摘要
利用云南113个常规气象站1961—2006年雷暴日数资料，采用旋转经验正交展开方法将云南划分为6个气候区域，并在此基础上对雷暴日数进行时空变化分析．结果表明：云南省雷暴自1961年以来呈现显著减少的趋势，且在1980s发生过一次显著减少的突变．从地域分布上看，各个区域的雷暴均呈减少趋势，其中以南部和西南部减少最显著．雷暴初日、终日均有提早趋势，而间隔13数则有加长的趋势，但均不能达到统计学意义上的显著水平．
By using the method of rotated empirical orthogonal function （REOF） and according to thunder-storm days data of 113 routine meteorological stations,Yunnan Province is partitioned into six regions and its spa- tial - temporal variation is analyzed. The results showed that the thunderstorm days in Yunnan Province had a descending trend during 1961-2006, and thunderstorm days took place an abrupt occurred in 1980 s. For spatial - variation, all of various regions had descending trend, especially in Southern ＆ Southwestern Yunnan. Initial/ending dates of thunderstorm had ahead trends and the number of days between two dates had an increasingly trend, but don＇ t attain marked levels of statistics.
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2009年第2期159-164,共6页
Journal of Yunnan University(Natural Sciences Edition)
基金
云南省气象局多轨道业务研究专项"动力模式产品在云南短期气候预测的应用研究"
云南省气象局气候变化专项(QH200901)共同资助
关键词
云南省
雷暴
时空变化
Yunnan Province, thunderstorm days, spatial - temporal variation
