Wednesday, July 21, 2021

Cloud Feedback Amplifies Global Warming, and a Few More Things

Just a few things I noticed today: 
  • "Invitation to ETI" is a Web site inviting extraterrestrial intelligence to establish communication with a group of 100 scientists: . Nothing yet but many hoaxes.
  • This is important and once more reinforces that the cloud feedback to climate change is positive, that is to say, causes more warming:
"Global satellite data shows clouds will amplify global heating," 7/19/21 

The paper is:

"Observational evidence that cloud feedback amplifies global warming," Paulo Ceppi and Peer Nowack, PNAS July 27, 2021 118 (30) e2026290118; 

from the abstract: 
"We show that global cloud feedback is dominated by the sensitivity of clouds to surface temperature and tropospheric stability. Considering changes in just these two factors, we are able to constrain global cloud feedback to 0.43 ± 0.35 W⋅m−2K−1 (90% confidence), implying a robustly amplifying effect of clouds on global warming and only a 0.5% chance of ECS below 2 K."
  • Finally:

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