NDLI: Evolving history of the East Asian summer monsoon intensity during the MIS5: inconsistent records from Chinese stalagmites and loess deposits

Content Provider	Springer Nature Link
Author	Rao, Zhiguo Liu, Xiaokang Hua, Hui Gao, Yongli Chen, Fahu
Copyright Year	2014
Abstract	As an important component of the global monsoon system, the intensity of East Asian summer monsoon (EASM) influences lives and economic development of more than 2 billion people. The last interglacial period, also known as Marine Isotope Stage 5 (MIS 5), has been thoroughly investigated due to its similarity to the modern interglacial period (MIS 1). According to records from Chinese stalagmites and loess deposits, evolving history of EASM intensity during MIS5 can be divided into 5 sub-stages, i.e., 5a–5e. However, during the 3 warm sub-stages (5a, 5c, and 5e), evolving history of EASM intensity recorded by Chinese stalagmites and loess deposits is apparently different. Oxygen isotope (δ$^{18}$O) records of stalagmites demonstrate that the EASM intensity during MIS5e, 5c, and 5a is not obviously different. On the other hand, EASM intensity apparently decreased from MIS5e to 5c and 5a based on Chinese loess deposits records. The discrepancy between Chinese stalagmite and loess deposits reveals that δ$^{18}$O records of stalagmites may not be a pure indicator of EASM intensity. The relationship between δ$^{18}$O and EASM intensity is not linear. Based on δ$^{18}$O data of modern precipitation from 21 weather stations within major monsoon area in China (MMAC, ca. 110°E to 122°E, 18°N to 41°N), we speculate that Chinese stalagmite δ$^{18}$O values recorded changes of δ$^{18}$O of summer precipitation as well as adjustment from δ$^{18}$O of winter precipitation. Inconsistent records from Chinese stalagmites and loess deposits indicate that further investigations are needed to study the mechanism and fractionation of δ$^{18}$O in stalagmites collected in China.
Starting Page	3937
Ending Page	3950
Page Count	14
File Format	PDF
ISSN	18666280
Journal	Environmental Earth Sciences
Volume Number	73
Issue Number	7
e-ISSN	18666299
Language	English
Publisher	Springer Berlin Heidelberg
Publisher Date	2014-09-16
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	MIS5 East Asian summer monsoon (EASM) Oxygen isotope of stalagmite Chinese loess deposits Major monsoon area in China (MMAC) Geology Hydrology/Water Resources Geochemistry Environmental Science and Engineering Terrestrial Pollution Biogeosciences
Content Type	Text
Resource Type	Article
Subject	Global and Planetary Change Earth-Surface Processes Soil Science Environmental Chemistry Pollution Geology Water Science and Technology

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