[{"name":"martens-2024-offshelf-terroc-1-old","title":"Accumulation rates, isotopic and molecular data of terrestrial carbon in sediments of the Laptev Sea continental margin","summary":"This dataset contains isotopic (\u00b9\u00b3C and \u00b9\u2074C) and molecular biomarker data (lignin phenols, n-alkanes, n-alkanoic acids) of organic carbon in surface sediments of the Laptev Sea continental margin. We also present a collection of \u00b2\u00b9\u2070Pbxs measurements in 12 shallow sediment cores and present a new terrestrial organic carbon (terrOC) budget for the entire Laptev Sea continental margin. \r\n\r\nThe dataset has been used to quantify accumulation rates of terrestrial carbon for the Laptev Sea slope and rise, and compare terrOC fluxes in these systems with shelf-based terrOC accumulation rates. Besides quantifying terrOC using dual-isotope (\u00b9\u00b3C and \u00b9\u2074C) source apportionment, we utilize concentrations, degradation proxies and relative abundances or terrestrial biomarkers to trace off-shelf terrOC transport and its remineralization. \r\n\r\nThe data builds on sediment samples taken along four transects, including a Laptev Sea shelf transect, a slope transect, as well as two shelf-slope-rise transects during Arctic Ocean expeditions in 2014 (SWERUS-C3) and in 2020 (ISSS-2020). ","citations":"Martens, J., Tesi, T., Rusakov, V., Semiletov, I., Dudarev, O., and Gustafsson, \u00d6., Terrestrial organic carbon transport, degradation and accumulation along the shelf-basin continuum of the Laptev Sea, Arctic Ocean. Accepted for publication in Global Biogeochemical Cycles.","comments":"The data presented in this dataset are also included in the supplementary information of the Martens et al. (2024) paper, but not in the form of one single spreadsheet file as made available here. Please, cite the article by Martens et al. (2024) when using this dataset.","category":"Marine","subcategory":"Arctic carbon","keywords":"Carbon isotopes; Carbon flux; Permafrost thaw; Ocean acidification; Climate change","scientist":"Jannik Martens, Tommaso Tesi, Valeriy Rusakov, Igor Semiletov, Oleg Dudarev, \u00d6rjan Gustafsson","firstname":"Jannik","lastname":"Martens","address":"Department of Environmental Science; Stockholm University","postalcode":"SE-106 91","city":"Stockholm","province":"","country":"Sweden","parameters":"Earth science > Oceans > Ocean chemistry > Biogeochemical cycles","location":"Ocean > Arctic Ocean","progress":"","language":"English","project":"This study was supported by the European Research Council (ERC Advanced Grant CC-TOP 695331 to \u00d6G), the EU H2020-funded project Nunataryuk (Grant 773421 to \u00d6G), the Swedish Research Council (Grant 2021-06670 to JM, Grant 2017-01601 to \u00d6G), and the Russian Science Foundation (grant 21-77-30001 to IS). Field campaigns to obtain gap-filling samples were supported by the Knut and Alice Wallenberg Foundation (KAW contract 2011.0027 to \u00d6G) as part of the SWERUS-C3 program and by the Russian Ministry of Science and Higher Education (grant \u201cPriority-2030\u201d to Tomsk State University, and theme 121021500057-4 to Pacific Oceanological Institute FEB RAS).","publisher":"Bolin Centre Database","version":"1.0","constrains":"","access":""}]