Synoptic patterns associated with the seasonal behavior of cold fronts in Cuba
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Abstract
The present investigation consists of a climatological and synoptic study on the cold fronts that affected Cuba in the seasons between 1950 – 1951 and 2014 – 2015, grouped in the quarters October – November – December and January – February – March; these systems were stratified according to their classification in types and intensities, which contributes to the development of a seasonal forecasting method for the winter season. The synoptic patterns of the different variables studied (sea level pressure, geopotential height at different levels of the troposphere, wind field at low, medium and high levels and the thermal field at 850 hPa level) were obtained, grouped according to the impact of cold fronts on the Cuban archipelago in the selected quarters. The significant elements between these tropospheric patterns were also determined through the statistical parameter Z, which would allow them to be differentiated. In the case of classic cold fronts, a greater frequency is evident and the results are closely related to similar studies of extratropical cyclone; the reverse fronts presented a different behavior, where the patterns point to favor a better structure of the high migratory pressures. On the other hand, the frequency of the secondary and strong fronts is greater in the quarters of low behavior, and the weak and moderate fronts appear similar to the classic fronts in general.
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