阜新地区夏季雷暴大风的天气学模型和物理量参数研究

Study of Synoptic Model and Physical Parameters of Thunderstorm Gale in Summer in Fuxin Area

利用2009-2017年阜新地区2个常规自动站和35个4要素加密自动站资料,分析了阜新地区夏季雷暴大风的气候特征、天气系统配置模型和物理量参数特征。结果表明:(1)阜新地区夏季雷暴大风的时空分布很不均匀,月变化特征显著,主要发生在6月;日变化规律也非常明显,主要集中在13:00-21:00。空间分布上有1个高发中心和2个次发中心。(2)根据500hPa天气形势分析,阜新地区夏季雷暴大风天气形势可归类为高空冷涡型、高空冷槽型、西北气流型、副高西北部型4个类型。(3)副高西北部型以热力因素为主、动力因素为辅,高空冷涡型动力、热力因素都很重要,高空冷槽型以动力因素为主、热力因素为辅,西北气流型冷空气下沉造成的冲击力很重要。

The climate characteristics,weather system configuration model and physical parameter characteristics of thunderstorm gale are analyzed in summer in Fuxin area,based on the data of two conventional automatic stations and thirty-five four element encrypted automatic stations in Fuxin area from 2009 to 2017.The results show that:(1)The temporal and spatial distribution of thunderstorm gales in Fuxin area is very uneven,and the monthly variation is significant,mainly in June;the daily variation is also very obvious,mainly during 13:00pm to 21:00pm.There are a center of high incidence and two centers of secondary incidence in spatial distribution.(2)According to the circulation situation of 500hPa,it can be classified into four types,namely upper cold vortex type,upper cold trough type,northwest airflow type and northwest of subtropical high type.(3)The northwest of subtropical high type is dominated by thermal factors,supplemented by dynamic factors.Thermal factors are as consequential as dynamic factors in the upper cold vortex type.The upper cold trough type is dominated by dynamic factors,supplemented by thermal factors.The impact caused by the sinking of cold air is very important in the northwest airflow type.