On the glacial-interglacial variability of the Asian monsoon in speleothem δ18O records

被引：73
|
作者：
Liu, G. [1 ,2 ,3 ]
Li, X. [4 ]
Chiang, H-W [2 ]
Cheng, H. [4 ]
Yuan, S. [1 ,2 ,3 ]
Chawchai, S. [5 ]
He, S. [2 ]
Lu, Y. [2 ]
Aung, L. T. [2 ,6 ]
Maung, P. M. [2 ,7 ]
Tun, W. N. [6 ]
Oo, K. M. [7 ]
Wang, X. [2 ,3 ]
机构：
[1] Nanyang Technol Univ, Interdisciplinary Grad Sch, Singapore 639798, Singapore
[2] Nanyang Technol Univ, Earth Observ Singapore, Singapore 639798, Singapore
[3] Nanyang Technol Univ, Asian Sch Environm, Singapore 639798, Singapore
[4] Xi An Jiao Tong Univ, Inst Global Environm Change, Xian 710049, Peoples R China
[5] Chulalongkorn Univ, Dept Geol, Bangkok 10330, Thailand
[6] Myanmar Earthquake Comm, Yangon 11052, Myanmar
[7] Dept Meteorol & Hydrol, Nay Pyi Taw 15011, Myanmar
来源：
SCIENCE ADVANCES | 2020年 / 6卷 / 07期
基金：
新加坡国家研究基金会;
关键词：
WATER-VAPOR; RELATIVE-HUMIDITY; DEUTERIUM EXCESS; HIGH-RESOLUTION; SUMMER MONSOON; ICE CORE; ISOTOPIC COMPOSITION; HYDROGEN ISOTOPES; SOLAR-RADIATION; INDIAN MONSOON;
D O I：
10.1126/sciadv.aay8189
中图分类号：
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号：
07 ; 0710 ; 09 ;
摘要：
While Asian monsoon (AM) changes have been clearly captured in Chinese speleothem oxygen isotope (delta O-18) records, the lack of glacial-interglacial variability in the records remains puzzling. Here, we report speleothem delta O-18 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.
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页数：10
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