| 山东中西部一次长生命史超级单体雷达回波特征和触发机制分析 |
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| 引用本文： | 朱义青,胡顺起.山东中西部一次长生命史超级单体雷达回波特征和触发机制分析[J].新疆气象,2021,15(1):54-61. |
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| 作者姓名： | 朱义青 胡顺起 |
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| 作者单位： | 临沂市气象局,喀什地区气象局 |
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| 摘 要： | 利用常规观测资料、多普勒雷达产品、NCEP/NCAR再分析资料和加密自动站等资料分析了2016年6月14日山东中西部地区一次长生命史超级单体的环境条件和雷达回波结构演变。结果表明,强对流发生在华北冷涡天气背景下,中层有中空急流配合的冷槽叠加在低层低空急流配合的暖脊上,中低层之间水汽和热量的平流差异不断增大。地面露点锋生和中尺度辐合线触发的对流云团在深厚的垂直风切变和强的垂直不稳定层结作用下逐渐发展成超级单体风暴。超级单体低层反射率因子呈现明显"V"型缺口,反射率因子垂直剖面呈现典型的有界弱回波区,回波悬垂和回波墙,相应的中高层径向速度呈现出一个强中气旋,旋转速度达29 m/s,中气旋的发展和维持使得超级单体发展和维持。6月,当最大反射率因子值达到60 dBZ,出现中等强度以上中气旋且VIL值和VIL密度分别达59 kg/m2和4.7 g/m3以上时,在强对流预报业务中需要注意大冰雹的出现。冰雹发生在风暴单体强中心所在高度和回波顶高下降期间。
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| 收稿时间： | 2019/11/11 0:00:00 |
| 修稿时间： | 2020/1/13 0:00:00 |
Analysis of echo characteristics and trigger mechanism of a long life history Super monomer radar in Central and Western Shandong province |
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| Zhuyiqing and.Analysis of echo characteristics and trigger mechanism of a long life history Super monomer radar in Central and Western Shandong province[J].Bimonthly of Xinjiang Meteorology,2021,15(1):54-61. |
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| Authors: | Zhuyiqing and |
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| Institution: | Linyi Meteorological Office of Shandong Province, |
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| Abstract: | Using conventional observation data, FY-2G data,Doppler weather radar data, NCEP/NCAR reanalysis data and encrypted automatic stations, the environment of a long life supercell occurred in the central and western parts of Shandong Province on 14 June 2016 was analyzed. Conditions and radar echo structure evolution. The results show that the strong convection occurs in the cold vortex weather in North China. The cold trough with hollow jets in the middle layer is superimposed on the warm ridges of the low-level jets. The difference of water vapor and heat between the middle and lower layers is increasing. The convective clouds triggered by ground dew point and mesoscale convergence lines gradually develop into supercell storms under the effects of deep vertical wind shear and strong vertical instability.The low-level reflectivity factor of the super-cell exhibits a distinct "V"-shaped gap, and the vertical section of the reflectivity factor exhibits a typical bounded weak echo region, the echo overhang and the echo wall, and the corresponding mid-high-rise radial velocity presents a strong middle The cyclone has a rotation speed of 29 m?s-1, and the development and maintenance of the medium cyclone makes the super monomer develop and maintain. In June, when the maximum reflectivity factor reached 60 dBz, medium-range cyclone and VIL and VIL density reached 59 kg?m-2 and 4.7 g?m-3 respectively, the strong convection forecasting service Need to pay attention to the appearance of big hail. At the appropriate wet bulb temperature, Each time the maximum height factor of the maximum height of the jump and rapid decline corresponds to a large hail on the ground. |
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| Keywords: | Long life history supercell Doppler weather radar data VIL density |
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