Novello, V. F.
Cruz, F. W.
Moquet, J. S.
de Paula, M. S.
Edwards, R. L.
Strikis, N. M.
Campos, J. L. P. S.
Número total de Autores: 12
Afiliação do(s) autor(es):
 Univ Sao Paulo, Inst Geociencias, Sao Paulo - Brazil
 Inst Phys Globe Paris, Paris - France
 SUNY Albany, Dept Atmospher & Environm Sci, Albany, NY 12222 - USA
 Univ Minnesota, Dept Earth Sci, Minneapolis, MN - USA
 Xi An Jiao Tong Univ, Inst Global Environm Change, Xian, Shaanxi - Peoples R China
 Univ Fed Fluminense, Dept Geoquim, Niteroi, RJ - Brazil
 Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, Sao Paulo - Brazil
Número total de Afiliações: 7
Tipo de documento:
Geophysical Research Letters;
MAY 28 2018.
Citações Web of Science:
Most reconstructions of the South American Monsoon System (SAMS) over the last two millennia are based on delta O-18 records from locations at high-elevation sites in the Andes, which are not influenced by the South Atlantic Convergence Zone (SACZ). Yet the SACZ is a key driver of SAMS variability over much of Brazil. Here we use two new delta O-18 records from speleothems sampled in the central and southwestern portions of the SACZ core to show that the SAMS was not varying in phase over the entire tropical continent during the last two millennia. In fact, speleothem records located to the northeast of the SACZ record precipitation variations that are antiphased with similar records on the opposite side of the SACZ, in particular during the Little Ice Age period, while records close to the core of the SACZ axis show no significant departure from the mean state during this period. (AU)