青海省2021年11月5日至7日寒潮天气过程分析  

Analysis of Cold Wave Weather Process from November 5 to 7,2021

作　　者：王有莲 韦淑侠[1] 谢天蓉 巨海晨 王成雄 徐亮[1] Wang Youlian;Wei Shuxia;Xie Tianrong;Ju Haichen;Wang Chengxiong;Xu Liang(Qinghai Meteorological Station,Xining 810001,China)

机构地区：[1]青海省气象台,西宁810001

出　　处：《青海科技》2023年第3期159-163,共5页Qinghai Science and Technology

基　　金：青海省重大科技专项“青海高原氧环境监测预报技术集成、提升与示范”(项目编号:2021-SF-141-2)子课题“青海大气氧环境预报发布业务系统建设”。

摘　　要：受高空低涡、高空槽、地面冷高压和地面冷锋的共同影响,2021年11月5日至7日青海省出现了一次自西向东寒潮天气过程。利用MICAPS常规气象资料分析表明,造成本次寒潮天气的主要成因为:前期冷空气在巴尔喀什湖附近堆积,伴随着高空横槽发展转竖,引导冷空气向东南移动。高空冷中心接近青海省北部,且冷平流很强;此次寒潮过程地面冷高压中心强度较强,最强达到1062.5 hPa,在秋季寒潮中属于影响较大的寒潮天气,随着冷高压东移南压,推动地面冷锋沿高压外围影响青海地区。在此次过程中,前期增温为后期寒潮降温提供了空间,另外高空强冷平流为地面降温提供有利条件。总结分析结果,对今后准确预报类似寒潮天气过程,提高重大天气过程气象服务的质量和效益具有重要的参考作用。Under the combined influence of high-altitude low vortex,high-altitude trough,ground cold high pressure and ground cold front,a cold wave weather process from west to east occurred in Qinghai Province from November 5 to 7,2021.The analysis of conventional meteorological data using MICAPS shows that the main cause of this cold wave weather is the accumulation of cold air near Lake Balkash in the early stage,accompanied by the development of high-altitude troughs,which guides the cold air to move southeast.The high-altitude cold center is close to the northern part of Qinghai Province,and the cold advection is very strong.At the same time,the strength of the ground cold high pressure center in the cold wave process is strong,the strongest reaching 1062.5 hPa,which is a cold wave weather with a large impact in the autumn cold wave.As the cold high pressure moves from east and south,the ground cold front affects Qinghai along the periphery of the high pressure.In this process,the early warming provides space for the late cold wave cooling,and the high-altitude strong cold advection provides favorable conditions for ground cooling.Summarizing the analysis results has an important reference role for accurately forecasting similar cold wave weather processes in the future and improving the quality and efficiency of meteorological services in major weather processes.

关 键 词：寒潮 横槽 冷平流 大风 

分 类 号：P425.54[天文地球—大气科学及气象学]