摘要
对闽东干旱的成因和干旱的环流形势进行了探讨,着重分析了夏旱期间人工增雨作业的天气形势以及不同形势、不同云型下的降水情况。结果表明:闽东干旱的形成与大型环流形势、地理因素、土壤植被等有关,平均而言,沿海干旱明显多于内陆山区;夏季发生干旱的机率最大而且强度级别高,西太平洋副热带高压是致旱的主要天气系统;在夏季,台风型(T)、弱流场型(R)是进行人工增雨作业的优势天气型,Cb、Cu、Sc云是开展人工增雨作业比较适合的作业云。这些结果为夏旱期间开展人工增雨作业提供了理论依据。
The causes of droughts and the circulation patterns in drought periods over the eastern Fujian Province are investigated.The favorable weather conditions for precipitation enhancement operation during summer drought periods are further analyzed.The results show that droughts over the eastern Fujian are related to the large-scale circulation,geographical factors,soil,vegetation and so on.It is also revealed that in summer,the two types of circulation patterns(typhoon and weak weather system) are favorable fo...
出处
《气象科技》
2005年第S1期36-39,共4页
Meteorological Science and Technology
基金
福建省中尺度灾害性天气预警系统三期工程
福建省宁德市科技局资助
关键词
干旱
人工增雨
天气形势
drought
precipitation enhancement
weather condition
