New Journal of Climate Study Reduces Doubled CO2 Climate Sensitivity By 40%, To 0.72°C
By Kenneth Richard on 22. January 2024
Doubling the 2005 CO2 concentration (380 ppm) to 760 ppm only produces a globally-averaged 2.26 W/m² perturbation at the top of the atmosphere (TOA). This doubled-CO2 forcing is close to 0 W/m² for large portions of the globe – including below 0 W/m² for Antarctica.
The IPCC claims doubling CO2 produces a 3.7 W/m² TOA forcing, which is a 1.2°C direct (no feedback) temperature differential using the IPCC’s 0.32°C per 1 W/m² formula (Seinfeld, 2008).
Image Source: Seinfeld, 2008
A new study (Chen et al., 2023) published in Journal of Climate assesses doubling CO2 from 380 to 760 ppm only yields 2.26 W/m², 1.71 W/m², and 0.55 W/m² forcing at the TOA, surface, and troposphere, respectively. These forcing values represent 0.72°C, 0.55°C, and 0.18°C temperature differentials, respectively (0.32°C/W/m²).
https://notrickszone.com/2024/01/22/new-journal-of-climate-study-reduces-doubled-co2-climate-sensitivity-by-40-to-0-72c/
