摘要
在作者先前开发的SimRAD软件平台上添加了融化层中融化粒子散射特性的计算,从而在给定雷达发射频率,大气状态参数(高度、气压、气温、相对湿度)以及水成物相态、滴谱分布、含水量等信息的条件下,定量模拟出含有融化层的层状云的雷达反射率因子。模拟结果与大量雷达观测资料得出的层状云零度层亮带的回波特征相符合。并在此模拟的基础之上进行了零度层亮带对粒子融化速度和粒子群谱分布的敏感性试验,发现零度层亮带的雷达反射率因子廓线对二者均有一定的敏感性。
Codes for calculating scattering characteristics of melting particles in the melting layer of a cloud are added into SimRAD, a software developed by the authors for simulating radar observations and data processing, to simulate vertical profiles of observations of radar reflectivity factor for clouds within a melting layer for given radar frequencies, atmospheric parameters （pressure, temperature, relative humidity at different heights）, and phase state, size spectrum and content of hydrometeors, etc. The simulation result fits echo traits of the bright band of stratiform clouds supported by abundant radar observation data. Besides, this paper carries out experiments on sensitivity of radar reflectivity factor of the bright band to the melting speed and distribution of particles. The latter two are found to respond to the former.
出处
《热带气象学报》
CSCD
北大核心
2013年第1期136-142,共7页
Journal of Tropical Meteorology
基金
国家自然科学基金(41275043
40875016)
国家高技术研究发展计划(863
2007AA061901)
教育部高等学校博士学科点专项科研基金(20060300002)共同资助
关键词
零度层亮带
融化层
外包水膜粒子
雷达反射率因子
radar bright band
melting layer
ice particle enclosed with liquid water
radar reflectivity factor
