| 摘要: |
| 利用常规观测资料和MICAPS 4版的V-3θ图，选取了2018年贵州冰雹、暴雨和大雪3次转折性天气过程，对 V-3θ图进行了特征检验和简单应用，得出结论如下：①V-3θ图能很好反映大气能量结构变化，其典型特征均有较好体现：超低温结构、顺滚流、θ线多折拐等；②不同转折性天气其 V-3θ图特征也有所不同：冰雹天气的滚流效应最突出，暴雨、大雪依次减弱；暴雨和大雪对θsed与θ*线准平行且近重合要求更高；而冰雹天气过程对对流层顶出现深厚超低温结构更为敏感；③当环流形势较弱，常规天气分析难以判断转折性天气时，可利用 V-3θ图特征进行辅助预报。 |
| 关键词: V-3θ图；大气能量结构；转折性天气；预报应用 |
| DOI： |
| 投稿时间：2021-01-29 |
| 基金项目:贵州省气象局科研业务项目：V-3θ图在贵州冰雹天气中的特征检验及应用初探 |
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| Application of V-3θ Chart Based on Collapse Theory in Three Transitional Weather Processes in Guizhou |
| GU Tianhong,ZHU Yulei,LI Yanlin,LI Li,WU Zhengmin |
| (Guizhou Meteorological Observatory, Guiyang 550002 , China;Zunyi Meteorological Bureau, Zunyi 563000 , China) |
| Abstract: |
| Using conventional observational data and the V-3θ chart that comes with MICAPS 4 version, we selected three times of turning weather in Guizhou including hail, heavy rain and heavy snow , and carried out feature inspection and simple application on the V-3θ chart, and the conclusions are as follows: ①The V-3θ chart can well reflect the changes in the energy structure of the atmosphere, and its typical characteristics are well reflected: ultra-low temperature structure, tumble flow, and multiple bending of the θ line; ②V-3θ in different turning weather, the characteristics of the map are also different: the tumble effect of hail weather is the most prominent, with heavy rain and heavy snow sequentially weakening; heavy rain and heavy snow have higher requirements for the θsed and θ* lines to be quasi-parallel and close to coincidence; while the hail weather process has a greater impact on the appearance of deep and ultra-low temperature structures in the troposphere. It is sensitive; ③When the circulation situation is weak and it is difficult to judge the turning weather by conventional weather analysis, the V-3θ chart feature can be used for auxiliary forecasting. |
| Key words: V-3θ chart； atmospheric energy structure； turning weather； forecast application |
