2021年11月初青海一次大范围寒潮天气过程分析  

Analysis of a Large-scale Cold Wave Weather Process in Qinghai on November 6,2021

作　　者：陈安琪 白吉萍 金庆发 Chen Anqi;Bai Jinping;Jin Qingfa(Tianjun Meteorological Bureau of Qinghai Province,Tianjun 817299,China;Wulan Meteorological Bureau of Qinghai Province,Wulan 817199,China;Zhiduo Meteorological Bureau of Qinghai Province,Zhiduo 815400,China)

机构地区：[1]青海省天峻县气象局,天峻817299 [2]青海省乌兰县气象局,乌兰817199 [3]青海省治多县气象局,治多815400

出　　处：《青海科技》2024年第3期143-148,161,共7页Qinghai Science and Technology

摘　　要：利用地面观测和NCEP再分析资料,对2021年11月6日青海一次大范围寒潮天气过程进行了分析。结果表明:(1)横槽转竖后,槽后西北气流几乎控制整个青海省,且全省上空有密集的等温线分布,风向与等温线之间的夹角超过了90°,说明冷空气影响青海省;(2)同以往的寒潮天气过程相比,这次寒潮降温幅度大,影响范围广泛;(3)前期异常偏暖和冷平流控制整个青海地区,说明冷空气强度较大,进而引发弱降雪和寒潮天气。针对寒潮天气的预报,重点关注冷空气堆积、寒潮爆发、寒潮强度和寒潮路径等预报着眼点,可为今后类似大范围寒潮天气过程预报提供参考依据。Using the data of ground observation and NCEP reanalysis,this article analyzes a large-scale cold wave weather process in Qinghai on November 6,2021.The results show that after the horizontal trough turns vertical,the northwest airflow behind the trough almost controls the entire Qinghai Province,and there is a dense distribution of isotherms over the province.The angle between the wind direction and the isotherm exceeds 90°,indicating that cold air affects Qinghai Province.Compared with previous cold wave weather processes,the cooling range of this cold wave in Qinghai Province is relatively large and has a wide range of impacts.The 24-hour variable pressure in most areas of Qinghai Province is mainly positive,and cold air has invaded and had an impact on most areas of Qinghai Province.The abnormal warming and cold advection in the early stage controlled the entire Qinghai region,indicating that the intensity of cold air was relatively high,leading to cold waves,weak snowfall,and cold wave weather.For the prediction of cold wave weather,it is necessary to focus on the accumulation of cold air,the outbreak of cold waves,the intensity of cold waves,and the focus of cold wave path prediction.

关 键 词：寒潮天气 环流背景 预报着眼点 青海省 

分 类 号：P642.23[天文地球—工程地质学]