干旱区生态环境知识资源中心(Arid): Effect of Mesoscale Land Use Change on Characteristics of Convective Boundary Layer: Semi-Idealized Large Eddy Simulations over Northwest China

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	Effect of Mesoscale Land Use Change on Characteristics of Convective Boundary Layer: Semi-Idealized Large Eddy Simulations over Northwest China
	Cao Bangjun; Zhang Shuwen; Li Deqin; Li Yanlin; Zhou Linfan; Wang Jiemin
来源期刊	Journal of Meteorological Research
ISSN	2095-6037
出版年	2018
卷号	32 期号:3 页码:421-432
英文摘要	Although large-scale topography and land use have been properly considered in weather and climate models,the effect of mesoscale and microscale heterogeneous land use on convective boundary layer (CBL) has not been fully understood yet.In this study,the influence of semi-idealized strip-like patches of oases and deserts,which resemble irrigated land use in Northwest China,on the CBL characteristics,is investigated based on the Weather Research and Forecasting (WRF)-large eddy simulation (LES) driven by observed land surface data.The influences of soil water content in oases on aloft CBL flow structure,stability,turbulent kinetic energy (TKE),and vertical fluxes are carefully examined through a group of sensitivity experiments.The results show that secondary circulation (SC)/turbulent organized structures (TOS) is the strongest/weakest when soil water content in oases is close to saturation (e.g.,when the oases are irrigated).With the decrease of soil water content in oases (i.e.,after irrigation),SC (TOS) becomes weak (strong) in the lower and middle CBL,the flux induced by SC and TOS becomes small (large),which has a dramatic impact on point measurement of eddy covariance (EC) fluxes.The flux induced by SC and TOS has little influence on EC sensible heat flux,but great influence on EC latent heat flux.Under this circumstance,the area averaged heat flux cannot be represented by point measurement of flux by the EC method,especially just after irrigation in oases.Comparison of imbalance ratio (i.e.,contribution of SC and TOS to the total flux) reveals that increased soil moisture in oases leads to a larger imbalance ratio as well as enhanced surface heterogeneity.Moreover,we found that the soil layer configuration at different depths has a negligible impact on the CBL flux properties.
英文关键词	oasis and desert land surface heterogeneity large eddy simulation soil water content secondary circulation turbulent organized structure
类型	Article
语种	英语
开放获取类型	Other Gold
收录类别	CSCD
WOS研究方向	Meteorology & Atmospheric Sciences
CSCD记录号	CSCD:6277735
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/335972
作者单位	Cao Bangjun, School of Atmospheric Sciences,Chengdu University of Information Technology;;College of Atmospheric Sciences,Lanzhou University, ;;Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Chengdu;;Lanzhou, ;; 610225;;730000.; Zhang Shuwen, College of Atmospheric Sciences,Lanzhou University, Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Lanzhou, Gansu 730000, China.; Li Yanlin, College of Atmospheric Sciences,Lanzhou University, Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Lanzhou, Gansu 730000, China.; Zhou Linfan, College of Atmospheric Sciences,Lanzhou University, Key Laboratory for Semi-Arid Climate Change of the Ministry of Education, Lanzhou, Gansu 730000, China.; Li Deqin, Shenyang Central Meteorological Observatory, Shenyang, Liaoning 110016, China.; Wang Jiemin, Cold and Arid Regions Environmental and Engineering Research Institute,Chinese Academy of Sciences, Lanzhou, Gansu 730000, China.
推荐引用方式 GB/T 7714	Cao Bangjun,Zhang Shuwen,Li Deqin,et al. Effect of Mesoscale Land Use Change on Characteristics of Convective Boundary Layer: Semi-Idealized Large Eddy Simulations over Northwest China[J],2018,32(3):421-432.
APA	Cao Bangjun,Zhang Shuwen,Li Deqin,Li Yanlin,Zhou Linfan,&Wang Jiemin.(2018).Effect of Mesoscale Land Use Change on Characteristics of Convective Boundary Layer: Semi-Idealized Large Eddy Simulations over Northwest China.Journal of Meteorological Research,32(3),421-432.
MLA	Cao Bangjun,et al."Effect of Mesoscale Land Use Change on Characteristics of Convective Boundary Layer: Semi-Idealized Large Eddy Simulations over Northwest China".Journal of Meteorological Research 32.3(2018):421-432.