| 保定暴雨气候特征及其变化趋势 |
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| 引用本文： | 黄鹤,于雷,丁峥臻,王志超,马鸿青,杨超.保定暴雨气候特征及其变化趋势[J].气象与环境学报,2013,29(5):69-73. |
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| 作者姓名： | 黄鹤 于雷 丁峥臻 王志超 马鸿青 杨超 |
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| 作者单位： | 保定市气象局，河北 保定 071000 |
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| 基金项目： | 公益性（气象）行业专项＂华北、东北暴雨发生发展特点及预报技术研究＂（GYHY200906011）资助. |
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| 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
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| 关 键 词： | 小波变换 Mann-Kendall法 功率谱 |
Climatic characteristic of rainstorm and its trend in Baoding of Hebei province |
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| HUANG He,YU Lei,DING Zheng-zhen,WANG Zhi-chao,MA Hong-qing,YANG Chao.Climatic characteristic of rainstorm and its trend in Baoding of Hebei province[J].Journal of Meteorology and Environment,2013,29(5):69-73. |
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| Authors: | HUANG He YU Lei DING Zheng-zhen WANG Zhi-chao MA Hong-qing YANG Chao |
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| Institution: | Baoding Meteorological Service, Baoding 071000, China |
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| 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 1980s,while it is in the late of 1990s that the rainstorm frequency changes from more to less. |
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| Keywords: | Wavelet transform Mann-Kendall test Power spectrum |
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