Jacob Bjerknes

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Bjerknes, Jacob


Born Nov. 2, 1897, in Stockholm. Norwegian meteorologist. Son of V. F. K. Bjerknes.

Bjerknes graduated from the University of Oslo in 1924. From 1918 to 1920 he worked in the weather service in Bergen, and from 1920 to 1931 in Switzerland. From 1931 to 1939 he was a professor at the University of Bergen. In 1940 he became a professor at the University of California. Bjerknes made basic studies of the structure of atmospheric fronts and their connection with precipitation, discovered the structure of cyclones, explained them in terms of waves on atmospheric fronts, and clarified the role of cyclonic activity in the general circulation of the atmosphere. His later works are devoted to the problem of the influence of the ocean on the circulation of the atmosphere and climate.


Meteorological Conditions for the Formation of Rain. Kristiania, 1921. (Together with H. Solberg.)
“Theorie der auss ertropischen Zyklonenbildung.” Meteorologische Zeitschrift, 1937, vol. 54, p. 462.
“On the Theory of Cyclones.” Journal of Meteorology, 1944, vol. 1, p. 1.
References in periodicals archive ?
The relatively dense observing network it established led remarkably quickly to development of the "polar front model," set out in Vilhelm's son Jacob Bjerknes classic 1919 paper "On the Structure of Moving Cyclones." Of course, we largely take such conceptual models for granted today, but Fleming's research describes contemporary rival theories and their progenitors in some detail; it took two decades of sometimes heated resistance and conservatism for the Bergen methods of airmass and frontal analysis to become accepted practice in both the United Kingdom and the United States.
In the 1960s, the late Norwegian meteorologist Jacob Bjerknes found hints of traveling temperature anomalies in the Atlantic, and other researchers later detected similar isolated examples.
Many years later, Gene recalled being chided by the widow of the famous Jacob Bjerknes for not changing the spelling back to Rasmussen.
About a decade earlier, Jacob Bjerknes had postulated the existence of a physical linkage between El Nino in the equatorial eastern Pacific Ocean and the planetary-scale Southern Oscillation in the atmospheric sea level pressure field discovered by Sir Gilbert Walker 50 years earlier.