沙漠与绿洲气象2024，Vol.18Issue(4)：76-82,7.DOI:10.12057/j.issn.1002-0799.2024.04.011
X波段双偏振雷达冰雹偏振参量特征分析
Analysis of Polarization Parameters of Hail in X-band Dual Polarization Radar
摘要
Abstract
Using the MaXPol dual polarization radar observation of 26 hail cloud cells and hail data for inversion,the characteristics of polarization parameters and changes in strong center echo top height before hail were statistically analyzed,and a case study was conducted on the most severe hail disaster process.The results indicated that:(1)The hail index of the radar was Zh(reflectivity factor)>50 dBZ,ρHV(correlation coefficient)≤0.8,-2 dB<Zdr(differential reflectance)<1dB,and the top height of the strong center echo should at least exceed the-10℃layer.The duration before hail was 6-12 minutes,and the average duration of large hail was 1.6 times.(2)Before the hailstorm,the trend of the top height of the strong center echo in large and small hail was consistent,but the growth rate of the top height of the strong center echo in large hail was significantly greater than that in small hail within 4-5 minutes.(3)Only the strong central echo top of the large hail could break through the-30℃layer.(4)The case study found that the strong center did not correspond to the hail area one by one.During the generation and development stage,the hail area was concentrated in the correlation coefficient ring behind the strong center,hanging in the 0--20℃layer.In the mature stage,the spread of hail areas included a strong center,and the suspended hail area began to collapse to the ground,leading to the onset of hail.关键词
双偏振雷达/冰雹识别/偏振特征Key words
dual polarization radar/hail identification/polarization characteristics分类
天文与地球科学引用本文复制引用
蔡军,张艳,陈林,柯莉萍,姚振东..X波段双偏振雷达冰雹偏振参量特征分析[J].沙漠与绿洲气象,2024,18(4):76-82,7.基金项目
中国气象局大气探测重点开放实验室联合基金开放课题(U2021Z02) （U2021Z02）
毕节市气象局登记制项目(BJKD[2023]12-01) （BJKD[2023]12-01）
毕科合[2023]8号 （）
贵州省科技计划项目(黔科合支撑[2023]一般194) （黔科合支撑[2023]一般194）
