Photosynthesis-transpiration coupling model at canopy scale in terrestrial ecosystem

CORC > 沈阳应用生态研究所 > 中国科学院沈阳应用生态研究所 > 沈阳应用生态研究所

	Photosynthesis-transpiration coupling model at canopy scale in terrestrial ecosystem
	Ren, CY; Yu, GR; Wang, QF; Guan, DX; Yu, GR, Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
刊名	SCIENCE IN CHINA SERIES D-EARTH SCIENCES
	2005
卷号	48 页码:160-171
关键词	Photosynthesis Rate Transpiration Rate Smpt-sb Model Internal Conductance Canopy Scale
ISSN号	1006-9313
英文摘要	At the hypothesis of big leaf, an ecosystem photosynthesis-transpiration coupling cycle model was established by the scaled SMPT-SB model from single leaf to canopy, and model parameterization methods were discussed. Through simulating the canopy light distribution, canopy internal conductance to CO2 can be scaled from single leaf to canopy by integrating to canopy using the relationship between single internal conductance and photosynthetic photon flux density. Using the data observed by eddy covariance method from the Changbai Mountains site of ChinaFLUX, the application of the model at the canopy scale was examined. Under no water stress, the simulated net ecosystem photosynthesis rate fitted with the observed data very well, the slope and R-2 of the line regression equation of the observed and simulated values were 0.7977 and 0.8892, respectively (n = 752), and average absolute error was 3.78 mu mol CO2 m(-2) s(-1); the slope, R-2 and average absolute error of transpiration rate were 0.7314, 0.4355 and 1.60 mmol H2O m(-2) s(-1), respectively (n = 752). The relationship between canopy photosynthesis, transpiration and external environmental conditions was discussed by treating the canopy as a whole and neglecting the comprehensive feedback mechanism within canopy, and it was noted that the precipitation course affected the transpiration rate simulation badly. Compared to the models based on eco-physiological processes, the SMPT-SB model was simple and easy to be used. And it can be used as a basic carbon and water coupling model of soil-plant-atmosphere continuum.
学科主题	Geosciences, Multidisciplinary
语种	英语
WOS记录号	WOS:000229942300016
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/55123]
专题	沈阳应用生态研究所_沈阳应用生态研究所
通讯作者	Yu, GR, Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
推荐引用方式 GB/T 7714	Ren, CY,Yu, GR,Wang, QF,et al. Photosynthesis-transpiration coupling model at canopy scale in terrestrial ecosystem[J]. SCIENCE IN CHINA SERIES D-EARTH SCIENCES,2005,48:160-171.
APA	Ren, CY,Yu, GR,Wang, QF,Guan, DX,&Yu, GR, Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China.(2005).Photosynthesis-transpiration coupling model at canopy scale in terrestrial ecosystem.SCIENCE IN CHINA SERIES D-EARTH SCIENCES,48,160-171.
MLA	Ren, CY,et al."Photosynthesis-transpiration coupling model at canopy scale in terrestrial ecosystem".SCIENCE IN CHINA SERIES D-EARTH SCIENCES 48(2005):160-171.