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doi:  10.12013/qxyjzyj2018-017
2007—2015年江西省短历时强降水时空分布特征分析

Analysis of spatial and temporal distribution characteristics of short duration heavy rain in Jiangxi province during 2007-2015
摘要点击 30  全文点击 31  投稿时间:2017-09-13  修订日期:2018-03-19
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基金:  2015年江西省重点项目(编号:20152ACG70002);2016年江西省预报员专项“台风‘苏迪罗’影响下赣北暴雨成因分析”
中文关键词:  短历时强降水,量级,时空分布,江西省
英文关键词:  short duration heavy rain  magnitude  spatial and temporal distribution  Jiangxi province
        
作者中文名作者英文名单位
邵明阳Shao Mingyang九江市气象台
殷剑敏Yin Jianmin江西省气象台
刘献耀Liu Xianyao江西省气象台
引用:邵明阳,殷剑敏,刘献耀.2018,2007—2015年江西省短历时强降水时空分布特征分析[J].气象与减灾研究,41(2):119-125
中文摘要:
      选取2007—2015年江西省1 895个地面气象站的降水观测资料,分别统计分析了20 mm≤1 h降水量<30 mm、30 mm≤1 h降水量<50 mm、1 h降水量≥50 mm、3 h降水量≥50 mm、6 h降水量≥50 mm短历时强降水的年际变化、季节变化、日变化和空间分布特征。结果表明: 1)从年际变化来看,1 h降水量≥20 mm短历时强降水的日数呈现增多的趋势。2)从季节变化来看,短历时强降水天气主要出现在4—9月,其中6月短历时强降水日数最多,1、2、12月最少;5—8月有超过80%的站点出现短历时强降水天气。3)从日变化来看,短历时强降水易发生在傍晚至上半夜时段,主峰值区出现在17—21时,次峰值出现在08—09时;4)从空间分布来看,不同降水强度的短历时强降水的发生日数均呈“西少东多”的空间分布特征,其中九江地区的降水日数偏少,抚州、鹰潭地区偏多。
Abstract:
      Based on the 2007-2015 precipitation observation data of 1 895 surface weather stations in Jiangxi province, the interannual variability, seasonal variation, daily variation and spatial distribution of different short duration heavy rains (1 h precipitation≥20 mm, 30 mm≤1 h precipitation<50 mm, 1 h precipitation≥50 mm, 3 h precipitation≥50 mm, and 6 h precipitation≥50 mm)were statistically analyzed.The results are as follows: 1) From the inter decadal perspective, the number of days of short duration heavy rainfall in Jiangxi with 1 h precipitation≥20 mm increased in recent years. 2) The short duration heavy rain in Jiangxi mainly occurred from April to September, of which the highest number of short duration heavy rain days occurred in June, the lowest in January, February and December. From May to August, over 80% of the stations experienced a short duration heavy rainfall. 3) The short duration heavy rain was likely to occur during the evening to the middle night, with the main peak from 17 to 21 pm, and the sub peak from 8 to 9 am. 4) The daily number of short duration heavy rain in Jiangxi was characterized by the spatial distribution of “more east and less west”. The number of precipitation days in Jiujiang is relatively small, and there are more in Fuzhou and Yingtan.
主办单位:江西省气象学会 单位地址:南昌市高新开发区艾溪湖二路323号
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