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Title: On the glacial-interglacial variability of the Asian monsoon in speleothem δ18O records
Authors: Liu, Guangxin
Li, X.
Chiang, Hong-Wei
Cheng, H.
Yuan, S.
Chawchai, S.
He, S.
Lu, Yanbin
Aung, Lin Thu
Maung, P. M.
Tun, W. N.
Oo, K. M.
Wang, Xianfeng
Keywords: Engineering::Environmental engineering
Issue Date: 2020
Source: Liu, G., Li, X., Chiang, H.-W., Cheng, H., Yuan, S., Chawchai, S., . . . Wang, X. (2020). On the glacial-interglacial variability of the Asian monsoon in speleothem δ18O records. Science Advances, 6(7), eaay8189-. doi:10.1126/sciadv.aay8189
Journal: Science Advances
Abstract: While Asian monsoon (AM) changes have been clearly captured in Chinese speleothem oxygen isotope (δ18O) records, the lack of glacial-interglacial variability in the records remains puzzling. Here, we report speleothem δ18O records from three locations along the trajectory of the Indian summer monsoon (ISM), a major branch of the AM, and characterize AM rainfall over the past 180,000 years. We have found that the records close to the monsoon moisture source show large glacial-interglacial variability, which then decreases landward. These changes likely reflect a stronger oxygen isotope fractionation associated with progressive rainout of AM moisture during glacial periods, possibly due to a larger temperature gradient and suppressed plant transpiration. We term this effect, which counteracts the forcing of glacial boundary conditions, the moisture transport pathway effect.
ISSN: 2375-2548
DOI: 10.1126/sciadv.aay8189
Rights: © 2020 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).
Fulltext Permission: open
Fulltext Availability: With Fulltext
Appears in Collections:IGS Journal Articles

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