Abstract

GUTIERREZ-RIVERA, Marlin; CARNESOLTAS-CALVO, Mario  and  VARELA-DE LA ROSA, Alis. Physical - meteorological factors in the middle tropospheric levels that determinate the occurrence of downbursts in Cuba. Rev. Cubana Met. [online]. 2020, vol.26, n.4  Epub Dec 01, 2020. ISSN 2664-0880.

The aerovalanchas, as it is called in Cuba to the english term "downburst", are considered as one of the manifestations of local severity. In extreme cases they can cause considerable damage to the economy and society in general. That is why its forecast becomes extremely important for meteorological science and hence numerous investigations are carried out on the subject. However, despite all the efforts that have been carried out, the multiplicity of factors involved in their generation and development, as well as their complexity, prevent it from being known, which elements discriminate when it occurs and when not this severe event. Therefore, the objective of this research was to determine the physical - meteorological factors in the middle troposphere that discriminate the occurrence of the aeroavalanchas, thus contributing to the elaboration of their future forecast. After a rigorous case selection, the compliance of each factor was verified for real cases of aeroavalanchas and thunderstorms without severity, by calculating physical variables. The most relevant results are attributed to the existence of a dry layer at medium levels and the absorption of latent heat by evaporation and fusion.

Keywords : Downburst; Downdraft; Severe Local Storm.

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