气候变化领域集成服务门户(CCPortal): Climate control on terrestrial biospheric carbon turnover

CCPortal

DOI	10.1073/pnas.2011585118
	Climate control on terrestrial biospheric carbon turnover
	Eglinton T.I.; Galy V.V.; Hemingway J.D.; Feng X.; Bao H.; Blattmann T.M.; Dickens A.F.; Gies H.; Giosan L.; Haghipour N.; Hou P.; Lupker M.; McIntyre C.P.; Montluçon D.B.; Peucker-Ehrenbrink B.; Ponton C.; Schefuß E.; Schwab M.S.; Voss B.M.; Wacker L.; Wu Y.; Zhao M.
发表日期	2021
ISSN	00278424
卷号	118 期号:8
英文摘要	Terrestrial vegetation and soils hold three times more carbon than the atmosphere. Much debate concerns how anthropogenic activity will perturb these surface reservoirs, potentially exacerbating ongoing changes to the climate system. Uncertainties specifically persist in extrapolating point-source observations to ecosystem-scale budgets and fluxes, which require consideration of vertical and lateral processes on multiple temporal and spatial scales. To explore controls on organic carbon (OC) turnover at the river basin scale, we present radiocarbon (14C) ages on two groups of molecular tracers of plant-derived carbon—leaf-wax lipids and lignin phenols—from a globally distributed suite of rivers. We find significant negative relationships between the 14C age of these biomarkers and mean annual temperature and precipitation. Moreover, riverine biospheric-carbon ages scale proportionally with basin-wide soil carbon turnover times and soil 14C ages, implicating OC cycling within soils as a primary control on exported biomarker ages and revealing a broad distribution of soil OC reactivities. The ubiquitous occurrence of a long-lived soil OC pool suggests soil OC is globally vulnerable to perturbations by future temperature and precipitation increase. Scaling of riverine biospheric-carbon ages with soil OC turnover shows the former can constrain the sensitivity of carbon dynamics to environmental controls on broad spatial scales. Extracting this information from fluvially dominated sedimentary sequences may inform past variations in soil OC turnover in response to anthropogenic and/or climate perturbations. In turn, monitoring riverine OC composition may help detect future climate-change–induced perturbations of soil OC turnover and stocks. © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Carbon cycle; Carbon turnover times; Fluvial carbon; Plant biomarkers; Radiocarbon
语种	英语
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180548
作者单位	Department of Earth Sciences, ETH Zurich8092, Switzerland; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138, United States; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing, 100093, China; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai, 200062, China; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543, United States; Laboratory for Ion Beam Physics, Department of Physics, ETH Zurich, Zurich, 8093, Switzerland; Frontiers Science Center for Deep Ocean Multispheres and Earth System, Key Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University China, Qingdao, 266100, China; Center for Marine Environmental Sciences, University of Bremen, Bremen, 28359, G...
推荐引用方式 GB/T 7714	Eglinton T.I.,Galy V.V.,Hemingway J.D.,et al. Climate control on terrestrial biospheric carbon turnover[J],2021,118(8).
APA	Eglinton T.I..,Galy V.V..,Hemingway J.D..,Feng X..,Bao H..,...&Zhao M..(2021).Climate control on terrestrial biospheric carbon turnover.Proceedings of the National Academy of Sciences of the United States of America,118(8).
MLA	Eglinton T.I.,et al."Climate control on terrestrial biospheric carbon turnover".Proceedings of the National Academy of Sciences of the United States of America 118.8(2021).