气象Issue(2)：133-142,10.DOI:10.7519/j.issn.1000-0526.2015.02.001
我国阵风锋类型与产生机制分析及其主观识别方法
Generating Mechanism and Type of Gust Front and Its Subj ective Identification Methods
摘要
Abstract
This paper summarizes the research results about gust fronts in China in recent years,illustrates their spatial structures,types and characteristics,discusses formation mechanisms for narrowband echoes of gust fronts,proposes the subjective recognition methods to gust fronts.The results show that based on the radar data analysis,gust fronts can be divided into two types:The static gust front and the sport gust front of the original thunderstorm,and the former can be divided further into two subtypes.The feedback effect of gust fronts for the original thunderstorm is completely different because of their different types. The formation mechanism for narrowband echoes of gust fronts can be briefed as two categories:The first is Bragg Scattering caused by the pulsation of atmospheric refraction index gradient,and the second is Par-ticle Scattering caused by insects.Using the characteristics of reflectivity factor and radial velocity,we can identify the location and scope of gust fronts and can forecast their extrapolation.Because gust fronts are close to the ground in the lower atmosphere,we should use a lower elevation of radar data to identify them.Using the radar echo characteristics of gust fronts,the formation,development and dissipation can be comprehen-sively identified,matching up the variation of mesoscale convective clouds and arcus cloud lines of the high-resolu-tion satellite visible cloud images and combined with surface mesoscale observation data.关键词
阵风锋/窄带回波/大气折射指数梯度脉动/昆虫散射/雷暴生成演变Key words
gust front/narrowband echo/pulsation of atmospheric refraction index gradient/insect scat-tering/generation and evolution of thunderstorms分类
天文与地球科学引用本文复制引用
席宝珠,俞小鼎,孙力,许洁..我国阵风锋类型与产生机制分析及其主观识别方法[J].气象,2015,(2):133-142,10.基金项目
国家重点基础研究发展计划（973计划）（2013CB430103）和中国气象局强对流专家团队项目共同资助 （）
