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- W4387209375 endingPage "108329" @default.
- W4387209375 startingPage "108329" @default.
- W4387209375 abstract "The 8.2 ka abrupt cooling event has been extensively studied, whereas the 7.2 ka event and their comparations rarely mentioned. Here, we present a high resolution (∼4 years) and precisely dated (±25 years) speleothem multi-proxy record from Zhangjia Cave (northern margin of Sichuan basin, China) spanning the 7.2 and 8.2 ka events within the transition of early to middle Holocene. The speleothem δ18O mainly reflects the dynamic facets of the East Asian summer monsoon (EASM) system, while its δ13C and trace elements ratios serve as an indicator of local hydrological conditions. Our results reveal intense dry conditions in southwest China during the 7.2 ka event, despite the 7.2 event was characterized by a relatively stronger monsoon compared to the 8.2 ka event. Furthermore, the hydrological conditions during the 7.2 ka event and the middle Holocene appear to exhibit “north flood and south drought” pattern when compared to different paleoclimate records in EASM domains, while it can be summarized as “spatially consistent drought” in the 8.2 ka event. These different hydrological conditions are a response to the weakening of the EASM, a phenomenon also observed in modern climatic observations and empirical simulations, which underpins our understanding that the speleothem δ18O variations are mainly dynamical manifestations of the EASM system, likely different with its thermodynamical appearances." @default.
- W4387209375 created "2023-10-01" @default.
- W4387209375 creator A5010742921 @default.
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- W4387209375 creator A5084803858 @default.
- W4387209375 date "2023-11-01" @default.
- W4387209375 modified "2023-10-07" @default.
- W4387209375 title "Different responses of precipitation patterns to the East Asian summer monsoon weakening: The 7.2 and 8.2 ka events" @default.
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