the truth of the impact of climate change based on observational data by using extreme models/predictions). The report also ignores his (Roger's) own heavily-cited research in favor of a less-cited resource that confirms their biases.
Edit: this is problematic because it generates headlines like the one this article is using and sends people into a panic spiral (as opposed to focusing on long-term solutions and actual science).