北京短歷時強降雨的時空分布
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公益性行業專項“大城市多源氣象信息集成管理與綜合應用技術”(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157個人工站和自動站觀測資料,對北京地區短歷時強降雨的時間、空間分布特征以及與年總降水量的關系進行分析,結果表明:①2007—2012年,短歷時強降雨的次數大體呈現遞增趨勢,但各年發生的次數差異較大;②從時空分布特征來看, 短歷時強降雨最易發生在7月,時段集中在傍晚前后和凌晨,而發生地點集中在北京西山前的平原地區包括昌平中部東部、順義西部、石景山區、豐臺區西部、房山東部南部;③從短歷時強降雨與年降水量的關系來看,短歷時強降雨發生次數多的年份降水量也高,短歷時強降雨對于年降水量的貢獻較大。

    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.北京短歷時強降雨的時空分布[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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  • 在線發布日期: 2015-08-28
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