[Carpinteria Salt Marsh Elemental and Isotope Composition Data for Sediment and Biomass] - Elemental and isoptopic composition of sediment and biomass from the Carpinteria Salt March sampled in 2020 and 2021 (Carbon Storage in Mangrove Ecosystems via Abiotic Sulfurization)

We collected six sediment cores from three habitat types at Carpinteria Salt Marsh Reserve (34.41336°N, 119.84365°W) in July 2020. One core was used to establish dry bulk density, while the other was reserved for geochemical measurements.

Both cores were kept at -20°C until analysis could be carried out. We provide elemental concentrations (organic C/N/S, Fe, pyrite) and isotopic compositions (δ13C, δ34S) of important carbon, iron and sulfur sediment pools. Additional biomass samples were collected between 2020 and 2023 and were also analyzed for elemental (C/N/S) and isotopic compositions (δ13C, δ34S).