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孙建华, 赵思雄. 华南"94·6"特大暴雨的中尺度对流系统及其环境场研究I.引发暴雨的β中尺度对流系统的数值模拟研究[J]. 大气科学, 2002, 26(4): 541-557. DOI: 10.3878/j.issn.1006-9895.2002.04.11
引用本文: 孙建华, 赵思雄. 华南"94·6"特大暴雨的中尺度对流系统及其环境场研究I.引发暴雨的β中尺度对流系统的数值模拟研究[J]. 大气科学, 2002, 26(4): 541-557. DOI: 10.3878/j.issn.1006-9895.2002.04.11
Sun Jianhua, Zhao Sixiong. A Study of Mesoscale Convective Systems and Its Environmental Fields during the June 1994 Record Heavy Rainfall of South China Part I: A Numerical Simulation Study of Meso-β Convective System Inducing Heavy Rainfall[J]. Chinese Journal of Atmospheric Sciences, 2002, 26(4): 541-557. DOI: 10.3878/j.issn.1006-9895.2002.04.11
Citation: Sun Jianhua, Zhao Sixiong. A Study of Mesoscale Convective Systems and Its Environmental Fields during the June 1994 Record Heavy Rainfall of South China Part I: A Numerical Simulation Study of Meso-β Convective System Inducing Heavy Rainfall[J]. Chinese Journal of Atmospheric Sciences, 2002, 26(4): 541-557. DOI: 10.3878/j.issn.1006-9895.2002.04.11

华南"94·6"特大暴雨的中尺度对流系统及其环境场研究I.引发暴雨的β中尺度对流系统的数值模拟研究

A Study of Mesoscale Convective Systems and Its Environmental Fields during the June 1994 Record Heavy Rainfall of South China Part I: A Numerical Simulation Study of Meso-β Convective System Inducing Heavy Rainfall

  • 摘要: 选取1994年6月12日~13日的过程,在确定云雨、垂直运动的模拟基本正确的基础上,利用模式输出资料对β中尺度对流系统的结构进行分析研究.结果表明:低层的水汽辐合很强,并且出现在对流发展前2~3h,有利于对流的启动;随着对流系统的发展,最大的垂直运动向上扩展,饱和层和中性层也不断向上伸展,对流层中层的中性层结既是对流发展的结果,也可能是其维持机制之一;强对流系统发展较强时,低层(600hPa以下)是辐合,而中高层为高压辐散气流,高层的辐散气流对对流系统的发展、维持有一定的作用;系统发展最强时垂直方向是两个模态,发展和衰减阶段一般为多个模态;强对流系统发展的环境风场为低层有西南、东南和北风三支气流辐合,而高层以偏北风为主;切变线上对流系统的降雨量有3h左右的周期变化.

     

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