Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-18-0325.1 |
The Universality of the Normalized Vertical Velocity Variance in Contrast to the Horizontal Velocity Variance in the Convective Boundary Layer | |
Zhou, Bowen1,2; Sun, Shiwei1,2; Sun, Jianning2; Zhu, Kefeng1,2 | |
2019-05-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
![]() |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:5页码:1437-1456 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The vertical turbulent velocity variance normalized by the convective velocity squared as a function of the boundary layer depth-normalized height [i.e., ] in the convective boundary layer (CBL) over a homogeneous surface exhibits a near-universal profile, as demonstrated by field observations, laboratory experiments, and numerical simulations. The profile holds over a wide CBL stability range set by the friction velocity, CBL depth, and surface heating. In contrast, the normalized horizontal turbulent velocity variance increases monotonically with decreasing stability. This study investigates the independence of the profile to changes in CBL stability, or more precisely, wind shear. Large-eddy simulations of several convective and neutral cases are performed by varying surface heating and geostrophic winds. Analysis of the turbulent kinetic energy budgets reveals that the conversion term between and depends almost entirely on buoyancy. This explains why does not vary with shear, which is a source to only. Further analysis through rotational and divergent decomposition suggests that the near-universal profile of is fundamentally related to the dynamics and interactions of local and nonlocal CBL turbulence. Specifically, the preferential interactions between local wavenumbers and the downscale energy cascade of CBL turbulence offer plausible explanations to the universal profile of . |
英文关键词 | Turbulence Boundary layer Large eddy simulations |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467955800001 |
WOS关键词 | LARGE-EDDY-SIMULATION ; NONHYDROSTATIC ATMOSPHERIC SIMULATION ; PREDICTION SYSTEM ARPS ; SHALLOW CUMULUS ; KINETIC-ENERGY ; TURBULENCE STRUCTURE ; ENTRAINMENT ZONE ; LABORATORY MODEL ; WIND ; DIVERGENT |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/183027 |
专题 | 地球科学 |
作者单位 | 1.Nanjing Univ, Minist Educ, Key Lab Mesoscale Severe Weather, Nanjing, Jiangsu, Peoples R China; 2.Nanjing Univ, Sch Atmospher Sci, Nanjing, Jiangsu, Peoples R China |
推荐引用方式 GB/T 7714 | Zhou, Bowen,Sun, Shiwei,Sun, Jianning,et al. The Universality of the Normalized Vertical Velocity Variance in Contrast to the Horizontal Velocity Variance in the Convective Boundary Layer[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(5):1437-1456. |
APA | Zhou, Bowen,Sun, Shiwei,Sun, Jianning,&Zhu, Kefeng.(2019).The Universality of the Normalized Vertical Velocity Variance in Contrast to the Horizontal Velocity Variance in the Convective Boundary Layer.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(5),1437-1456. |
MLA | Zhou, Bowen,et al."The Universality of the Normalized Vertical Velocity Variance in Contrast to the Horizontal Velocity Variance in the Convective Boundary Layer".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.5(2019):1437-1456. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论