Klaus Hasselmann

The BBVA Foundation Frontiers of Knowledge Award in the Climate Change category goes in this second edition to German physicist and mathematician Klaus Hasselmann (Hamburg, 1931) for developing methods which established that recent global warming trends are primarily attributable to human activities.

Prof. Hasselmann’s research “has crucially advanced the frontiers of scientific and public understanding of climate change”, in the words of the jury’s citation. Of his multiple achievements, the jury singled out the development of the method known as “fingerprinting”, which is able to discriminate between natural contributions to climate change and the perturbations caused by the accumulation of atmospheric greenhouse gases.

“This landmark research overcame the prior difficulty of distinguishing human impact” in observed climate change, in the opinion of the jury. Thanks to Hasselmann’s method, the United Nations Intergovernmental Panel on Climate Change (IPCC) could commit to paper in its 4th report (2007) that climate change was attributable to human factors.

The models developed by Klaus Hasselmann draw equally on his fine mathematical skills and a deep understanding of the properties of the atmosphere-ocean-land system.

“The prize has been awarded to me for my work on developing climate models, but also for demonstrating that observed climate change can be attributed with a high degree of certainty to human impact. We have been able to demonstrate with the data at hand that human action is changing our climate, and this is an important scientific breakthrough. So I am very pleased it has been recognized. Everybody now understands that we are in danger from climate change,” were Hasselmann’s first remarks on hearing he had won the 2009 BBVA Foundation Frontiers of Knowledge Award in Climate Change.

On the subject of the recent Copenhagen summit he is frankly pessimistic: Copenhagen was a disappointment, a typical example of individual countries pursuing their own interest and not perceiving that they have a common problem to solve”. The failure of the summit means we must now resign ourselves, “unless new measures are forthcoming”, to the fact that average global temperature will rise by at least two degrees.

Despite this, Hasselmann claims that “the problem is solvable”. The key is to promote the use of renewable energies “with existing technology”, and for politicians to take decisions that help reorientate the economy. Mitigating climate change “is not expensive, and if we implement the right policies, can be done without major changes in our way of life”. For the Frontiers laureate, the biggest obstacle is political inaction.

Klaus Hasselmann is currently Emeritus Director of the Max Planck Institute for Meteorology, in Hamburg (Germany), which he founded in 1975 and led for 25 years. From 1961 to 1972 he carried out research at the University of Hamburg and, in the United States, at the Scripps Institution of Oceanography and the Woods Hole Oceanographic Laboratory. From 1988 to 1999 he was Scientific Director at the German Climate Computer Centre, in Hamburg. He is a founding member of the European Climate Forum, promoting multidisciplinary research on climate change.

International jury

The jury in this second edition was chaired by Edward S. Rubin (Professor of Engineering and Public Policy at Carnegie Mellon University, United States) and formed by other international experts in climate change related areas: Hans J. Schellnhuber (Director of the Potsdam Institute for Climate Impact Research, Germany), Bjorn Stevens (Director of the Max Planck Institute for Meteorology, Germany), and Spaniards Carlos Duarte (Research Professor at the Mediterranean Institute for Advanced Studies, CSIC-University of the Balearic Islands) and Miquel Canals (Professor of Marine Geology at the University of Barcelona).