Study on the Temporal-spatial teristics of Extreme Precipitation Distribution Characin Jiangsu Province

• 作者: Jianmao Guo Tengfei Zheng Xin Yu
• 来源期刊: 气象与环境研究：英文版
• 学科: 地球科学
• 关键词: 时空分布 江苏省 地球化学特征 MANN-KENDALL检验 降水分布 极端降水 振荡特性 振荡周期
• 年，卷（期）: 2013,（8）
• 页码范围: 1-6
• 页数: 6页
• 分类号: P618.51

摘要

[Objective]The research aimed to grasp the spatial and temporal distribution characteristics of extreme precipitation in Jiangsu Province.[Method]Threshold was determined by detrended fluctuation analysis(DFA)based on the data of daily precipitation over Jiangsu Province from1961 to 2010,and the oscillation period and mutation were detected by the method of Morlet wavelet analysis and Mann-Kendall test respectively.[Result]The annual frequency of extreme precipitation in Jiangsu Province demonstrated oscillation characteristics with 8-10 a,and the mutation mainly happened in 2006.In addition,the oscillation period of extreme precipitation during summer was 8-10 a,and its mutation happened in1998.The oscillation periods of extreme precipitation,however,during autumn were 2-3 and 5-7 a.Extreme precipitation and total rainfall had better consistency.They both presented the characteristics of more in the south and less in the north,and big-small-value zone was concentrated.[Conclusion]The research could provide technical support for making defense policy of the related disaster for relevant departments.