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- W2183450168 abstract "Annual rainfall distribution in tropical America depends on the ITC zone, affected by factors such as Andes Mountain, tropical Pacific and Atlantic Oceans and local convergence areas. Studies have showed correlation between the ENSO Phases and hydrologic anomalies in the region. In Venezuela ENSO effects are reflected as climatic anomalies with magnitudes varying within the areas. This paper deals with the study of the effects of El Nino phenomena on the climatic variables in Venezuela. Variables affected directly by El Nino are rainfall, temperature and flows. Indirectly consequences are associated with an increase of diseases such Malaria, Dengue and Cholera. ENSO phenomena create anomalies in Hadley cells over Venezuela originating negative anomalies for rainfall during El Nino years and positive rainfall anomalies during La Nina events. Results of correlations between this anomalies and SSTA-3/4 have show negative rainfall anomalies between 8 and 20 % and positive anomalies of 14 to 30 %, depending on the region. About 85 % of ENSO years coincide with rainfall deficits bigger than 35 %. Temperature values are less sensitive to the occurrence of El Nino, varying the magnitude of the anomalies between 0.5 0 C to 1 0 C, high enough to increase the transmission of Dengue in a rate of 100 %. Malaria mortality and mobility increases in 37 % the year after an El Nino event. The relationship between ENSO 3/4 Indices and flow anomalies of Caroni River shows that the join occurrence of atmospheric and oceanic events exercise the biggest influence on the occurrence of flow anomalies in this basin. During the cold El Nino period in the Pacific (La Nina) flows in Caroni basin diminish affecting the storage and level of operation of Guri reservoir and the production of hydro electrical energy. In fact, 12 from the 15 El Nino events that happened during the analyzed period of flows (1950-2004) coincide with years in which mean annual flow is far smaller than the historical mean. Keywords: Climatic anomalies; ENSO in Venezuela; effect of El Nino in Venezuela; influence of ENSO on the Climate of Venezuela; effects of tele-connections." @default.
- W2183450168 created "2016-06-24" @default.
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- W2183450168 date "2006-01-01" @default.
- W2183450168 modified "2023-09-27" @default.
- W2183450168 title "The Influence of El Niño Phenomenon on the Climate of Venezuela" @default.
- W2183450168 hasPublicationYear "2006" @default.
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