Variability of stalagmite-inferred Indian monsoon precipitation over the past 252,000 y Article Swipe
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· 2015
· Open Access
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· DOI: https://doi.org/10.1073/pnas.1424035112
· OA: W2015252820
Significance This paper presents a new long speleothem δ 18 O time series from Xiaobailong cave in southwest China that characterizes changes in a major branch of Indian summer monsoon precipitation over the last 252 kyrs. This record shows not only 23-kyr precessional cycles punctuated by prominent millennial-scale weak monsoon events synchronous with Heinrich events in the North Atlantic, but also clear glacial–interglacial variations that are consistent with marine records but different from the cave records in East China. The speleothem records of Xiaobailong and other caves in East China show that the relationship between the Indian and the East Asian summer monsoon precipitation is not invariant, but rather varies on different timescales depending on the nature and magnitude of the climate forcing.
