Temporal and Spatial Characteristics of Extreme Precipitation Events in North China Plain on Background of Climate Warming

AN Hua; YAN Jun-ping; ZHANG Tao-tao; LIAO Guang-ming

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Temporal and Spatial Characteristics of Extreme Precipitation Events in North China Plain on Background of Climate Warming

- Temporal and Spatial Characteristics of Extreme Precipitation Events in North China Plain on Background of Climate Warming
- Bulletin of Soiland Water Conservation Vol. 32, Issue 3, Pages: 144-148(2013)
- 作者机构：
  
  陕西师范大学旅游与环境学院,陕西,西安,710062
- 作者简介：
- 基金信息：
- DOI：
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- Published：2013
- 稿件说明：
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AN Hua, YAN Jun-ping, ZHANG Tao-tao, et al. Temporal and Spatial Characteristics of Extreme Precipitation Events in North China Plain on Background of Climate Warming[J]. Bulletin of Soiland Water Conservation, 2013, 32(3): 144-148.
DOI：

AN Hua, YAN Jun-ping, ZHANG Tao-tao, et al. Temporal and Spatial Characteristics of Extreme Precipitation Events in North China Plain on Background of Climate Warming[J]. Bulletin of Soiland Water Conservation, 2013, 32(3): 144-148. DOI：

摘要

利用1961—2010年华北平原53个气象站的逐日降水资料

采用百分位值法定义极端降水事件的阈值

统计极端降水事件的降水量、频次和强度

重点分析华北平原近50a极端降水事件时空变化特征。结果表明:(1)在气候暖化背景下

近50a华北平原极端降水事件整体呈现下降趋势;(2)在空间格局上

极端总降水量、发生频率和强度空间格局具有一致性;(3)华北平原极端降水呈现下降趋势的区域主要分布于河北省及山东省东南沿海一带

而河南省大部呈上升趋势;(4)从时间上看各指标均呈波动变化

20世纪60年代表现出明显的减少趋势

且90年代中后期波动变化剧烈

并开始呈现上升趋势。除极端降水强度外

极端总降水量及频次均发生了突变

时间在1965年左右。

Abstract

Based on daily precipitation data of 53meteorological stations over the North China Plain during 1961-2010

the extreme precipitation thresholds were determined for different stations by centesimal value method.Then

the three indices of annual amount

frequency and intensity of extreme precipitation events were counted and their spatial characteristics and temporary trends were analyzed.Results showed that most stations in the North China Plain had no significant monotonic trend by each selected index of extreme precipitation events and however

the annual amount

frequency and intensity tended to reduce.Furthermore

the variation trends of extreme precipitation events exhibited similar spatial variability.Specifically

there was a positive trend of extreme precipitation events in Hebei Province and the southeast coast of Shandong Province

while a negative trend

in He'nan Province.Each index fluctuated during 1961-2010

and basically showed a significantly decreasing trend in the 1960s.The annual amount and frequency showed abrupt changes around the year of 1965.However

the intensity did not show an abrupt change.

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