High-resolution absolute-dated Indian monsoon record between 53 and 36 ka from Xiaobailong Cave, southwestern China

The oxygen isotopic record of stalagmite XBL-1 from southwestern China reveals millennial-scale variability of the Indian Monsoon between 53 and 36 ka, synchronous with changes in the East Asian Monsoon recorded at Hulu Cave and similar to Dansgaard-Oeschger cycles recorded in Greenland ice. Our rec...

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Bibliographic Details
Published in:Geology (Boulder) 2006-08, Vol.34 (8), p.621-624
Main Authors: Cai Yanjun, Cai Yanjun, An Zhisheng, An Zhisheng, Cheng, Hai, Edwards, R. Lawrence, Kelly, Megan J, Liu Weiguo, Liu Weiguo, Wang, Xianfeng, Shen, Chuan-Chou
Format: Article
Language:English
Subjects:
absolute age
Antarctica
Arctic region
Asia
cave environment
Caves
Cenozoic
China
chronology
Climate
climate change
correlation
dates
Far East
geochemistry
Geochronology
GISP2
Greenland
Greenland ice sheet
GRIP
Heinrich events
high-resolution methods
Ice
India
Indian Peninsula
interstadial environment
isotope ratios
Isotopes
millenial variations
monsoons
O-18/O-16
oxygen
paleoclimatology
Pleistocene
Quaternary
Quaternary geology
Rain
solution features
southwestern China
speleothems
stable isotopes
stalagmites
terrestrial environment
upper Pleistocene
uranium disequilibrium
Xiaobailong Cave
Yunnan China
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Summary:The oxygen isotopic record of stalagmite XBL-1 from southwestern China reveals millennial-scale variability of the Indian Monsoon between 53 and 36 ka, synchronous with changes in the East Asian Monsoon recorded at Hulu Cave and similar to Dansgaard-Oeschger cycles recorded in Greenland ice. Our record, in general, confirms the chronology of Hulu Cave. If our correlations between Greenland and the Xiaobailong Cave record are correct, both the Greenland Ice Sheet Project 2 and Greenland Ice Core Project (ss09sea) chronologies are accurate within quoted errors. A dry interval that we correlate with Heinrich Event 5 (H5) and the Greenland stadial preceding Greenland Interstadial 12 (GIS 12) is centered ca. 48.0 ka and a shift to drier conditions, correlated to the end of GIS 12, is ca. 43.5 ka. Overall, the variability of the Indian Monsoon, from XBL-1 data, on millennial scales is similar to and correlated with high-latitude ice core records from the Northern Hemisphere. However, some Indian Monsoon characteristics more closely resemble, but are anticorrelated with, features in the Antarctic record, suggesting some link to climate of the high southern latitudes, in addition to the clear link to the climate of the high northern latitudes.
ISSN:0091-7613
1943-2682
DOI:10.1130/G22567.1