| 一次雹灾天气过程的三体散射研究 |
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| 引用本文： | 许晶,孔文甲,周志花,郑玉峰,张连霞,赵海波,张璐,霍志丽,訾倩倩,韩仲强,王志春.一次雹灾天气过程的三体散射研究[J].新疆气象,2022,16(4):57-63. |
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| 作者姓名： | 许晶 孔文甲 周志花 郑玉峰 张连霞 赵海波 张璐 霍志丽 訾倩倩 韩仲强 王志春 |
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| 摘 要： | 利用自动气象站资料、CINRAD/CD多普勒雷达资料、实地冰雹调查资料及NCEP/NCAR再分析资料，分析2020年一次呼和浩特市托克托县地区强冰雹事件发生时出现的三体散射与风暴云团三维结构、发展特征，结果表明：（1）C波段雷达较S波段雷达容易出现三体散射。（2）三体散射现象和55 dBZ或60 dBZ等强回波密切相关，尤其是60 dBZ强回波出现时，三体散射现象也随之出现。（3）从三体散射与冰雹云体积变化情况来看，60 dBZ冰雹云体积即使在50 km3以下也会出现三体散射。（4）在本个例中发现多重三体散射，其特征是在雷达径向上三体散射长度较长，为强回波距地高度的3~5倍，随着多重散射次数的增加，散射越来越弱，故多重三体散射强度沿着强回波径向上逐渐减弱。（5）三体散射现象首次出现后，开始出现冰雹,下沉气流使冰雹云回波顶高迅速下落，其中60 dBZ回波顶高下落最为明显，垂直厚度减少最为严重。大冰雹降落后60 dBZ回波底高迅速抬升,体积急剧减小,之后风暴云团回波顶高、体积进入平稳阶段。
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| 关 键 词： | 冰雹 多重三体散射 体积变化 |
| 收稿时间： | 2021/10/26 0:00:00 |
| 修稿时间： | 2021/12/21 0:00:00 |
The Radar Three Body Scattering Studies on A Hail DamageWeather Process |
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| XU Jing,KONG Wenji,ZHOU Zhihu,ZHENG Yufeng,ZHANG Lianxi,ZHAO Haibo,ZHANG Lu,HUO Zhili,ZI Qianqian,HAN Zhong-qiang and WANG Zhi-chun.The Radar Three Body Scattering Studies on A Hail DamageWeather Process[J].Bimonthly of Xinjiang Meteorology,2022,16(4):57-63. |
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| Authors: | XU Jing KONG Wenji ZHOU Zhihu ZHENG Yufeng ZHANG Lianxi ZHAO Haibo ZHANG Lu HUO Zhili ZI Qianqian HAN Zhong-qiang and WANG Zhi-chun |
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| Institution: | Ordos Meteorological Bureau,Ordos,Inner Mongolia Autonomous Region,Inner Mongolia Autonomous Region Meteorological Observatory,Hohhot,Inner Mongolia Autonomous Region,Inner Mongolia Autonomous Region Meteorological Observatory,Hohhot,Inner Mongolia Autonomous Region,Ordos Meteorological Bureau,Ordos,Inner Mongolia Autonomous Region,Ordos Meteorological Bureau,Ordos,Inner Mongolia Autonomous Region,Ordos Meteorological Bureau,Ordos,Inner Mongolia Autonomous Region,Inner Mongolia Autonomous Region Meteorological Observatory,Hohhot,Inner Mongolia Autonomous Region,Inner Mongolia Autonomous Region Meteorological Observatory,Hohhot,Inner Mongolia Autonomous Region,Ordos Meteorological Bureau,Ordos,Inner Mongolia Autonomous Region,Inner Mongolia Autonomous Region Meteorological Information Center,Hohhot,Inner Mongolia Autonomous Region,Ordos Meteorological Bureau,Ordos,Inner Mongolia Autonomous Region;Inner Mongolia Autonomous Region Meteorological Observatory,Hohhot,Inner Mongolia Autonomous Region;Inner Mongolia Autonomous Region Meteorological Information Center,Hohhot,Inner Mongolia Autonomous Region |
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| Abstract: | Utilizing TheNCEP/NCAR reanalysis project, surface observations collected at various automatic meteorological stations, radar observations from CINRAD/CD Doppler weather radars and hail information obtained from field surveys are analyzed to investigate the three-dimensional structure and development characteristics of storm cell with three-body scattering, and the formation mechanism of three-body scattering, when a rare and severe hailstorm occurred in 2020 in Tuoketuo county, Hohhot. The results show that: (1) the three-body scattering is easy to occur at c-band weather radar; (2) the three-body scattering phenomenon in this weather process is directly bound up with strong echoes such as 50 dBz or 60 dBz, especially the three-body scattering phenomenon also occurred when the 60dBz strong radar echoes can be found in Doppler weather radars; (3) From the perspective of three-body scattering and volume of hail- cloud changes, volume of hailstorm clouds in 60 dBz is minimum for three-body scattering to occur, which can be less than 50 km3; (4) multiple scattering occurred in Tuoketuo county, which is characterized by in the radial direction of the radar, and its intensity weakens gradually; (5) this exception shows that hail has occurred in the corresponding actual situation after the first three-body scattering phenomenon appeared, the height of echo top dropped during subsidence. among all radar reflectivity factor, hail-cloud is the most obvious, and the vertical thickness reduction is maximum in the 60 dBz. the height of hail-cloud bottom rises rapidly, the volume decreases quickly, and the storm cell has a stable stage after the heavy hail falls. |
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| Keywords: | hail multiple scattering volume variation |
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