基于双偏振雷达和降水现象仪的郑州“7·20”极端强降水微物理特征分析
作者:
作者单位:

作者简介:

通讯作者:

中图分类号:

基金项目:

中国气象局河南省农业气象保障与应用技术重点实验室应用技术研究基金项目(KY202028;KY202340);北极阁开放研究基金(BJG202211)


Analysis of the microphysical characteristics of the “7·20” extremely heavy rainfall in Zhengzhou based on dual-polarization radar and precipitation phenomenon instrument data
Author:
Affiliation:

Fund Project:

  • 摘要
  • |
  • 图/表
  • |
  • 访问统计
  • |
  • 参考文献
  • |
  • 相似文献
  • |
  • 引证文献
  • |
  • 文章评论
  • |
  • 资源附件
    摘要:

    利用降水现象仪、双偏振雷达、常规气象观测资料和再分析数据,分析了郑州“7·20”极端强降水过程的微物理特征。此次过程受多尺度天气系统的共同影响,为复杂多变的降水微物理特征提供了有利的环境条件。结果表明,此次过程地面雨滴谱分布随时间存在明显变化,雨滴谱参数分布较广,覆盖了从大陆性对流降水至海洋性对流降水的分布区域。20日16—17时最强降水时段,小粒子数密度显著高于东亚地区普通对流性降水的统计结果和华南地区夏季平均值,且存在大量大粒子,保证了极高的降水效率。双偏振雷达参量的垂直结构反演结果显示,对流系统质心低,具有典型的暖云特征;0 ℃层以上冰相过程相对活跃,0 ℃层以下强烈的暖雨过程,大量的冰相粒子落下并融化和低层高效率的雨滴碰并增长过程,导致各尺度高浓度雨滴的生成,最终形成地面的极端强降水。

    Abstract:

    Utilizing datasets from the precipitation phenomenon instrument in Zhengzhou,dual-polarization radars,conventional observations,and China’s First Generation Global Atmosphere and Land Reanalysis data,this study analyzes the microphysical characteristics of the “7·20” extremely heavy rainfall event in Zhengzhou.The occurrence of this extremely heavy rainfall was influenced by multiscale weather systems,creating conducive environmental conditions for the development of complex microphysical characteristics.The results reveal significant changes in raindrop size distributions over time,with raindrop size distribution parameters exhibiting a wide range of values.These parameters encompass distributions typically seen in continental convective precipitation as well as maritime convective precipitation.Notably,the density of small drops exceeded that of common convective precipitation observed in East Asia and South China during the summer.Simultaneously,a large number of large drops existed,contributing to heightened precipitation efficiency,particularly during the most intense precipitation period,which occurred from 16:00 BST to 17:00 BST on July 20th.The dual-polarization radar observations illustrated a low-centroid structure within the convective storm,indicative of warm cloud characteristics.Furthermore,the study highlights the significant role played by intense warm-rain processes beneath the 0 ℃ layer in the formation of this extremely heavy rainfall event.This role involved the melting of numerous ice particles and the facilitation of efficient growth in raindrop size.

    参考文献
    相似文献
    引证文献
引用本文

郭换换,王坤,2023.基于双偏振雷达和降水现象仪的郑州“7·20”极端强降水微物理特征分析[J].大气科学学报,46(5):713-724. GUO Huanhuan, WANG Kun,2023. Analysis of the microphysical characteristics of the “7·20” extremely heavy rainfall in Zhengzhou based on dual-polarization radar and precipitation phenomenon instrument data[J]. Trans Atmos Sci,46(5):713-724. DOI:10.13878/j. cnki. dqkxxb.20220715001

复制
分享
文章指标
  • 点击次数:
  • 下载次数:
  • HTML阅读次数:
  • 引用次数:
历史
  • 收稿日期:2022-07-15
  • 最后修改日期:2023-04-06
  • 录用日期:
  • 在线发布日期: 2023-10-26
  • 出版日期: 2023-09-28

地址:江苏南京宁六路219号南京信息工程大学    邮编:210044

联系电话:025-58731158    E-mail:xbbjb@nuist.edu.cn    QQ交流群号:344646895

大气科学学报 ® 2023 版权所有  技术支持:北京勤云科技发展有限公司