气候变化领域集成服务门户(CCPortal): Data-driven estimates of global litter production imply slower vegetation carbon turnover

CCPortal

DOI	10.1111/gcb.15515
	Data-driven estimates of global litter production imply slower vegetation carbon turnover
	He, Yue; Wang, Xuhui; Wang, Kai; Tang, Shuchang; Xu, Hao; Chen, Anping; Ciais, Philippe; Li, Xiangyi; Penuelas, Josep; Piao, Shilong
通讯作者	Wang, XH (通讯作者)
发表日期	2021
ISSN	1354-1013
EISSN	1365-2486
起始页码	1678
结束页码	1688
卷号	27 期号:8
英文摘要	Accurate quantification of vegetation carbon turnover time (tau(veg)) is critical for reducing uncertainties in terrestrial vegetation response to future climate change. However, in the absence of global information of litter production, tau(veg) could only be estimated based on net primary productivity under the steady-state assumption. Here, we applied a machine-learning approach to derive a global dataset of litter production by linking 2401 field observations and global environmental drivers. Results suggested that the observation-based estimate of global natural ecosystem litter production was 44.3 +/- 0.4 Pg C year(-1). By contrast, land-surface models (LSMs) overestimated the global litter production by about 27%. With this new global litter production dataset, we estimated global tau(veg) (mean value 10.3 +/- 1.4 years) and its spatial distribution. Compared to our observation-based tau(veg), modelled tau(veg) tended to underestimate tau(veg) at high latitudes. Our empirically derived gridded datasets of litter production and tau(veg) will help constrain global vegetation models and improve the prediction of global carbon cycle.
英文关键词	boosted regression trees; land-surface models; litter production; vegetation carbon stock; vegetation carbon turnover time
语种	英语
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
WOS类目	Biodiversity Conservation ; Ecology ; Environmental Sciences
WOS记录号	WOS:000613399700001
来源期刊	GLOBAL CHANGE BIOLOGY
来源机构	中国科学院青藏高原研究所
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/260530
推荐引用方式 GB/T 7714	He, Yue,Wang, Xuhui,Wang, Kai,et al. Data-driven estimates of global litter production imply slower vegetation carbon turnover[J]. 中国科学院青藏高原研究所,2021,27(8).
APA	He, Yue.,Wang, Xuhui.,Wang, Kai.,Tang, Shuchang.,Xu, Hao.,...&Piao, Shilong.(2021).Data-driven estimates of global litter production imply slower vegetation carbon turnover.GLOBAL CHANGE BIOLOGY,27(8).
MLA	He, Yue,et al."Data-driven estimates of global litter production imply slower vegetation carbon turnover".GLOBAL CHANGE BIOLOGY 27.8(2021).