Coordinated Analysis of Fully Polarimetric CSU-CHILL Radar Signatures with Surface and Airborne Hydrometeor Images

本文提出了对CSU-CHILL极化雷达信号与地面和机载水文气象图像的协调分析，以及对CSU-CHILL极化雷达数据和来自两辆仪表式追逐车、机载成像探头和其他辅助地面观测的现场水文气象观测数据的协调分析，以评估和改进总体水文气象分类方案和降水估计算法。配备高体积粒子光谱仪(HVPS)的T-28飞机在1995年6月的一次部署中，在三次对流风暴和一次亮带事件中获得了高质量的水流星雨图像。一辆大通面包车是用从奥地利格拉茨的Joannum Research租来的2D视频视盘仪安装的。这辆面包车在暴雨和冰雹混合的情况下提供了高质量的图像数据(前视和侧视，垂直速度)，进行了多次风暴单元拦截。在1996/97年冬季期间，盘积仪有一段时间安装在CSU校园场地，另一段时间放置在NCAR马歇尔实地场地，在那里与其他辅助测量(测雪仪、Forvar复制)一起对各种冬季降水进行采样。第二辆追逐车配备了一个安装在车顶的冰雹捕集网(NCAR设计)和一个电容式雨量计。进行了多次冰雹截获，从而能够确定时间分辨的冰雹速率和大小分布。最近开发的解决比较高空雷达测量与地面仪器的问题的最佳面积算法将得到进一步改进和评估。这项提议寻求资金，用于全面分析这些现场水流星数据，以推进基于偏振的水流星分类方案，并更全面地评估混合相降水中的偏振雨率算法。

AbstractATM-9730231Bringi, V. N.Colorado State UniversityTitle: Coordinated Analysis of Fully Polarmetric CSU-CHILL Radar Signatures with Surface and Airborne Hydrometeor ImagesCoordinated analysis of CSU-CHILL polarimetric radar data and insitu hydrometeor measurements from two instrumented chase vans, airborne imaging probe, and other auxiliary surface observations is proposed for evaluating and improving bulk-hydrometeor classification schemes and precipitation estimation algorithms. The T-28 aircraft equipped with the High Volume Particle Spectrometer (HVPS) obtained high quality hydrometeor images in three convective storms and one bright-band event during a deployment in June 1995. One chase van was instrumented with the 2D-video disdrometer obtained on lease from Joanneum Research, Graz, Austria. Numerous storm cell intercepts were made with this van providing high quality image data (front and side views, vertical speed) in intense rain mixed at times with hail. During the 1996/97 winter season, the disdrometer was located for one period at the CSU campus site, and for another period at the NCAR Marshall field site where a variety of winter precipitation was sampled in conjunction with other auxiliary measurements (snow gauge, formvar replication). A second chase van was equipped with a roof-mounted hail catcher net (of NCAR design) and a capacitance rain gauge. Numerous hail intercepts were made enabling the determination of time-resolved hail rates and size distributions. Recently developed optimal area algorithms which address the problem of comparing radar measurements aloft with surface instruments will be further refined and evaluated. This proposal seeks funding for a comprehensive analysis of these insitu hydrometeor data to advance polarimetric-based hydrometeor classification schemes and more fully evaluate polarimetric rainrate algorithms in mixed phase precipitation.