“A collection of research results have been published in the peer-reviewed scientific literature in recent months that buoys my hopes for a low-end climate sensitivity.”

One of the key pieces to the anthropogenic climate/environment change puzzle is the magnitude of the earth’s climate sensitivity—generally defined as the global average temperature change resulting from a doubling of the atmospheric concentration of carbon dioxide (CO2).

One of the reasons that the “climate change” issue is so contentious is that our understanding of climate sensitivity is still rather incomplete. But new research efforts are beginning to provide evidence suggesting that the current estimates of the climate sensitivity should be better constrained and adjusted downwards. Such results help bolster the case being made by “lukewarmers”—that climate change from anthropogenic fossil-fuel use will be moderate rather than extreme, and that an adaptive response may be more effective than attempts at mitigation.…

[Editor note: This November 29, 2011, post is updated in light of the admission yesterday by climate activist Peter Gleick that he is the source of the stolen Heartland Institute documents. Gleick’s malfeasance continues the authoritarian, anti-intellectual behaviors exhibited by neo-Malthusians, most infamously revealed by Climategate, but also including the treatment of the late Julian Simon by Paul Ehrlich.

Updates on what is now being called GleickGate can be found on popular climate websites, including those of Andrew Revkin, Judith Curry, Watts Up With That, Climate Depot, and Climate Audit.]

I read all about it at Judith Curry’s blog (Breaking News: Gleick Confesses) and added this comment (now 250 and counting) at the midnight hour:

“Reducing greenhouse gas emissions is going to cost a lot (both in terms of dollars and effort), and it is going to produce few if any demonstrable climate results for decades to come (if ever).” 

The scientific community—or especially that part of it which holds the opinion that not enough is being done to mitigate potential climate change—is struggling with why the general public (and hence policymakers) are not heeding their call to action on global warming.

In a recent post, I pointed to one reason: the fast diminishing role that any U.S.-side mitigation would have in curbing greenhouse gas emissions enough to measurably affect global climate. This is a classic bang-for-the-buck evaluation. Reducing greenhouse gas emissions is going to cost a lot (both in terms of dollars and effort), and it is going to produce few if any demonstrable climate results for decades to come (if ever).…

“You may be interesting [sic] in this snippet of information about Pat Michaels. Perhaps the University of Wisconsin ought to open up a public comment period to decide whether Pat Michaels, [sic] PhD needs re-assessing?”

– Tom Wigley to ‘Folks’, October 14, 2009.

“I consider this to be an extremely serious matter. [The actions and climate views of] Mr. Bradley … may further damage both my personal and your company’s reputation.”

– Tom Wigley to Kenneth L. Lay (Enron), August 26, 1999.

“We sent [our paper] to Journal of Climate. I sent out about 10 copies–one to Wigley. But I requested that he not be used as a referee ‘because of an inexplicable hostility towards us (and possibly everyone else)’.”

– Gerald North to Robert Bradley (Enron), September 1999.