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气象:2020,46(1):63-72
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不同强度强对流云系S波段双偏振雷达观测分析
林文,张深寿,罗昌荣,江慧远,谢祖欣,李丹,陈彬彬
(福建省气象科学研究所,福州 350001; 中国气象局云雾物理环境重点开放实验室,北京 100081; 海峡气象开放实验室,厦门 361012; 福建省龙岩市气象局,龙岩 364000; 南京信息工程大学,南京 210044)
Observational Analysis of Different Intensity Sever Convective Clouds by S-Band Dual-Polarization Radar
LIN Wen,ZHANG Shenshou,LUO Changrong,JIANG Huiyuan,XIE Zuxin,LI Dan,CHEN Binbin
(Fujian Meteorological Science Institute, Fuzhou 350001; Key Laboratory for Cloud Physics, CMA, Beijing 100081; Laboratory of Straits Meteorology, Xiamen 361012; Longyan Meteorological Office of Fujian Province, Longyan 364000; Nanjing University of Information Science and Technology, Nanjing 210044)
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投稿时间:2018-09-27    修订日期:2019-12-07
中文摘要: 通过厦门S波段双偏振天气雷达观测到的超级单体、普通降雹单体和非降雹单体三种不同强度的强对流个例,分析其在发展、成熟阶段出现的双偏振参数特征差异,包括差分反射率(ZDR)、差分相位差(KDP)、相关系数(CC)等,发现:ZDR柱和KDP柱是不同强度强对流云体内部普遍存在的动力特征;超级单体和普通降雹单体在近地层还有表征入流区的CC谷特征;此外在超级单体成熟阶段低层还出现了ZDR弧、KDP印,以及高层对应着大冰雹的CC低值区等特征。ZDR柱不仅可用于识别过冷水区还具有预测强对流云体未来发展趋势的能力,利用CC谷可识别强单体的入流区,KDP柱、KDP印及其空缺可识别强降水、大冰雹区等,因此双偏振参量特征识别在强对流短时临近预警预报、人工防雹方面都具有很强应用潜力。
Abstract:Three cases of severe convection with different intensities, including supercell, common hail storm and non-hail storm, observed by Xiamen S-band dual-polarization radar are presented in this paper. The characteristic differences of dual-polarization radar in these cases, containing differential reflectivity (ZDR), specific differential phase (KDP) and co-polar correlation coefficient (CC) during storm developing from growing stage to mature stage were analyzed. The ZDR and KDP columns are common features existing in these different intensities of storms. The supercell and common hail storm also have CC hole characteri-stics, featuring the inflow area near ground. In addition, ZDR arc and KDP foot also appear at low level and CC low value region with big hails at high level in mature stage of supercell. The variation of ZDR column can be used to identify super-cooled water area and forecast the developing trend of severe convective clouds. The CC hole can be used to identify the inflow area of convective cell. Then KDP column, KDP foot or its vacancy can be used to identify the areas of heavy rain or big hails. Therefore, the feature identification of dual-polarization radar have great potentials in short-term early warning of severe convection and hail suppression.
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基金项目:中国气象局云雾物理环境重点实验室开放科研课题(2017Z01606)、福建省科技厅引导性项目(2018Y0003)和福建省气象局开放式气象科学研究基金项目(2018K09)共同资助
引用文本:
林文,张深寿,罗昌荣,江慧远,谢祖欣,李丹,陈彬彬,2020.不同强度强对流云系S波段双偏振雷达观测分析[J].气象,46(1):63-72.
LIN Wen,ZHANG Shenshou,LUO Changrong,JIANG Huiyuan,XIE Zuxin,LI Dan,CHEN Binbin,2020.Observational Analysis of Different Intensity Sever Convective Clouds by S-Band Dual-Polarization Radar[J].Meteor Mon,46(1):63-72.