Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1175/JAS-D-17-0050.1 |
Coherent Structures in Large-Eddy Simulations of a Nonprecipitating Stratocumulus-Topped Boundary Layer | |
Davini, Paolo1; 39;Andrea, Fabio2 | |
2017-12-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES |
ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2017 |
卷号 | 74期号:12 |
文章类型 | Article |
语种 | 英语 |
国家 | France; Italy; USA |
英文摘要 | The properties of coherent convective structures are analyzed in a nonprecipitating marine nocturnal stratocumulus-topped boundary layer (STBL) with a series of high-resolution large-eddy simulations (LESs). A new classification method based on octant analysis-using vertical velocity and two passive scalars-is introduced to systematically define convective structures in both the cloudy and the cloud-free regions. It is therefore possible to detect and track updrafts, downdrafts, and their turbulent shells (both ascending and subsiding), together with the entraining air from the inversion layer or the free troposphere. The geometrical and thermodynamical characteristics (e.g., areal fraction, temperature, liquid and total water mixing ratio, buoyancy) of those structures are then accurately described, and particular attention is given to their respective contributions to the turbulent transport of mass, heat, and moisture. It is shown that updrafts, downdrafts, and entrainment are equally important to describe the STBL dynamics. Conversely, it is found that shells, although they partially contribute to the mass transport, have a negligible contribution to the turbulent fluxes of heat and moisture. |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000427864800006 |
WOS关键词 | STRATIFORM CLOUDS ; SUBSIDING SHELLS ; MIXED LAYERS ; ENTRAINMENT ; TURBULENT ; STRATUS ; MODEL ; REPRESENTATION ; STATISTICS ; RESOLUTION |
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/29801 |
专题 | 地球科学 |
作者单位 | 1.PSL Res Univ, CNRS, Ecole Normale Super, Lab Meteorol Dynam IPSL, Paris, France; 2.CNR, Ist Sci Atmosfera Clima, Turin, Italy; 3.Columbia Univ, Earth Inst, Dept Earth & Environm Engn, New York, NY USA |
推荐引用方式 GB/T 7714 | Davini, Paolo,39;Andrea, Fabio. Coherent Structures in Large-Eddy Simulations of a Nonprecipitating Stratocumulus-Topped Boundary Layer[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2017,74(12). |
APA | Davini, Paolo,&39;Andrea, Fabio.(2017).Coherent Structures in Large-Eddy Simulations of a Nonprecipitating Stratocumulus-Topped Boundary Layer.JOURNAL OF THE ATMOSPHERIC SCIENCES,74(12). |
MLA | Davini, Paolo,et al."Coherent Structures in Large-Eddy Simulations of a Nonprecipitating Stratocumulus-Topped Boundary Layer".JOURNAL OF THE ATMOSPHERIC SCIENCES 74.12(2017). |
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