| 摘要: |
| 利用Micaps系统常规资料和NCEP/NCAR 再分析资料对2017年2月和2016年3月黔南两次寒潮天气过程进行对比分析，发现它们相同之处：中层低槽冷中心气温在-40℃以下是这两次寒潮强度相接近的关键条件，水汽通量散度辐合区和垂直速度上升区和降水中心分布相对应，降水相态由雨到雪的转变出现在冷空气影响1-2天后；不同之处：地面蒙古冷高压中心强度的较大差异并没有造成寒潮降幅、最低气温等特点的明显差异，出现冰雹时间和区域与CAPE大值并不一定是对应关系。 |
| 关键词: 寒潮;冰雹;暴雨 |
| DOI： |
| 投稿时间：2018-05-30修订日期：2018-10-27 |
| 基金项目: |
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| Comparative Analysis of Two Cold Wave Processes in the Late Winter and Early Spring in Qiannan |
| PAN Qixue,ZHAO Jie,GAO Hongmei |
| (Qiannan Meteorological Bureau) |
| Abstract: |
| Using the Micaps system routine data and NCEP/NCAR reanalysis data, a comparative analysis of the two cold wave weather processes in Qiannan in February 2017 and March 2016 revealed that they have the same similarities: the temperature in the middle low trough cold center is below -40 ℃, it is the key condition that the two cold wave intensity are close to each other. The water vapor flux divergence zone and the vertical velocity rise zone correspond to the precipitation center distribution, and the precipitation phase changes from rain to snow after 1-2 days of cold air influence. The difference: the large difference in the strength of the cold high-pressure center of the ground Mongolia does not cause significant differences in the characteristics of cold wave drop and minimum temperature. The occurrence of hail time and regional and CAPE values are not necessarily corresponding. |
| Key words: Cold wave; Hail; Heavy rain |
