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Dynamic spatiotemporal variation and its causes of extreme precipitation in the Huaihe River Basin, China

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Abstract

With the intensification of global warming, extreme precipitation events occur frequently all over the world. Extreme precipitation has brought huge challenges to the development of human society and economy, and it is urgent to strengthen the analysis of the causes of extreme precipitation. In this study, we first extracted precipitation events from the precipitation time series from 1960 to 2018 in the Huaihe River Basin (HRB) and then extracted extreme precipitation events based on precipitation amount and precipitation intensity. The results show that extreme precipitation in the HRB has an increasing trend after 2000, although the increasing trend is not obvious, and the uncertainty of the occurrence of extreme precipitation events had increased. Extreme precipitation mainly had a strong correlation with the surface air temperature in the North Pacific, Indian Ocean, and Qinghai–Tibet Plateau. The El Niño year and the year of abnormal circulation contribute to the production of extreme precipitation in the HRB. In the years when extremely heavy precipitation occurred in the HRB, the subtropical high was northerly. Although most of the water vapor is brought from the Pacific by the East Asian monsoon, the water vapor that causes extreme precipitation in the HRB mainly comes from the Indian Ocean. Through multivariate wavelet coherence (MWC) analysis, annual precipitation is greatly affected by multiple climate variables, while extreme precipitation is greatly affected by a single climate variable. This study provides an important reference for the analysis and prediction of extreme precipitation.

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Data availability

The climate indices data were used for this study and downloaded from https://www.cpc.ncep.noaa.gov that was freely available for users.

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Acknowledgements

The meteorological data used in this research was supported by CMA, and the climate indices were downloaded from NOAA.

Funding

The research is financially supported by the National Key R&D Program of China (2021YFC3001000) and the National Natural Science Foundation of China (Grant Nos. U1911204, 51861125203).

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Haoyu Jin, conceptualization, methodology, software, and writing—original draft. Xiaohong Chen, formal analysis, conceptualization, validation, software, and project administration. Moyang Liu and Ruida Zhong, writing—original draft, and writing—review and editing. Yingjie Pan and Tongtiegang Zhao, resources, funding acquisition, and writing — review and editing. Zhiyong Liu, supervision and data curation. Xinjun Tu, writing—review and editing.

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Correspondence to Xiaohong Chen.

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Jin, H., Chen, X., Liu, M. et al. Dynamic spatiotemporal variation and its causes of extreme precipitation in the Huaihe River Basin, China. Theor Appl Climatol 149, 1727–1751 (2022). https://doi.org/10.1007/s00704-022-04135-z

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  • DOI: https://doi.org/10.1007/s00704-022-04135-z

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