Introduction
This article is the fourth in a series of four articles.
Part 1 of the series (Part 1) is
here
Part 2 of the series (Part 2) is
here
Part 3 of the series (Part 3) is
here
In Part 1, simple mathematical formulae were developed to emulate the carbon dioxide (CO2.) contribution to global temperature change, as represented in the computer climate models.
In Part 2, the formulae were used to have a look at the Medieval Warming Period (MWP) and Little Ice Age (LIA).
In Part 3, the formulae were used to have a look at the period used in Al Gore’s film
An Inconvenient Truth.
Part 4 looks at the major components of equilibrium climate sensitivity (ECS). ECS is key to all of the findings of the IPCC and to the computer climate models.
Note : This article does not say anything new, or claim to find any new results. It has all been said many times before. But it does look at ECS from a logical perspective.