J4 ›› 2010, Vol. 28 ›› Issue (2): 173-178.

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Statistics Analysis of Climatic Features of Precipitation over 10 mm in Ningxia Region

ZHANG Nannan1 ,SANG Jianren2 , YANG Kan2, JI Xiaoling2
  

  1. 1.Ningxia Meteorological Bureau, Yinchuan 750002,China; 2. Ningxia Key Laboratory for Meteorological Disaster Prevention and Reduction,Yinchuan 750002,China
  • Received:2009-09-11 Revised:2010-02-11 Online:2010-06-30 Published:2010-06-30

宁夏中雨及以上降水过程气候特征统计分析

张楠楠1桑建人2,杨 侃2纪晓玲2   

  1. 1.宁夏回族自治区气象局,宁夏 银川 750002;2.宁夏气象防灾减灾重点实验室,宁夏 银川 750002
  • 作者简介:张楠楠(1983-),女,大学本科,助理工程师,主要从事短时监测预警及短期天气预报工作

Abstract:

The climatic feature of precipitation over 10 mm in Ningxia region in recent 49 years were analyzed by using daily precipitation data of 20 meteorological stations from 1961 to 2009. The results show that weather events with precipitation over 10 mm increased gradually with the variety of terrain from north to south, and the amount of the events in the loess hilly region of the south was double more than that in the irrigated area. Moderate rain contributed greatly to rainfall and rainstorm increased gradually. By the statistics of rainfall intensity, the frequency of rainfall more than 1.0 mm/h but less than 2.0 mm/h was the most, and more than 4.0 mm/h was the least in Ningxia, both the frequency of rainfall more than 3.0 mm/h but less than 4.0 mm/h and that less than 1.0 mm/h were gradually increased since the 1980s. The years with extremely more weather events with precipitation over 10 mm in Ningxia are 1961,1964,1985 and 1990.

摘要:

利用1961-2009年宁夏20个气象观测站逐日雨量资料,分析了近49 a来宁夏中雨及以上降水过程气候统计特征。结果表明:中雨及以上降水事件自北向南依地势逐渐增多,南部黄土丘陵区比引黄灌区多2倍;中雨对过程贡献较大,暴雨事件逐渐增多;统计过程雨强,宁夏出现2.0 mm/h>雨强≥1.0 mm/h的频次最多,雨强≥4.0 mm/h出现的频次最少,4.0 mm/h>雨强≥3.0 mm/h和雨强<1.0 mm/h的中雨及以上降水过程出现频次由1980年代开始逐渐增多;1961、1964、1985和1990年是宁夏中雨及以上降水过程多发的极端年份。

关键词: 中雨, 特征, 雨强

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