利用宁波机场地面气象观测资料和NCEP/FNL 1˚ × 1˚再分析资料对2024年2月21~22日宁波机场出现的一次强对流天气过程进行分析,结果表明:此次过程是一次典型的高架雷暴,发生在地面冷锋后部。近地层大气层结稳定,低层有一明显逆温层,...利用宁波机场地面气象观测资料和NCEP/FNL 1˚ × 1˚再分析资料对2024年2月21~22日宁波机场出现的一次强对流天气过程进行分析,结果表明:此次过程是一次典型的高架雷暴,发生在地面冷锋后部。近地层大气层结稳定,低层有一明显逆温层,西南暖湿气流从逆温层顶开始抬升。过程发生时,中高层为高空槽前强盛的西南急流控制,配合850 hPa槽线和锋区。低层暖湿空气沿冷垫之上的强锋区做斜升运动,以及强的环境风垂直切变,均有利于强对流天气的触发、发展和维持。前期的降水、强盛西南急流源源不断的水汽输送,以及水汽局地的辐合,为此次过程提供了充足的水汽。To analysis the process of a severe convective weather that occurred at Ningbo Airport in February 21~22, 2024, by using surface meteorological observation data of Ningbo Airport and NECP/FNL 1˚ × 1˚ reanalysis data. The results show that this process is a typical elevated thunderstorm that occurred behind the surface cold front. The atmospheric stratification is stable near the surface layer, and there is an obvious inversion layer in the lower atmosphere. The warm and humid southwest airflow rises from the top of the inversion layer. When the process occurs, the middle and upper levels are controlled by the strong southwest jet stream in front of the high-level trough, with the trough line and frontal zone at 850 hPa. The inclined upward movement of low-level warm and humid air along the strong frontal zone above the cold air cushion and the strong vertical shear of environmental winds, are conducive to the triggering, development, maintenance and of severe convective weather. The precipitation in the early stage, continuous water vapor transport from the strong southwest jet stream, and local convergence of water vapor provided sufficient water vapor for this process.展开更多
通过对2012~2023年宁波机场气象观测资料进行统计,分析影响宁波机场的大风天气基本特征,进行归纳总结,以期对实际大风预报工作起到一定的指导作用。结果表明,宁波机场大风天气年平均5天;全年大风主要活动期在夏季的7~8月,6月尚未出现大...通过对2012~2023年宁波机场气象观测资料进行统计,分析影响宁波机场的大风天气基本特征,进行归纳总结,以期对实际大风预报工作起到一定的指导作用。结果表明,宁波机场大风天气年平均5天;全年大风主要活动期在夏季的7~8月,6月尚未出现大风天气;大风有明显的日变化特征,主要集中在白天;冷锋大风、雷暴大风、台风大风和低压大风是宁波机场的主要大风类型,其中以雷暴大风最为频繁,但其持续时间最短,台风大风平均持续时间最长。By statistically analyzing the meteorological observation data of Ningbo Airport from 2012 to 2023, the basic characteristics of gale weather affecting Ningbo Airport were studied and summarized, with the aim of providing guidance for actual gale weather forecasting work. The results indicate that the average number of gale weather days is 5 per year at Ningbo Airport;The main activity period of gale weather throughout the year is from July to August, with no gale weather observed in June;Strong winds have obvious diurnal variation characteristics, mainly concentrated during the day;Cold front gales, thunderstorm gales, typhoon gales and low-pressure gales are the main types of gale weather at Ningbo Airport. Among them, thunderstorm gales are the most frequent but have the shortest duration, while typhoon gales have the longest average duration.展开更多
利用常规观测资料、NCEP1°×1°的再分析资料和多普勒雷达数据对2016年12月21日发生在宁波机场上空的一次冬至雷暴天气过程进行了分析。结果表明,本次过程是由高空槽配合低层低涡及地面倒槽共同发展的结果;前期宁波机场中...利用常规观测资料、NCEP1°×1°的再分析资料和多普勒雷达数据对2016年12月21日发生在宁波机场上空的一次冬至雷暴天气过程进行了分析。结果表明,本次过程是由高空槽配合低层低涡及地面倒槽共同发展的结果;前期宁波机场中低层的高水汽通量值为强对流的发生创造了水汽条件;宁波机场上空大气不稳定参数表现为:ΔT_(850-500)达到28℃,K指数为36~37℃,θse值为336 K;强暖平流(900 h Pa:10×10^(-5)K/s,700 h Pa:10×10^(-5)K/s,300 h Pa:20×10^(-5)K/s)为本场雷暴发生提供充足能量;低层900 h Pa以上均为上升运动,有利于水汽和能量向高层输送,形成位势不稳定层结。展开更多
文摘利用宁波机场地面气象观测资料和NCEP/FNL 1˚ × 1˚再分析资料对2024年2月21~22日宁波机场出现的一次强对流天气过程进行分析,结果表明:此次过程是一次典型的高架雷暴,发生在地面冷锋后部。近地层大气层结稳定,低层有一明显逆温层,西南暖湿气流从逆温层顶开始抬升。过程发生时,中高层为高空槽前强盛的西南急流控制,配合850 hPa槽线和锋区。低层暖湿空气沿冷垫之上的强锋区做斜升运动,以及强的环境风垂直切变,均有利于强对流天气的触发、发展和维持。前期的降水、强盛西南急流源源不断的水汽输送,以及水汽局地的辐合,为此次过程提供了充足的水汽。To analysis the process of a severe convective weather that occurred at Ningbo Airport in February 21~22, 2024, by using surface meteorological observation data of Ningbo Airport and NECP/FNL 1˚ × 1˚ reanalysis data. The results show that this process is a typical elevated thunderstorm that occurred behind the surface cold front. The atmospheric stratification is stable near the surface layer, and there is an obvious inversion layer in the lower atmosphere. The warm and humid southwest airflow rises from the top of the inversion layer. When the process occurs, the middle and upper levels are controlled by the strong southwest jet stream in front of the high-level trough, with the trough line and frontal zone at 850 hPa. The inclined upward movement of low-level warm and humid air along the strong frontal zone above the cold air cushion and the strong vertical shear of environmental winds, are conducive to the triggering, development, maintenance and of severe convective weather. The precipitation in the early stage, continuous water vapor transport from the strong southwest jet stream, and local convergence of water vapor provided sufficient water vapor for this process.
文摘通过对2012~2023年宁波机场气象观测资料进行统计,分析影响宁波机场的大风天气基本特征,进行归纳总结,以期对实际大风预报工作起到一定的指导作用。结果表明,宁波机场大风天气年平均5天;全年大风主要活动期在夏季的7~8月,6月尚未出现大风天气;大风有明显的日变化特征,主要集中在白天;冷锋大风、雷暴大风、台风大风和低压大风是宁波机场的主要大风类型,其中以雷暴大风最为频繁,但其持续时间最短,台风大风平均持续时间最长。By statistically analyzing the meteorological observation data of Ningbo Airport from 2012 to 2023, the basic characteristics of gale weather affecting Ningbo Airport were studied and summarized, with the aim of providing guidance for actual gale weather forecasting work. The results indicate that the average number of gale weather days is 5 per year at Ningbo Airport;The main activity period of gale weather throughout the year is from July to August, with no gale weather observed in June;Strong winds have obvious diurnal variation characteristics, mainly concentrated during the day;Cold front gales, thunderstorm gales, typhoon gales and low-pressure gales are the main types of gale weather at Ningbo Airport. Among them, thunderstorm gales are the most frequent but have the shortest duration, while typhoon gales have the longest average duration.
文摘利用常规观测资料、NCEP1°×1°的再分析资料和多普勒雷达数据对2016年12月21日发生在宁波机场上空的一次冬至雷暴天气过程进行了分析。结果表明,本次过程是由高空槽配合低层低涡及地面倒槽共同发展的结果;前期宁波机场中低层的高水汽通量值为强对流的发生创造了水汽条件;宁波机场上空大气不稳定参数表现为:ΔT_(850-500)达到28℃,K指数为36~37℃,θse值为336 K;强暖平流(900 h Pa:10×10^(-5)K/s,700 h Pa:10×10^(-5)K/s,300 h Pa:20×10^(-5)K/s)为本场雷暴发生提供充足能量;低层900 h Pa以上均为上升运动,有利于水汽和能量向高层输送,形成位势不稳定层结。
