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Lonnie Thompson is University Distinguished Professor at Ohio State University in the School of Earth Sciences and the Byrd Polar Research Center. He is the leading paleo-scientist who drilled and preserved ice cores from high mountain glaciers while others focussed on Greenland and Antarctica.
In 1952 the Danish geophysicist Willi Dansgaard made a discovery that opened up a completely new field of research. He found that the amount of heavy oxygen isotopes in rain correlates with the temperature at the location where the precipitation was formed. But more important in preparation for debates with climate change deniers is the record of CO2 that is also preserved in the ice cores. The correlation of temperature rise and [ . . . ]