| 基于云雷达和降水雷达资料的一次典型暖云降水成因及粒子类型演变 |
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| 引用本文： | 陈梓桐,李昀英.基于云雷达和降水雷达资料的一次典型暖云降水成因及粒子类型演变[J].大气科学学报,2022,45(1):87-98. |
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| 作者姓名： | 陈梓桐 李昀英 |
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| 作者单位： | 国防科技大学 气象海洋学院, 湖南 长沙 410073 |
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| 基金项目： | 国家自然科学基金资助项目（42075077）；国家重点研发计划项目（2018YFC1507604） |
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| 摘 要： | 针对2020年8月9日南京市一次典型对流性暖云降水过程,结合云雷达和双偏振降水雷达资料,研究了此次短时强降水的雷达回波特征和成因;基于雷达参量和模糊逻辑算法识别了水凝物粒子类型,并分析了降水过程中水凝物粒子的性质和演变.结果 表明:此次降水强度大、效率高,雷达观测的云体回波呈现低质心、强回波的热带型结构.正负速度对的出...
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| 关 键 词： | 暖云降水 模糊逻辑算法 水凝物粒子类型 |
| 收稿时间： | 2021/8/19 0:00:00 |
| 修稿时间： | 2021/11/8 0:00:00 |
Formation and hydrometeor type evolution of a typical warm precipitation based on cloud radar and precipitation radar data |
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| CHEN Zitong,LI Yunying.Formation and hydrometeor type evolution of a typical warm precipitation based on cloud radar and precipitation radar data[J].大气科学学报,2022,45(1):87-98. |
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| Authors: | CHEN Zitong LI Yunying |
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| Institution: | College of Meteorology and Oceanography, National University of Defense Technology, Changsha 410073, China |
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| Abstract: | Research of particles from cloud to rain is a fundamental approach to study the precipitation mechanism.Based on the cloud radar and dual-polarization precipitation radar data,this paper analyzes the echo characteristics and formation of a typical convective warm cloud precipitation process in Nanjing on August 9,2020.Using various radar parameters and fuzzy logic algorithm to identify the hydrometeor types,the evolution of hydrometeors in precipitation process is analyzed.Results show that the cloud with high precipitation efficiency behaves approximately a tropical structure with strong and low echo centricity.When the radar observes large spectrum width and linear depolarization ratio,strong updraft in the upper cloud and positive-negative velocity presenting vortex convergence,it indicates that heavy precipitation is about to occur.The precipitation particles identified by the fuzzy logic algorithm are mainly raindrops,with wet and dry snow particles at the top of the cloud.With a large number of cloud and precipitation particles in different sizes and complex orientations,the collision-coalescence process,as the main precipitation mechanism,is quickly completed under the action of the rising air flow and vortex convergence. |
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| Keywords: | warm cloud precipitation fuzzy logic algorithm hydrometeor type |
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