北京短歷時(shí)強(qiáng)降雨的時(shí)空分布
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公益性行業(yè)專項(xiàng)“大城市多源氣象信息集成管理與綜合應(yīng)用技術(shù)”(GYHY201206031)資助


Spatial and Temporal Distribution of ShortLasting Heavy Rainfall in Beijing
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    摘要:

    利用北京地區(qū)157個(gè)人工站和自動(dòng)站觀測(cè)資料,對(duì)北京地區(qū)短歷時(shí)強(qiáng)降雨的時(shí)間、空間分布特征以及與年總降水量的關(guān)系進(jìn)行分析,結(jié)果表明:①2007—2012年,短歷時(shí)強(qiáng)降雨的次數(shù)大體呈現(xiàn)遞增趨勢(shì),但各年發(fā)生的次數(shù)差異較大;②從時(shí)空分布特征來(lái)看, 短歷時(shí)強(qiáng)降雨最易發(fā)生在7月,時(shí)段集中在傍晚前后和凌晨,而發(fā)生地點(diǎn)集中在北京西山前的平原地區(qū)包括昌平中部東部、順義西部、石景山區(qū)、豐臺(tái)區(qū)西部、房山東部南部;③從短歷時(shí)強(qiáng)降雨與年降水量的關(guān)系來(lái)看,短歷時(shí)強(qiáng)降雨發(fā)生次數(shù)多的年份降水量也高,短歷時(shí)強(qiáng)降雨對(duì)于年降水量的貢獻(xiàn)較大。

    Abstract:

    Using the data from 157 manual observation stations and AWS’s, the spatial and temporal characteristics of the shortlasting heavy rainfall in Beijing are analyzed. The results show that: (1) The number of shortlasting heavy rainfall events increased generally from 2007 to 2012 There are large differences among years. (2) From the spatial and temporal characteristics, it is found that the shortlasting heavy rainfall occurred more frequently in July, evening and early morning, in the plain area in front of the Xishan mountain, including the central and east parts of Changping, the western Shunyi, Shijingsha, western Fengtai, and southeastern Fangshan districts. (3) The relationship between shortlasting heavy rainfall and annual total rainfall is examined, and it is found that the annual total rainfall was larger in the year with more shortlasting heavy rainfall events, and the shortlasting heavy rainfall made an important contribution to annual total rainfall.

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李琛,李津,張明英,張德山.北京短歷時(shí)強(qiáng)降雨的時(shí)空分布[J].氣象科技,2015,43(4):704~708

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  • 收稿日期:2014-07-18
  • 定稿日期:2014-12-30
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  • 在線發(fā)布日期: 2015-08-28
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