Sensitivity is the equilibrium change in global-mean temperature per
unit of radiative forcing. Linearity has been demonstrated up to much
higher forcings than will ever be reached by even the most pessimistic
scenarios.
Early IPCC reports might cover this. I recall work by Kiehl on this back
in the mid 1980s -- too far back to recall the reference.
Tom.
+++++++++++++++++
On 2/20/2012 5:28 AM, Robert Chris wrote:
I am engaged in discussion with a modestly prominent climate skeptic
who argues that global warming isn't a problem because as CO2
concentrations rise climate sensitivity reduces. I recall coming
across this notion before but I don't know how much peer-reviewed work
has been done on it. I'd appreciate some help with references to peer-
reviewed papers that address the idea that climate sensitivity may be
logarithmic rather than linear so that as atmospheric CO2
concentrations rise the effective climate sensitivity reduces and
discuss the likely levels at which this reduction becomes significant
in terms of reducing the GWP of CO2.
-----------------------------
Robert Chris
The Open University
r.g.ch...@open.ac.uk
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