Derivation of temporally continuous leaf maximum carboxylation rate (V-cmax) from the sunlit leaf gross photosynthesis productivity through combining BEPS model with light response curve at tower flux sites

doi:10.1016/j.agrformet.2018.04.017

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > 山地表生过程与生态调控重点实验室

	Derivation of temporally continuous leaf maximum carboxylation rate (V-cmax) from the sunlit leaf gross photosynthesis productivity through combining BEPS model with light response curve at tower flux sites
	Xinyao Xie1,2 ; Ainong Li1 ; Huaan Jin1 ; Gaofei Yin1 ; Xi Nan1,3
刊名	AGRICULTURAL AND FOREST METEOROLOGY
	2018
卷号	259 页码:82-94
关键词	Leaf maximum carboxylation rate (Vcmax) Gross photosynthesis productivity (GPP) Boreal Ecosystem Productivity Simulator (BEPS) Light response curve
ISSN号	0168-1923
DOI	10.1016/j.agrformet.2018.04.017
通讯作者	Ainong Li
产权排序	1
英文摘要	Photosynthesis plays an important role in terrestrial carbon cycle, and simulation of photosynthesis through terrestrial biosphere models usually requires a specification of maximum carboxylation rate (V-cmax). However, estimating V-cmax by gas-exchange experiments is laborious and tedious, resulting in a general paucity of V-cmax data. In this study, a reliable assimilation scheme to derive temporally continuous V-cmax from measured sunlit gross photosynthesis productivity (GPP) was proposed and validated at three Canadian tower flux sites. To fulfill this purpose, the Boreal Ecosystem Productivity Simulator (BEPS) and light response curve were combined to separate the eddy covariance GPP data into sunlit GPP and shaded GPP, due to the lack of measured sunlit GPP. The reliability of V-cmax was validated through the correlation analysis between the normalized difference vegetation index (NDVI) and V-cmax. To illustrate the advantages of the proposed scheme in our study, BEPS simulated GPP using the derived from sunlit GPP in our study, the derived V-cmax from canopy GPP and the reference V-cmax as constants were respectively compared with corresponding eddy covariance GPP measurements. Results showed that (1) the proposed assimilation scheme based on sunlit GPP can be used to derive reliable temporally continuous V-cmax. The V-cmax obtained in our study was significantly correlated with NDVI (R-2 = 0.77); (2) the seasonal variations in V-cmax could significantly improve the accuracy of photosynthesis simulation. The GPP difference between eddy covariance GPP and BEPS simulated GPP using derived V-cmax from sunlit GPP (mean = 0.12, std = 0.92) were significantly smaller than those between eddy covariance GPP and BEPS simulated GPP using reference V-cmax as constants (mean = 1.37, std = 1.37); (3) the sunlit GPP is able to obtain the relatively accurate V-cmax that can improve the simulation of photosynthesis. GPP difference between eddy covariance GPP and BEPS simulated GPP using derived from sunlit GPP (mean = 0.12, std = 0.92) showed lower mean values and standard deviations than those between eddy covariance GPP and BEPS simulated GPP using derived V-cmax from canopy GPP (mean = 0.67, std = 1.00). Our study illustrated the reliability that sunlit GPP can be used to derive relatively accurate temporally continuous V-cmax, and the assimilation scheme gives new potential to improve the simulation of photosynthesis through terrestrial biosphere models.
电子版国际标准刊号	1873-2240
语种	英语
WOS记录号	WOS:000437064400008
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/23420]
专题	成都山地灾害与环境研究所_山地表生过程与生态调控重点实验室成都山地灾害与环境研究所_数字山地与遥感应用中心
作者单位	1.Research Center for Digital Mountain and Remote Sensing Application, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China; 2.University of Chinese Academy of Sciences, Beijing 100049, China; 3.College of Earth Sciences, Chengdu University of Technology, Chengdu 610059, China
推荐引用方式 GB/T 7714	Xinyao Xie,Ainong Li,Huaan Jin,et al. Derivation of temporally continuous leaf maximum carboxylation rate (V-cmax) from the sunlit leaf gross photosynthesis productivity through combining BEPS model with light response curve at tower flux sites[J]. AGRICULTURAL AND FOREST METEOROLOGY,2018,259:82-94.
APA	Xinyao Xie,Ainong Li,Huaan Jin,Gaofei Yin,&Xi Nan.(2018).Derivation of temporally continuous leaf maximum carboxylation rate (V-cmax) from the sunlit leaf gross photosynthesis productivity through combining BEPS model with light response curve at tower flux sites.AGRICULTURAL AND FOREST METEOROLOGY,259,82-94.
MLA	Xinyao Xie,et al."Derivation of temporally continuous leaf maximum carboxylation rate (V-cmax) from the sunlit leaf gross photosynthesis productivity through combining BEPS model with light response curve at tower flux sites".AGRICULTURAL AND FOREST METEOROLOGY 259(2018):82-94.