干旱区研究2025，Vol.42Issue(2)：212-222,11.DOI:10.13866/j.azr.2025.02.03
祁连山中部一次层状云降水云微物理特征的飞机观测研究
Aircraft observation of the cloud microphysical characteristics of stratocumulus precipitation in the Qilian Mountains
摘要
Abstract
The microphysical characteristics of a stratiform precipitation cloud in the central Qilian Mountains on August 27,2022,were analyzed through aircraft measurements.The results revealed significant differences in the cloud microphysical characteristics with different altitudes and regions.The supercooled liquid water content de-creased as the altitude increased.In the-6℃to-3℃layer,the mean supercooled liquid water content was about 0.05 g·m-3,while in the higher layer of-15℃to-12℃,the supercooled liquid water content was only 0.015 g·m-3,less than one-third of the lower layer.The riming process is essential in the growth of particles at all altitudes,with the mean diameter of the particles in the cloud reaching several hundred micrometers.Combining riming and aggregation processes can result in a particle spectrum width of over 6 mm.The mean diameter of the parti-cles in the-6℃to-3℃layer was smaller than that in the upper layer,which may be caused by the evaporation and fragmentation of large particles while falling.On the mountain's southwestern side,the low-level southerly wind with moisture lifted by the topography resulted in condensation and the production of numerous cloud drop-lets.The small particle concentration on the mountain's southwestern side is one order of magnitude higher than that on the northeastern side,and the supercooled liquid water content is also higher.On the mountain's south-western side,the cloud particles are mainly supercooled cloud droplets and graupel particles;the aggregation pro-cess is not obvious,and the particle concentration is high.On the northeastern side,aggregated ice particles and graupels dominate,and the low concentration of small particles leads to a larger mean size of cloud particles.关键词
云微物理特征/飞机探测/地形层状云/祁连山Key words
cloud microphysical characteristics/aircraft observation/orographic stratiform clouds/Qilian Moun-tains引用本文复制引用
付双喜,亓鹏,常祎,把黎,陈祺..祁连山中部一次层状云降水云微物理特征的飞机观测研究[J].干旱区研究,2025,42(2):212-222,11.基金项目
国家自然科学基金区域创新发展联合基金重点项目(U24A20604) （U24A20604）
国家重点研发计划(2019YFC1510302) （2019YFC1510302）
甘肃省自然科学基金(21JR7RA711) （21JR7RA711）
中国气象局云降水物理与人工影响天气重点开放实验室创新基金项目(2023CPML-C02) （2023CPML-C02）
中国气象局创新发展专项重点项目(CXFZ2025J036)共同资助 （CXFZ2025J036）
