气候变化领域集成服务门户(CCPortal): Impact of a Nocturnal Low-Level Jet on Surface-Layer Turbulent Characteristics

CCPortal

DOI	10.1029/2020JD034083
	Impact of a Nocturnal Low-Level Jet on Surface-Layer Turbulent Characteristics
	Brunsell N.A.; Rahn D.A.; Mechem D.B.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	The impact of the Great Plains Low-Level Jet (GPLLJ) on the surface-layer turbulent characteristics is investigated using a long-term data set of eddy-covariance observations. The presence of the GPLLJ alters the distribution of the normalized wind velocity standard deviations and the turbulent intensity. Spectral analysis indicates that the presence of the GPLLJ can alter the low-frequency contribution in the u-spectra as well as the anisotropy of the u and w components of the flow. The intensity of the LLJ impacts the high-frequency contributions to the w-spectra. Using quadrant analysis to examine how the LLJ impacts sweeps and ejections, we find that the presence and the intensity of the LLJ alters the correlation between u and w. In addition, the intensity of the LLJ impacts the relative contribution from different quadrants to the overall flux and also impacts the third-order moments. Therefore, the presence of the LLJ alters surface-layer turbulence, while LLJ intensity appears to impact only a subset of these factors. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	low-level jet; surface layer; turbulence
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185346
作者单位	Department of Geography and Atmospheric Science, University of Kansas, Lawrence, KS, United States
推荐引用方式 GB/T 7714	Brunsell N.A.,Rahn D.A.,Mechem D.B.. Impact of a Nocturnal Low-Level Jet on Surface-Layer Turbulent Characteristics[J],2021,126(7).
APA	Brunsell N.A.,Rahn D.A.,&Mechem D.B..(2021).Impact of a Nocturnal Low-Level Jet on Surface-Layer Turbulent Characteristics.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Brunsell N.A.,et al."Impact of a Nocturnal Low-Level Jet on Surface-Layer Turbulent Characteristics".Journal of Geophysical Research: Atmospheres 126.7(2021).