摘要
利用辽宁省S波段双偏振天气雷达资料,对2019年6月7—9日辽宁地区一次东北冷涡强对流天气过程及双偏振雷达的偏振参量在降水粒子相态识别中的作用进行分析,并对模糊逻辑算法中的判别规则进行改进和分析。结果表明:双偏振雷达的偏振参量可以对水凝物的种类、空间分布、物理形态进行大致判断,但水凝物相态识别结果仍需细化。采用非均匀权重相加的判别规则能够有效地对两次天气过程中的降水粒子相态进行识别。不同的判别规则得到的水凝物分类结果在弱回波区虽存在一定差异,但在大部分观测区域的分类结果基本一致,符合天气演变规律,能够为气象预报预警提供鉴别参考。具有广泛时间、空间适配性的模糊逻辑算法,仍需大量实测案例数据的验证与仿真。
The evolution of northeast cold vortex weather in Liaoning region from June 7 to 9,2019 are analyzed by using S-band dual-polarization radar data,the role of the radar's polarization parameters in phase state identification of precipitation particles are also investigated,and the discriminating rules of fuzzy logic algorithm are improved and analyzed as well.It shows that,the polarization parameters of dual polarization radar can be used to roughly judge the species,spatial distribution and physical form of the hydrometeors,but the phase identification results of the hydrometeors still need to be detailed further.Using the discriminant rule of non-uniform weight addition,the phase state of precipitation particles in two weather processes can be effectively identified.Although the classification results of hydrometeors obtained by different discriminant rules are slightly different in weak echo area,the classification results are basically consistent with each other in most observation areas,which follows the law of weather evolution,and can thus provide identification reference for weather forecast and early warning.The fuzzy logic algorithms with wide temporal and spatial suitability still need to be verified and simulated by a large number of measured case data.
作者
王冠
郑石
侯畅
张晶
黄兴友
于淼
WANG Guan;ZHENG Shi;HOU Chang;ZHANG Jing;HUANG Xingyou;YU Miao(Institute of Atmospheric Environment,China Meteorological Administration,Shenyang 110166,China;Liaoning Meteorological Equipment Support Center,Shenyang 110166,China;Liaoning Branch Center of China Meteorological Administration Training Center,Shenyang 110166,China;Yingkou Meteorological Bureau,Yingkou 115000,China;Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters,Nanjing University of Information Science and Technology,Nanjing 210044,China;Anshan Meteorological Bureau,Anshan 114000,China)
出处
《沙漠与绿洲气象》
2023年第4期45-52,共8页
Desert and Oasis Meteorology
基金
国家自然科学基金(40775029)
中国气象局沈阳大气环境研究所和东北冷涡重点开放实验室联合开放基金项目(2020SYIAE03)
辽宁省气象局年度基金项目(202214)。
关键词
降水粒子相态识别
模糊逻辑算法
双偏振雷达
东北冷涡
hydrometeors classification
fuzzy logic algorithm
dual polarization radar
northeast cold vortex
作者简介
王冠(1987-),女,工程师,主要从事天气雷达资料处理及研究工作。E-mail:510042894@qq.com;通信作者:侯畅(1995-),女,助理工程师,主要从事天气雷达资料处理及研究工作。E-mail:2609760417@qq.com。
