An observational study on vertical raindrop size distributions during stratiform rain in a semiarid

来源 :Atmospheric and Oceanic Science Letters | 被引量 : 2次 | 上传用户:AdamMYS
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雨滴谱随高度变化的观测有助于我们改进雷达估雨精度和认识云雨微物理过程的特征。以往研究较少关注半干旱区的垂直雨滴谱及Z–R关系回归方法的不确定性。在我国半干旱区内蒙古锡林浩特地区,我们使用一台小型垂直指向测雨雷达MRR,观测了两次夏季层状云降雨过程的雨滴谱垂直分布,并利用强度顺序滤波(SIFT)方法计算了Z–R关系。结果表明:这两次层状云降雨过程在零度层以下的平均雨强、平均雨滴总数及Z–R关系的两个参数(a和b)垂直变化较小;利用SIFT方法计算的Z–R关系估算降雨比传统的最小二乘法准确。
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