摘要
根据1961～2012年雷暴观测资料,分析了近52年乌拉特中旗地区雷暴的时空分布、年际和年代际变化特征。结果表明,乌拉特中旗平均年雷暴日数为23.8 d,初日平均出现在5月6日,终日平均出现在9月19日;雷暴日主要集中在5～9月,以6～8月最多;西北方出现雷暴的频率最多;近52年乌拉特中旗年雷暴日数表现为不显著的减少趋势,初日呈显著的推迟趋势,平均推迟幅度为6.3 d/10a;20世纪70年代以来乌拉特中旗年雷暴日数表现为逐年代减少趋势,80年代至今雷暴初日呈逐年代推迟趋势。
Based on thunderstorm observation data from 1961 to 2012, the temporal and spatial distribution, inter-annual and decadal varia- tion characteristics of the thunderstorm in Urat middle county area was analyzed. The results showed that the average year thunderstorm in Urat middle county was 23.8 days, the first day appeared in May 6 meanly, the last day appeared in September 19 meanly. The thunderstorm days mainly were concentrated from May to September, among them June July and August are the most. The frequency of thunderstorms most ap- peared in the north-west. The annual thunderstorm days shown as indistinctive decreasing trend in Urat middle county in recent 52 years, the first day shown as significant delay trend, it came later 6.3 d/10a. The year thunderstorm days shown as decreasing trend decade by decade in Urat middle county since 1970; The thunderstorm first day shown as delay trend decade by decade since 1980.
出处
《安徽农业科学》
CAS
2013年第4期1637-1638,共2页
Journal of Anhui Agricultural Sciences
关键词
乌拉特中旗
雷暴
气候特征
Urat middle county
Thunderstorm
Climatic characteristics
