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Position: Home > Articles > Spatial and Temporal Distribution of Thunderstorm in Tibet Journal of Anhui Agricultural Sciences 2015 (23) 173-176+240

西藏自治区雷暴时空分布特征

作  者:
罗骕翾;许永彬
单  位:
西藏自治区防雷中心;南京信息工程大学大气物理学院
关键词:
雷暴;时空分布;气候异常;突变检验
摘  要:
利用西藏地区38个气象台站的年、月、日、时等各个时段的雷暴资料,分析了西藏各个地区雷暴的空间分布与时间分布特征、雷暴日和西藏气候的关系,以及年雷暴日的气候突变和异常年等气候特征。结果表明,沿江一线的大部分地区和那曲地区是青藏高原雷暴最多的地区;西藏地区雷暴具有出现次数频繁、生命史短的特点,有60%以上的雷暴持续时间在30 min以内,全区雷暴日内主要出现在13:00~20:00,占总数的98%;拉萨和那曲、林芝和聂拉木的月雷暴日分布曲线分别十分类似;历年雷暴日数变化趋势除沿江一线和林芝地区以外,其他地区的年雷暴日表现出不同程度的减少趋势,其中那曲地区减少趋势最为明显,为2.9 d/10a;那曲地区和昌都地区分别在1990~2013、1985~2013年呈现年雷暴日显著偏少趋势;全区年雷暴日异常偏多年出现在20世纪80年代前,而异常偏少年出现在80年代后,异常年平均为26年左右出现一次。
译  名:
Spatial and Temporal Distribution of Thunderstorm in Tibet
作  者:
LUO Su-xuan;XU Yong-bin;Tibet Lightning Protection Center;Institute of Atmospheric Physics,Nanjing University of Information Science & Technology;
关键词:
Thunderstorm;;Spatial and temporal distribution;;Climatic anomaly;;Abrupt change test
摘  要:
By using the thunderstorm data of hours,days,months and years provided by 38 regional meteorological observatories in Tibet,spatial and temporal distribution features of thunderstorm in the regions of Tibet,the relationship between thunderstorm days and Tibetan climate,and climate features of climate abrupt change in annual thunderstorm days and abnormal years are analyzed. Result shows that most regions along the river and Nagqu prefecture are the thunderstorm prone areas on Tibetan Plateau. The thunderstorm in Tibetan area has the features of frequent and short life cycle. 60% thunderstorms last for less than half an hour. In thunderstorm days,the thunderstorm usually occurs between 13: 00 and 20: 00,which occupies 98% of the cases in these regions. The monthly thunderstorm days distribution curves of Lhasa and Nagqu,Nyingchi and Nyalam are respectively similar. According to the thunderstorm day variation tendency,except for the riverside areas and Nyingchi region,the annual thunderstorm days of other areas trend to reduce in different degree. The trend of reduction is most obvious in Nagqu region,being 2. 9 d /10 a. The annual thunderstorm days of Nagqu and Chamdo show obvious decreasing tendency during 1990- 2013 and 1985- 2013. Annual thunderstorm days becoming abnormally more occurred before 1980 s,and becoming abnormally less after 1980 s.The abnormal year appears in almost every 26 years.

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