摘要
利用1971—2010年逐日降雹资料、雷达观测和卫星云图资料,通过气候诊断分析了辽宁西部冰雹发生频率,出现时间以及发生的天气特点。结果表明,辽西地区冰雹发生在3—11月,6—8月占全年的80%;日变化12:00—20:00占70%。主要冰雹路径有5条,均由西北进入辽西境内。高空冷涡或冷槽是发生冰雹的主要天气系统;预报冰雹天气时,锋面、高空冷涡、高空冷平流、低空暖平流出现时增加雷达观测次数。研究结果可为辽西冰雹预测预报、防灾减灾提供依据。
Using the daily hail data, radar data and satellite imagery in 1971-2010, the hail frequency, time and the weather features of Western Liaoning were ana- lyzed , by climate diagnostics. The re- suits showed that the hail occurred in Western Liaoning between March and November, and the hail occurred in June to August accounted for 80%. About 70% occurred in 12：00-20：00 in daily. There were five main hail paths, which entered the territory of Westem Liaoning from Northwest. High-altitude cold vor- tex or cold trough was the major weather systems of hail. The number of radar ob- servation should be increased for fore- casting hail when the fronts, high-alti- tude cold vortex, high-altitude cold ad- vection, low-level warm advection oc- curred. The results could provide the ba- sis for hail forecasting, disaster preven- tion and mitigation of Western Liaoning.
出处
《农业灾害研究》
2013年第6期32-34,共3页
Journal of Agricultural Catastrophology
关键词
辽宁西部
冰雹
时空分布
预测预报
Western Liaoning
Hail
Spatial and temporal distribution
Predic-tion and forecast
