基于天水多普勒天气雷达资料， 通过“最大值法”筛选出对流回波样本， 利用TITAN（雷暴识别跟踪分析和临近预报）算法对对流风暴属性特征追踪统计， 分析了甘肃东南部暖季（6 -8月）对流活动的雷达气候学特征。结果表明： （1）对流活动频次多集中在高海拔山区附近， 大值中心位于六盘山西侧山脉的迎风坡或西秦岭山脉起伏较大的区域， 其中8月为对流活动高峰期。（2）对流风暴以西北向东南方向传播为主， 不同月份传播特征存在一定差异； 6月传播速度最快、 8月最慢。（3）对流活动发生频率日变化特征呈单峰分布， 主峰区位于16:00 -17:00（北京时）； 不同地形对流发生、 发展具有不同的日变化特征， 午后高海拔区域是热力对流发生的高频区， 夜间对流活动在山区、 河谷、 盆地、 平原等地形均有发生。（4）不同月份对流风暴的日变化存在明显差异， 6月午后太阳加热、 地形强迫对对流风暴的影响最为显著， 而7、 8月夜发对流对高原边坡复杂地形响应更高。午后组织性较好的风暴传播方向与山脉走向及坡向关系密切， 夜间时段与500 hPa盛行风关系密切。（5）超过90%的对流风暴持续时间在36 min以内， 仅有1%的风暴持续时间大于1 h。

The radar climatology characteristics of convection in southeastern Gansu Province during the warm season （June to August）were investigated using Tianshui Doppler radar data that filtered by “Maximum Method” and tracking statistics by “TITAN”（Thunderstorm identification Tracking Analysis and Nowcasting） algorithm.The frequency of convective activity showed large value in high altitude mountains with the Great value center located in windward slope of Western Liupanshan Mountain and undulating region of western Qinling Mountains， and the peak time in August.The convective storm mainly propagated from northwest to southeast， meanwhile the propagation characteristics presented a difference in different months and it spreads fastest in June and slowest in August.The diurnal variation of convective activity showed a unimodal distribution of frequency with peak region at 16:00 -17:00 （Beijing Time）.It's also showed in the occurrence and development of convection in different terrain occurrence and development in different terrain conditions with the high frequency of thermal convection mainly at high altitude area in the afternoon and presentation in the mountain， river valley， basin and plain respectively at night.The diurnal variation of convective storms in different months was obviously different.The influence of solar heating and topographic forcing on convective storms in the afternoon of June was the most significant， while the response of convective storms in the night of July and August was higher to the complex topography of the plateau slope.The propagation direction of the well-organized storm in the afternoon was closely related to the extension and slope direction of the mountain， and was closely related to the prevailing winds at 500 hPa at night.More than 90% convective storms lasted less than 36 minutes， and only 1% lasted longer than 1 hour.