【作者】 黄小玉； 陈媛； 唐瑶；

【Author】 Chen Yuan1 Huang Xiaoyu2 Tang Yao3 He Zhengyang2 Liu Jianke2 (1. Hunan Meteorological bureau ,Changsha,410007; 2.Hunan Meteorological Observatory; 410007 3.Yongzhou Meteorological Bureau, Hunan Province;425000)

【机构】 湖南省气象局； 永州市气象局；

【摘要】 前期天气持续回暖,积累大量不稳定能量,垂直风切变、动力、热力及水汽条件都有利于强对流天气的产生。分析这次过程地面、高空的温度、湿度、动能的扰动量,当过程影响前及影响期间,具有正温度扰动,过程影响后,具有负温度扰动,地面温度扰动明显大于高空各层的温度扰动,说明地面的热力作用大于高空的热力作用;扰动湿度场中,强对流天气发生区域各层的湿度小于周围环境的湿度扰动,这可能是出现雷雨大风的原因之一,各层的湿度扰动都比较大,因此对流很旺盛;扰动动能场中,过程发生区域的扰动能量明显大于过程发生前、后的扰动能量,各层中,以850hPa的扰动能量最大、地面次之。更多还原

【Abstract】 Due to the constantly warming in past days, a great deal of unstable energy was accumulated and vertical wind shear,dynamic condition,thermodynamic condition and vapour condition were all in favor of the forming of severe convective weather. The turbulence of temperature、humidity and kinetic energy in ground and in upper air were analysed and results showed that there was positive temperature turbulence before and in the period of severe convective weather while conversely negative turbulence after. At the same time,the temperature turbulence in ground was obviously bigger than that in every level of upper air which showed that the thermodynamic effect in ground was larger than that in upper air;The humidity turbulence in the occurrence area of severe convective weather was smaller than that around the area which was likely one of the reason of taking place thunderstorm and gale. The humidity turbulence of every level were relatively great and convection bloomed consequently;The kinetic energy turbulence in the occurrence area was distinctly bigger than that before and afer. Of all the level,the kinetic energy turbulence in 850 hpa was the biggest and that in groung took the second place.更多还原