呼和浩特市一次飑线系统分析  

Diagnosis Analysis About a squall-line in Hohhot

作　　者：张敏 Zhang Min(Inner Mongolian Meteorological Observatory,Inner Mongolia Hohhot 010051)

机构地区：[1]内蒙古气象台,内蒙古呼和浩特010051

出　　处：《内蒙古气象》2018年第2期8-11,共4页Meteorology Journal of Inner Mongolia

摘　　要：利用常规探测资料、多普勒雷达资料、高时空密度自动气象站地面观测网等实况资料,对2017年8月7日呼和浩特地区一次飑线过程进行详细分析,结果表明:(1)由于常规观测站资料时空分辨率低,数值预报难以准确描述中小尺度系统,因此在实际业务中,很难在短时预报中给出飑线的发生发展预报;(2)常规探空资料计算的CAPE值对于飑线发生潜势的指示性是非常有限的;(3)目前业务中,对飑线的预报只能通过大尺度环流背景结合加密自动气象站,以及短时临近雷达监测来实现;(4)高空槽前和东北冷涡后部的西北和偏北气流汇合南下,以及低空切变线带来的偏南气流北送,是这次飑线形成的环流背景。A squall-line in Hohhot occurred before the major meteorological support event in Aug 7th, 2017 years is analyzed using radiosonde data, routine observational data, automatic meteorological station data and radar data. The results show that, （1）because the numerical model cannot capture the mesoscale and microscale synoptic system well and the spatial and temporal resolution of routine observational data is low, it is hard to forecast the occurrence and development squall-line in local short range weather forecast;（2）the potential prediction of squall-line based on CAPE calculated by radiosonde data has many limits;（3）the squall-line forecast depends mainly on the analysis of large-scale circulation background, automatic meteorological station data and radar monitoring; （4） the confluence and moving southward of the northwest flow in the front of upper trough and north flow in the back of the northeast cold vortex, combining with the south flow moving northward brought by the low-altitude shear, are the circulation background of this squall-line.

关 键 词：飑线 东北冷涡 切变线 基本反射率 

分 类 号：P458[天文地球—大气科学及气象学]