Póster de la ponencia presentada en el XII CONGREMET del 26 al 29 de mayo de 2015 en la ciudad de Mar del Plata, Argentina.Climate variability on multiple scales has a large impact on the humid and sub-humid regions of Argentina. We characterized multi-decadal precipitation changes in this region over the last 100 years (1911-2011). We used the state-of-the-art Ensemble Empirical Mode Decomposition (EEMD) to partition rainfall time series into diferent frequency and amplitude components.