期刊
QUATERNARY RESEARCH
卷 75, 期 1, 页码 104-113出版社
CAMBRIDGE UNIV PRESS
DOI: 10.1016/j.yqres.2010.09.002
关键词
Stalagmite; Mexico; Holocene climate variability; Oxygen isotopes; ITCZ. ENSO
资金
- CONACYT [44,016]
- PAPIIT [IN 116,906]
- ARC Centre of Excellence
A paleoclimate reconstruction for the Holocene based upon variations of delta O-18 in a U-Th dated stalagmite from southwestern Mexico is presented. Our results indicate that the arrival of moisture to the area has been strongly linked to the input of glacial meltwaters into the North Atlantic throughout the Holocene. The record also suggests a complex interplay between Caribbean and Pacific moisture sources, modulated by the North Atlantic SST and the position of the ITCZ, where Pacific moisture becomes increasingly more influential through ENSO since similar to 4.3 ka. The interruption of stalagmite growth during the largest climatic anomalies of the Holocene (10.3 and 8.2 ka) is evidenced by the presence of hiatuses, which suggest a severe disruption in the arrival of moisture to the area. The delta O-18 record presented here has important implications for understanding the evolution of the North American Monsoon and climate in southwestern Mexico, as it represents one of the most detailed archives of climate variability for the area spanning most of the Holocene. (C) 2010 University of Washington. Published by Elsevier Inc. All rights reserved.
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