Fig. 2
From: Bounding cross-shelf transport time and degradation in Siberian-Arctic land-ocean carbon transfer
Calibrated radiocarbon ages of terrigenous long-chain n-fatty acids and bulk organic carbon vs. water depth. All filled symbols refer to compound-specific radiocarbon ages of long-chain n-fatty acids (LCFAs) with black circles: data from this study, green upward-pointing triangle: data point from a previous study16, and error bars representing ± 1σ uncertainties. The linear fit to all biomarker ages (orange straight line, shaded area refers to ± 2σ uncertainties of the fit, determined by Monte Carlo simulations) is used to derive the transport time of sedimentary terrOC across the Laptev Sea shelf: \({\mathrm{Transport}}\;{\mathrm{time}}\,\left( {{\mathrm{kyr}}} \right) = {\mathrm{Age}}\,({\mathrm{kyr}}) - b\,({\mathrm{kyr}}) = a\,\left( {{\mathrm{kyr}}\,{\mathrm{m}}^{{\mathrm{ - 1}}}} \right) \times {\mathrm{Water}}\;{\mathrm{depth}}\;({\mathrm{m}})\). In contrast to the increasing ages with increasing water depth for the terrestrial biomarkers, bulk organic carbon ages (gray open diamonds) decrease due to a growing proportion of modern marine organic matter (see also Supplementary Fig. 1)
