气候变化领域集成服务门户(CCPortal): Global vegetation biomass production efficiency constrained by models and observations

CCPortal

DOI	10.1111/gcb.14816
	Global vegetation biomass production efficiency constrained by models and observations
	He, Yue; Peng, Shushi; Liu, Yongwen; Li, Xiangyi; Wang, Kai; Ciais, Philippe; Arain, M. Altaf; Fang, Yuanyuan; Fisher, Joshua B.; Goll, Daniel; Hayes, Daniel; Huntzinger, Deborah N.; Ito, Akihiko; Jain, Atul K.; Janssens, Ivan A.; Mao, Jiafu; Campioli, Matteo; Michalak, Anna M.; Peng, Changhui; Penuelas, Josep; Poulter, Benjamin; Qin, Dahe; Ricciuto, Daniel M.; Schaefer, Kevin; Schwalm, Christopher R.; Shi, Xiaoying; Tian, Hanqin; Vicca, Sara; Wei, Yaxing; Zeng, Ning; Zhu, Qiuan
发表日期	2020
ISSN	1354-1013
起始页码	1474
结束页码	1484
卷号	26 期号:3
英文摘要	Plants use only a fraction of their photosynthetically derived carbon for biomass production (BP). The biomass production efficiency (BPE), defined as the ratio of BP to photosynthesis, and its variation across and within vegetation types is poorly understood, which hinders our capacity to accurately estimate carbon turnover times and carbon sinks. Here, we present a new global estimation of BPE obtained by combining field measurements from 113 sites with 14 carbon cycle models. Our best estimate of global BPE is 0.41 +/- 0.05, excluding cropland. The largest BPE is found in boreal forests (0.48 +/- 0.06) and the lowest in tropical forests (0.40 +/- 0.04). Carbon cycle models overestimate BPE, although models with carbon-nitrogen interactions tend to be more realistic. Using observation-based estimates of global photosynthesis, we quantify the global BP of non-cropland ecosystems of 41 +/- 6 Pg C/year. This flux is less than net primary production as it does not contain carbon allocated to symbionts, used for exudates or volatile carbon compound emissions to the atmosphere. Our study reveals a positive bias of 24 +/- 11% in the model-estimated BP (10 of 14 models). When correcting models for this bias while leaving modeled carbon turnover times unchanged, we found that the global ecosystem carbon storage change during the last century is decreased by 67% (or 58 Pg C).
英文关键词	biomass production; BPE; carbon sink; emergent constraint; terrestrial biosphere model
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
来源期刊	GLOBAL CHANGE BIOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/158799
作者单位	Peng, SS (corresponding author), Peking Univ, Coll Urban & Environm Sci, Sino French Inst Earth Syst Sci, Beijing 100871, Peoples R China.
推荐引用方式 GB/T 7714	He, Yue,Peng, Shushi,Liu, Yongwen,et al. Global vegetation biomass production efficiency constrained by models and observations[J],2020,26(3).
APA	He, Yue.,Peng, Shushi.,Liu, Yongwen.,Li, Xiangyi.,Wang, Kai.,...&Zhu, Qiuan.(2020).Global vegetation biomass production efficiency constrained by models and observations.GLOBAL CHANGE BIOLOGY,26(3).
MLA	He, Yue,et al."Global vegetation biomass production efficiency constrained by models and observations".GLOBAL CHANGE BIOLOGY 26.3(2020).