甘南高原雷暴的气候特征  

Climatic Characteristics of Thunderstorms over Gannan Plateau

作　　者：王建兵 

机构地区：[1]甘肃省甘南州气象局,甘肃合作747000

出　　处：《干旱气象》2007年第4期51-55,共5页Journal of Arid Meteorology

基　　金：甘肃省气象局"西北地区防雹消雹技术在甘南州冰雹;雷暴短时临近预报预警中的应用推广研究(2007-07)"课题资助

摘　　要：利用甘南州8个气象站自建站到2005年的雷暴资料,对雷暴的时空分布特征进行了分析,发现甘南州雷暴多发区位于西南部的玛曲、碌曲到东北部的合作之间;从年际变化看,大部分地方的年雷暴天数呈明显下降趋势,特别是1990年代中期后,这种下降趋势更明显,但各地雷暴初终间日数的变化并不明显;夏季雷暴天气出现最多,出现最多的月份是7月,雷暴次数约占全年雷暴次数的20.2%。春末夏初5月下旬到6月上旬、6月下旬和7月中下旬、8月下旬是各月的雷暴高发时段;甘南雷暴1天中的盛发期在12～20时,14～15时是雷暴出现的峰值时段。By using the data of eight weather stations＇ records of thunderstorms over Gannan plateau from the beginning of each station＇s establishment to 2005,the temporal and spatial distribution features of thunderstorms were analyzed.The results show that thunderstorm occurred more frequently in Maqu,Luqu and Hezuo counties;The annual thunderstorm days presented descending trend and the trend is more obvious after the middle of the 1990s,but the variation of the duration days between the beginning and the ending time of thunderstorm occurring in Gannan plateau is not very distinct;Summer is thunderstorm season and July is the month in which thundstorms occur most frequently,and the percentage of thundstorm times in July is 20.2%.The late spring and early summer,the third ten-day of June,the second and third ten-day of July,the third ten-day of August are the peak periods for thunderstorms occurring in Gannan;The daily thunderstorm occurring peak time is 14：00-15：00,and the percentage of thundstorm times is 30.3% in this period.

关 键 词：甘南高原 雷暴 特征 

分 类 号：P468.028[天文地球—大气科学及气象学]