风切变对深厚对流边界层夹卷过程的调控特征

张海亮; 尹金方; 何清; 买买提艾力·买买提依明

doi:10.12057/j.issn.2097-6801.2506.10251

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风切变对深厚对流边界层夹卷过程的调控特征

研究论文 | 更新时间：2026-03-17

- 风切变对深厚对流边界层夹卷过程的调控特征
- Influence of Wind Shear on the Entrainment Process in Deep Convective Boundary Layers
- 沙漠与绿洲气象 2025年19卷第6期页码：122-131
- 作者机构：
  
  1.中国气象局乌鲁木齐沙漠气象研究所，新疆乌鲁木齐 830002
  2.中国气象科学研究院灾害天气国家重点实验室，北京 100081
  3.新疆大学地理与遥感科学学院，新疆乌鲁木齐 830046
  4.达坂城国家综合气象观测专项试验外场基地；新疆乌鲁木齐 830002
- 作者简介：
  
  张海亮，主要从事大气边界层物理与大气湍流研究。E-mail： zhanghl@idm.cn
  何清，主要从事沙漠气候研究。E-mail： qinghe@idm.cn
- 基金信息：
  
  新疆维吾尔自治区自然科学基金(2022D01A368);灾害天气国家重点实验室开放课题(2022LASW-B04);“天山英才”培养计划—科技创新团队（天山创新团队）项目(2022TSYCTD0007);第三次新疆科学考察研究计划(2021xjkk030501);新疆维吾尔自治区自然科学基金(2024D01A152)
- DOI：10.12057/j.issn.2097-6801.2506.10251
  中图分类号： P425;P456.7
- 收稿：2025-06-10，
  
  修回：2025-08-12，
  
  纸质出版：2025-12-28
- 稿件说明：
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张海亮,尹金方,何清,等.风切变对深厚对流边界层夹卷过程的调控特征[J].沙漠与绿洲气象,2025,19(6):122-131.

ZHANG Hailiang,YIN Jinfang,HE Qing,et al.Influence of Wind Shear on the Entrainment Process in Deep Convective Boundary Layers[J].Desert and Oasis Meteorology,2025,19(6):122-131.
张海亮,尹金方,何清,等.风切变对深厚对流边界层夹卷过程的调控特征[J].沙漠与绿洲气象,2025,19(6):122-131. DOI： 10.12057/j.issn.2097-6801.2506.10251.

ZHANG Hailiang,YIN Jinfang,HE Qing,et al.Influence of Wind Shear on the Entrainment Process in Deep Convective Boundary Layers[J].Desert and Oasis Meteorology,2025,19(6):122-131. DOI： 10.12057/j.issn.2097-6801.2506.10251.

摘要

利用大涡模拟实验，系统探讨垂直风切变（简称“风切变”）对夹卷过程的调控特征。结果表明：（1）风切变降低了由浮力驱动的混合层垂直感热输送效率和夹卷区的夹卷效率，导致在弱风切变条件下显著抑制夹卷过程。（2）随风切变增强，夹卷区整体理查森数迅速下降。当理查森数低于某一临界值时，剪切湍动能（TKE）显著增强。该临界值在热羽扰动下可能远高于0.25。（3）在强风切变条件下，夹卷区内剪切TKE大幅增强，显著强化夹卷过程。（4）地表感热通量和大气层结稳定度对整体理查森数、夹卷感热通量比及强弱风切变条件下的CBL高度差具有显著影响。

Abstract

　In this study

large eddy simulations are employed to systematically investigate the regulatory effects ofvertical wind shear on the entrainment process. The main findings are as follows: (1) Wind shear reduces the efficiencyof vertical heat transport within the mixed layer and the entrainment efficiency in the entrainment zone

significantlysuppressing the entrainment process under weak wind shear conditions. (2) As wind shear intensifies

the bulkRichardson number in the entrainment zone decreases rapidly. When the Richardson number falls below a certaincritical threshold

shear-generated turbulent kinetic energy (TKE) is substantially enhanced. This threshold can beconsiderably higher than the conventional value of 0.25 under thermal plume disturbances. (3) Under strong wind shearconditions

the shear-induced TKE in the entrainment zone increases significantly

markedly enhancing the entrainmentprocess. (4) Surface sensible heat flux and atmospheric stratification stability have notable impacts on the Richardsonnumber

the entrainment flux ratio

and the differences in convective boundary layer (CBL) height between strong andweak shear conditions. This study contributes to a comprehensive understanding of the role of wind shear in regulatingthe entrainment process

providing valuable insights for improving the parameterization of entrainment in atmosphericmodels.

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references

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