张舒阳,闵锦忠.2013年6月23日江淮地区梅雨锋暴雨的发展和维持机制.气象科学,2018,(6):707-718 ZHANG Shuyang,MIN Jinzhong.Development and maintenance mechanism of Meiyu front rainstorm in Jianghuai area on 23 June 2013.Journal of the Meteorological Sciences,2018,(6):707-718
2013年6月23日江淮地区梅雨锋暴雨的发展和维持机制
Development and maintenance mechanism of Meiyu front rainstorm in Jianghuai area on 23 June 2013
投稿时间:2018-01-08  修订日期:2018-04-03
DOI:10.3969/2018jms.0050
中文关键词:  梅雨锋暴雨  MCS  高空槽  凝结反馈  抽吸作用
英文关键词:Meiyu front rainstorm  MCS  Upper trough  Condensation feedback  Pumping action
基金项目:国家重点研发计划资助(2017YFC1502100)
作者单位E-mail
张舒阳 南京信息工程大学 气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心, 南京 210044
南京信息工程大学 大气科学学院, 南京 210044 
 
闵锦忠 南京信息工程大学 气象灾害教育部重点实验室/气候与环境变化国际合作联合实验室/气象灾害预报预警与评估协同创新中心, 南京 210044
南京信息工程大学 大气科学学院, 南京 210044 
minjz@nuist.edu.cn 
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中文摘要:
      利用WRF模式对2013年6月23日江淮地区的梅雨锋暴雨过程进行了数值模拟,并利用模式输出的细网格资料进行诊断分析。结果表明:地面梅雨锋、高低空急流耦合、低层辐合高层辐散以及中层短波槽的配置有利于暴雨的发生发展;暴雨主要由两个中尺度对流系统的发展、维持、合并造成;低层辐合、高层辐散为暴雨提供了动力条件;高温高湿环境为暴雨提供水汽及热力条件。水汽及凝结潜热的诊断分析表明,高空槽的抽吸作用与潜热反馈的配合表现为两个方面,一是向中层输送水汽,使最大凝结发生在中层,加强低层的正涡度中心,二是向高层输送源源不断的热量,避免凝结潜热在中层堆积,有利于不稳定形势和上升运动的维持,从而影响中尺度对流系统的移动和发展。
英文摘要:
      The WRF model is used to simulate the Meiyu front rainstorm process in the Jianghuai area on June 23, 2013, and the fine mesh data output from the model was used for diagnostic analysis. Results show that the configuration of surface Meiyu front, coupling of upper and lower jets, lower level convergence and upper level divergence, and short wave trough in middle troposphere are conducive to the occurrence and development of rainstorm. The rainstorm is mainly caused by the development, maintenance and merger of two mesoscale convective systems; The lower level convergence and upper level divergence provide the dynamic condition for the rainstorm. High temperature and humidity provide water vapor and thermal conditions for the rainstorm. The diagnostic analysis of water vapor and latent heat shows that the combination of the suction effect of the high-altitude trough and the latent heat feedback is manifested in two aspects. First, the water vapor is transported to the middle layer, so that the maximum condensation occurs in the middle layer, and the positive vorticity center of the lower layer is strengthened. The second is to deliver a steady stream of heat to the upper level, avoiding the accumulation of latent heat in the middle layer, which is conducive to the maintenance of unstable and rising movements, thus affecting the movement and development of mesoscale convective systems.
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