Comparison of methods for estimating evapotranspiration rate of dry forest canopy: Eddy covariance, Bowen ratio energy balance, and Penman-Monteith equation

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	Comparison of methods for estimating evapotranspiration rate of dry forest canopy: Eddy covariance, Bowen ratio energy balance, and Penman-Monteith equation
	Shi, TT; Guan, DX; Wu, JB; Wang, AZ; Jin, CJ; Han, SJ; Shi, TT, Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China
刊名	JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
	2008
卷号	113 期号:D19 页码:-
ISSN号	0148-0227
英文摘要	A multiyear, multitechnique study was conducted to estimate latent heat flux within a temperate mixed forest of broad-leaved and coniferous trees of Changbai Mountains in northeastern China. Three different methods were used, including eddy covariance (EC), Bowen ratio energy balance ( BREB), and Penman-Monteith ( PM), during the growing seasons ( May to September) of 2003-2005. BREB- and PM-based latent heat fluxes calculated with micrometeorological variables of different reference levels were analyzed and those of the topmost reference level were the most similar to the EC measurements. The latent heat fluxes ( LE) estimated with the three methods showed similar diurnal and seasonal courses. The maximum of monthly averaged daily LE appeared in July and August. Although the three methods gave the roughly consistent result, dispersion among them still existed in the experiment. PM method usually gave the highest latent heat flux among the three methods. Sum of the half-hourly values from BREB and PM methods of the three growing seasons took 81.2% and 131% of that from EC measurement. The discrepancy between BREB estimates, as well as PM estimates, and EC measurements was analyzed with regard to vapor pressure deficit. Several reasons leading to the uncertainty of BREB and PM methods were discussed, including the assumptions in the two methods, source area and the influence of environmental factors.
学科主题	Meteorology & Atmospheric Sciences
语种	英语
WOS记录号	WOS:000260178000005
资助机构	National Natural Science Foundation of China [40675069, 30771711, 30700085, 30500078]; IAE Innovation Program [SLYQY0609]
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54339]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Shi, TT, Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Shi, TT,Guan, DX,Wu, JB,et al. Comparison of methods for estimating evapotranspiration rate of dry forest canopy: Eddy covariance, Bowen ratio energy balance, and Penman-Monteith equation[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2008,113(D19):-.
APA	Shi, TT.,Guan, DX.,Wu, JB.,Wang, AZ.,Jin, CJ.,...&Shi, TT, Grad Univ Chinese Acad Sci, Beijing 100049, Peoples R China.(2008).Comparison of methods for estimating evapotranspiration rate of dry forest canopy: Eddy covariance, Bowen ratio energy balance, and Penman-Monteith equation.JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,113(D19),-.
MLA	Shi, TT,et al."Comparison of methods for estimating evapotranspiration rate of dry forest canopy: Eddy covariance, Bowen ratio energy balance, and Penman-Monteith equation".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 113.D19(2008):-.