气候变化领域集成服务门户(CCPortal): Radiocarbon constraints imply reduced carbon uptake by soils during the 21st century

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DOI	10.1126/science.aad4273
	Radiocarbon constraints imply reduced carbon uptake by soils during the 21st century
	He Y.; Trumbore S.E.; Torn M.S.; Harden J.W.; Vaughn L.J.S.; Allison S.D.; Randerson J.T.
发表日期	2016
ISSN	0036-8075
起始页码	1419
结束页码	1424
卷号	353 期号:6306
英文摘要	Soil is the largest terrestrial carbon reservoir and may influence the sign and magnitude of carbon cycle-climate feedbacks. Many Earth system models (ESMs) estimate a significant soil carbon sink by 2100, yet the underlying carbon dynamics determining this response have not been systematically tested against observations.We used 14C data from157 globally distributed soil profiles sampled to 1-meter depth to show that ESMs underestimated the mean age of soil carbon by a factor of more than six (430 ± 50 years versus 3100 ± 1800 years). Consequently, ESMs overestimated the arbon sequestration potential of soils by a factor of nearly two (40 ± 27%).These inconsistencies suggest that ESMs must better represent carbon stabilization processes and the turnover time of slow and passive reservoirs when simulating future atmospheric carbon dioxide dynamics.
英文关键词	carbon 14; carbon dioxide; biogeochemical cycle; carbon dioxide; carbon sequestration; carbon sink; climate feedback; climate modeling; observational method; soil carbon; twenty first century; Article; carbon sequestration; carbon sink; climate change; negative feedback; priority journal; radiative forcing; sampling; soil; turnover time
语种	英语
来源期刊	Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/243984
作者单位	Department of Earth System Science, University of California, Irvine, CA, United States; Department of Biogeochemical Processes, Max-Planck-Institute for Biogeochemistry, Jena, Germany; Earth Sciences Division, Lawrence Berkeley National Laboratory, Berkeley, CA, United States; U.S. Geological Survey, Menlo Park, CA, United States; Stanford University, Stanford, CA, United States; Department of Ecology and Evolutionary Biology, University of California Irvine, Irvine, CA, United States
推荐引用方式 GB/T 7714	He Y.,Trumbore S.E.,Torn M.S.,et al. Radiocarbon constraints imply reduced carbon uptake by soils during the 21st century[J],2016,353(6306).
APA	He Y..,Trumbore S.E..,Torn M.S..,Harden J.W..,Vaughn L.J.S..,...&Randerson J.T..(2016).Radiocarbon constraints imply reduced carbon uptake by soils during the 21st century.Science,353(6306).
MLA	He Y.,et al."Radiocarbon constraints imply reduced carbon uptake by soils during the 21st century".Science 353.6306(2016).