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

气象与环境学报 ›› 2013, Vol. 29 ›› Issue (5): 69-73.doi:

• 论　文 • 上一篇    下一篇

保定暴雨气候特征及其变化趋势

黄鹤 于雷 丁峥臻 王志超 马鸿青 杨超   

  1. 保定市气象局，河北 保定 071000
  • 出版日期:2013-10-31 发布日期:2013-10-31

Climatic characteristic of rainstorm and its trend in Baoding of Hebei province

HUANG He YU Lei DING Zheng-zhen WANG Zhi-chao MA Hong-qing YANG Chao   

  1. Baoding Meteorological Service, Baoding 071000, China
  • Online:2013-10-31 Published:2013-10-31

PDF (PC)

476

被引次数

8

摘要： 利用1974—2012年保定19个气象台站逐日降水资料，采用线性趋势分析、Morlet小波变换、Mann-Kendall法和功率谱等方法，对保定市暴雨发生站次数的时间和空间分布特征及变化进行分析。结果表明：保定地区暴雨年平均发生站次数北多南少，暴雨主要集中在东北部；汛期（6—8月）是暴雨出现的主要时段，最集中的时段则出现在主汛期（7—8月）；暴雨站次数从5月中旬开始呈现缓慢增加趋势，6月下旬猛增，7月下旬达到最高值；近39 a来，年暴雨发生站次数整体呈下降趋势，尤其是8月下降趋势最为明显。保定主汛期暴雨发生站次数在20世纪80年代中期存在着由少到多的突变，90年代末期存在着由多到少的突变

关键词: 小波变换, Mann-Kendall法, 功率谱

Abstract: Based on the daily precipitation data from 19 meteorological stations in Baoding during 1974 to 2012, the spatial and temporal distribution characteristics of rainstorm and its variation were analyzed using methods of a linear trend analysis, a Mann-Kendall test, a wavelet analysis and a power spectrum. The results show that more rainstorms occur in the north and less in the south and most are in the northeast region. Rainstorm usually appears in the flood season (June to August), especially in the main flood season (July to August). Rainstorm frequency increases slowly since the middle ten days of May, then increases sharply in the last ten days of June, and it reaches the peak value in the last ten days of July. The annual rainstorm frequency is in a decreasing trend in the recent 39 years, especially in August. An abrupt change of rainstorm frequency from less to more during the main flood season occurs in 1980 s, while it is in the late of 1990 s that the rainstorm frequency changes from more to less.

Key words: Wavelet transform, Mann-Kendall test, Power spectrum