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Derivation of temporally continuous leaf maximum carboxylation rate (Vcmax) 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
Corresponding AuthorAinong Li
2018
Source PublicationAgricultural and Forest Meteorology
ISSN0168-1923
Volume259Issue:0Pages:82-94
Abstract

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 Vcmax was validated through the correlation analysis between the normalized difference vegetation index (NDVI) and Vcmax. To illustrate the advantages of the proposed scheme in our study, BEPS simulated GPP using the derived Vcmax from sunlit GPP in our study, the derived Vcmax from canopy GPP and the reference Vcmax 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 Vcmax. The Vcmax obtained in our study was significantly correlated with NDVI (R2 = 0.77); (2) the seasonal variations in Vcmax could significantly improve the accuracy of photosynthesis simulation. The GPP difference between eddy covariance GPP and BEPS simulated GPP using derived Vcmax from sunlit GPP (mean = 0.12, std = 0.92) were significantly smaller than those between eddy covariance GPP and BEPS simulated GPP using reference Vcmax as constants (mean = 1.37, std = 1.37); (3) the sunlit GPP is able to obtain the relatively accurate Vcmax that can improve the simulation of photosynthesis. GPP difference between eddy covariance GPP and BEPS simulated GPP using derived Vcmax 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 Vcmax 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 Vcmax, and the assimilation scheme gives new potential to improve the simulation of photosynthesis through terrestrial biosphere models.

KeywordLeaf Maximum Carboxylation Rate (Vcmax) Gross Photosynthesis Productivity (Gpp) Boreal Ecosystem Productivity Simulator (Beps) Light Response Curve
Indexed BySCI
Language英语
Document Type期刊论文
Identifierhttp://ir.imde.ac.cn/handle/131551/21455
Collection数字山地与遥感应用中心
Corresponding AuthorAinong Li
Affiliation1.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
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Corresponding Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
Xinyao Xie,Ainong Li,Huaan Jin,et al. Derivation of temporally continuous leaf maximum carboxylation rate (Vcmax) 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(0):82-94.
APA Xinyao Xie,Ainong Li,Huaan Jin,Gaofei Yin,&Xi Nan.(2018).Derivation of temporally continuous leaf maximum carboxylation rate (Vcmax) from the sunlit leaf gross photosynthesis productivity through combining BEPS model with light response curve at tower flux sites.Agricultural and Forest Meteorology,259(0),82-94.
MLA Xinyao Xie,et al."Derivation of temporally continuous leaf maximum carboxylation rate (Vcmax) from the sunlit leaf gross photosynthesis productivity through combining BEPS model with light response curve at tower flux sites".Agricultural and Forest Meteorology 259.0(2018):82-94.
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