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On the basis of Tropical Rainfall Measuring Mission (TRMM) daily accumulated rainfall data (3B42 v7 product) covering 16 years (1998-2013), the Amazon Basin (AB) time and space rainfall variability is analysed. Different behaviours of precipitation over AB are found to the north and south of 8°S when the longitudinal band 70°-50°W is considered. The sample is then split into northern and southern sectors with respect to 8°S, describing their monthly evolution as a function of longitude. The main spatial oscillation modes are isolated and analysed through continuous wavelet transform analysis. Intense spatial oscillations are found close to the western side of the studied region. Several temporal modes in different scales are detected within each sample. Two of them show scales longer than 12 months, which are probably associated with ENSO phases. Smaller scale oscillations, evaluated from daily data, are also found. The northern sector of AB shows more daily data variability than the southern one and seems to be more affected by large temporal processes than the southern sector. Fil: Hierro, Rodrigo Federico. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad Austral. Facultad de Ingeniería; Argentina Fil: Llamedo Soria, Pablo Martin. Universidad Austral. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: de la Torre, Alejandro. Universidad Austral. Facultad de Ingeniería; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Alexander, Pedro Manfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Física de Buenos Aires. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Física de Buenos Aires; Argentina |
