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 … Continue reading New Journal of Climate Study Reduces Doubled CO2 Climate Sensitivity By 40%, To 0.72°C