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刘香娥, 高茜, 何晖, 李杰, 李兴宇, 贾星灿. 一次冻雨过程云物理特征的数值模拟[J]. 气候与环境研究, 2017, 22(2): 191-202. DOI: 10.3878/j.issn.1006-9585.2016.15238
引用本文: 刘香娥, 高茜, 何晖, 李杰, 李兴宇, 贾星灿. 一次冻雨过程云物理特征的数值模拟[J]. 气候与环境研究, 2017, 22(2): 191-202. DOI: 10.3878/j.issn.1006-9585.2016.15238
Xiang'e LIU, Qian GAO, Hui HE, Jie Li, Xingyu Li, Xingcan JIA. A Numerical Simulation on Cloud Physical Characteristics of Freezing Rain[J]. Climatic and Environmental Research, 2017, 22(2): 191-202. DOI: 10.3878/j.issn.1006-9585.2016.15238
Citation: Xiang'e LIU, Qian GAO, Hui HE, Jie Li, Xingyu Li, Xingcan JIA. A Numerical Simulation on Cloud Physical Characteristics of Freezing Rain[J]. Climatic and Environmental Research, 2017, 22(2): 191-202. DOI: 10.3878/j.issn.1006-9585.2016.15238

一次冻雨过程云物理特征的数值模拟

A Numerical Simulation on Cloud Physical Characteristics of Freezing Rain

  • 摘要: 运用中尺度数值模式WRF3.5.1对2011年1月1日贵州境内的一次冻雨天气过程进行了数值模拟,研究了本次过程的大气层结、冻雨区云系的宏微观结构和云物理特征,初步分析了冻雨形成的云微物理过程和成因。结果表明,贵州境内的冻雨区(26°N~29°N)具有冷性和部分“冷-暖-冷”的温度层结,在高层没有显著的冰相粒子,冻雨区是相对较强的水汽辐合中心,丰富的水汽输送在冷性的环境条件下形成云滴,进而碰并产生雨滴,过冷雨水主要通过暖雨过程形成;雨滴继续下落至近地层并保持过冷雨水形式,最后接触到低于0℃的物体或地面,迅速冻结而产生地面冻雨。

     

    Abstract: The WRF3.5.1 model is used to simulate a freezing rain process that occurred on 1 January 2011 in Guizhou Province. The atmospheric stratification and macro and micro cloud structures and cloud physical characteristics are analyzed. Results show that in Guizhou Province, the atmosphere above the freezing rain area (26°N-29°N) is characterized by a cold and partial "cold-warm-cold" temperature stratifications. There were no significant ice phase particles at the top; the freezing rain area corresponded to a relatively strong water vapor convergence center, and cloud droplets formed under the cold condition with abundant water vapor. These cloud droplets collided during their falling, and supercooled raindrops mainly formed during the warm rain process. Raindrops stayed supercooled and fell to the ground. When they were exposed to below zero degrees of objects or on the ground, freezing rain quickly formed.

     

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