廣東東莞不同類型云的雨滴譜和降水特征
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國家自然科學基金面上項目41075023、廣東省氣象局科研項目2012B24資助


Characteristics of Raindrop Size Distribution and Precipitation Produced by Clouds of Different Types over Dongguan
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    摘要:

    利用設置在東莞站的Parsivel激光降水粒子譜測量系統于2010年獲取的觀測資料,對數據有效性進行驗證并開展15次降水的特征參量分析。層狀云降水(S)、積層混合云降水(M)、積雨云降水(C)各選取兩次典型過程,對各種特征參量之間的相關性和雨滴譜特征進行細致分析,結果表明:平均粒子直徑、平均雨強、平均雨水含量、過程最大立方根直徑、過程最大雨強的分布規律明顯,基本遵循“C>M>S”的規律;同種類型降水的雨滴譜型非常接近,層狀云存在單峰譜,混合云和積狀云是明顯的雙峰譜或多峰譜; M、C型降水的大雨滴明顯多于S型降水;雨水含量與雨強的相關性最好,雷達反射率因子與雨強的相關性次之;層狀云降水主要為1 mm以下小粒子,積狀云和積層混合云降水雨滴譜寬較大,1 mm以上大粒子數濃度較大。

    Abstract:

    The characteristics of 15 events precipitation in 2010 are analyzed based on the data observed by the raindrop disdrometer in Donguan, Guangdong Province. Six typical cases, including 2 stratiform precipitation (S), 2 Mixed convective and Stratiform precipitation (M), and 2 convective precipitation (C) events, are selected to analyze the relevance of various feature parameters and the characteristics of rain drop size distribution. The results show that the regularities of the distribution of parameters, including average particle diameter, average rainfall intensity, average rainwater content, the largest cube root diameter, and the most rainfall intensity, are C>M>S; the raindrop spectrum models of the precipitation produced by the same type of clouds are very close to each other, and there is a single peak spectrum in 2 Stype precipitation. The raindrop size distributions of Mand Ctype precipitation are obvious 2 or multipeak model. There are more bigger raindrops in Mand Ctype precipitation than in Stype precipitation; the relevance between rainwater content and rainfall intensity is the best, and that between radar reflectivity and rainfall intensity is the next; there are mainly small particles below 1 mm in Stype precipitation; the widths of raindrop spectrum of Mand Ctype precipitation are bigger than that of Stype precipitation, and there are more particles of over 1 mm.

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高建秋,阮征,游積平,王剛.廣東東莞不同類型云的雨滴譜和降水特征[J].氣象科技,2015,43(6):1085~1094

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  • 收稿日期:2014-12-09
  • 定稿日期:2015-07-02
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  • 在線發布日期: 2015-12-29
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