A 200-year annually laminated stalagmite record of precipitation seasonality in southeastern China and its linkages to ENSO and PDO

Haiwei Zhang, Hai Cheng, Christoph Spötl, Yanjun Cai, Ashish Sinha, Liangcheng Tan, Liang Yi, Hong Yan, Gayatri Kathayat, Youfeng Ning, Xianglei Li, Fan Zhang, Jingyao Zhao, R. Lawrence Edwards

Research output: Contribution to journalArticlepeer-review

40 Scopus citations

Abstract

In southeastern China (SEC), the precipitation amount produced by the East Asian summer monsoon (EASM) is almost equivalent to that during the non-summer monsoon (NSM) period, both of them significantly affecting agriculture and socioeconomy. Here, we present a seasonally-resolved stalagmite δ18O record (δ18Os) for the interval 1810–2009 AD from E’mei cave, Jiangxi Province, SEC. The comparison between δ18Os and instrumental data indicates that the δ18Os variability is primarily controlled by the precipitation seasonality (i.e., the ratio of EASM/NSM precipitation) modulated by the El Niño/Southern Oscillation (ENSO) on interannual to interdecadal timescales. Higher (lower) δ18Os values thereby correspond to lower (higher) EASM/NSM ratios associated with El Niño (La Niña) events. Significant correlations with ENSO and the Pacific Decadal Oscillation (PDO) indicate that the precipitation seasonality in SEC is remarkably influenced by ocean-atmosphere interactions, with lower (higher) EASM/NSM ratios during warm (cold) phases of ENSO/PDO. The progressive increase in δ18Os since 2005 AD may reflect a strengthening of the central Pacific El Niño under continued anthropogenic global warming. The relationship between seasonal precipitation and δ18Os with ENSO/PDO requires further studies.

Original languageEnglish (US)
Article number12344
JournalScientific reports
Volume8
Issue number1
DOIs
StatePublished - Dec 1 2018

Bibliographical note

Funding Information:
This study was supported by the NSFC (41502166), the China Postdoctoral Science Foundation (2015M580832), the NSFC (41731174), the Key Laboratory of Karst Dynamics, Ministry of Land and Resources of the People’s Republic of China (MLR) and GZAR (KDL201502) and the State Key Laboratory of Loess and Quaternary Geology (SKLLQG1046).

Publisher Copyright:
© 2018, The Author(s).

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