8 07, 2021

Climate Sensitivity to CO2, what do we know? Part 2.

By |2021-07-08T14:43:40+02:008 July 2021|News, USA|Comments Off on Climate Sensitivity to CO2, what do we know? Part 2.

In Part 1, we introduced the concepts of climate sensitivity to CO2, often called ECS or TCR. The IPCC prefers a TCR of about 1.8°C/2xCO2 (IPCC, 2013, p. 818). TCR is the short-term, century scale, response of surface temperature to a doubling of CO2, we abbreviate the units as “°C/2xCO2.” In these posts we review lower [...]

5 07, 2021

Climate Sensitivity to CO2, what do we know? Part 1.

By |2021-07-08T11:23:20+02:005 July 2021|News, USA|Comments Off on Climate Sensitivity to CO2, what do we know? Part 1.

The IPCC claims, in their AR5 report, that ECS, the long-term temperature change due to doubling the atmospheric CO2 concentration or the “Equilibrium Climate Sensitivity,” likely lies between 1.5° and 4.5°C, and they provide no best estimate (IPCC, 2013, p. 85). But their average model computed ECS is 3.2°C/2xCO2. Here, “°C/2xCO2” is the temperature change [...]