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DOI | 10.1175/JAS-D-18-0146.1 |
Estimating Turbulence Kinetic Energy Dissipation Rates in the Numerically Simulated Stratocumulus Cloud-Top Mixing Layer: Evaluation of Different Methods | |
Akinlabi, Emmanuel O.1; Waclawczyk, Marta1; Mellado, Juan Pedro2; Malinowski, Szymon P.1 | |
2019-05-01 | |
发表期刊 | JOURNAL OF THE ATMOSPHERIC SCIENCES
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ISSN | 0022-4928 |
EISSN | 1520-0469 |
出版年 | 2019 |
卷号 | 76期号:5页码:1471-1488 |
文章类型 | Article |
语种 | 英语 |
国家 | Poland; Germany |
英文摘要 | In this work, direct numerical simulation (DNS) of the stratocumulus cloud-top mixing layer is used to test various approaches to estimate the turbulence kinetic energy (TKE) dissipation rate epsilon from one-dimensional (1D) intersections that resemble experimental series. Results of these estimates are compared with "true" (DNS) values of epsilon in buoyant and inhomogeneous atmospheric flows. We focus on recently proposed methods of the TKE dissipation-rate retrievals based on zero crossings and recovering the missing part of the spectrum. These methods are tested on fully resolved turbulence fields and compared to standard retrievals from power spectra and structure functions. Anisotropy of turbulence due to buoyancy is shown to influence retrievals based on the vertical velocity component. TKE dissipation-rate estimates from the number of crossings correspond well to spectral estimates. The method based on the recovery of the missing part of the spectrum works best for Pope's model of the dissipation spectrum and is sensitive to external intermittency. This allows for characterization of external intermittency by the Taylor-to-Liepmann scale ratio. Further improvements of this method are possible when the variance of the velocity derivative is used instead of the number of zero crossings per unit length. In conclusion, the new methods of TKE dissipation-rate retrieval from 1D series provide a valuable complement to standard approaches. |
英文关键词 | Clouds Data processing Measurements Statistics Time series Clouds |
领域 | 地球科学 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467955800003 |
WOS关键词 | MARINE STRATOCUMULUS ; ZERO-CROSSINGS ; WIND SHEAR ; SPECTRA ; ENTRAINMENT ; INTERMITTENCY ; FLUCTUATIONS ; PHYSICS ; DRIVEN ; MODEL |
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/183029 |
专题 | 地球科学 |
作者单位 | 1.Univ Warsaw, Fac Phys, Inst Geophys, Warsaw, Poland; 2.Max Planck Inst Meteorol, Hamburg, Germany |
推荐引用方式 GB/T 7714 | Akinlabi, Emmanuel O.,Waclawczyk, Marta,Mellado, Juan Pedro,et al. Estimating Turbulence Kinetic Energy Dissipation Rates in the Numerically Simulated Stratocumulus Cloud-Top Mixing Layer: Evaluation of Different Methods[J]. JOURNAL OF THE ATMOSPHERIC SCIENCES,2019,76(5):1471-1488. |
APA | Akinlabi, Emmanuel O.,Waclawczyk, Marta,Mellado, Juan Pedro,&Malinowski, Szymon P..(2019).Estimating Turbulence Kinetic Energy Dissipation Rates in the Numerically Simulated Stratocumulus Cloud-Top Mixing Layer: Evaluation of Different Methods.JOURNAL OF THE ATMOSPHERIC SCIENCES,76(5),1471-1488. |
MLA | Akinlabi, Emmanuel O.,et al."Estimating Turbulence Kinetic Energy Dissipation Rates in the Numerically Simulated Stratocumulus Cloud-Top Mixing Layer: Evaluation of Different Methods".JOURNAL OF THE ATMOSPHERIC SCIENCES 76.5(2019):1471-1488. |
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