Resumen

CASTILLO, Rodrigo; NIETO, Raquel; GIMENO, Luis  y  DRUMOND, Anita. Influence of the main Annular Hemispheric Modes and ENSO on Mesoamerica's global moisture sources. Rev. acad. colomb. cienc. exact. fis. nat. [online]. 2019, vol.43, n.169, pp.746-763. ISSN 0370-3908.  https://doi.org/10.18257/raccefyn.859.

The influence of the interannual large-scale atmospheric oscillations in the uptake and moisture transport from the major oceanic moisture sources with impact over Mesoamerica is investigated herein using a sophisticated Lagrangian approach informed by ERA-Interim reanalysis data (1979-2012), which showed how the moisture sinks changes associated with the evaporation sources reproduce the well-known atmospheric systems variation patterns and the regional precipitation linked to El Niño-Southern Oscillation and the Arctic Oscillation. However, the most important result, not revealed before for the Mesoamerican region, is the Antarctic Oscillation teleconnection, which highlights a stronger statistical correlation with the Pacific moisture transport during the dry season and a little weaker correlation during the rainy season. These results may be used as predictors for the precipitation distribution behavior, mainly during its onset period and for its first maximum.

Palabras clave : Antarctic Oscillation (AAO); Artic Oscillation (AO); ENSO; Mesoamerica; moisture transport; FLEXPART.

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