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Spatiotemporal Variability in Precipitation Extremes in the Jianghuai Region of China and the Analysis of Its Circulation Features

Author

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  • Yuanning Wang

    (College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China)

  • Zhuoyue Peng

    (College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China)

  • Hao Wu

    (College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China)

  • Panpan Wang

    (College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou 225009, China)

Abstract

In the context of global warming, changes in extreme-precipitation events are becoming increasingly complex, and investigating the spatial and temporal variation characteristics of extreme precipitation is extremely important for scientific water-resource planning, preventing new climate risks and maintaining ecosystem balances. Based on the daily precipitation from 1960–2017 at 15 meteorological stations in the Jianghuai region, the extreme-precipitation indices were calculated. The variations in 12 extreme-precipitation indices were detected by using the Mann–Kendall test in the Jianghuai region. The periodicity of indices was examined by wavelet analysis detecting significant time sections. Through the cross wavelet transform and wavelet coherence analyses, the nonlinear connections between extreme precipitation and atmospheric circulation were explored. The results indicate significant increasing trends in the max one-day precipitation amount (Rx1day), extreme wet days (R99p), and simple precipitation intensity index (SDII). The intensity of extreme precipitation increased significantly. The variation in extreme precipitation showed different trends in different regions, with a greater likelihood of increasing extreme-precipitation intensity and frequency in the southern region compared to the central and northern regions. The period of most oscillations of the indices tend toward be on a time scale of 2–4 years and are in the 1990s. The number of heavy precipitation days (R10 mm) and number of very heavy precipitation days (R20 mm) had, mainly, periods of 5.84 years. Additionally, there were significant resonance periods between the extreme-precipitation indices and the atmospheric circulation index; however, there were obvious differences in time domains. The North Atlantic Oscillation (NAO) and East Asian summer monsoon (EASM) had the most significant effect on the duration of extreme precipitation; Atlantic Oscillation (AO) and EASM had the most significant influence on the extreme-precipitation intensity. The results of the study can provide a scientific basis for water-resource management and disaster prevention and control in the Jianghuai region.

Suggested Citation

  • Yuanning Wang & Zhuoyue Peng & Hao Wu & Panpan Wang, 2022. "Spatiotemporal Variability in Precipitation Extremes in the Jianghuai Region of China and the Analysis of Its Circulation Features," Sustainability, MDPI, vol. 14(11), pages 1-23, May.
    • Handle: RePEc:gam:jsusta:v:14:y:2022:i:11:p:6680-:d:827727
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    References listed on IDEAS

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    1. José Sena & Leandro Beser de Deus & Marcos Freitas & Lazaro Costa, 2012. "Extreme Events of Droughts and Floods in Amazonia: 2005 and 2009," Water Resources Management: An International Journal, Published for the European Water Resources Association (EWRA), Springer;European Water Resources Association (EWRA), vol. 26(6), pages 1665-1676, April.
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    1. Yuxin Tao & Hao Wu & Yitong Wang, 2023. "Rapid Urbanization Increased the Risk of Agricultural Waterlogging in the Huaibei Plain, China," Sustainability, MDPI, vol. 15(12), pages 1-15, June.

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