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Climate control on terrestrial biospheric carbon turnover.
Eglinton, Timothy I; Galy, Valier V; Hemingway, Jordon D; Feng, Xiaojuan; Bao, Hongyan; Blattmann, Thomas M; Dickens, Angela F; Gies, Hannah; Giosan, Liviu; Haghipour, Negar; Hou, Pengfei; Lupker, Maarten; McIntyre, Cameron P; Montluçon, Daniel B; Peucker-Ehrenbrink, Bernhard; Ponton, Camilo; Schefuß, Enno; Schwab, Melissa S; Voss, Britta M; Wacker, Lukas; Wu, Ying; Zhao, Meixun.
Afiliación
  • Eglinton TI; Department of Earth Sciences, ETH Zurich, 8092, Switzerland; timothy.eglinton@erdw.ethz.ch vgaly@whoi.edu.
  • Galy VV; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543.
  • Hemingway JD; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543; timothy.eglinton@erdw.ethz.ch vgaly@whoi.edu.
  • Feng X; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543.
  • Bao H; Department of Earth and Planetary Sciences, Harvard University, Cambridge, MA 02138.
  • Blattmann TM; Department of Earth Sciences, ETH Zurich, 8092, Switzerland.
  • Dickens AF; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543.
  • Gies H; State Key Laboratory of Vegetation and Environmental Change, Institute of Botany, Chinese Academy of Sciences, Beijing 100093, China.
  • Giosan L; State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China.
  • Haghipour N; Department of Earth Sciences, ETH Zurich, 8092, Switzerland.
  • Hou P; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543.
  • Lupker M; Department of Earth Sciences, ETH Zurich, 8092, Switzerland.
  • McIntyre CP; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543.
  • Montluçon DB; Department of Earth Sciences, ETH Zurich, 8092, Switzerland.
  • Peucker-Ehrenbrink B; Laboratory for Ion Beam Physics, Department of Physics, ETH Zurich, 8093 Zurich, Switzerland.
  • Ponton C; 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.
  • Schefuß E; Department of Earth Sciences, ETH Zurich, 8092, Switzerland.
  • Schwab MS; Department of Earth Sciences, ETH Zurich, 8092, Switzerland.
  • Voss BM; Laboratory for Ion Beam Physics, Department of Physics, ETH Zurich, 8093 Zurich, Switzerland.
  • Wacker L; Department of Earth Sciences, ETH Zurich, 8092, Switzerland.
  • Wu Y; Department of Marine Chemistry and Geochemistry, Woods Hole Oceanographic Institution, Woods Hole, MA 02543.
  • Zhao M; Department of Geology and Geophysics, Woods Hole Oceanographic Institution, Woods Hole, MA 02543.
Proc Natl Acad Sci U S A ; 118(8)2021 02 23.
Article en En | MEDLINE | ID: mdl-33593902
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.
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suelo / Carbono / Ecosistema / Sedimentos Geológicos / Ríos Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2021 Tipo del documento: Article Pais de publicación: Estados Unidos
Texto completo
Añadir a Mi BVS
Imprimir
XML
PubMed Links
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Texto completo: 1 Colección: 01-internacional Base de datos: MEDLINE Asunto principal: Suelo / Carbono / Ecosistema / Sedimentos Geológicos / Ríos Idioma: En Revista: Proc Natl Acad Sci U S A Año: 2021 Tipo del documento: Article Pais de publicación: Estados Unidos