PHYSICAL NATURE OF SOME FLUCTUATIONS IN THE SPEED OF THE ZONAL CIRCULATION

(Paper presented 27 December 1946 at the Annual Meeting, A.M.S., Cambridge, Massachusetts)

Jerome Namias U. S. Weather Bureau

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Abstract

New data are presented showing the interrelation of temperature and pressure fields in the mid-troposphere. This interrelation is sufficiently close to suggest a physical line of attack on the problem of fluctuations in the speed of the zonal circulation. A special case of frequent occurrence is described wherein increases in zonal speed result from large-scale confluence of cold and warm currents in mid-troposphere.

Abstract

New data are presented showing the interrelation of temperature and pressure fields in the mid-troposphere. This interrelation is sufficiently close to suggest a physical line of attack on the problem of fluctuations in the speed of the zonal circulation. A special case of frequent occurrence is described wherein increases in zonal speed result from large-scale confluence of cold and warm currents in mid-troposphere.

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