Debate Question For Professor Steve Schneider and Colleagues

The weblog

Comments On “The Global Warming Debates: Stephen Schneider” In The May 24 2009 Issue Of The Examiner.Com By Thomas Fuller

included a statement by Professor Steve Schenider that

If these guys think they are “winning” why don’t they try to take on face to face real climatologists at real meetings–not fake ideology shows like Heartland Institute–but with those with real knowledge–because they’d be slaughtered in public debate by Trenberth, Santer, Hansen, Oppenheimer, Allen, Mitchell, even little ol’ me. It’s easy to blog, easy to write op-eds in the Wall Street Journal.”

In the following, I propose a debate (on-line and in person) of the following:

  • The human influence is minimal and natural variations dominate climate variations on all time scale;
  • While natural variations are important, the human influence is significant and involves a diverse range of first-order climate forcings (including, but not limited to the human input of CO2);
  • The human influence is dominated by the emissions into the atmosphere of greenhouse gases, particularly carbon dioxide.

This question was orginally posed on the weblog

Three Climate Change Hypotheses – Only One Of Which Can Be True.

My postion is summarized in that weblog, as well as elsewhere; e.g. see

Pielke, R.A., 1998: Climate prediction as an initial value problem. Bull. Amer. Meteor. Soc., 79, 2743-2746.

Pielke Sr., R.A., 2008: A broader view of the role of humans in the climate system. Physics Today, 61, Vol. 11, 54-55.

Pielke Sr.,Roger A., 2008: A Broader View of the Role of Humans in the Climate System is Required In the Assessment of Costs and Benefits of Effective Climate Policy. Written Testimony for the Subcommittee on Energy and Air Quality of the Committee on Energy and Commerce Hearing “Climate Change: Costs of Inaction” – Honorable Rick Boucher, Chairman. June 26, 2008, Washington, DC., 52 pp.

with a detailed presentation in

Cotton, W.R. and R.A. Pielke, 2007: Human impacts on weather and climate, Cambridge University Press, 330 pp

and Chapter E in

Kabat, P., Claussen, M., Dirmeyer, P.A., J.H.C. Gash, L. Bravo de Guenni, M. Meybeck, R.A. Pielke Sr., C.J. Vorosmarty, R.W.A. Hutjes, and S. Lutkemeier, Editors, 2004: Vegetation, water, humans and the climate: A new perspective on an interactive system. Springer, Berlin, Global Change – The IGBP Series, 566 pp.

Since Steve Schneider is the Editor of the journal Climatic Change, he could publish a set of review papers which summarize the scientific evidence with respect to this issue.  He has used this mechanism before in his two paper series with Mike MacCracken and I;

Pielke Sr., R.A., 2002: Overlooked issues in the U.S. National Climate and IPCC assessments. Climatic Change, 52, 1-11.

MacCracken, M., 2002: Do the uncertainty ranges in the IPCC and U.S. National Assessments account adequately for possibly overlooked climatic influences. Climatic Change, 52, 13-23.

I encourage Steve to again use this venue to constructively advance the discussion of climate science.



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