In a MasterResource article a few months back, I walked everyone through a series of recent scientific findings and described how they cast new light on how the total amount of observed global warming to date could be divvied upon among various causes. I ultimately concluded that the high confidence that the IPCC (and later echoed by the EPA) placed on the statement that “Most of the observed increase in global average temperatures since the mid-20th century is very likely due to the observed increase in anthropogenic greenhouse gas concentrations” was misplaced.

This line of reasoning was recently incorporated into statements made by Dr. Patrick Michaels when testifying before the U.S. House of Representatives, Committee on Science and Technology, Subcommittee on Energy and Environment.

During the questions and answers portion of the hearing, one of the other panelists, Dr.…

Last Wednesday, November 17, 2010, the Subcommittee on Energy & Environment of the Committee on Science and Technology of the U. S. House of Representatives held a hearing on climate change titled “A Rational Discussion of Climate Change: the Science, the Evidence, the Response.” In a clear deference to the incoming make-up of the House, there were a relatively high number of panelists that were invited by the sitting minority, which made this hearing more “rational” and fascinating that than most subcommittee hearings in some time.

The Republican invitees were Richard Lindzen, Patrick Michaels, and Judith Curry.

The first two are stalwarts of the let’s-just-hold-on-a-minute view of catastrophic anthropogenic global warming. And, true to form, at the hearing each presented compelling evidence as to why anthropogenic greenhouse gas emissions might not rapidly push up global temperature—not now, nor in the future.…

“As I have argued for years, we simply do not know the answer [to the sensitivity of climate to greenhouse gas forcing]. There is a wide margin of error in many of the ingredients that go into the [climate] models. For example, we do not know some of the radiative properties of the aerosols to a factor of 5. No matter how good your climate model is, you cannot compensate for that uncertainty. The range of uncertainty is broad enough to accommodate [Patrick] Michaels (well, maybe North) and [Jerry] Mahlman.”

– Gerald North (Texas A&M) to Rob Bradley (Enron), September 17, 1999

“One has to fill in what goes on between 5 km and the surface. The standard way is through atmospheric models. I cannot make a better excuse.”

– Gerald North (Texas A&M) to Rob Bradley (Enron), October 2, 1998

“We do not know much about modeling climate.

[Editor note: This is Part V of a series of posts on the political activism of climate scientists at Texas A&M.]

“I really enjoyed the ‘fact’ that I saved you from being a ‘climate alarmist’. Frankly, your descriptions of my colleague Andrew Dessler are outrageous. You seem to forget that he spent several hours tutoring you and your student from [Kinkaid] on climate change during a university holiday. As I said to Steve McIntyre after spending hours trying to help him, then being mocked in his blog, ‘No good deed goes unpunished’. I am afraid to say anything more to you via email.”

– Gerald North to Rob Bradley, April 17, 2010 (cc Eric Berger, William Dawson, Andrew Dessler)

Dear Jerry:

I asked for substantive feedback from you to my post(s) and instead got a sarcastic, emotional response.…