Dynamics of Precipitation Anomalies in Tropical South America

In this study, precipitation in Tropical South America the 1931–2016 period is investigated by means of Principal Component Analysis and composite analysis circulation fields. The associated dynamics are analyzed using 20th century ERA-20C reanalysis. It found that main climatic processes related to anomalies are: (1) intensity position Atlantic Convergence Zone (SACZ); (2) El Niño Southern Oscillation (ENSO); (3) meridional Intertropical (ITCZ), which be Sea Surface Temperature (SST) anomalies; (4) strength American Monsoon System, especially Low-Level Jet (SALLJ). Interestingly, all operate from Ocean, except for ENSO. Results present study agreement with state art literature about region. However, added longer dataset larger area improves knowledge gives new insights into how climate variability resulting America.