Climate control on terrestrial biospheric carbon turnover
Timothy I. Eglinton, Valier Galy, Jordon Hemingway, Xiaojuan Feng, Hongyan Bao, Thomas M. Blattmann, Angela F. Dickens, Hannah Gies, Liviu Giosan, Negar Haghipour, Pengfei Hou, Maarten Lupker, Cameron McIntyre, Daniel B. Montluçon, Bernhard Peucker‐Ehrenbrink, Camilo Ponton, Enno Schefuß, Melissa Schwab, Britta Voß, Lukas Wacker, Ying Wu, Meixun Zhao
Abstract
C 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.