THE TRANSITION SEASONS IN CLIMATE DYNAMIC S

The modeling experiments are described with prescribed seasurface temp erature distributions of the two different transition seasons (autumn, spring) and abnormal (weather) conditions tuned to climatic changes. Special attention is paid to the analysis of the zonal ten days mean p recipitations over the continents and oceans, large-scale and convecti ve precipitations and snow falls. The suggestion is made that the autu mn seasonal cooling of the atmosphere may develop within the regime of the ''hemispherical cooling'' characterized by low and high latitude interactions as well as within the anomalous regime without such inter actions due to specific hemispherical (meridional) distribution of the sea-surface temperature. The spring seasonal warming of the atmospher e may develop within the regime of the ''hemispheric warming'' without the low and high latitude interactions as well as within the regime w ith such interactions.