摘要
推导出了在云降水粒子群为小旋转椭球水滴群、椭球旋转轴呈正态分布、云降水粒子谱为M-P分布情况下的雷达气象方程,并且重新定义了相应的雷达反射率因子,确定了在用雷达测定非球形雨滴降水时的订正系数。为新一代多普勒天气雷达观测资料的雨滴形状和分布特征订正、提高降水测量精度提供了理论依据和方法。
A radar meteorological equation, which is applicable to small rotating spheroid raindrop groups, has been presented for polarized radar waves and radar reflectivity factors for normal distribution of rotary axes have been redefined. For radar observations of precipitation with non-spherical raindrops, correction coefficients have been numerically calculated and figured with different variances and expectations of axes orientation under the condition of normal distribution. The results provide a theoretical base for improving the accuracy of quantitative measurement of rainfall.
出处
《高原气象》
CSCD
北大核心
2007年第1期128-134,共7页
Plateau Meteorology
基金
国家自然科学基金项目(40275010)资助
关键词
小旋转椭球雨滴群
正态分布
雷达气象方程
雷达反射率因子
雷达定量测雨
Small rotating spheroid raindrop groups
Normal distribution
Radar meteorological equation
Radar reflectivity factor
Quantitative measurement rainfall of radar
