摘要
利用地面自动站观测、MICAPS预报产品以及NCEP/NCAR 1°×1°再分析资料,对2010年3月12日发生在新疆和田地区的一次区域性黑风天气过程进行能量和不稳定条件诊断分析。结果表明:(1)纬向转经向环流的调整和中、低空不断加强的西北锋区结合地面强冷锋的配置结构为黑风天气的暴发提供了强大的动力背景;(2)黑风天气暴发在高能且极不稳定的大气环境条件下;(3)代表能量和不稳定条件的螺旋度、有效位能、对流抑制指数、粗理查森数和假相当位温在时间、落区、强度上与黑风天气的演变极为吻合,具有很好的预报指示意义。
Using automated ground observational data, MICAPS forecast products, and NCEP / NCAR 1°× 1° re-analysis data, the energy and unstable weather conditions of a regional black storm on March 12,2010 were analyzed. The results showed that： （1） The adjustment of the transformation from the zonal to the meridional circulation and the combination of the continuously reinforced northwestern frontal zone and the strong surface cold front provided the dynamical background for the outbreaking of black stormy weather. （2） Black stormy weather brok out in high energy and highly unstable atmospheric conditions. （3） Representatives for energy and the unstable conditions, including the helicity, available potential energy, convective inhibition index, crude Richardson number and the pseudo-equivalent temperature were consistent with the black stormy weather in terms of the time, the drop zone, the intensity evolution, and could provide good implications for the forecast .
出处
《沙漠与绿洲气象》
2012年第1期10-15,共6页
Desert and Oasis Meteorology
基金
公益性行业(气象)科研专项(GYHY201006012):沙漠及周边地区灾害性天气监测预报警报技术资助
关键词
区域性黑风
能量
不稳定条件
regional black storm, energy, unstable conditions
