主办单位:中国气象局沈阳大气环境研究所
国际刊号:ISSN 1673-503X
国内刊号:CN 21-1531/P

气象与环境学报 ›› 2020, Vol. 36 ›› Issue (5): 18-24.doi: 10.3969/j.issn.1673-503X.2020.05.003

• 论文 • 上一篇    下一篇

1960—2018年辽河流域日降水集中程度分析

刘向培1,2(),佟晓辉2,贾庆宇1,*(),刘晓娜3,杨剑刃2,薛志阳2   

  1. 1. 中国气象局沈阳大气环境研究所, 辽宁 沈阳 110166
    2. 解放军31440部队, 辽宁 沈阳 110027
    3. 中国气象局气象干部培训学院辽宁分院, 辽宁 沈阳 110166
  • 收稿日期:2019-12-08 出版日期:2020-10-30 发布日期:2020-09-09
  • 通讯作者: 贾庆宇 E-mail:xp_Liu@foxmail.com;beyond.22@126.com
  • 作者简介:刘向培,男, 1983年生,工程师,主要从事水文气象学研究, E-mail:xp_Liu@foxmail.com
  • 基金资助:
    中国气象局沈阳大气环境研究所中央级基本科研业务重点项目(2016SYIAEZD2);中国气象局沈阳大气环境研究所中央级基本科研业务重点项目(2017SYIAEMS2);中国气象局沈阳大气环境研究所中央级基本科研业务重点项目(2018SYIAEZD3)

Characteristics of daily precipitation concentration in Liaohe River Basin from 1960 to 2018

Xiang-pei LIU1,2(),Xiao-hui TONG2,Qing-yu JIA1,*(),Xiao-na LIU3,Jian-ren YANG2,Zhi-yang XUE2   

  1. 1. Institute of Atmospheric Environment, China Meteorological Administration, Shenyang 110166, China
    2. 31440 Troop of People's Liberation Army of China, Shenyang 110027, China
    3. Liaoning Branch of China Meteorological Administration Training Centre, Shenyang 110166, China
  • Received:2019-12-08 Online:2020-10-30 Published:2020-09-09
  • Contact: Qing-yu JIA E-mail:xp_Liu@foxmail.com;beyond.22@126.com

摘要:

基于1960-2018年的日降水资料,计算辽河流域降水集中指数(CI),分析日降水集中程度的时空特征。结果表明:降水集中指数CI可以有效描述辽河流域降水集中程度,辽河流域年CI指数平均为0.67,降水集中程度总体呈现出东部和西部低、南部和北部高的鞍型空间分布特征;夏季降水集中程度最高,各站点季平均CI指数为0.65,空间分布与年分布较一致,冬季平均CI指数最低,为0.60,由东南向西北递减;研究时段内年CI指数表现为不显著的减小趋势,其中东部区域减小的趋势最大;各子区域年CI指数平均变化周期为3 a左右,其中1985年以前,变化周期较短,在2 a左右,1985年以后,变化周期超过3 a。

关键词: 辽河流域, 降水集中指数(CI), 小波分析

Abstract:

Using daily precipitation data from 1960 to 2018 over the Liaohe River Basin, the spatiotemporal characteristics of daily precipitation concentration in this region were analyzed after calculating the precipitation concentration index (CI).The results indicated that CI can reflect the degree of precipitation concentration in the Liaohe River Basin, with an annual mean value of 0.67.The precipitation CI is smaller in the eastern and western regions of Liaohe River Basin and higher in the southern and northern regions, exhibiting a saddle pattern.The precipitation concentration is higher in summer, with the seasonal mean CI value at each station being 0.65.The seasonal mean distribution of CI is similar to the annual mean distribution.The smallest seasonal mean CI value of 0.60 occurs in winter, and the CI values decrease from the southeast to the northwest.During the study period, the annual mean CI values exhibit an insignificant decreasing trend, with the largest decreasing rate occurring in the eastern region.The mean variation cycle of CI in each sub-regions is about 3 years.Before 1985, the variation cycle of CI is relative short, about 2 years, while after 1985, it increases to more than 3 years.

Key words: Liaohe River basin, Precipitation concentration index (CI), Wavelet analysis

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