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[1]WANG Yuanning,WU Hao,WANG Panpan,et al.Spatiotemporal Variability of Precipitation in the Jianghuai Region During 1960—2017[J].Research of Soil and Water Conservation,2023,30(04):236-244,255.[doi:10.13869/j.cnki.rswc.2023.04.005.]

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Spatiotemporal Variability of Precipitation in the Jianghuai Region During 1960—2017

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 30 Number of periods: 2023 04 Page number: 236-244,255 Column: Public date: 2023-06-10

Title:: Spatiotemporal Variability of Precipitation in the Jianghuai Region During 1960—2017

Author(s):: WANG Yuanning, WU Hao, WANG Panpan, PENG Zhuoyue; (College of Hydraulic Science and Engineering, Yangzhou University, Yangzhou, Jiangsu 225009, China)

Keywords:: precipitation; spatiotemporal variations; atmospheric circulation; Jianghuai region

CLC:: P426.6

DOI:: 10.13869/j.cnki.rswc.2023.04.005.

Abstract:: [Objective] The aim of the study is to explore the spatial and temporal variation characteristics of precipitation in the Jianghuai region, and on this basis, the influence of atmospheric circulation factors on precipitation was investigated to provide a scientific basis for water resources management and disaster prevention and control in the Jianghuai region. [Methods] Based on daily precipitation and atmospheric circulation data from 15 meteorological stations in the Jianghuai region from 1960 to 2017, this study used Mann-Kendall trend test, cumulative distance level curve, wavelet analysis, cross wavelet transform and wavelet coherence methods to reveal the spatial and temporal variation characteristics of the precipitation and the factors influencing the precipitation in the Jianghuai region. [Results] The precipitation in Jianghuai region had a multi-scale periodic oscillation, in which winter precipitation showed a significant increasing trend(p<0.05)and experienced the least over-under process, and there was a main cycle of 55.6-year. Annual and summer precipitation showed a non-significant increasing trend and experienced the most overunder process, but it mostly showed significant changes in the southern part of the region. The precipitation in spring and autumn showed an insignificant downward trend, and there were no significant change stations in the whole region. There was a certain resonance cycle between precipitation and the Atmospheric Circulation Index on an interannual scale, with the East Asian Summer Monsoon(EASM)having the most significant influence and the Southern Oscillation Index(SOI)having the least significant influence. [Conclusion] The spatial and temporal characteristics of precipitation in the Jianghuai region varied significantly on interannual and seasonal scales, and were significantly influenced by the atmospheric circulation on interannual scales. The results of this study can provide theoretical support for scientific water resources planning, prevention of climate-based risks and achievement of ecological balance in the region.

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Last Update: 2023-06-10