气候变化领域集成服务门户(CCPortal): Reduction of structural impacts and distinction of photosynthetic pathways in a global estimation of GPP from space-borne solar-induced chlorophyll fluorescence

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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 Z.; Zhang Y.; Porcar-Castell A.; Joiner J.; Guanter L.; Yang X.; Migliavacca M.; Ju W.; Sun Z.; Chen S.; Martini D.; Zhang Q.; Li Z.; Cleverly J.; Wang H.; Goulas Y.
发表日期	2020
ISSN	00344257
卷号	240
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 (C3 or C4). 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 C3 and one for C4 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. © 2020 Elsevier Inc.
英文关键词	Canopy structure; Chlorophyll fluorescence; Photosynthesis; Photosynthetic pathway; Spectral invariant theory
语种	英语
scopus关键词	Chlorophyll; Fluorescence; Photosynthesis; Remote sensing; Canopy structure; Chlorophyll fluorescence; Gross primary production; Photosynthetic activity; Photosynthetic pathways; Physiological trait; Process oriented models; Spectral invariants; Satellites; chlorophyll; fluorescence; net primary production; OCO; remote sensing; satellite data; solar radiation
来源期刊	Remote Sensing of Environment
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/179393
作者单位	International Institute for Earth System Sciences, Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Nanjing University, Nanjing, China; Jiangsu Provincial Key Laboratory of Geographic Information Science and Technology, Key Laboratory for Land Satellite Remote Sensing Applications of Ministry of Natural Resources, School of Geography and Ocean Science, Nanjing University, Nanjing, Jiangsu 210023, China; Collaborative Innovation Center of Novel Software Technology and Industrialization, Nanjing, 210023, China; Optics of Photosynthesis Laboratory, Institute for Atmospheric and Earth System Research/Forest Sciences, University of Helsinki, Helsinki, Finland; National Aeronautics and Space Administration (NASA) Goddard Space Flight Center, Greenbelt, MD, United States; Centro de Tecnologías Físicas, Universitat Politècnica de València, Camí de Vera s/n, València, 46022, Spain; Department of Environmental Sciences, University of Virginia, Charlottesville, VA 22904, United S...
推荐引用方式 GB/T 7714	Zhang Z.,Zhang Y.,Porcar-Castell A.,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],2020,240.
APA	Zhang Z..,Zhang Y..,Porcar-Castell A..,Joiner J..,Guanter L..,...&Goulas Y..(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.
MLA	Zhang Z.,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).