首页|祁连山冷锋过程中积层混合云微物理特征飞机观测研究

祁连山冷锋过程中积层混合云微物理特征飞机观测研究

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
利用高性能空中国王飞机搭载的DMT(Droplet Measurement Technologies)探测系统，分析2020年6月15-16日祁连山地区两次冷锋过程前后积层混合云的宏微观特征。结果表明:冷锋前 CIP(Cloud Imaging Probe)粒子平均浓度在 101～102 L-1，PIP(Precipitation Imaging Probe)粒子浓度在102 L-1;CIP粒子数浓度随高度逐渐上升，降水粒子在7 300 m时浓度达到峰值后下降;平均粒子谱拓宽速率为3。5 mm·km-1，随着高度的下降而降低。冷锋前存在对流泡区域，对流泡内粒子浓度均高出对流泡外，粒子谱拓宽速率高出层云一倍。冷锋后大CIP粒子粒子浓度为102 L-1，降水粒子浓度为 100～102L-1，粒子谱拓宽速率为1。5 mm·km-1，较冷锋前粒子谱拓宽速率小1。7倍。锋前后粒子均呈现多峰型;锋前积层混合云云中对流泡内外谱型一致，云顶处对流泡内外峰值粒径不同。锋前云粒子形状为聚合状、枝状、柱状和不规则状，以聚合状为主;云内冰晶以凇附和聚合增长为主;对流泡内外在粒子形态上没有明显差异。锋后粒子形状以不规则粒子为主，云粒子增长形式以聚合增长为主，并伴有上层云向下层播撒大云粒子的现象。
Aircraft observation study on microphysical characteristics of cumulus hybrid clouds during a cold front in Qilian Mountains
The DMT detection system carried by the high-performance King Air aircraft of the Qinghai Provincial Artificial Weather Office was used to analyze the macro and micro characteristics of cumulus hybrid clouds before and after the two cold front processes in the Qilian Mountains region on June 15 and 16,2020.Results show that:average CIP particle concentrations between 101-102 L-1 before the cold front,and precipitation particle concentrations at 102 L-1.The concentration of CIP particle number gradually increases with height,and the concentration of precipitation particles peaks at 7 300 m and then decreases;the average particle spectrum broadening rate was 4.5 mm·km-1,which decreases with height.The convective bubble region exists in front of the cold front,and the particle concentration inside it was higher than that outside,and the particle spectrum broadening rate was 1.5 times higher than that of the stratus cloud.(2)After the cold front,the particle concentration of large CIP particles was 102 L-1 and the particle concentration of PIP particles was 100-102 L-1,and the particle spectrum broadening rate was 2.6 mm·km-1,which was 1.7 times smaller than the particle spectrum broadening rate before the cold front.(3)Multi-peak type was the particle characteristic before and after the front.The spectral patterns of convective bubbles inside and outside the frontal cumulus mixed cloud were consistent,and the peak particle sizes inside and outside the convective bubbles at the cloud top were different.(4)The front cloud particle shape was aggregated,dendritic,columnar and irregular,with aggregation as the main shape.The freezing and aggregation growth was the form of ice crystal growth within the cloud.There was no obvious difference in particle morphology inside and outside the convective bubble.The particle shape after the front was dominated by irregular particles,and the cloud particle growth form was dominated by aggregation growth,and accompanied by the phenomenon of sowing large cloud particles from the upper cloud to the lower layer.

Qilian mountainaircraft measurementscloud microphysical characteristiccloud microphysical characteristicscloud particle spectrum

张玉欣、韩辉邦、康晓燕、郭世钰

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青海省气象灾害防御技术中心,西宁 810000

青海省人工影响天气办公室,西宁 810000

青海省防灾减灾重点实验室,西宁 810000

祁连山 机载探测 积层混合云 云微物理特征 云粒子谱

国家重点研发计划资助项目第二次青藏高原综合科学考察研究青海省科技计划资助项目青海省气象局重点资助项目青海省防灾减灾重点实验室开放基金资助项目

2019YFC15103022019QZKK01042021-ZJ-T04QXZ2021-09QFZ-2021-Z12

2024

10.12306/2022jms.0032

气象科学
江苏省气象学会

气象科学

CSTPCD
影响因子：0.925
ISSN：1009-0827
年,卷(期)：2024.44(3)
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