Quantitative reconstruction of a single super rainstorm using daily resolved δ18O of land snail shells

Guozhen Wang ¹Jibao Dong ²Tao Han ³Chengcheng Liu ⁴Fan Luo ⁵Haotian Yang ⁶Miaohong He ⁷Guoqiang Tang ⁸Nanyu Zhao ³Qian Zhang ⁹Gang Xue ³John Dodson ¹⁰Qiuli Li ⁸Hong Yan¹¹

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作者信息

1. State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China;University of Chinese Academy of Sciences,Beijing 100049,China
2. State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China;National Observation and Research Station of Earth Critical Zone on the Loess Plateau of Shaanxi,Xi'an 710061,China
3. State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China
4. State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China;Xi'an Institute for Innovative Earth Environment Research,Xi'an 710061,China
5. Xi'an Institute for Innovative Earth Environment Research,Xi'an 710061,China
6. Institute of Global Environmental Change,Xi'an Jiaotong University,Xi'an 710049,China
7. State Key Laboratory of Isotope Geochemistry,Guangzhou Institute of Geochemistry,Chinese Academy of Sciences,Guangzhou 510640,China
8. State Key Laboratory of Lithospheric Evolution,Institute of Geology and Geophysics,Chinese Academy of Sciences,Beijing 100029,China
9. Yunnan Key Laboratory of Earth System Science,Yunnan University,Kunming 650500,China
10. State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China;School of Biological,Earth and Environmental Sciences,University of New South Wales,Sydney 2052,Australia
11. State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an 710061,China;Laoshan Laboratory,Qingdao 266061,China;Institute of Global Environmental Change,Xi'an Jiaotong University,Xi'an 710049,China
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Abstract

A"once-in-a-millennium"super rainstorm battered Zhengzhou,central China,from 07/17/2021 to 07/22/2021(named"7.20"Zhengzhou rainstorm).It killed 398 people and caused billions of dollars in damage.A pressing question is whether rainstorms of this intensity can be effectively documented by geological archives to understand better their historical variabilities beyond the range of meteorological data.Here,four land snail shells were collected from Zhengzhou,and weekly to daily resolved snail shellδ18O records from June to September of 2021 were obtained by gas-source mass spectrometry and sec-ondary ion mass spectrometry.The daily resolved records show a dramatic negative shift between 06/18/2021 and 09/18/2021,which has been attributed to the"7.20"Zhengzhou rainstorm.Moreover,the measured amplitude of this shift is consistent with the theoretical value estimated from the flux balance model and instrumental data for the"7.20"Zhengzhou rainstorm.Our results suggest that the ultra-high resolution δ18O of land snail shells have the potential to reconstruct local synoptic scale rainstorms quantitatively,and thus fossil snail shells in sedimentary strata can be valuable material for investigating the historical variability of local rainstorms under different climate backgrounds.

Key words

Rainstorm/Land snail shell/δ18O/Paleoweather/Central China

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基金项目

National Natural Science Foundation of China(42221003)

National Natural Science Foundation of China(42025304 42103084)

Research Projects from the Chinese Academy of Sciences(XDB40000000)

Science and Technology Innovation Project of Laoshan Laboratory(LSKJ202203300)

CAS Youth Interdisciplinary Team()

出版年

2024

科学通报(英文版)

中国科学院

科学通报(英文版)

CSTPCD

ISSN：1001-6538

参考文献量1

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