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利用2008—2010年6—8月共9个月的地面观测资料、高空观测资料和探空资料,分析发生强对流天气的天气形势,进行相关性分析并使用消空法筛选有利于强对流天气发生的物理量因子和指数。分析和检验结果表明:在系统性天气过程影响下K指数、沙氏指数(SI)、700hPa假相当位温(θse(700))和地面24小时变温(△T24)对广汉机场12小时强对流天气潜势预报有较好的指导作用。
Using the surface observation data, the upper-air observation data and the sounding data from June to August in 2008-2010 for a total of 9 months, the weather situation of strong convective weather was analyzed, the correlation analysis was carried out, and the air-void method was used to screen the favorable weather for strong convective weather The physical quantities and indices that occur. The results of analysis and test indicate that the K-index, the Sandy Index (SI), the pseudo-relative bit-temperature at 700hPa (700seconds) and the ground temperature change of 24 hours (△ T24) Forecast of the weather potential has a good guiding role.