Variability of stalagmite-inferred Indian monsoon precipitation over the past 252,000 y

Yanjun Cai; Inez Y. Fung; R. Lawrence Edwards; Zhisheng An; Hai Cheng; Jung Eun Lee; Liangcheng Tan; Chuan Chou Shen; Xianfeng Wang; Jesse A. Day; Weijian Zhou; Megan J. Kelly; John C H Chiang

doi:10.1073/pnas.1424035112

Variability of stalagmite-inferred Indian monsoon precipitation over the past 252,000 y

Yanjun Cai, Inez Y. Fung, R. Lawrence Edwards, Zhisheng An, Hai Cheng, Jung Eun Lee, Liangcheng Tan, Chuan Chou Shen, Xianfeng Wang, Jesse A. Day, Weijian Zhou, Megan J. Kelly, John C H Chiang

Earth and Environmental Sciences-Twin Cities

Research output: Contribution to journal › Article › peer-review

251 Scopus citations

Abstract

A speleothem δ¹⁸O record from Xiaobailong cave in southwest China characterizes changes in summer monsoon precipitation in Northeastern India, the Himalayan foothills, Bangladesh, and northern Indochina over the last 252 kyr. This record is dominated by 23-kyr precessional cycles punctuated by prominent millennial-scale oscillations that are synchronous with Heinrich events in the North Atlantic. It also shows clear glacial-interglacial variations that are consistent with marine and other terrestrial proxies but are different from the cave records in East China. Corroborated by isotope-enabled global circulation modeling, we hypothesize that this disparity reflects differing changes in atmospheric circulation and moisture trajectories associated with climate forcing as well as with associated topographic changes during glacial periods, in particular redistribution of air mass above the growing ice sheets and the exposure of the "land bridge" in the Maritime continents in the western equatorial Pacific.

Original language	English (US)
Pages (from-to)	2954-2959
Number of pages	6
Journal	Proceedings of the National Academy of Sciences of the United States of America
Volume	112
Issue number	10
DOIs	https://doi.org/10.1073/pnas.1424035112
State	Published - Mar 10 2015

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Publisher Copyright:
© 2015, National Academy of Sciences. All rights reserved.

Keywords

Indian summer monsoon
Precipitation glacial-interglacial
Stalagmite
δO

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Cai, Y., Fung, I. Y., Edwards, R. L., An, Z., Cheng, H., Lee, J. E., Tan, L., Shen, C. C., Wang, X., Day, J. A., Zhou, W., Kelly, M. J., & Chiang, J. C. H. (2015). Variability of stalagmite-inferred Indian monsoon precipitation over the past 252,000 y. Proceedings of the National Academy of Sciences of the United States of America, 112(10), 2954-2959. https://doi.org/10.1073/pnas.1424035112

Cai, Y, Fung, IY, Edwards, RL, An, Z, Cheng, H, Lee, JE, Tan, L, Shen, CC, Wang, X, Day, JA, Zhou, W, Kelly, MJ & Chiang, JCH 2015, 'Variability of stalagmite-inferred Indian monsoon precipitation over the past 252,000 y', Proceedings of the National Academy of Sciences of the United States of America, vol. 112, no. 10, pp. 2954-2959. https://doi.org/10.1073/pnas.1424035112

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Variability of stalagmite-inferred Indian monsoon precipitation over the past 252,000 y

Abstract

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Keywords

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