干旱区生态环境知识资源中心(Arid): A physiology-based Earth observation model indicates stagnation in the global gross primary production during recent decades

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DOI	10.1111/gcb.15424
	A physiology-based Earth observation model indicates stagnation in the global gross primary production during recent decades
	Tagesson, Torbern; Tian, Feng; Schurgers, Guy; Horion, Stephanie; Scholes, Robert; Ahlstrom, Anders; Ardo, Jonas; Moreno, Alvaro; Madani, Nima; Olin, Stefan; Fensholt, Rasmus
通讯作者	Tagesson, T
来源期刊	GLOBAL CHANGE BIOLOGY
ISSN	1354-1013
EISSN	1365-2486
英文摘要	Earth observation-based estimates of global gross primary production (GPP) are essential for understanding the response of the terrestrial biosphere to climatic change and other anthropogenic forcing. In this study, we attempt an ecosystem-level physiological approach of estimating GPP using an asymptotic light response function (LRF) between GPP and incoming photosynthetically active radiation (PAR) that better represents the response observed at high spatiotemporal resolutions than the conventional light use efficiency approach. Modelled GPP is thereafter constrained with meteorological and hydrological variables. The variability in field-observed GPP, net primary productivity and solar-induced fluorescence was better or equally well captured by our LRF-based GPP when compared with six state-of-the-art Earth observation-based GPP products. Over the period 1982-2015, the LRF-based average annual global terrestrial GPP budget was 121.8 +/- 3.5 Pg C, with a detrended inter-annual variability of 0.74 +/- 0.13 Pg C. The strongest inter-annual variability was observed in semi-arid regions, but croplands in China and India also showed strong inter-annual variations. The trend in global terrestrial GPP during 1982-2015 was 0.27 +/- 0.02 Pg C year(-1), and was generally larger in the northern than the southern hemisphere. Most positive GPP trends were seen in areas with croplands whereas negative trends were observed for large non-cropped parts of the tropics. Trends were strong during the eighties and nineties but levelled off around year 2000. Other GPP products either showed no trends or continuous increase throughout the study period. This study benchmarks a first global Earth observation-based model using an asymptotic light response function, improving simulations of GPP, and reveals a stagnation in the global GPP after the year 2000.
英文关键词	climate change Earth system GIMMS land‐ atmosphere interactions light use efficiency photosynthesis vegetation productivity
类型	Article ; Early Access
语种	英语
开放获取类型	Other Gold
收录类别	SCI-E
WOS记录号	WOS:000596081900001
WOS关键词	CARBON EXCHANGE FLUXES ; NET PRIMARY PRODUCTION ; CO2 EXCHANGE ; PHOTOSYNTHETIC CAPACITY ; ATMOSPHERIC CO2 ; USE-EFFICIENCY ; VEGETATION ; ECOSYSTEM ; SATELLITE ; DYNAMICS
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/328577
作者单位	[Tagesson, Torbern; Tian, Feng; Ahlstrom, Anders; Ardo, Jonas; Olin, Stefan] Lund Univ, Dept Phys Geog & Ecosyst Sci, Solvegatan 12, SE-22362 Lund, Sweden; [Tagesson, Torbern; Schurgers, Guy; Horion, Stephanie; Fensholt, Rasmus] Univ Copenhagen, Dept Geosci & Nat Resource Management, Copenhagen, Denmark; [Tian, Feng] Wuhan Univ, Sch Remote Sensing & Informat Engn, Wuhan, Peoples R China; [Scholes, Robert] Univ Witwatersrand, Global Change Inst, Johannesburg, South Africa; [Ahlstrom, Anders] Lund Univ, Ctr Middle Eastern Studies, Lund, Sweden; [Moreno, Alvaro] Univ Valencia, Image Proc Lab IPL, Valencia, Spain; [Moreno, Alvaro] Univ Montana, WA Franke Coll Forestry & Conservat, Numer Terradynam Simulat Grp, Missoula, MT 59812 USA; [Madani, Nima] Jet Prop Lab, Pasadena, CA USA
推荐引用方式 GB/T 7714	Tagesson, Torbern,Tian, Feng,Schurgers, Guy,et al. A physiology-based Earth observation model indicates stagnation in the global gross primary production during recent decades[J].
APA	Tagesson, Torbern.,Tian, Feng.,Schurgers, Guy.,Horion, Stephanie.,Scholes, Robert.,...&Fensholt, Rasmus.
MLA	Tagesson, Torbern,et al."A physiology-based Earth observation model indicates stagnation in the global gross primary production during recent decades".GLOBAL CHANGE BIOLOGY