Jule Gregory Charney

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Jule Gregory Charney
Jule Gregory Charney.jpg
Born January 1, 1917
San Francisco, California
Died June 16, 1981(1981-06-16) (aged 64)
Boston, Massachusetts
Nationality Jewish
American
Fields Meteorology
Institutions Massachusetts Institute of Technology
Alma mater UCLA
Doctoral advisor Jørgen Holmboe
Doctoral students Inez Fung, Eugenia Kalnay, Joseph Pedlosky, Theodore Shepherd, Conway B. Leovy
Notable awards William Bowie Medal

Jule Gregory Charney (January 1, 1917 – June 16, 1981) was an American meteorologist who played an important role in developing weather prediction. He developed a set of equations (The Quasi-Geostrophic Vorticity Equation) for calculating the large-scale motions of planetary-scale waves. He gave the first convincing physical explanation for the development of mid-latitude cyclones known as the Baroclinic Instability theory. He is considered the father of modern dynamical meteorology.

Charney studied physics at UCLA where he completed his masters in 1940 and Ph.D. in 1946.

In the 1950s, he was involved in early research on numerical weather prediction together with John von Neumann at the Institute for Advanced Study (IAS) in Princeton, New Jersey. He and von Neumann brought over from England a recent Ph.D. in meteorological calculations, Bruce Gilchrist, to work on this task using the institute's computer, the IAS machine.[1] Their collective work paved the way for the founding of the Geophysical Fluid Dynamics Laboratory.

From 1956 until his death in 1981, Charney was a faculty member at the Massachusetts Institute of Technology.

In 1979 Charney chaired an "ad hoc study group on carbon dioxide and climate" for the National Research Council. The resulting 22-page report, "Carbon dioxide and climate: A scientific assessment", is one of the earliest modern scientific assessments about global warming. Its main conclusion can be found on page 2: "We estimate the most probable global warming for a doubling of CO2 to be near 3°C with a probable error of ± 1.5°C." This estimate of climate sensitivity has been essentially unchanged for over three decades, e.g., the IPCC Fourth Assessment Report (2007) says that "equilibrium climate sensitivity is likely to be in the range 2°C to 4.5°C, with a best estimate value of about 3°C. It is very unlikely to be less than 1.5°C. Values substantially higher than 4.5°C cannot be excluded, but agreement with observations is not as good for those values."

The American Meteorological Society presents an award named "The Jule G. Charney Award". The Award is granted to individuals "in recognition of highly significant research or development achievement in the atmospheric or hydrologic sciences".

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References[edit]

  1. ^ Gilchrist, Bruce, "Remembering Some Early Computers, 1948-1960", Columbia University EPIC, 2006, pp.7-9. (archived 2006) Contains some autobiographical material on Gilchrist's use of the IAS computer beginning in 1952.

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