气候变化领域集成服务门户(CCPortal): Large eddy simulation of boundary-layer turbulence over the heterogeneous surface in the source region of the Yellow River

CCPortal

DOI	10.5194/acp-21-15949-2021
	Large eddy simulation of boundary-layer turbulence over the heterogeneous surface in the source region of the Yellow River
	Zhang Y.; Huang Q.; Ma Y.; Luo J.; Wang C.; Li Z.; Chou Y.
发表日期	2021
ISSN	1680-7316
起始页码	15949
结束页码	15968
卷号	21 期号:20
英文摘要	Lake breezes are proved by downdrafts and the divergence flows of zonal wind in the source region of the Yellow River (SRYR) in the daytime based on ERA-Interim reanalysis data. In order to depict the effect of the circulations induced by surface anomaly heating (patches) on the boundary-layer turbulence, the UK Met Office Large Eddy Model was used to produce a set of 1D strip-like surface heat flux distributions based on observations, which were obtained by a field campaign in the Ngoring Lake basin in the summer of 2012. The simulations show that for the cases without background wind, patch-induced circulations (SCs) promote the growth of convective boundary layer (CBL), enhance the turbulent kinetic energy (TKE), and then modify the spatial distribution of TKE. Based on phase-averaged analysis, which separates the attribution from the SCs and the background turbulence, the SCs contribute no more than 10% to the vertical turbulent intensity, but their contributions to the heat flux can be up to 80%. The thermal internal boundary layer (TIBL) reduces the wind speed and forms the stable stratification, which produces the obvious change of turbulent momentum flux and heat flux over the heterogeneous surfaces. The increased downdrafts, which mainly occur over the lake patches, carry more warm, dry air down from the free atmosphere. The background wind inhibits the SCs and the development of the CBL; it also weakens the patch-induced turbulent intensity, heat flux, and convective intensity. © Author(s) 2021.
语种	英语
scopus关键词	boundary layer; heat flux; heterogeneous medium; kinetic energy; large eddy simulation; turbulence; China; Yellow River
来源期刊	ATMOSPHERIC CHEMISTRY AND PHYSICS
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/246474
作者单位	Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, College of Atmospheric Sciences, Lanzhou University, Lanzhou, 730000, China; Land-Atmosphere Interaction and Its Climatic Effects Group, State Key Laboratory of Tibetan Plateau Earth System, Resources and Environment (TPESRE), Institute of Tibetan Plateau Research, Chinese Academy of Sciences, Beijing, 100101, China; University of Chinese Academy of Sciences, Beijing, 100049, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Chinese Academy of Sciences, Beijing, 100101, China; Key Laboratory of Land Surface Process and Climate Change in Cold and Arid Regions, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou, 730000, China
推荐引用方式 GB/T 7714	Zhang Y.,Huang Q.,Ma Y.,et al. Large eddy simulation of boundary-layer turbulence over the heterogeneous surface in the source region of the Yellow River[J]. 中国科学院西北生态环境资源研究院,2021,21(20).
APA	Zhang Y..,Huang Q..,Ma Y..,Luo J..,Wang C..,...&Chou Y..(2021).Large eddy simulation of boundary-layer turbulence over the heterogeneous surface in the source region of the Yellow River.ATMOSPHERIC CHEMISTRY AND PHYSICS,21(20).
MLA	Zhang Y.,et al."Large eddy simulation of boundary-layer turbulence over the heterogeneous surface in the source region of the Yellow River".ATMOSPHERIC CHEMISTRY AND PHYSICS 21.20(2021).