2014年8月18~20日宁波暴雨过程综合分析
Comprehensive Analysis of the Heavy Rainfall Process in Ningbo from August 18 to 20, 2014

DOI: 10.12677/CCRL.2021.101002, PP. 12-17

Keywords: 暴雨，高低空急流，水汽通量辐合，不稳定能量
Heavy Rainfall, Upper and Low-Level Jets, Convergence of Water Vapor Flux, Unstable Energy

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Abstract:

本文采用常规地面观测资料、每日4次的1？ × 1？ NCEP FNL资料、红外卫星云图和雷达径向速度资料等，对2014年8月18日至20日出现在宁波地区的暴雨天气过程进行了探讨。通过分析天气形势，讨论抬升机制、水汽条件、层结不稳定性等因素的作用，发现高空低槽的东移南压导致冷暖气流交汇是本次暴雨的系统背景，在此基础上，高低空急流激发上升运动，低层低涡提供水汽辐合，以及不稳定能量高值区的配合对应，共同导致了此次天气过程。
Based on the conventional ground observation data, NCEP FNL 1？ × 1？ reanalysis data four times a day, infrared satellite cloud image and radar radial velocity data, the heavy rainfall from August 18 to 20, 2014 in Ningbo was discussed in this article. By analyzing the weather situation and the effect of uplift mechanism, water vapor condition, stratification instability, etc., it was found that the convergence of cold and warm airflow caused by the southeastward movement of the upper low trough was the system background of this heavy rainfall, on this basis, the ascending motion of the upper and low-level jets, the water vapor convergence provided by low-level vortex , and the coordination of the high-value area of unstable energy led to this weather process.

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