TY - JOUR
T1 - Millennial-scale precipitation changes in southern Brazil over the past 90,000 years
AU - Wang, Xianfeng
AU - Auler, Augusto S.
AU - Edwards, R. L.
AU - Cheng, Hai
AU - Ito, Emi
AU - Wang, Yongjin
AU - Kong, Xinggong
AU - Solheid, Maniko
PY - 2007/12/16
Y1 - 2007/12/16
N2 - A U-Th dated 90,000 year-long speleothem oxygen isotope record from southern Brazil anti-correlates remarkably with the cave calcite records from eastern China, but positively correlates with the speleothem record from northeastern Brazil, suggesting an interhemispheric anti-phasing of rainfall on both millennial and orbital timescales, likely related to displacement in the mean position of the intertropical convergence zone and associated asymmetry in Hadley circulation. The phase relationships among these records are consistent with the hypothesis that abrupt climate events during the last glacial period are triggered by oceanic circulation changes in the high latitudes and enhanced by tropical feedbacks.
AB - A U-Th dated 90,000 year-long speleothem oxygen isotope record from southern Brazil anti-correlates remarkably with the cave calcite records from eastern China, but positively correlates with the speleothem record from northeastern Brazil, suggesting an interhemispheric anti-phasing of rainfall on both millennial and orbital timescales, likely related to displacement in the mean position of the intertropical convergence zone and associated asymmetry in Hadley circulation. The phase relationships among these records are consistent with the hypothesis that abrupt climate events during the last glacial period are triggered by oceanic circulation changes in the high latitudes and enhanced by tropical feedbacks.
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U2 - 10.1029/2007GL031149
DO - 10.1029/2007GL031149
M3 - Article
AN - SCOPUS:39049112396
SN - 0094-8276
VL - 34
JO - Geophysical Research Letters
JF - Geophysical Research Letters
IS - 23
M1 - L23701
ER -