【摘要】 通过对2006年张掖地区强对流天气的多普勒雷达资料分析,总结了本地强对流天气的雷达带状、块状强度回波特征;分析了强对流天气的中尺度系统中低空急流、暖平流、冷平流、逆风区、垂直风切变的雷达回波特征,将回波进行客观定量化,并引进了稳定度指标,得出具有可操作性的短时预报简明判据。更多还原

【Abstract】 By analyzing the doppler radar data of the strong convective weather processes occurred in Zhangye city in 2006,the intensity characteristics of belt-shaped and block echoes are summarized.Radar echo characteristics of mesoscale system of strong convective weather processes,including low-jet,warm advection,cold advection,contrary wind area and vertical wind shear,are analyzed.The echo features are quantified objectively,and the stability index is introduced.The concise criterion for feasibility short-time forecast is obtained.更多还原