湖北农业科学 ›› 2022, Vol. 61 ›› Issue (5): 177-180.doi: 10.14088/j.cnki.issn0439-8114.2022.05.031

• 农业气象 • 上一篇    下一篇

1970—2019年滁州市降水特征分析

蒋琳, 贾天山, 熊世为, 凌遵斌, 华俊玮, 荀静   

  1. 安徽省滁州市气象局,安徽 滁州 239000
  • 收稿日期:2020-12-25 出版日期:2022-03-10 发布日期:2022-04-01
  • 作者简介:蒋琳(1991-),女,江苏丹阳人,工程师,硕士,主要从事天气预报及相关研究,(电话)15357128629(电子信箱)jianglin771011009@163.com。
  • 基金资助:
    安徽省气象局预报员专项(KY201906); 滁州市气象局科研项目(CZQXKY202004)

The characteristic analysis of precipitation in Chuzhou city during 1970—2019

JIANG Lin, JIA Tian-shan, XIONG Shi-wei, LING Zun-bin, HUA Jun-wei, XUN Jing   

  1. Chuzhou Meteorological Bureau of Anhui Province, Chuzhou 239000,Anhui,China
  • Received:2020-12-25 Online:2022-03-10 Published:2022-04-01

摘要: 采用具有自适应性的EEMD方法(Ensemble Empirical Mode Decomposition)重点研究滁州市1970—2019年7个国家基本站年降水和汛期降水的非线性变化特征。结果显示,以滁州站为例,其近50年的降水量变化存在年际尺度和年代际尺度,分别为2.3年和8.0年以及16年和32年,同时发现具有2.3年和8.0年时间尺度的年际变化占主导地位;全市7个国家站汛期降水量对年降水量贡献率均在60%以上,且在空间上总体呈东南多西北少的特征;全市7个国家站汛期多年平均暴雨降水量占汛期多年平均降水量的比率均在33%以上。7个国家站近50年汛期暴雨频数除来安站和天长站呈下降趋势外其余皆呈增加趋势,而汛期小雨频数皆呈下降趋势。

关键词: 年降水量, 汛期降水, EEMD方法, 滁州市

Abstract: Based on the precipitation of 7 national basic stations in Chuzhou city during 1970—2019, Ensemble Empirical Mode Decomposition(EEMD) was used to analyze the nonlinear variation characteristics of the annual precipitation and flood season precipitation. The results showed that taking Chuzhou station as an example, the precipitation had short periods of 2.3 years and 8.0 years which were dominant, as well as the long-term oscillation 16 years and 32 years. The contribution rate of precipitation in the flood season was above 60% of the annual precipitation, and generally speaking, the spatial distribution of precipitation in flood season was more southeast and less northwest;The ratio of rainstorm precipitation in flood season to precipitation in flood season was above 33%. In the past 50 years, the frequency of rainstorms in 7 national stations in the flood season all showed an increasing trend, except Tianchang station and Laian station, while the frequency of light rainstorms in the flood season all showed a decreasing trend.

Key words: annual precipitation, precipitation in the flood season, EEMD method, Chuzhou city

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