Resumo

MITRANI-ARENAL, Ida; CABRALES-INFANTE, Javier  e  ALONSO-DIAZ, Yoandy. Valuation of the ocean circulation influence and the Southamerican river discharged on the cyclone activity, using the HYCOM re-analysis. Rev. Cubana Met. [online]. 2020, vol.26, n.4  Epub 01-Dez-2020. ISSN 2664-0880.

An analysis of the oceanic circulation on the Caribbean and Tropical North Atlantic areas (5-25 oN and 45-95 oW) is presented, using the HYCOM model re-analysis inputs and taking as study cases, the tropical cyclone seasons of 2005 (very active), 2009 (weak) and 2013 (medium). The behavior of the principal oceanographic variables (water temperature, salinity and streams) is analyzed, from the surface to the 1500 m depth. The time-space evolution and peculiarities of those variables are described, with special attention to presence of the cyclonic and anti-cyclonic eddies inside the Caribbean Sea. Is is observed that the water circulation and the thermohaline structure behavior are in correspondence with the fresh water discharges from the Amazonian Basin and, in lest measure, from the Orinoco ones, principally depending of the rainfall regimes over the central zone of the Amazonian Basin. The obtained results show that the activity of the analyzed cyclonic seasons were intense affected by the surface thermohaline circulation, son it is recommended that this fact will take into account to make the habitual forecast of the tropical cyclone season.

Palavras-chave : ocean circulation; cyclone activity; thermohalina structure; Southamerican rivers.

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