ATMOSPHERIC CIRCULATION AND TROPICAL CYCLOGENESIS IN THE SOUTHERN HEMISPHERE IN JANUARY—MARCH 2001

T. S. Kruzhkova, T. G. Ivanidze, and M. Ye. Makarova

The paper describes atmospheric circulation features and tropical cyclogenesis over the Southern Hemisphere oceans in summer (January—March) of 2001, when the number of tropical cyclones was well below normal or they did not occur at all (January 2001, the Pacific). Based on analysis of the Kats atmospheric circulation indices and mean monthly sea-level and midtropospheric pressure and pressure anomaly fields it can be stated that circulation processes suppressing or intensifying cyclonic activity in the tropics have a complex structure, and there does not seem to be a single scheme of global atmospheric circulation explaining tropical cyclogenesis.