Reduction of structural impacts and distinction of photosynthetic pathways in a global estimation of GPP from space-borne solar-induced chlorophyll fluorescence

doi:10.1016/j.rse.2020.111722

	Reduction of structural impacts and distinction of photosynthetic pathways in a global estimation of GPP from space-borne solar-induced chlorophyll fluorescence
	Zhang, Zhaoying 2,3; Zhang, Yongguang 2,3,4; Porcar-Castell, Albert 5; Joiner, Joanna 1; Guanter, Luis 6; Yang, Xi 7; Migliavacca, Mirco 8; Ju, Weimin 2,3,4; Sun, Zhigang 9,10; Chen, Shiping 11
刊名	REMOTE SENSING OF ENVIRONMENT
	2020-04-01
卷号	240 页码:17
关键词	Photosynthesis Photosynthetic pathway Chlorophyll fluorescence Canopy structure Spectral invariant theory
ISSN号	0034-4257
DOI	10.1016/j.rse.2020.111722
通讯作者	Zhang, Yongguang(yongguang_zhang@nju.edu.cn)
英文摘要	Quantifying global photosynthesis remains a challenge due to a lack of accurate remote sensing proxies. Solar-induced chlorophyll fluorescence (SIF) has been shown to be a good indicator of photosynthetic activity across various spatial scales. However, a global and spatially challenging estimate of terrestrial gross primary production (GPP) based on satellite SIF remains unresolved due to the confounding effects of species-specific physical and physiological traits and external factors, such as canopy structure or photosynthetic pathway (C-3 or C-4). Here we analyze an ensemble of far-red SIF data from OCO-2 satellite and ground observations at multiple sites, using the spectral invariant theory to reduce the effects of canopy structure and to retrieve a structure-corrected total canopy SIF emission (SIFtotal). We find that the relationships between observed canopy-leaving SIF and ecosystem GPP vary significantly among biomes. In contrast, the relationships between SIFtotal and GPP converge around two unique models, one for C-3 and one for C-4 plants. We show that the two single empirical models can be used to globally scale satellite SIF observations to terrestrial GPP. We obtain an independent estimate of global terrestrial GPP of 129.56 +/- 6.54 PgC/year for the 2015-2017 period, which is consistent with the state-of-the-art data- and process-oriented models. The new GPP product shows improved sensitivity to previously undetected 'hotspots' of productivity, being able to resolve the double-peak in GPP due to rotational cropping systems. We suggest that the direct scheme to estimate GPP presented here, which is based on satellite SIF, may open up new possibilities to resolve the dynamics of global terrestrial GPP across space and time.
资助项目	National Key Research and Development Program of China[2019YFA0606601] ; NSFC[41761134082] ; DFG[41761134082] ; General Program of National Science Foundation of China[41671421] ; Academy of Finland[288039] ; European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant[721995] ; Alexander von Humboldt foundation through the Max Planck Research Prize ; NASA through the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program ; Innovative and Practical Program of Graduate Student in Jiangsu Province[SJKY190037] ; CDIAC ; ICOS Ecosystem Thematic Center ; OzFlux office ; ChinaFlux office ; AsiaFlux office ; USDA ARS ; NSF[EAR 1331872]
WOS关键词	SUN-INDUCED FLUORESCENCE ; GROSS PRIMARY PRODUCTION ; NET ECOSYSTEM EXCHANGE ; CARBON-DIOXIDE ; CANOPY PHOTOSYNTHESIS ; PRIMARY PRODUCTIVITY ; FEEDBACK MECHANISM ; ENERGY FLUXES ; CO2 UPTAKE ; MODEL
WOS研究方向	Environmental Sciences & Ecology ; Remote Sensing ; Imaging Science & Photographic Technology
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000523955300033
资助机构	National Key Research and Development Program of China ; NSFC ; DFG ; General Program of National Science Foundation of China ; Academy of Finland ; European Union's Horizon 2020 research and innovation programme under the Marie Sklodowska-Curie grant ; Alexander von Humboldt foundation through the Max Planck Research Prize ; NASA through the Making Earth System Data Records for Use in Research Environments (MEaSUREs) Program ; Innovative and Practical Program of Graduate Student in Jiangsu Province ; CDIAC ; ICOS Ecosystem Thematic Center ; OzFlux office ; ChinaFlux office ; AsiaFlux office ; USDA ARS ; NSF
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/133879]
专题	中国科学院地理科学与资源研究所
通讯作者	Zhang, Yongguang
作者单位	1.NASA, Goddard Space Flight Ctr, Greenbelt, MD USA 2.Nanjing Univ, Int Inst Earth Syst Sci, Jiangsu Prov Key Lab Geog Informat Sci & Technol, Nanjing, Peoples R China 3.Nanjing Univ, Sch Geog & Ocean Sci, Jiangsu Prov Key Lab Geog Informat Sci & Technol, Key Lab Land Satellite Remote Sensing Applicat,Mi, Nanjing 210023, Jiangsu, Peoples R China 4.Collaborat Innovat Ctr Novel Software Technol & I, Nanjing 210023, Peoples R China 5.Univ Helsinki, Inst Atmospher & Earth Syst Res Forest Sci, Opt Photosynth Lab, Helsinki, Finland 6.Univ Politecn Valencia, Ctr Tecnol Fis, Cami Vera S-N, E-46022 Valencia, Spain 7.Univ Virginia, Dept Environm Sci, Charlottesville, VA 22904 USA 8.Max Planck Inst Biogeochem, Hans Knoell Str 10, D-07745 Jena, Germany 9.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China 10.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100190, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Zhaoying,Zhang, Yongguang,Porcar-Castell, Albert,et al. Reduction of structural impacts and distinction of photosynthetic pathways in a global estimation of GPP from space-borne solar-induced chlorophyll fluorescence[J]. REMOTE SENSING OF ENVIRONMENT,2020,240:17.
APA	Zhang, Zhaoying.,Zhang, Yongguang.,Porcar-Castell, Albert.,Joiner, Joanna.,Guanter, Luis.,...&Goulas, Yves.(2020).Reduction of structural impacts and distinction of photosynthetic pathways in a global estimation of GPP from space-borne solar-induced chlorophyll fluorescence.REMOTE SENSING OF ENVIRONMENT,240,17.
MLA	Zhang, Zhaoying,et al."Reduction of structural impacts and distinction of photosynthetic pathways in a global estimation of GPP from space-borne solar-induced chlorophyll fluorescence".REMOTE SENSING OF ENVIRONMENT 240(2020):17.