干旱区生态环境知识资源中心(Arid): Surface Layer Turbulent Characteristics over the Complex Terrain of the Loess Plateau Semiarid Region

Arid

DOI	10.1155/2021/6618544
	Surface Layer Turbulent Characteristics over the Complex Terrain of the Loess Plateau Semiarid Region
	Zhang, Zhida; Liang, Jiening; Zhang, Min; Guo, Qi; Zhang, Lei
通讯作者	Liang, JN (corresponding author), Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Peoples R China.
来源期刊	ADVANCES IN METEOROLOGY
ISSN	1687-9309
EISSN	1687-9317
出版年	2021
卷号	2021
英文摘要	Surface layer turbulence has an important influence on land-air interactions and pollutant dispersion, and studying the characteristics of surface layer turbulence in complex terrain can contribute to understanding land-air interactions, improving model surface layer parameterization, and enhancing pollution prediction capabilities. The surface layer turbulence observations from the Semi-Arid Climate and Environment Observatory (SACOL) of Lanzhou University in 2008 were processed in this study. High-quality turbulence parameters were calculated, the statistical and transfer characteristics of turbulence were analyzed, and the formation of turbulence was assessed in terms of dynamics and thermodynamics. The atmospheric stability in the semiarid region of the Loess Plateau is basically dominated by neutral/near-neutral and weakly unstable/weakly stable conditions; this pattern is significantly different from the preponderance of unstable and stable layers at other sites. The turbulence intensity differs significantly in both the horizontal and vertical directions and basically shows the relationship I-u approximate to I-v>I-w. The mean values of I-u and I-v are 0.42 and 0.40, respectively, and the mean value of I-w is 0.14, which is different from the general pattern of I-u>I-v>I-w, indicating that the turbulence intensity at SACOL is characterized by a large lateral wind contribution. The dimensionless standard deviations of the nonneutral wind velocity components satisfy the 1/3rd law, and the dimensionless standard deviations of u, v, and w components are 3.35, 2.98, and 1.26, respectively, in the semiarid Loess Plateau. These values are larger than those over flat terrain. The contribution of the shear term to the formation of turbulence is greater than that of the buoyancy term, and the mean annual values of the shear term and the buoyancy in the kinetic energy budget equation in SACOL are 47.94 x 10(-4) m(2).s(-3) and 11.32 x 10(-4) m(2).s(-3), respectively. The annual mean values of the momentum transfer coefficient C-D and the heat transfer coefficient C-H under near-neutral conditions are 8.54 x 10(-3) and 2.52 x 10(-3), respectively.
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000667064100001
WOS关键词	FLUX-PROFILE RELATIONSHIPS ; STABLE BOUNDARY-LAYER ; WIND-SPEED ; SIMILARITY ; TEMPERATURE ; VARIANCE ; ENERGY ; HEAT ; STABILITY ; REGIMES
WOS类目	Meteorology & Atmospheric Sciences
WOS研究方向	Meteorology & Atmospheric Sciences
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368697
作者单位	[Zhang, Zhida; Liang, Jiening; Zhang, Min; Guo, Qi; Zhang, Lei] Lanzhou Univ, Coll Atmospher Sci, Minist Educ, Key Lab Semiarid Climate Change, Lanzhou 730000, Peoples R China; [Zhang, Lei] Lanzhou Univ, Collaborat Innovat Ctr Western Ecol Safety, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhida,Liang, Jiening,Zhang, Min,et al. Surface Layer Turbulent Characteristics over the Complex Terrain of the Loess Plateau Semiarid Region[J]. 兰州大学,2021,2021.
APA	Zhang, Zhida,Liang, Jiening,Zhang, Min,Guo, Qi,&Zhang, Lei.(2021).Surface Layer Turbulent Characteristics over the Complex Terrain of the Loess Plateau Semiarid Region.ADVANCES IN METEOROLOGY,2021.
MLA	Zhang, Zhida,et al."Surface Layer Turbulent Characteristics over the Complex Terrain of the Loess Plateau Semiarid Region".ADVANCES IN METEOROLOGY 2021(2021).