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Precipitation in eastern China over the past millennium varied with large-scale climate patterns

Earth Sciences

Precipitation in eastern China over the past millennium varied with large-scale climate patterns

M. Wang, C. Hu, et al.

Discover the intriguing patterns of modern precipitation variability in East China. This research, conducted by Mengyu Wang and colleagues, reveals how ancient stalagmite records unveil the interplay of solar variability and ocean dynamics over the last millennium, influencing rainfall through complex oscillations.

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Playback language: English
Abstract
Modern precipitation variability over East China is characterized by meridional tripole and dipole structures, linked to atmosphere and ocean dynamics. Instrumental data might be influenced by anthropogenic global warming, making it unclear if the mechanisms underlying these patterns have remained constant since the pre-industrial period. This study investigates spatiotemporal precipitation variability over the past 1150 years using three high-resolution stalagmite δ¹⁸O records from southern, central, and northern China. Principal component analysis reveals that the first principal component (reflecting large-scale Asian monsoon strength) is linked to solar variability. The second and third principal components (reflecting rainfall) reveal tripole and dipole patterns persisting over the last millennium, driven by the Pacific Decadal Oscillation (PDO) and Atlantic Multidecadal Oscillation (AMO). Interactions between the monsoon, PDO, and AMO influence spatiotemporal rainfall patterns in East China.
Publisher
Communications Earth & Environment
Published On
Dec 22, 2022
Authors
Mengyu Wang, Chaoyong Hu, Yuhui Liu, Lianlian Li, Shucheng Xie, Kathleen Johnson
Tags
precipitation variability
East China
stalagmite records
Pacific Decadal Oscillation
Atlantic Multidecadal Oscillation
Asian monsoon
solar variability
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