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1. - Introduction.

One of the forms of influence of the stratospheric aerosols SA, especially, those of volcanic origin, of exercising marked influence on the weather and the climate, it is through the feedback. Such it is the case of the chemical reactions with present compound in the stratosphere. They favor the destruction of the ozone (Brasseur, 1992), the increase of sinks of CO2 in the ocean and the terrestrial surface, as well as on the regional scale circulation (Graff et al., 1994, Handler, 1986, 1987, 1989). Precisely in this field is in which we have guided our investigation.

The atmospheric circulation is one of the essential factors in the conformation of weather and climate. In the region from Cuba in particular and of the Great Caribbean in general, it finds its synoptic representative travelers more systematical in the Tropical Cyclones (TC), the Cold Fronts (CF) and the Easterly Waves (EW). They define the main rates of rain, temperature, winds and other meteorological variables. Would it be possible to wonder Exists any stable relationship between the occurrence of the explosive volcanic eruptions EVE and the behavior of those synoptic systems, that allows to organize a strategy for the reduction of their impacts? At least in the aspects that related to the frequency of such systems, we would try to answer in the development of this paper, for which we will use several physical statistical techniques of analysis of chronological series.