Easterly wave activity in the Intra Americas Seas region analyzed with vertically integrated moisture fluxes

Introduction: Easterly waves (EWs) are a dominant atmospheric phenomenon in the tropics. EWs Mexico, Central America and Caribbean region produce intense precipitation significantly contribute to summer rainy season, but some climatologies indicate their activity is weak or even null over Intra-Americas Seas (IAS). As it shown present study, EW IAS not negligible its variability less than that off western coast of Africa. Method: Given well-known coupling wind moisture EWs, characteristics may be described using vertically integrated fluxes (VIMF) divergence. By means Hovmöller diagrams, lagged correlations composite analyses, propagation meteorological effects these across Sea Gulf particularly on rains, examined. Results: It observed as propagate, VIMF convergence increases level precipitable water which frequently results events. High frequency meridional component used estimate activity. Over Sea, energetic eastern tropical Atlantic while number regions comparable. Discussion: When Low-Level Jet (CLLJ) strong, tends diminish due decrease (PW), sea surface temperature (SST) Caribbean, possibly an intensified vertical shear. Therefore, years stronger normal CLLJ tend result below most southern Mexico.