Sunday, March 18, 2007
11 a.m. in Hollywood only   

     Global warming is definitely happening, according to Prof. Andrew P. Ingersoll of the California Institute of Technology. How much damage it will cause is hard to determine.

     The predictions of the magnitude and rate of global warming haven't changed much over the past 40 years, according to Ingersoll, but now the models are much better and the signal is emerging from the noise of natural climate variability. Will we shift from oil to coal and go on adding carbon dioxide to the atmosphere, or can we conserve energy and slowly convert to renewable resources? Motivating nations to cooperate on this task is also part of the challenge.

     Prof. Ingersoll, who is the Earle C. Anthony Professor of Planetary Science at Caltech, earned his Ph.D. in atmospheric physics from Harvard University in 1966. He has been at Caltech since then, participating in space missions to explore the planets and learn about weather and climate in a larger context. He was awarded NASA's Exceptional Scientific Achievement Medal and is a Fellow of the American Academy of Arts and Sciences, the American Association for the Advancement of Science, the American Geophysical Union, and the American Astronomical Society.

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