Jacob Bjerknes, Norwegian meteorologist

Jacob Bjerknes, Norwegian meteorologist

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Credit: AMERICAN GEOPHYSICAL UNION/EMILIO SEGRE VISUAL ARCHIVES/AMERICAN INSTITUTE OF PHYSICS/SCIENCE PHOTO LIBRARY

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Caption: Jacob Aall Bonnevie Bjerknes (1897-1975), Norwegian meteorologist. Bjerknes, who was born in Sweden, was educated in Norway. Both his father and grandfather had been scientists, and Jacob worked with his father at the University of Bergen, from 1918. In 1919, Bjerknes published a landmark paper, On the structure of moving cyclones, describing weather systems known as extratropical cyclones. This work led to the development of long-range weather forecasting. In 1926, Bjerknes was the support meteorologist for Amundsen's airship flight over the North Pole. Bjerknes emigrated to the USA in 1940, working at UCLA, California, on early work with weather rockets and satellites. His many awards include the William Bowie Medal (1945).

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