Surface roughness length dynamic over several different surfaces and its effects on modeling fluxes

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	Surface roughness length dynamic over several different surfaces and its effects on modeling fluxes
	Zhou, YL ; Sun, XM ; Zhu, ZL ; Zhang, RH ; Tian, J ; Liu, YF ; Guan, DX ; Yuan, GF
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2006
卷号	49 页码:262-272
关键词	ChinaFLUX surface roughness length dynamic spatial heterogeneity Yucheng Experimental
ISSN号	1006-9313
通讯作者	Sun, XM, Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observ & Modeling, Beijing 100101, Peoples R China
中文摘要	Roughness length and zero-plane displacement over three typical surfaces were calculated iteratively by least-square method, which are Yucheng Experimental Station for agriculture surfaces, Qianyanzhou Experimental Station for complex and undulant surfaces, and Changbai Mountains Experimental Station for forest surfaces. On the basis of roughness length dynamic, the effects of roughness length dynamic on fluxes were analyzed with SEBS model. The results indicate that, aerodynamic roughness length changes with vegetation conditions (such as vegetation height, LAI), wind speed, friction velocity and some other factors. In Yucheng and Changbai Mountains Experimental Station, aerodynamic roughness length over the fetch of flux tower changes with vegetation height and LAI obviously, that is, with the increase of LAI, roughness length increases to the peak value firstly, and then decreases. In Qianyanzhou Experimental Station, LAI changes slightly, so the relationship between roughness length and LAI is not obvious. The aerodynamic roughness length of Yucheng and Changbai Mountains Experimental Station changes slightly with wind direction, while aerodynamic roughness length of Qianyanzhou Experimental Station changes obviously with wind direction. The reason for that is the terrain in Yucheng and Changbai Mountains Experimental Station is relatively flat, while in Qianyanzhou Experimental Station the terrain is very undulant and heterogeneous. With the increase of wind speed, aerodynamic roughness length of Yucheng Experimental Station changes slightly, while it decreases obviously in Qianyanzhou Experimental Station and Changbai Mountains Experimental Station. Roughness length dynamic takes great effects on fluxes calculation, and the effects are analyzed by SEBS model. By comparing 1 day averaged roughness length in Yucheng Experimental Station and 5 day averaged roughness length of Qianyanzhou and Changbai Mountains Experimental Station with roughness length parameter chosen by the model, the effects of roughness length dynamic on flux calculation is analyzed. The maximum effect of roughness length dynamic on sensible heat flux is 2.726%, 33.802% and 18.105%, in Yucheng, Qianyanzhou, and Changbai Mountains experimental stations, respectively.
学科主题	Geosciences, Multidisciplinary
收录类别	SCI
语种	英语
WOS记录号	WOS:000242721500023
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54803]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Zhou, YL,Sun, XM,Zhu, ZL,et al. Surface roughness length dynamic over several different surfaces and its effects on modeling fluxes[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2006,49:262-272.
APA	Zhou, YL.,Sun, XM.,Zhu, ZL.,Zhang, RH.,Tian, J.,...&Yuan, GF.(2006).Surface roughness length dynamic over several different surfaces and its effects on modeling fluxes.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,49,262-272.
MLA	Zhou, YL,et al."Surface roughness length dynamic over several different surfaces and its effects on modeling fluxes".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 49(2006):262-272.