Validation and Meteorological Applications of Quantitative Radar Rain Measurements

本研究的目的是：(1)通过比较降雨率(R)和雨水含量(W)的独立估计值，验证雷达技术在估算降雨率(R)和雨水含量(W)方面的最新进展；W和质量加权平均液滴直径Dm，使用VHF（有时同时使用UHF）剖面仪测量液滴尺寸分布，以同一采样体积同时估计，使用位于澳大利亚达尔文附近的气象局气象研究中心（BMRC） c波段极化雷达测量；(2)探讨利用水平和垂直极化差相位测量来校正衰减对c波段雷达功率测量的影响的优点，比较具体差相位和衰减系数之间的理论和实验关系，并利用达尔文附近风暴的c波段极化雷达测量来寻找云衰减的影响。

Jameson/Abstract ATM-9419523 The objectives of this research are: (1) to validate recent advances in radar techniques for estimating the rainfall rate (R) and rain water content (W) by comparing independent estimates of R, W and the mass weighted mean drop diameter Dm computed using VHF (and sometimes coincident UHF) profiler measurements of the drop size distribution to simultaneous estimates in the same sampling volumes calculated using measurements form the Bureau of Meteorological Research Centre (BMRC) C-band polarization radar located near Darwin, Australia; (2) to explore the merit of using measurements of the differential phase between horizontal and vertical polarizations to correct for the effects of attenuation on C-band radar power measurements, to compare theoretical and experimental relations between the specific differential phase and attenuation coefficients, and to look for the effect of cloud attenuation by using C-ban polarization radar measurements in storms near Darwin.