| 基于多源资料的积层混合云降水微物理特征 |
| |
| 引用本文： | 王洪,张佃国,王文青,王俊,李毅,王烁.基于多源资料的积层混合云降水微物理特征[J].大气科学,2022,46(4):886-902. |
| |
| 作者姓名： | 王洪 张佃国 王文青 王俊 李毅 王烁 |
| |
| 作者单位： | 1.山东省气象科学研究所, 济南 250031 |
| |
| 基金项目： | 山东省自然科学基金项目ZR2020MD054，国家重点研发计划项目2018YFC1507903，国家自然科学基金41875172、42075192，中国气象局云雾物理环境重点开放实验室开放课题2019Z01607，山东省气象局项目2020sdqxz08 |
| |
| 摘 要： | 基于地基云雷达、微雨雷达和天气雷达等遥测设备观测资料，结合挂载KPR云雷达和DMT粒子测量系统的飞机平台，详细分析了山东积层混合云降水过程的云降水微物理结构特征。结果表明，积层混合云降水过程呈现层状云和对流云降水特征。零度层以上，5～6 km高度层内，对流云降水多普勒速度和谱宽均大于层状云，说明对流云降水环境垂直气流、粒子尺度等均大于层状云。对流云降水，云雷达和微雨雷达时空剖面上出现由衰减造成的“V”字形缺口，云雷达衰减程度大于微雨雷达，且随高度增加，衰减越大。层状云降水，零度层亮带附近，雷达反射率因子跃增高度比多普勒速度高80 m，多普勒速度跃增高度又比谱宽高20 m。降水云系零度层附近降水机制复杂，粒子形态有辐枝冰晶聚合物、针状冰晶聚合物和云滴；0°C层以上，5～6 km处，对流云降水的多普勒速度和谱宽均大于层状云降水，即对流云降水环境垂直气流、粒子尺度范围等均大于层状云降水。
|
| 关 键 词： | 积层混合云 微物理特征 微雨雷达 云雷达 机载观测 |
| 收稿时间： | 2021-03-12 |
Microphysical Characteristics of Stratiform Precipitation with Embedded Convection Based on Multisource Data |
| |
| Affiliation: | 1.Shandong Institute of Meteorological Sciences, Jinan 2500312.Shandong Weather Modification Office, Jinan 2500313.Key Laboratory for Cloud Physics of China Meteorological Administration, Beijing 1000814.Xi’an Huateng Microwave Co., LTD, Xi’an 710119 |
| |
| Abstract: | Based on the ground-based microrain radar and cloud radar, combined with aircraft observation, stratiform precipitation with embedded convection is analyzed to accurately study the cloud precipitation’s microphysical structure. Results show that: (1) The selected precipitation process is divided into stratified cloud and convective cloud. Above the zero-degree layer, especially at the height of 5–6 km, the Doppler velocity and the spectrum width of convective precipitation are greater than those of stratiform cloud precipitation. This indicates that the vertical wind of the environment and the size range of the particle occurring in convective precipitation are greater than those of stratiform precipitation. (2) At the period of convective precipitation, there is a “V” glyph gap caused by the attenuation in the radar reflectivity of the cloud and microrain radars in the time and height profiles. The attenuation of the cloud radar is greater than that of the microrain radar. The higher the height, the greater is the attenuation. (3) At the period of stratiform precipitation, near the bright band, the leap increase height of the radar reflectivity factor is 80 m higher than that of the Doppler velocity, and the leap increase height of the Doppler velocity is 20 m higher than that of the spectral width. (4) The precipitation mechanism near the 0°C layer is complex. When the negative temperature is close to 0°C, the particle morphology includes radiated dendritic ice crystals, acicular ice crystals, and cloud droplets. The Doppler velocity and the spectral width of convective cloud precipitation are greater than those of stratiform precipitation above the 0°C layer, especially at altitudes of 5 and 6 km. The vertical airflow and the scale range of small and large particles in convective precipitation are greater than those of stratiform cloud precipitation. |
| |
| Keywords: | |
|
| 点击此处可从《大气科学》浏览原始摘要信息 |
|
点击此处可从《大气科学》下载全文 |
|
