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 ›› 2022, Vol. 38 ›› Issue (3): 29-36.doi: 10.3969/j.issn.1673-503X.2022.03.004

• 论文 • 上一篇    下一篇

东北地区嵌入对流过程的数值模拟分析

卫甜1(),丁亨2,邱贵强3,樊瑞瑞2,姚佳林4   

  1. 1. 中国人民解放军63729部队, 山西 太原 030000
    2. 临汾市气象局, 山西 临汾 041000
    3. 山西省气象台, 山西 太原 030006
    4. 山西省气象灾害防御技术中心, 山西 太原 030032
  • 收稿日期:2021-04-02 出版日期:2022-06-28 发布日期:2022-07-23
  • 作者简介:卫甜, 女, 1989年出生, 工程师, 主要从事天气预报业务及研究, E-mail: 895854785@qq.com
  • 基金资助:
    山西省气象局重点项目(SXKZDTQ20195602)

Numerical simulation and analysis of the system of embedded convection clouds in Northeast China

Tian WEI1(),Heng DING2,Gui-qiang QIU3,Rui-rui FAN2,Jia-lin YAO4   

  1. 1. NO.63729 Troops of PLA, Taiyuan 030006, China
    2. Linfen Meteorological Service, Linfen 041000, China
    3. Shanxi Meteorological Observatory, Taiyuan 030006, China
    4. Meteorological Disaster Prevention Technology Center of Shanxi Province, Taiyuan 030032, China
  • Received:2021-04-02 Online:2022-06-28 Published:2022-07-23

摘要:

利用常规气象观测资料、NCEP FNL再分析资料以及中尺度WRF模式的数值模拟结果, 对2010年7月1日发生在辽宁地区的一次嵌入对流云的形成、演变过程进行了分析, 并对云中微物理特征进行了诊断。结果表明: WRF模式较理想地模拟出了此次对流过程。嵌入对流云是在大气上层分布有成片的层状云, 低层有零星的对流泡生成的情况下, 随着低层对流泡的不断发展壮大, 当其伸展至层云的高度时镶嵌其中而成; 嵌入的对流体在随层状云东移的过程中反复进行着并合、分裂过程, 而且分裂过程中出现明显的右移性对流体的选择性加强; 云系中不仅存在云水直接转化为雨水的暖云降水机制, 也存在有播撒—供应的冷云降水机制, 且成熟阶段冷、暖云降水机制均较为活跃; 物理量场上, 低层辐合高层辐散的强度在发展阶段最强, 最有利云系的发展。

关键词: 嵌入对流, 云系演变, 微物理特征

Abstract:

Based on the conventional meteorological observation data, the NCEP FNL(National Center for Atmospheric Research Final Analysis) reanalysis data and the numerical simulation results of the WRF(Weather Research and Forecasting) model, the formation and evolution process and the microphysical characteristics of the embedded convective clouds occurring in Liaoning province on July 1, 2010, were analyzed.The results show that the WRF model performs very well in simulating the convection process.The embedded convective cloud occurs in conditions where there are stratiform clouds in the upper atmosphere and scattered convective bubbles in the lower atmosphere.As the convective bubbles in the lower atmosphere develop and grow continuously, and till extend to the height of stratiform clouds, the embedded convective cloud is formed.With the eastward movement of the stratiform cloud, the embedded convective cells merge and split repeatedly, and the obvious right shift of the convective fluids appears in the splitting process.In the cloud system, there are not only warm cloud precipitation mechanisms that cloud water can be directly converted into the rain, but also cold cloud precipitation mechanisms of seeding-supplying.Both mechanisms are the most active in the mature stage.The intensity of convergence at a low level and divergence at a high level is the strongest in the development stage, which is the most favorable for the development of a cloud system.

Key words: Embedded Convection, Cloud evolution, Microphysical characteristics

中图分类号: