主办单位：中国气象局沈阳大气环境研究所
国际刊号：ISSN 1673-503X
国内刊号：CN 21-1531/P
气象与环境学报

气象与环境学报 ›› 2021, Vol. 37 ›› Issue (3): 110-116.doi: 10.3969/j.issn.1673-503X.2021.03.015

• 论文 • 上一篇    下一篇

河北省冬季低槽冷锋层状云结构特征和可播性分析

刘伟1,2(),孙玉稳3,4,*(),谢祥永5,孙啸申4,赵志军4,黄毅4   

  1. 1. 石家庄市气象局, 河北 石家庄 050081
    2. 中国气象局云雾物理环境重点开放实验室, 北京 100081
    3. 河北省气象与生态环境重点实验室, 河北 石家庄 050021
    4. 河北省人工影响天气办公室, 河北 石家庄 050021
    5. 邯郸市气象局, 河北 邯郸 056000
  • 收稿日期:2020-04-29 出版日期:2021-06-30 发布日期:1900-01-01
  • 通讯作者: 孙玉稳 E-mail:757016561@qq.com;syw2141@sina.com
  • 作者简介:刘伟, 男, 1987年生, 工程师, 主要从事天气预报研究工作, E-mail: 757016561@qq.com
  • 基金资助:
    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);河北省重点研发计划项目“飞机人工增雨云系结构及作业技术的观测研究”(20375402D);中国气象局云雾物理环境重点开放实验室开放课题“华北地区过冷水云AgI飞机催化物理响应观测研究”(2019Z01601)

Analysis of the structure characteristics and seeding possibility of low trough cold front stratiform cloud in winter in Hebei province

Wei LIU1,2(),Yu-wen SUN3,4,*(),Xiang-yong XIE5,Xiao-shen SUN4,Zhi-jun ZHAO4,Yi HUANG4   

  1. 1. Shijiazhuang Meteorological Service, Shijiazhuang 050081, China
    2. Key Laboratory for Cloud Physics of China Meteorological Administration Beijing 100081, China
    3. Key Laboratory of Meteorology and Ecology of Hebei, Shijiangzhuang 050021, China
    4. Hebei Weather Modification Office, Shijiazhuang 050021, China
    5. Handan Meteorological Service, Handan 056000, China
  • Received:2020-04-29 Online:2021-06-30 Published:1900-01-01
  • Contact: Yu-wen SUN E-mail:757016561@qq.com;syw2141@sina.com

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摘要：

2018年1月6日河北省出现一次低槽冷锋天气系统，利用两次云粒子垂直探测资料分析层状云结构特征和演化规律，探讨冬季低槽冷锋系统层状云催化条件和催化时机。结果表明：天气系统初期西南风风速中心发生在6500 m高空时，风速随高度呈不连续分布，层状云云顶温度为-29.2℃，中低云层稀薄；3000 m以上云层粒子基本被冰化，云内过冷水含量小于0.05 g·m-3，固态含水量为0.1 g·m-3左右，3000 m以下云层有大量自然冰晶，过冷水低于0.15 g·m-3，不具备催化条件。700—3000 m高度层西南风加强，云内过冷水含量普遍大于0.1 g·m-3；2200 m风速中心风速达16 m·s-1，该高度最大液态水含量达0.38 g·m-3，冰晶浓度为6 L-1，温度为-9℃，适宜催化。低槽冷锋天气系统层状云结构特征和催化条件受槽前西南风强弱和风速中心高度影响，天气系统初期层状云云顶过高、温度过低时，层状云为不可播云。随槽线东移，风速中心高度降低，3000 m以下西南风加强，层状云转变为可播云。

关键词: 层状云, 云结构, 可播性

Abstract:

A low trough cold front precipitation process occurred on January 6, 2018, in Hebei province.Based on two sets of aircraft detection data, macro and micro cloud structure and cloud development process were analyzed, and the catalytic condition and seeding opportunity for the stratiform cloud in low trough cold front system in winter were investigated.The results show that when the wind center of southwest wind occurred at an altitude of 6500 m at the beginning of the weather system, the wind speed was discontinuously distributed with the height, the cloud top temperature of stratiform cloud was around-29.2℃, and the low and middle clouds were thin.At the same time, cloud particles above 3000 m were glaciated, the supercooled water content in the cloud was less than 0.05 g·m-3, and the solid water content was about 0.1 g·m-3.Meanwhile, there were a lot of natural ice crystals in the cloud below 3000 m, and the supercooled water content was less than 0.15 g·m-3, which was not available for seeding.At the height of 700-3000 m, the southwesterly wind was strengthened, the supercooled water content in the cloud was generally larger than 0.1 g·m-3, and the wind speed at the wind center at 2200 m was 16 m·s-1, and the maximum liquid water content at this height was 0.38 g·m-3, and ice crystal concentration was 6 L-1, and the temperature was-9℃, which was suitable for seeding.The structure characteristics and seeding conditions of stratiform clouds in this low cold front weather system were affected by the intensity of the southwest wind ahead of the trough and the height of the wind center.Because the top of the stratiform cloud was too high and the temperature was too low in the early stage of the weather system, this cloud system was not in favor of seeding.As the trough line moved eastward, the wind center height decreased and the southwesterly wind below 3000 m was intensified, this stratiform cloud was transformed into the cloud available for seeding.

Key words: Stratiform clouds, Cloud structure characteristics, Seeding possibility

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