主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2017, Vol. 33 ›› Issue (4): 56-63.doi: 10.3969/j.issn.1673-503X.2017.04.007

• 论文 • 上一篇    下一篇

辽宁省短时强降水气候特征分析

李燕1, 赛瀚1, 刘静2, 刘硕3   

  1. 1. 大连市气象台, 辽宁 大连 116001;
    2. 辽宁省气象灾害监测预警中心, 辽宁 沈阳 110166;
    3. 沈阳中心气象台, 辽宁 沈阳 110166
  • 收稿日期:2016-07-01 修回日期:2016-11-04 出版日期:2017-08-30 发布日期:2017-08-30
  • 作者简介:李燕,女,1973年生,高级工程师,主要从事天气预报研究,E-mail:LYDW0211@163.com。
  • 基金资助:
    环渤海区域科技协同创新基金项目（QYXM201502）资助。

Analysis of climatic characteristics of short-time strong precipitation in Liaoning province

LI Yan1, SAI Han1, LIU Jing2, LIU Shuo3   

  1. 1. Dalian Meteorological Observatory, Dalian 116001, China;
    2. Liaoning Meteorological Disaster Monitoring and Early Warning Centre, Shenyang 110166, China;
    3. Shenyang Central Meteorological Observatory, Shenyang 110166, China
  • Received:2016-07-01 Revised:2016-11-04 Online:2017-08-30 Published:2017-08-30

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摘要： 利用1971-2003年辽宁省53个地面国家级气象站降水自记纸记录的经数字信息化处理后的逐小时降水量数据和2004-2014年自动气象站的降水观测资料，分析了4-10月辽宁省短时强降水的时空变化特征。结果表明：1971-2014年辽宁省短时强降水的发生次数与年降水总量分布对应，均呈东部地区多、西部地区少的分布特征，与辽宁地区的地形和低空西南急流的风向等气候特征密切联系。1971-2014年辽宁地区年平均短时强降水发生次数为1.5-3.5次/a，并呈剧烈的振荡变化，短时强降水发生次数与辽宁省旱涝变化具有较好的对应关系。7月和8月辽宁地区短时强降水发生最多，辽宁省东部的丹东地区短时强降水发生次数明显偏多；6-8月旬短时强降水发生次数呈先增加后减少的变化，7月下旬短时强降水发生次数达到峰值，辽宁地区不同地域短时强降水发生次数的变化趋势也不同。受辽宁地区地形和低空急流的日变化影响，辽宁地区短时强降水发生次数的日变化也具有明显的地域性，辽宁省北部和最西部地区短时强降水发生次数的日变化不明显；辽宁省南部地区短时强降水多出现在后半夜至早晨，其他地区短时强降水多出现在下午。

关键词: 短时强降水, 地形, 低空急流

Abstract: Using hourly precipitation data originated from digital information processing of recording paper data from 53 national weather stations during 1971-2003 and rainfall observation data from automatic weather stations during 2004-2014 in Liaoning province,the spatial-temporal characteristics of April -October short-time strong precipitation (STSP) in Liaoning province were investigated.The results show that the spatial distribution of the STSP frequencies during the period from 1971 to 2014 is consistent with the spatial distribution of the total annual precipitation,both are larger in the east and lower in the west of Liaoning province and have a close corresponding relation with the terrain of Liaoning province and the wind direction of the southwest low-level jet.More specifically,the annual frequencies of STSP which have well correspondence with a waterlogging-drought change in Liaoning province dramatically vary between 1.5 and 3.5 during 1971-2014.The STSP concentrates in July and August in Liaoning province and is dominantly distributed in Dandong.Furthermore,the frequency of ten-day STSP firstly increases and then decreases during June to August and its peak value appears in last July.At the same time,the change trend of STSP frequency varies among different areas.Moreover,the diurnal variation of STSP frequency has the feature of territoriality,under the influence of the terrain and the diurnal change of the low-level jet and is not obvious in the north and the westernmost of Liaoning province.The STSP tends to occur over the period from the middle of the night to the morning in the south of Liaoning province while it occurs more frequently in the afternoon in the rest of Liaoning province.

Key words: Short-time strong precipitation, Terrain, Low-level jet

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