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Richards S Courtney's comment
#1
From HERE

Quote: richardscourtney says:
November 24, 2012 at 3:17 pm

Steven Mosher:

At November 24, 2012 at 2:42 pm you quote Jim Cripwell saying at November 24, 2012 at 11:55 am:

There is no CO2 signal in the form of a significant rate of rise of temperature in excess of 0.06 C per decade in any temperature/time graph since 1970. Therefore there is a strong indication that the climate sensitivity of CO2 is indistinguishable from zero

And you reply:

The only way the sensitivity to C02 can be zero is if
1. the climate sensitivity is zero
2. the forcing from c02 is zero.

We know that climate sensitivity cannot equal zero. If it was, the earth would not change temperature. Remember climate sensitivity is the change in temperature per change in watts.

Your reply is a clear example of the ‘straw man’ fallacy.

Cripwell did not say
“there is a strong indication that the climate sensitivity of CO2 is zero”.
He said
“there is a strong indication that the climate sensitivity of CO2 is indistinguishable from zero”.
And he is right.

Empirical – n.b. not model-derived – determinations indicate climate sensitivity is less than 1.0deg.C for a doubling of atmospheric CO2 equivalent. This is indicated by the studies of Idso from surface measurements
http://www.warwickhughes.com/papers/Idso_CR_1998.pdf
and Lindzen & Choi from ERBE satelite data
http://www.drroyspencer.com/Lindzen-and-...L-2009.pdf
and Gregory from balloon radiosonde data
http://www.friendsofscience.org/assets/d...ne2011.pdf

These independent determinations each suggests that climate sensitivity is ~0.4deg.C for a doubling of CO2 equivalent

If climate sensitivity is less than 1.0deg.C for a doubling of CO2 equivalent, then it is physically impossible for the man-made global warming to be large enough to be detected because natural variability is much, much larger. If something exists but is too small to be detected then it only has an abstract existence; it does not have a discernible existence that has effects (observation of the effects would be its detection).

Climate sensitivity of CO2 is measured to be indistinguishable from zero. Live with it.

Richard
It is our attitude toward free thought and free expression that will determine our fate. There must be no limit on the range of temperate discussion, no limits on thought. No subject must be taboo. No censor must preside at our assemblies.

–William O. Douglas, U.S. Supreme Court Justice, 1952
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