Climate control on terrestrial biospheric carbon turnover

dc.contributor.author Eglinton, Timothy I.
dc.contributor.author Galy, Valier
dc.contributor.author Hemingway, Jordon D.
dc.contributor.author Feng, Xiaojuan
dc.contributor.author Bao, Hongyan
dc.contributor.author Blattmann, Thomas M.
dc.contributor.author Dickens, Angela F.
dc.contributor.author Gies, Hannah
dc.contributor.author Giosan, Liviu
dc.contributor.author Haghipour, Negar
dc.contributor.author Hou, Pengfei
dc.contributor.author Lupker, Maarten
dc.contributor.author McIntyre, Cameron P.
dc.contributor.author Montlucon, Daniel B.
dc.contributor.author Peucker-Ehrenbrink, Bernhard
dc.contributor.author Ponton, Camilo
dc.contributor.author Schefuß, Enno
dc.contributor.author Schwab, Melissa S.
dc.contributor.author Voss, Britta M.
dc.contributor.author Wacker, Lukas
dc.contributor.author Wu, Ying
dc.contributor.author Zhao, Meixun
dc.date.accessioned 2021-04-15T14:42:39Z
dc.date.available 2021-04-15T14:42:39Z
dc.date.issued 2021-02-23
dc.description © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in 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. Climate control on terrestrial biospheric carbon turnover. Proceedings of the National Academy of Sciences of the United States of America, 118(8), (2021): e2011585118, htps://doi.org/ 10.1073/pnas.2011585118. en_US
dc.description.abstract 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. en_US
dc.description.sponsorship This work was supported by grants from the US NSF (OCE-0928582 to T.I.E. and V.V.G.; OCE-0851015 to B.P.-E., T.I.E., and V.V.G.; and EAR-1226818 to B.P.-E.), Swiss National Science Foundation (200021_140850, 200020_163162, and 200020_184865 to T.I.E.), and National Natural Science Foundation of China (41520104009 to M.Z.). en_US
dc.identifier.citation 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. (2021). Climate control on terrestrial biospheric carbon turnover. Proceedings of the National Academy of Sciences of the United States of America, 118(8), e2011585118. en_US
dc.identifier.doi 10.1073/pnas.2011585118
dc.identifier.uri https://hdl.handle.net/1912/26952
dc.publisher National Academy of Sciences en_US
dc.relation.uri https://doi.org/10.1073/pnas.2011585118
dc.rights Attribution-NonCommercial-NoDerivatives 4.0 International *
dc.rights.uri http://creativecommons.org/licenses/by-nc-nd/4.0/ *
dc.subject Radiocarbon en_US
dc.subject Plant biomarkers en_US
dc.subject Carbon turnover times en_US
dc.subject Fluvial carbon en_US
dc.subject Carbon cycle en_US
dc.title Climate control on terrestrial biospheric carbon turnover en_US
dc.type Article en_US
dspace.entity.type Publication
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