Baltic - North Sea

This record contains 6 datasets used in "Benthic Alkalinity fluxes from coastal sediments of the Baltic and North Seas: Comparing approaches and identifying knowledge gaps" published at Biogeosciences. Data were gathered during two cruises in the North Sea: HE541 (Sept 2019) MSM50a (Jan 2016), and two in the Baltic Sea: EMB111 (Aug-Sept 2015) and EMB238 (May 2020). Results from MSM50 and EMB111 are published by Lipka et al. (2018) and Gogina et al. (2018). https://figshare.com/account/home# 1) CombinedData_for_PROFILE_PW.xlsx 2) flux_summary.csv 3) NSea_Baltic_sediment.xlsx 4) PROFILE_prod_irr_summary.csv 5) Ra_based_fluxes.csv 6) HE541_RaFlux_summary.xlsx <br> 1) Input parameters and concentrations used to inform the PROFILE models. All concentrations are in units of mM. 2) Modelled sediment-water fluxes, as averages across all cores sampled at each site. Units are µmol cm-2 hr-1 <strong>flux_top:</strong> PROFILE output sediment-water flux <strong>flux_incubation</strong>: sediment-water flux calculated by combining Ra-224 derived porewater flushing rates from ex-situ incubations with surficial porewater concentration measurements. <strong>flux_budget</strong>: sediment-water flux determined from Ra-224 decay balance combined with surficial porewater concentrations <strong>flux_Br</strong>: sediment-water flux determined by combining Br- derived irrigation rates from ex-situ core incubations with surficial porewater concentrations 3) Combined dataset with separate tabs containing: a) metadata for the sites at which samples were collected b) porewater concentrations for metals, TA, DIC (units mM), and 13C-DIC (permil) c) nutrient concentrations in porewater (µM) d) sediment-water flux results from HE541 cruise, including Br-derived irrigation rates and O2 fluxes 4) PROFILE output of production and irrigation, integrated over the length of the core (µmol cm-3 hr-1). 5) Table containing computed water fluxes (irrigation rates) and sediment-water fluxes derived from ex-situ incubations (flux_incubation and flux_Br) as well as Ra-224 budget (flux_budget). Units are L m-2 d-1 for irrigation rates and µmol m-2 hr-1 for sediment-water fluxes. 6) Calculations of irrigation rates from Ra-224 measurements in surface water (column G), pore water (column L), and ex-situ incubations (columns M and N). <br> Lipka, M., Woelfel, J., Gogina, M., Kallmeyer, J., Liu, B., Morys, C., Forster, S. and Böttcher, M. E.: Solute reservoirs reflect variability of early diagenetic processes in temperate brackish surface sediments, Front. Mar. Sci., 9(NOV), 1–20, doi:10.3389/fmars.2018.00413, 2018. Gogina, M., Lipka, M., Woelfel, J., Liu, B., Morys, C., Böttcher, M. E. and Zettler, M. L.: In Search of a Field-Based Relationship Between Benthic Macrofauna and Biogeochemistry in a Modern Brackish Coastal Sea, Front. Mar. Sci., 5(DEC), 1–18, doi:10.3389/fmars.2018.00489, 2018.