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DOI	10.1088/1748-9326/abc64e
	Recent trends in gross primary production and their drivers: analysis and modelling at flux-site and global scales
	Cai, Wenjia; Prentice, Iain Colin
通讯作者	Cai, WJ
来源期刊	ENVIRONMENTAL RESEARCH LETTERS
ISSN	1748-9326
出版年	2020
卷号	15 期号:12
英文摘要	Gross primary production (GPP) by terrestrial ecosystems is the largest flux in the global carbon cycle, and its continuing increase in response to environmental changes is key to land ecosystems' capacity to offset anthropogenic CO2 emissions. However, the CO2- and climate-sensitivities of GPP vary among models. We applied the 'P model'-a parameter-sparse and extensively tested light use efficiency (LUE) model, driven by CO2, climate and remotely sensed greenness data-at 29 sites with multi-year eddy-covariance flux measurements. Observed (both positive and negative) GPP trends at these sites were predicted, albeit with some bias. Increasing LUE (due to rising atmospheric CO2 concentration) and green vegetation cover were the primary controls of modelled GPP trends across sites. Global GPP simulated by the same model increased by 0.46 +/- 0.09 Pg C yr(-2) during 1982-2016. This increase falls in the mid-range rate of simulated increase by the TRENDY v8 ensemble of state-of-the-art ecosystem models. The modelled LUE increase during 1900-2013 was 15%, similar to a published estimate based on deuterium isotopomers. Rising CO2 was the largest contributor to the modelled GPP increase. Greening, which may in part be caused by rising CO2, ranked second but dominated the modelled GPP change over large areas, including semi-arid vegetation on all continents. Warming caused a small net reduction in modelled global GPP, but dominated the modelled GPP increase in high northern latitudes. These findings strengthen the evidence that rising LUE due to rising CO2 level and increased green vegetation cover (fAPAR) are the main causes of increasing GPP, and thereby, the terrestrial carbon sink.
英文关键词	gross primary production climate change atmospheric CO2 concentration
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000598690400001
WOS关键词	USE EFFICIENCY MODEL ; LAND-USE ; ECOSYSTEM RESPIRATION ; CO2 FERTILIZATION ; CARBON-DIOXIDE ; CLIMATE ; ASSIMILATION ; TEMPERATURE ; IMPACTS ; PARAMETERS
WOS类目	Environmental Sciences ; Meteorology & Atmospheric Sciences
WOS研究方向	Environmental Sciences & Ecology ; Meteorology & Atmospheric Sciences
来源机构	清华大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/327897
作者单位	[Cai, Wenjia; Prentice, Iain Colin] Imperial Coll London, Dept Life Sci, Silwood Pk Campus,Buckhurst Rd, Ascot SL5 7PY, Berks, England; [Prentice, Iain Colin] Tsinghua Univ, Dept Earth Syst Sci, Minist Educ, Key Lab Earth Syst Modeling, Beijing 100084, Peoples R China; [Prentice, Iain Colin] Macquarie Univ, Dept Biol Sci, Sydney, NSW 2109, Australia
推荐引用方式 GB/T 7714	Cai, Wenjia,Prentice, Iain Colin. Recent trends in gross primary production and their drivers: analysis and modelling at flux-site and global scales[J]. 清华大学,2020,15(12).
APA	Cai, Wenjia,&Prentice, Iain Colin.(2020).Recent trends in gross primary production and their drivers: analysis and modelling at flux-site and global scales.ENVIRONMENTAL RESEARCH LETTERS,15(12).
MLA	Cai, Wenjia,et al."Recent trends in gross primary production and their drivers: analysis and modelling at flux-site and global scales".ENVIRONMENTAL RESEARCH LETTERS 15.12(2020).