1994—2013年锡林郭勒盟雷暴日特征分析

Analysis on Thunderstorm Characteristics in Xilin Gol League from 1994-2013

文章利用1994—2013年锡林郭勒盟雷暴观测资料,对雷暴的时间分布特点及变化规律进行了分析。结果表明,锡林郭勒盟雷暴毎10a降低0.42d;月、季雷暴日数分布为单峰曲线,有较强的季节性特点,集中出现在6—8月;全盟雷暴初日明显的推迟,雷暴终日提前结束;雷暴空间分布很不均匀,具体表现为自西北向东南依次递增,南部高、中部和东部较少、而东部又比西部多;二连浩特市雷暴日数最少,年平均雷暴日数17.90d,而多伦县和正蓝旗雷暴日数较多,分别为36.45d和31.55d。这些特征对锡林郭勒盟雷电灾害的防护提供参考。

Using the thunderstorm observation data of Xilin Gol League from 1994 to 2013 years, the article analyzed the time dis- tribution characteristics and change rules of thunderstorm. The results showed that the thunderstorm days reduced 0.42 days per ten years in Xilin Gol League, the distribution of monthly and seasonal thunderstoIm days were unirnodal curve, had strong seasonal fea- ture, happened in June, July and August. The thunderstorm first day was postponed obviously, the end days was early termination. The spatial distribution of thunderstorm was very nonuniform. The specific feature was progressive increase from northwest to south- east, the south was higher, the middle and east was less, the eastern part was more than west. The annual mean thunderstorm days was 17.9 days and was least, the thunderstorm days of Duolun and Zhenglan Banner were more, was 36.45d and 31.55d.these char- acteristic provided some reference for lightning disaster defence.