Abrupt climatic events in Northeast Brazil detected in Bat Guano and speleothems records over the last 2,000 years - Utida, Giselle; Etourneau, Johan; Sifeddine, A.; Bouloubassi, Ioanna; Schefuß, Enno; Martinez, P; Wang, Hong; Oliveira, Sonia Maria Barros de; Pessenda, Luiz Carlos Ruiz; Sawakuchi, André Oliveira; Cruz, Francisco W (Symposium, Climate change and human impact in Central and South America over the last 2000 years: Observations and models, 2014)