遼寧夏季積云降水發生頻率及人工影響潛力分析
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P481

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中國氣象局、吉林省人民政府人工影響天氣聯合開放實驗室科學基金,遼寧省科技廳“十五”重點科技攻關項目“人工影響積云降水技術的研究”資助


Analysis of Cumulus Precipitation Frequency and Potential of Rain Enhancement in Summer in Liaoning
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    摘要:

    用遼寧14個臺站的常規地面觀測記錄,統計分析了6~8月各類積云的發生頻率及其降水特征,結合沈陽站的探空資料,分析了各類積云的降水能力和人工影響潛力。結果表明:①遼寧夏季積云出現概率很大,每站年均41.5d,占夏季總云日的50%以上;②平均每年每站有11d以上的積云降水,為夏季總降水日數的36.9%;③各地區平均積云降水量占總降水量的33.5%,其中積云暴雨量占總暴雨雨量的43.1%;④有層狀云伴隨出現的積云、積雨云出現的概率較大,但多數情況降水效率不很高,具有較多的人工增雨作業機會和潛力,可以作為人工催化的主要作業對象。

    Abstract:

    Based on the observations from 14 stations in Liaoning Province and the radiosonde data from Shenyang Station, analysis is conducted on the occurrence frequency of various cumulus and its precipitation characteristics from June to August, as well as the precipitation probabilities of various cumulus and their potential affected by artificial. The results indicates that: (1) The probability of the cumulus emergence is very high in summer in Liaoning, the annual average rate is 41.5 days and it is over 50% of the total cloud days in summer. (2) There is more than 11 rainy days caused by cumulus on average, and it is 36.9% of the total rainy days in summer. (3) The area averaged cumulus precipitation is 33.5% of the total precipitation, in which the rainfall produced by cumulus heavy rains is 43.1% of the total. (4) The probability of cumulus along with stratiform clouds is quite high, but the precipitation efficiency is not very high in most of situations. There is quite high potential and a great deal of operation opportunities for rain enhancement in Liaoning Province

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周德平 耿素江 楊旭.遼寧夏季積云降水發生頻率及人工影響潛力分析[J].氣象科技,2003,31(4):243~247

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