X波段双线偏振雷达青藏高原观测资料质量分析

Data Quality Analysis of X-band Dual Linear Polarization Radar on Qinghai-Tibetan Plateau

云团东移研究项目组计划于2018—2019年夏季利用高原综合观测网对高原东移云团进行重点加密观测,通过获得水汽、云、降水粒子相态分布等云降水物理过程的新数据来深入研究夏季青藏高原云团东移引发长江流域暴雨的机理。本文以布设在四川甘孜的X波段双线偏振雷达2017年9—10月开展预观测试验获取的降水资料为例,分析了该设备在高原上的探测性能及观测资料质量。结果表明:预观测试验期间雷达性能稳定,获得的资料质量整体较好;经过订正处理后的雷达数据能客观反映实际的降水特征,可为观测试验的后续开展以及云和降水物理过程参数化方案研究奠定基础。

In order to further study the mechanism of the Qinghai-Tibetan plateau eastward clouds which trigger the heavy rainfall in Yangtze river basin in summer,the research project group plans to make intensive observation on the cloud eastward movement of the plateau in the summer of 2018-2019 by using the plateau comprehensive observation network to obtain the new data of cloud precipitation physical processes including water vapor,cloud,precipitation particle phase distribution and so on.In this paper,based on precipitation observation data of X-band dual linear polarization radar at Ganzi,Sichuan province during the pre-observation test period from September to October in 2017,the observation data quality and its detection ability are presented.The analysis results indicate that the performance of the radar system is stable during that period.In general,the polarization radar data quality is good,and the corrected radar data can reflect the actual polarization characteristics of precipitation particles,which can lay a foundation for the follow-up of field observation experiment and the study on the parameterization scheme of cloud and precipitation physical process.