| 摘要: |
| 为进一步提升黔东南三穗CINRAD-CD雷达及榕江双偏振雷达产品在山区强降雨过程中的应用能力，提升短临预报预警服务水平，对2部雷达在2022年7月18日大暴雨过程中观测和定量降水估测的差异进行对比分析。结果表明：榕江雷达总体探测能力强于三穗雷达，在黔东南州西部地区，由于雷公山地形阻挡作用，榕江雷达对低层探测能力减弱，在黔东南州中部及以东地区榕江雷达探测能力明显强于三穗雷达；2部雷达探测得到的组合反射率因子峰值与地面分钟降雨量峰值对应关系较好，当降雨减弱时，三穗雷达衰减更明显；三穗单偏振雷达对降水的起止时段及累积降水量的估测能力明显不足，而榕江双偏振雷达QPE产品对降水起止时间及降雨定量估测结果基本接近实况，在业务应用中具有较高的参考价值。 |
| 关键词: 黔东南；C波段；双偏振雷达；定量降水估测 |
| DOI： |
| 投稿时间：2023-05-24 |
| 基金项目:贵州省山地气候与资源重点实验室省市联合基金项目（sslj〔2022〕06）:贵州雷暴大风潜势预报研究；中国气象局预报员专项(CMAYBY〔2019〕105):贵州东南部致灾暴雨短临预报技术总结分析 |
|
| Comparative Analysis of Rongjiang Dual Polarization Radar and Sansui Radar in a Heavy Rainstorm Process in Qiandongnan |
| DONG Wentao,MAO Qian,LI Shuying,CAI Yao,ZHANG Chao |
| (Qiandongnan Miao and Dong Prefecture Meteorological Bureau of Guizhou Province, Kaili 556000 , China;Cengong Meteorological Bureau of Guizhou Province, Cengong 557800 , China;Rongjiang Meteorological Bureau of Guizhou Province, Rongjiang 557200 , China) |
| Abstract: |
| In order to further enhance the products application capability of Qiandongnan Sansui CINRAD-CD Radar and Rongjiang dual polarization Radar during heavy rainfall processes in mountainous areas, and improve the service level of short-term forecasting and early warning, the differences between the observation and quantitative precipitation estimation of the two radars in the heavy rainstorm process on July 18, 2022 were compared and analyzed. The results show that the overall detection capability of Rongjiang radar is stronger than that of Sansui radar. In the western part of Qiandongnan, the detection capability of Rongjiang radar to lower levels is weakened due to the topographic blocking effect of Leigong Mountain, and the detection capability of Rongjiang radar is significantly stronger than that of Sansui radar in the central and eastern parts of Qiandongnan. The CR peak value detected by the two radars has a good correspondence with the ground minute rainfall peak value, Sansui radar attenuates faster while the rainfall decreases. The ability of Sansui single polarization radar to estimate the starting and ending time of precipitation and the accumulated precipitation is obviously insufficient, while the Rongjiang dual polarization radar QPE product for the starting and ending time of precipitation and the quantitative estimation result of precipitation is basically close to the actual situation, which has high reference value in business applications. |
| Key words: Qiandongnan； C-band； dual polarization radar； QPE |
