Submarine groundwater discharge and gas hydrate dissociation fuel organic matter formation in Arctic fjord sediments

Data on sedimentary organic carbon, total nitrogen and their stable isotopes from sediments collected in Svalbard fjords. Furthermore, porewater chloride concentration and water isotopes were measured. The excel file contains three sheets: · Metadata – Description of all columns present in the other 2 sheets · Core_information – Sampling location and sampling gear for every individual core · Measured_variables – all measurements of the individual parameters The research leading to these results has received funding from the Norwegian Financial Mechanism 2014–2021 project no. 2019/34/H/ST10/00645 and within the statutory activities of the Institute of Oceanology Polish Academy of Science. W.-L.H. acknowledges the support from the Swedish Research Council (VR) under the project "Cryosphere-driven submarine groundwater in the Arctic" (Project No: 2021-04962).