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利用榆林市榆阳机场2008年—2011年的雷暴观测资料,通过数理统计方法,对榆阳机场雷暴天气的特征及其对飞行的影响进行了分析。榆阳机场年平均有17个雷暴日,一般出现在每年的4月—10月份,有明显的日变化特征;生成雷暴的主要天气系统是500 hPa有高空冷槽,700,850 hPa有切变线和辐合线;雷暴在卫星云图和雷达回波上具有显著的特征,云图云顶TBB-10℃~-30℃,雷达回波强度35~65 dbz以上。这些分析及数据对预报榆林市榆阳机场的雷暴具有指导意义。
The characteristics of the thunderstorm weather in Yuyang Airport and its impact on flight were analyzed by means of mathematical statistics using the data of thunderstorm observed in Yulin Airport of Yulin from 2008 to 2011. There are 17 thunderstorm days per year on average in Yuyang Airport, with obvious diurnal variation characteristics in April and October of each year. The main weather systems generating thunderstorms are high-altitude cold trough at 500 hPa and shear lines at 700 and 850 hPa respectively Convergence line; Thunderstorm has obvious characteristics in satellite and radar echoes. Cloud top TBB-10 ℃ ~ -30 ℃, radar echo intensity above 35 ~ 65 dbz. These analyzes and data are of guiding significance in forecasting thunderstorms at Yulong Airport in Yulin City.