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Abstract
The possible influence of the El Niño-Southern Oscillation (ENSO) phenomenon on the spatiotemporal variability of the precipitation in Colombia is analyzed considering precipitation records from rain gauge dataset during the period 1970-2015, as well as records from satellite datasets available for the period 1998 to present. Based on sea surface temperature indexes associated with the ENSO phenomenon, we evaluated seasonal rainfall anomalies for each type of ENSO event, as well as monthly simultaneous and lagged correlations between ENSO indexes and precipitation anomalies. Results from the satellite data showed that there was more precipitation during La Niña Modoki than during the Canonical La Niña events in most of the country for the December-February period, while there was a larger reduction of precipitation during the canonical events of El Niño than the Modoki events. The statistical significance of lagged correlations showed that there was an influence of the surface temperature anomalies over the eastern Pacific region on precipitation in Colombia for a lag of 0 up to 6 months. This paper provides new insights about variations of precipitation distribution and water availability in Colombia during the different phases of ENSO, which is important for the efficient management of water resources in the region. © 2019. Acad. Colomb. Cienc. Ex. Fis. Nat.
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