摘要
利用云雷达以及微雨雷达等观测资料,对六盘山区一次降水过程的增雨条件及作业效果进行分析。结果表明,此次降水属于层积混合降水;六盘山东坡最大雷达反射率因子最大,其次是西坡,山顶最弱;东坡水凝物粒子下落末速度最大,其次是山顶,西坡最小;降水前云液态含水量以及大气水汽含量出现显著跃增,六盘山东西两侧气流均为上升运动,降水结束后水平风速加强,云系生消在降水前、中、后期出现多层、单层、多层的结构特征。对此次降水过程所开展的地面火箭增雨评估后发现,该区域历史回归分析得到的绝对增雨量为4.2mm,相对增雨率为75.3%。
Using the data obtained by cloud radar and light rain radar et al., the precipitation enhancement conditions and the operation effects of cloud seeding of a precipitation process in Liupan Mountains from July 26to 28, 2021 were analyzed. The results show that this precipitation belongs to stratified mixed precipitation. The maximum radar reflectivity factor is the largest on the eastern slope of Liupan, followed by the western slope, and the peak of the mountain is the weakest. The maximum value of the final falling velocity of hydrometeor particles on the east slope is the largest, followed by the top of the mountain, and the western slope is the smallest. Before the precipitation, the cloud liquid water content and the atmospheric water vapor content increased significantly.There were updrafts on the east and west sides of the mountain. After the precipitation, the horizontal wind speed strengthened. Besides, the formation and disappearance of cloud system appeared multi-layer, single-layer and multi-layered structural features before, during and after precipitation, respectively. After evaluating the ground rocket rainfall increase carried out by this rainfall process, it was found that the absolute rainfall increase obtained by the regional historical regression analysis was 4.2mm, and the relative increase rate of rainfall was75.3%.
作者
常倬林
党张利
贾乐
曹宁
邓佩云
周楠
Chang Zhuolin;Dang Zhangli;Jia Le;Cao Ning;Deng Peiyun;Zhou Nan(Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculturein in Arid Regions,Yinchuan 750002,China;Key Laboratory for Cloud Physics of China Meteorological Administration,Chinese Academy of Meteorological Sciences,Beijing 100081,China)
出处
《气象研究与应用》
2022年第3期26-30,共5页
Journal of Meteorological Research and Application
基金
第二次青藏高原综合科学考察研究项目(2019QZKK0104)
宁夏回族自治区重点研发计划项目(2022BEG02010)
宁夏青年拔尖人才培养基金项目(RQ0023)
中国气象局创新发展专项(CXFZ2021J043)。
关键词
六盘山
微波辐射计
云雷达
微雨雷达
人工增雨
Liupan Mountain
microwave radiometer
cloud radar
micro rain radar
cloud seeding
