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投稿时间:2023-11-04 修订日期:2024-07-17
投稿时间:2023-11-04 修订日期:2024-07-17
中文摘要: 针对体扫模式VCP21D在5°仰角以下垂直方向上采样较少及附近有探测空隙的问题,借鉴WSR-88D的体扫模式,建立VCP12D、VCP212D、VCP215D、VCP35D 4种新体扫模式,并利用营口双偏振天气雷达进行业务试验,结果表明:4种新体扫模式灵敏度和数据质量与现在业务模式VCP21D基本一致,地物抑制能力相当,满足业务运行指标,可以在业务中应用。强对流探测模式VCP12D和VCP212D较VCP11D增加了低层的垂直分辨率,可以获得距离雷达100 km之外更为详细的探测数据,同时扫描时间从5 min缩短到4 min,对于发展较快的强对流风暴探测效果更好。非强对流降水模式VCP215D较VCP21D增加6层探测仰角,可以获得更为连续的垂直探测产品,可以更为完整和精细地表现回波结构特征和风暴顶高度,探测时间与VCP21D相当,优越性明显。晴空模式VCP35D较VCP31D探测到的数据范围略小,但时空分辨率更高,探测优越性明显。新体扫模式提升了最大不模糊速度,VCP12D、VCP212D、VCP215D高层(10°以上)提升到33.36 m·s-1,VCP212D、VCP215D低层(0.5°~1.3°)提升到28.47 m·s-1,VCP35D整层提升到26.38 m·s-1。
中文关键词: 双偏振,体扫模式(VCP),灵敏度,垂直探测
Abstract:In order to address the issue of insufficient vertical sampling below 5° elevation angle and the presence of detection gaps in the volume coverage pattern 21D (VCP21D), four new scanning patterns, namely, VCP12D, VCP212D, VCP215D, and VCP35D, were developed based on WSR-88D. These new scanning patterns were tested using the Yingkou Dual-Polarization Weather Radar, and the results are as follow. The sensitivity and data quality of the four new scanning patterns are comparable to the current VCP21D. The capability to suppress ground clutter is also similar, meeting the operational performance requirements. Therefore, these new scanning patterns can be applied in operational settings. The severe convective detection patterns, VCP12D and VCP212D, provide increased vertical resolution in the lower levels compared to VCP11D. They can obtain more detailed detection data beyond 100 km from the radar. Additionally, their scanning time is reduced from 5 min to 4 min, resulting in improved detection performance for the rapidly developing severe convective storms. The non-severe precipitation mode, VCP215D, has 6 more elevation angles added compared to VCP21D. This allows for more continuous vertical detection products and enables a more complete and detailed representation of echo structure characteristics and storm top heights. The detection time of VCP215D is comparable to that of the VCP21D, demonstrating its superiority. The clear sky pattern, VCP35D, has a slightly smaller data coverage range compared to VCP31D, but it offers higher spatio-temporal resolution and exhibits superior detection capabilities. The new scanning modes have increased the maximum non-blur speed. The high-altitude (above 10°) speeds for VCP12D, VCP212D, and VCP215D have been raised to 33.36 m·s-1, the low-altitude (0.5°-1.3°) speeds for VCP212D and VCP215D have been raised to 28.47 m·s-1, while the entire layer speed for VCP35D has been increased to 26.38 m·s-1.
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基金项目: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(2023SYIAEKFMS08)、辽宁省自然科学基金项目(2021-YKLH-17)、中国气象局创新发展专项(CXFZ2022J003)、中国气象科学研究院基本科研业务费重点项目(2023Z019)、辽宁省气象局人才计划项目(RC202405)和营口市气象局科研课题(202302)共同资助
引用文本:
张晶,姚文,孙召平,崔福涛,原久淞,吴杨,孙永联,李洋,杨红强,2024.双偏振天气雷达新体扫模式试验评估分析[J].气象,50(10):1201-1215.
ZHANG Jing,YAO Wen,SUN Zhaoping,CUI Futao,YUAN Jiusong,WU Yang,SUN Yonglian,LI Yang,YANG Hongqiang,2024.Evaluation and Analysis of Experimental Testing of Dual-Polarization Weather Radar’s New Volume Coverage Pattern[J].Meteor Mon,50(10):1201-1215.
张晶,姚文,孙召平,崔福涛,原久淞,吴杨,孙永联,李洋,杨红强,2024.双偏振天气雷达新体扫模式试验评估分析[J].气象,50(10):1201-1215.
ZHANG Jing,YAO Wen,SUN Zhaoping,CUI Futao,YUAN Jiusong,WU Yang,SUN Yonglian,LI Yang,YANG Hongqiang,2024.Evaluation and Analysis of Experimental Testing of Dual-Polarization Weather Radar’s New Volume Coverage Pattern[J].Meteor Mon,50(10):1201-1215.