Yi Wang - Strong coupling of the East Asian summer monsoon. Accepted Manuscript.pdf (1.44 MB)
Strong coupling of the East Asian summer monsoon and hydroclimate footprints during 53–47 ka
journal contribution
posted on 2023-06-07, 07:54 authored by Wei Huang, Jinguo Dong, Qingfeng Shao, Fucai Duan, Yi WangYi WangA multi-proxy (d18O, d13C and trace elements) analysis of an absolutely-dated stalagmite in northern China is conducted to reconstruct the East Asian summer monsoon (EASM) intensity and local hydroclimate conditions during the period of 53.8–47.4 ka (BP, before 1950 CE). Our d18O and d13C records, with 24-yr resolution, clearly register the Dansgaard-Oeschger (DO) events 14 and 13. A clear double-peak structure for DO13, as previously detected in the NGRIP ice core, is identified in our d18O and d13C records, for the first time. This strong correspondence at the finer time-scale indicates a sensitive and rapid response of the EASM system to the North Atlantic climate changes through air-sea coupling. Our d18O record shows that the EASM intensity deceased abruptly during latter stage of DO14 (51.1–50.3 ka). This abrupt change is different from other stalagmite d18O records from central and southern China. On the other hand, both the d13C and trace element records, representing local hydroclimatic changes, match well with the d18O record, reflecting an integrated EASM system, on the timescale of the DO cycles. The covariance suggests that the hydrological variation in northern China could be modulated by the movement of the large-scale EASM circulation. Further comparison displays an anti-correlated relationship between the millennial precipitation changes in northern and southeastern China during the period of 51.5–47.4 ka. This anti-correlation is analogous to the “North-South” dipole mode in observed present-day precipitation. Overall, this study advances our understanding of the spatial and temporal evolution of the EASM precipitation on the millennial timescale.
History
Publication status
- Published
File Version
- Accepted version
Journal
Palaeogeography, Palaeoclimatology, PalaeoecologyISSN
0031-0182Publisher
ElsevierExternal DOI
Volume
597Page range
1-12Article number
a111003Department affiliated with
- Geography Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2022-04-29First Open Access (FOA) Date
2023-04-19First Compliant Deposit (FCD) Date
2022-04-28Usage metrics
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