By Larry Kummer. From the Fabius Maximus website

Summary: An eminent European climate scientist discusses climate threats, myths, and fears. All are dangerous.

“It is the mark of an educated man to look for precision in each class of things just so far as the nature of the subject admits …” — Aristotle in The Nicomachean Ethics .

This is post #430 on the FM website about climate change, a long series giving different perspectives on the threat and the public policy debate about ways to respond. This presentation is by an eminent professor with long experience in both climate science and climate models. It gives one expert’s answers to key questions in the debate about the best public policy response to climate change, and points to the key questions that must be answered to make sound policy. Amidst all the noise, this deserves your attention.

A presentation at an invited seminar by Dr. Demetris Koutsoyiannis.

Given at WasserCluster Lunz on 20 April 2017.

He is a Professor of Hydrology & Hydrosystems in the School of Civil Engineering

at the National Technical University of Athens (NTUA).

Posted with his generous permission.

About the seminar’s host: WasserCluster Lunz

WasserCluster Lunz is a nonprofit research center in Austria. It is jointly run by the University of Vienna, the Danube University Krems, and the University of Natural Resources and Life Sciences Vienna (BOKU Vienna). It is financially supported by the Provincial Government of Lower Austria and the Municipality of Vienna. See their website.

About the author: Demetris Koutsoyiannis

Demetris Koutsoyiannis is professor of Hydrology and Analysis of Hydrosystems in the National Technical University of Athens, Dean of the School of Civil Engineering, Head of the Laboratory of Hydrology and Water Resources Development, and former Head of the Department of Water Resources and Environmental Engineering.

He is also Co-Editor of Hydrological Sciences Journal and member of the editorial board of Hydrology and Earth System Sciences (and formerly of Journal of Hydrology and Water Resources Research).

He has been awarded the International Hydrology Prize, the Dooge medal (2014) by the International Association of Hydrological Sciences with the UNESCO and the World Meteorological Organization, and the Henry Darcy Medal (2009) by the European Geosciences Union. His distinctions include the Lorenz Lecture of the American Geophysical Union (2014) and the Union Plenary Lecture of the International Union of Geodesy and Geophysics (2011).

See his page at the NTUA website, with his C.V., publications, and his opinions about key questions in his field.

Some of his work about climate change.

See his participation in the 2014 Climate Dialogue debate about How persistent is the climate and what is its implication for the significance of trends?

Among his papers is one of special note: “On the credibility of climate predictions” by Demetris Koutsoyiannis et al. in Hydrological Sciences Journal, August 2008 — Abstract…

Geographically distributed predictions of future climate, obtained through climate models, are widely used in hydrology and many other disciplines, typically without assessing their reliability. Here we compare the output of various models to temperature and precipitation observations from eight stations with long (over 100 years) records from around the globe. The results show that models perform poorly, even at a climatic (30-year) scale. Thus local model projections cannot be credible, whereas a common argument that models can perform better at larger spatial scales is unsupported.

For a less-technical discussion of this article and its significance, see “Koutsoyiannis et al 2008: On the credibility of climate predictions“ by Steve McIntyre at Climate Audit — “Par Frank observes: ‘In essence, they found that climate models have no predictive value.’” Also, I recommend reading this comment by Koutsoyiannis about the difficulty of getting non-consensus papers published in climate science.

For More Information

For more information about this vital issue see the keys to understanding climate change, about computer models, about extreme weather, and especially these …

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