On the basis of generalization of much statistical material, the periodicity of atmospheric circulation is studied in various regions of the terrestrial globe at three basic isobaric surfaces (10, 30, and 500 mbar). It is shown that zonal circulation varies with a period of 27 days at the 10- and 30-mbar levels and with a period of 25 days at all the levels investigated. An attempt is made to explain a series of the results obtained on the basis of the hypothesis of solar action on the atmospheric circulation and also taking account of the superposition of oscillations.
Faculty of Physics, Moscow State University, Leninskie Gory, Moscow, 119992, Russia
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