Atmospheric circulation and rainy days during significant drought events in western Cuba

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Published: Sep 1, 2017
Keywords:
drought, geopotential, Omega, relative humidity, trough, days with rain

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Iongel Durán Llacer
Facultad de Ciencias Ambientales (FCA) y centro EULA, Universidad de Concepción

Abstract

The climatic trends observed in Mesoamerica and the Caribbean in the last decades, associated to the increase of climatic variability and climate change show the increase of the frequency and intensity of the drought, reason why their effective knowledge is essential for the reduction the risks that are associated. In Cuba there is a close link between the development of significant drought events and the establishment of a persistent influence of strong anticyclonic systems on the area, unfavorable for the development of rains. The study of this multi-causal phenomenon is a very important endeavor, as is the deficit of days with rain in dry periods and their relation with the atmospheric conditions related to the drought. Was examined for the region, the behavior geopotential surfaces in different tropospheric levels, the magnitudes of the vertical movements represented by the Omega variable, gradations of longwave radiation (OLR), the surface of relative humidity and the presence of the medium level trough in the month of june, associated with the days with rain expressed in deciles rank. The data comes from the Earth System Research Laboratory (ESRL) of the National Oceanic and Atmospheric Administration (NOAA). The results confirmed that the establishment of strong positive anomalies in dominant anticyclonic systems, revealed by the characteristics of the studied climatological variables, limited the convection and the moisture content, which prevented a normal presence of rainy days, resulting closely related to significant periods of drought.

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How to Cite
LlacerI. D. (2017). Atmospheric circulation and rainy days during significant drought events in western Cuba. Revista Cubana De Meteorología, 23(3), 349-362. Retrieved from http://rcm.insmet.cu/index.php/rcm/article/view/251
Issue
Vol 23 No 3 (2017): Especial
Section
Original Articles

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