首页|Global precipitation change during the Holocene:a combination of records and simulations

Global precipitation change during the Holocene:a combination of records and simulations

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Precipitation can shape our climate both in the present and the future.Even though we have made significant advances in studying the mechanisms of millennial-scale climate changes through high-resolution records,we still cannot quantitatively characterize the global spatiotemporal precipitation variations within the Holocene.Therefore,we developed a new approach to integrating data from 349 globally distributed records and climate models to reconstruct regional and global precipitation patterns over the last 12000 years.Our results reveal that precipitation reconstructions can be divided into monsoon-driven and westerly driven patterns.The results suggest that an arid climate was experienced in the late glacial and early Holocene epoch(～12-7.4 cal ka BP),attaining a middle Holocene optimum(～7.4-3.5 cal ka BP),and drier after the middle Holocene.According to our reconstructions,the global precipitation reconstruction increased from the early Holocene until 3.8 cal ka BP and then subsequently decreased.In addition,our reconstruc-tions better reproduce the low-frequency events and extreme precipitation at the millennial scale in the hemispheres,but the performance of the reconstructions in the equatorial Pacific and the Southern Hemisphere of Africa and the Americas is controversial.The resolution of the record and the simulation capability of the climate model remain important means to improve our understanding of past climate change.

Wangting YE、Yu LI

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Key Laboratory of Western China's Environmental Systems(Ministry of Education),College of Earth and Environmental Sciences,Center for Hydrologic Cycle and Water Resources in Arid Region,Lanzhou University,Lanzhou 730000,China

National Natural Science Foundation of ChinaSecond Tibetan Plateau Scientific Expedition and Research Program(STEP)Strategic Priority Research Program of Chinese Academy of Sciences111 Project

420774152019QZKK0202XDA20100102BP0618001

2024

10.1007/s11707-022-1047-5

地球科学前沿
高等教育出版社

地球科学前沿

CSTPCD
影响因子：0.585
ISSN：2095-0195
年,卷(期)：2024.18(1)