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暴雨灾害  2019, Vol. 38 Issue (2): 152-160    DOI: 10.3969/j.issn.1004-9045.2019.02.007
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河南省雨季短时强降水时空分布特征
王婧羽2,1, 李哲1, 汪小康2, 王晓芳2, 崔春光2
1. 国网河南省电力公司电力科学研究院, 郑州 450052;
2. 中国气象局武汉暴雨研究所暴雨监测预警湖北省重点实验室, 武汉 430205
Temporal and spatial distribution characteristics of flash heavy rain in Henan during rainy season
WANG Jingyu2,1, LI Zhe1, WANG Xiaokang2, WANG Xiaofang2, CUI Chunguang2
1. State Grid Henan Electric Power Research Institute, Zhengzhou 450052;
2. Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research, Institute of Heavy Rain, China Meteorological Administration, Wuhan 430205
 全文: PDF (9346 KB)   HTML ( 输出: BibTeX | EndNote (RIS)      背景资料
摘要 利用高密度地面自动站逐小时降水观测资料,分析了河南省2010-2015年雨季(5-9月)短时强降水(flash heavyrain,FHR)的时空分布特征。主要结果如下:河南省FHR集中发生在7、8月,其中7月最多,8月次之;河南雨季FHR量、降水贡献和发生频率的局地差异明显,主要存在4个大值区,即豫北黄河以北地区、豫东商丘地区、豫西南伏牛山以南以东地区、豫南沿淮及其以南地区;地形对降水的增幅作用显著,且主要是通过增加FHR发生频次实现的;FHR频次日变化呈明显的双峰结构,傍晚至凌晨的前半夜为FHR频发时段;4个大值区内FHR频次日变化差异明显,如黄河以北地区其日变化幅度较大、呈单峰型,而沿淮及其以南地区其日变化幅度较小、呈持续活跃型;大部分FHR前后都伴随着连续降水,降水过程的持续时间主要在1~8 h之间,持续时间大于等于3 h的过程主要位于两个与地形密切相关的高频集中区,即伏牛山以东支脉的喇叭口地形区和沿淮及其以南地区。
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王婧羽
李哲
汪小康
王晓芳
崔春光
关键词短时强降水   雨季   时空分布   日变化   地形     
Abstract: Based on the hourly rainfall data from dense automatic weather stations over Henan between May and September from 2010 to 2015, we have analyzed temporal and spatial distribution characteristics of flash heavy rain (FHR) in this province during rainy season. Major results are as follows. FHR occurs most frequently in July, followed by August. According to regional difference of FHR in amount, contribution rate and frequency, there are four high value centers of FHR, i.e. the north of the Yellow River in the northern Henan, the Shangqiu in the eastern Henan, the piedmont region involved with the south and east of Funiu Mountains in the southwest Henan, and the basins along Hwai River and its south in the southern Henan. Terrain has a significant effect on the increase of precipitation, which is mainly achieved by increasing the frequency of FHR. The diurnal variation of FHR frequency shows obviously a double peak structure, and FHR occurs mostly in the period from nightfall to wee hours of the morning. The diurnal variation of FHR frequency differs among the four high value centers mentioned above. For example, in the north of the Yellow River, it shows a single peak characteristic and its amplitude is large, while in the basins along Hwai River and its south, it shows a persistent and active characteristic and its amplitude is small. Most of FHR events are accompanied by continuous precipitation whose durations are between 1 h and 8 h, and those lasting longer than 3 h occur more in the two high value centers related closely to terrain, i.e. the bell mouthed terrain in the east of Funiu Mountains and the basins along Hwai River and its south.
Key wordsflash heavy rain   rainy season   temporal and spatial distribution   diurnal variation   terrain   
收稿日期: 2018-08-21;
基金资助:

国家自然科学基金项目(41705019);国网河南省电力公司电力科学研究院重要输电通道强降水预警技术研究及应用项目(SGTYHT/14-JS-191)

作者简介: 王婧羽,主要从事暴雨机理研究。E-mail:amywang060@163.com
引用本文:   
王婧羽, 李哲, 汪小康,等 .2019. 河南省雨季短时强降水时空分布特征[J]. 暴雨灾害, 38(2): 152-160.
WANG Jing-Yu, LI Zhe, WANG Xiao-Kang, et al .2019. Temporal and spatial distribution characteristics of flash heavy rain in Henan during rainy season[J]. Torrential Rain and Disasters, 38(2): 152-160.
 
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