| 河北省一次降水云系云物理结构的飞机探测研究 |
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| 引用本文： | 康增妹,李忠亮,刘伟,董晓波,麦榕,孙玉稳.河北省一次降水云系云物理结构的飞机探测研究[J].气象与环境学报,2019,35(4):1-7. |
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| 作者姓名： | 康增妹 李忠亮 刘伟 董晓波 麦榕 孙玉稳 |
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| 作者单位： | 1. 河北省气象局, 河北 石家庄 050021;2. 西宁市气象局, 青海 西宁 810000;3. 石家庄市气象局, 河北 石家庄 050081;4. 河北省人工影响天气办公室, 河北 石家庄 050021;5. 河北省气象与生态环境重点实验室, 河北 石家庄 050021 |
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| 基金项目： | 科技部国家重点研发专项课题“气溶胶对流云降水相互作用机理研究及京津冀区域模式应用示范”（2017YFC1501403）、国家重点研发计划项目“人工影响天气理论基础、数值模拟技术研究”（2018YFC1507900）和河北省“十三五”气象重点工程“太行山东麓人工增雨防雹作业技术试验示范项目”（hbrywcsy-2017-8）共同资助。 |
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| 摘 要： | 利用机载粒子测量系统资料、天气雷达和Ka波段云雷达资料,分析了2017年5月22日河北省一次低槽冷锋降水过程积层混合云的微物理结构。结果表明:降水云系出现在低槽槽前西南气流中,积层混合云为大范围的层状云系中镶嵌大量对流云核结构,0℃层高度位于3577—4004m,随降水过程发展0℃层高度降低,嵌入的对流加强将抬升云顶高度。云内粒子浓度随云内对流的发生和加强而提高,云粒子浓度从1.8×10^5L^-1上升至5.0×10^5L^-1;云内过冷水含量大幅提高,从0.05g·m^-3上升至0.60g·m^-3,冷云中上层过冷水含量可长时间维持在0.20g·m^-3,中上层过冷水占比达60%。对流发生和加强可提高冰晶粒子增长速度,弱对流区冷云低层出现冰晶粒子浓度爆发增长区,强对流区冷云中上层成为冰晶粒子浓度快速增长区;最大降水粒子直径从8000μm增长至10000μm以上,直径在10000μm以上降水粒子谱分布区域从云底向中上层拓展。
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| 关 键 词： | 积层混合云 垂直探测 云微物理结构 云粒子浓度谱 |
| 收稿时间： | 2018-11-16 |
Aircraft observations on physical properties of precipitation clouds in Hebei province |
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| KANG Zeng-mei,LI Zhong-liang,LIU Wei,DONG Xiao-bo,MAI Rong,SUN Yu-wen.Aircraft observations on physical properties of precipitation clouds in Hebei province[J].Journal of Meteorology and Environment,2019,35(4):1-7. |
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| Authors: | KANG Zeng-mei LI Zhong-liang LIU Wei DONG Xiao-bo MAI Rong SUN Yu-wen |
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| Institution: | 1. Hebei Meteorological Service, Shijiazhuang 050021, China;2. Xining Meteorological Service, Xining 810000, China;3. Shijiazhuang Meteorological Service, Shijiazhuang 050081, China;4. Hebei Weather Modification Office, Shijiazhuang 050021, China;5. Hebei Key Laboratory of Meteorology and Ecology, Shijiazhuang 050021, China |
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| Abstract: | Based on data obtained from an airborne particle measurement system,weather radar,and Ka-band cloud radar,we analyzed the microphysical structure of mixed convective-stratiform clouds during a precipitation event caused by a low-trough cold front in Hebei province on May 22,2017.The results indicated that precipitation clouds are observed in the southwesterly flows ahead of a low trough.The mixed convective-stratiform clouds are large-scale stratiform clouds embedded with numerous convective-cloud-nuclei structures.The 0℃-layer height is about 3577-4004 m,and it decreases with the development of precipitation.The enhancement of embedded convection lifts the cloud top.The number concentration of cloud particles increases from 1.8×105 to 5.0×10-5 L-1 due to the occurrence and enhancement of convection in clouds.Meanwhile,the supercooled water content in the clouds rises significantly from 0.05 to 0.60 g·m-3.The supercooled water content in the upper layers of the cold clouds remains around 0.2 g·m-3 and accounts for 60% of the total liquid in the upper and middle layers.The growth rate of ice crystals is enhanced due to the adequate supply of supercooled liquid water.The ice crystal concentrations increase explosively in the lower layers of cold clouds in the presence of weak convection and increase rapidly in the upper and middle layers of the cold clouds in the presence of strong convection.The maximum diameter of precipitation particles increases from 8000 to more than 10000 μm and the spectral distribution of maximum precipitation particles with diameter larger than 10000 μm spans from the bottom to the upper-middle layers in the clouds. |
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| Keywords: | Mixed convective-stratiform clouds Vertical detection Cloud microphysical structure Cloud particle spectrum |
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