doi:  10.3878/j.issn.1006-9895.1705.16291
黄山层状云和对流云降水不同高度的雨滴谱统计特征分析

Statistical Characteristics of Raindrop Size Distribution from Stratiform and Convective at Different Altitudes on Mt. Huang
摘要点击 234  全文点击 21  投稿时间:2016-12-22  最后修改时间:2017-04-12
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基金:  国家自然科学基金项目(41030962);江苏高校优势学科建设工程资助项目(PAPD)
中文关键词:  黄山  雨滴谱  海拔高度  对流云降水  层状云降水
英文关键词:  Mt. Huang  raindrop size distribution  altitude  convective precipitation  stratiform precipitation
           
作者中文名作者英文名单位
李慧LI Hui南京信息工程大学 气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室
银燕YIN Yan南京信息工程大学 气象灾害预报预警与评估协同创新中心/中国气象局气溶胶与云降水重点开放实验室
单云鹏Division of Atmospheric Science,Desert Research Institute,NV Reno
金祺安徽省人工影响天气办公室
引用:李慧,银燕,单云鹏,金祺.2018.黄山层状云和对流云降水不同高度的雨滴谱统计特征分析[J].大气科学
Citation:LI Hui,YIN Yan.2018.Statistical Characteristics of Raindrop Size Distribution from Stratiform and Convective at Different Altitudes on Mt. Huang[J].Chinese Journal of Atmospheric Sciences (in Chinese)
中文摘要:
      根据2011年6 ~7月在黄山不同高度采用PARSIVEL雨滴谱仪测得的雨滴谱数据,对不同海拔高度上两类(层状云和对流云)降水粒子谱的微物理特征量、Gamma函数拟合以及雨滴的下落速度进行对比分析,结果表明:对流云降水的雨水含量和降水强度、雨滴的各类尺度参数和数浓度都比相同位置上层状云降水的大,同类降水中,山腰的雨滴尺度大于山顶和山底,这可能与各观测点和云底相对位置的不同有关;随降水强度增加,雨滴的质量加权平均直径Dm逐渐增大,广义截距参数(Log10Nw)的标准差逐渐减小。拟合结果表明各高度的雨滴谱都比较符合Gamma分布,由拟合参数分析雨滴谱的演变,发现相对于对流云降水,层状云降水粒子谱随高度的变化较小,雨滴谱的演变较为稳定。此外,本文还对两类降水中雨滴的下落速度及影响落速的因素进行了分析。
Abstract:
      Based on the raindrop size distribution (RSD) data observed with PARSIVEL disdrometers at different altitudes on Mt. Huang from June to July 2011, comparison and analysis the microphysical parameters and Gamma function fitting of raindrop spectrum as well as the fall velocity of drops for different altitudes and different rain types (stratiform and convective). Results show that the convective precipitation has higher rainwater content, more intense rainfall rate, larger raindrops and higher raindrop concentrations compared with the stratiform precipitation in the same height; for both convective and stratiform rain, the diameter of raindrops in mountainside is larger than that in mountaintop and mountain bottom, which is related to the different relative positions with the cloud bases. With increasing rain rates, the mass-weighted mean diameter (Dm) of raindrops and the standard deviation of generalized intercept parameters (Log10Nw) are increase and decrease, respectively. The RSD from all sampling positions are in good agreement with gamma distribution, then investigate the evolution of raindrop spectrum using the three fitting parameters, found that compared with the convective ones, the RSD for stratiform precipitation has weaker variations between different altitudes, suggests that its evolution is more stable. Finally, the raindrop fall velocity as well as the influence factors of the speed are studied.
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