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Pore-water pH, H2S, Cl-, SO42-, SiO2, NO2-, PO43-, NH4+, NO3-, major and trace element data from MUC cores taken during RV HEINCKE cruises HE575 and HE595 in the Helgoland Mud Area, German Bight

This dataset includes downcore measurements of pH values, H2S, Cl-, SO42-, SiO2, NO2-, PO43-, NH4+, NO3-, As, Ba, Ca, Cu, Fe, K, Li, Mg, Mn, Mo, P, Si and Sr concentrations for sediment cores retrieved using multi-corer sampling during RV Heincke expeditions HE575 and HE595 in 2021 and 2022, respectively. The samples were collected in the framework of the Project APOC (Anthropogenic impacts on particulate organic carbon cycling in the North Sea). All measurements were performed in the laboratories of the Alfred Wegener Institute (AWI) in Bremerhaven, Germany, except pH values, which were determined onboard the research vessel.

Grundwassermessstelle STELLAU F2 4436.0

Dieser Datensatz beschreibt die Grundwassermessstelle STELLAU F2 4436.0 in Schleswig-Holstein. Die Messstelle liegt im Grundwasserkörper N8 : Südholstein. Es liegen insgesamt 31251 Messwerte vor. Es liegen außerdem 3 Probenentnahmen vor (siehe Resourcen).

Seasonal nutrient dynamic in the Elbe Estuary June 2019

This dataset contains measurements from LP20190603, collected aboard the R/V Ludwig Prandtl in June 2019 in the Elbe Estuary. In a transect cruise, geobiochemical parameters were measured starting in the North Sea (53.98°N 8.36°E) to the port of Oortkaten in the upstream Elbe Estuary (53.46°N 10.06°E). Sampling was conducted upstream against the outgoing tide to prevent tidal effects on the measurements. Water samples were taken approximately every 20 min. The discrete water samples were used to measure dissolved inorganic nutrient, nitrate stable isotope composition, suspended particulate matter (SPM) concentration, particulate carbon and nitrogen content of SPM and nitrogen stable isotope composition of SPM. An onboard membrane pump provided the on-line in situ FerryBox system. It continuously measured oxygen, salinity, and temperature during the cruise. A N2O analyzer coupled (Model 914-0022, Los Gatos Res. Inc., San Jose, CA, USA) with a seawater/gas equilibrator using off-axis cavity output spectroscopy continuously detected dry mole fraction of dissolved nitrous oxide along the estuary. Aim of the cruise was to study the interplay between eutrophication, in-stream nutrient regeneration and N2O emissions in a temperate Estuary.

Grundwassermessstelle TREMSBÜTTEL F1 4351.0

Dieser Datensatz beschreibt die Grundwassermessstelle TREMSBÜTTEL F1 4351.0 in Schleswig-Holstein. Die Messstelle liegt im Grundwasserkörper ST16 : Trave - Mitte. Es liegen insgesamt 35494 Messwerte vor. Es liegen außerdem 4 Probenentnahmen vor (siehe Resourcen).

Hydrochemistry time series at List Reede, Sylt, Germany, in 2020

The Sylt Roads pelagic time series covers physical and hydrochemical parameters in the Sylt–Rømø bight, Wadden Sea, North Sea. Sea surface temperature (SST), salinity, pH, ammonium, nitrite, nitrate, dissolved (in)organic nitrogen (DIN, DON), silicate, soluble reactive phosphorus (SRP), dissolved organic phosphorus (DOP), chlorophyll a and suspended matter concentrations (SPM) are measured twice a week. These parameters are used to identify long-term changes in the Northern Wadden Sea.

Carbon system parameters in the Baltic Sea from 2003 to 2023 using IOW monitoring data

The saturation status of calcium carbonate forms was calculated as part of the CDRmare RETAKE project effort to assess potentials and impacts for using alkalinity enhancement to enhance the capture of atmospheric carbon dioxide (CO2). Therefore, this data set is a compilation of carbonate system parameters measured during the monitoring cruises of the Leibniz Institute for Baltic Sea Research Warnemünde (IOW) in the Baltic Sea from 2003 to 2023. Ancillary data was retrieved using the IOW's ODIN2 data tool accordingly. The following permanent link allows one to search and extract the data using our settings: https://odin2.io-warnemuende.de/957-0489-676. We paired the carbonate and ancillary (nutrient and hydrogen sulfide, H2S, data) data by selecting the respective cruise, station, timestamp, and depth. Next, we calculated the calcite and aragonite saturation state and other carbonate system parameters using the measured parameters always when two carbonate-system parameters were available. For these calculations, we used CO2SYS v.3.1.2 script for MATLAB (Sharp et al., 2023; van Heuven et al., 2011; Lewis and Wallace, 1998) with the following dissociation constants settings: K1 and K2 of Waters, Millero, & Woosley (2014), KSO4 of Dickson (1990), KF of Perez & Fraga (1987), and TB of Uppström (1979). Propagated uncertainty was calculated using the errors script for MATLAB CO2SYS of Orr et al. (2018) and applying the respective errors: total alkalinity (AT) = 4 µmol/kg, total inorganic dissolved carbon (CT) = 2 µmol/kg, pH = 0.005 (Total), phosphate (PO4) = 3.8%, silicate (SiO4) = 4.6%, and ammonium (NH4) = 9.2%. All carbonate system parameters are presented under 25°C and 0 atm conditions.

Grundwassermessstelle NEBEL BEO 7B F1 1284.0

Dieser Datensatz beschreibt die Grundwassermessstelle NEBEL BEO 7B F1 1284.0 in Schleswig-Holstein. Die Messstelle liegt im Grundwasserkörper EI05 : Amrum. Es liegen insgesamt 55716 Messwerte vor. Es liegen außerdem 45 Probenentnahmen vor (siehe Resourcen).

Grundwassermessstelle BARGFELD GRASTWIETE F2 4361.0

Dieser Datensatz beschreibt die Grundwassermessstelle BARGFELD GRASTWIETE F2 4361.0 in Schleswig-Holstein. Die Messstelle liegt im Grundwasserkörper N8 : Südholstein. Es liegen insgesamt 24868 Messwerte vor. Es liegen außerdem 6 Probenentnahmen vor (siehe Resourcen).

Distribution of contaminants from the Elbe outflow into the North Sea (German Bight) based on water samples from the MOSES cruise Sternfahrt 10 in 2023

The Sternfahrt-10 of the MOSES campaign, from 29th August until the 15th of September 2023, had two objectives. One was to follow the dispersion of pollutants transported by the Elbe water into the North Sea, previously observed during the Elbe-Freshwater and Elbe-Tidal cruises. And second the distribution of the Elbe water within the German Bight. Therefore, drifter groups were deployed to follow individual water parcels. Those drifters were followed subsequently by three ships (RV Ludwig Prandtl, RV Littorina, RV Mya II), to extend the time period of measurements. Along the tracks, water samples were taken close to the drifters, alternatively at stations from previous cruises, resulting in 12 to 24 sampling points per week. In terms to detect the concentration of a variety of nutrients and carbon compounds from the south-eastern North Sea up to the island Amrum. Additionally, basic hydrographic parameters and greenhouse gases were sampled continuously throughout the whole cruise. Those results are not part of the present dataset, but can be found here, https://doi.org/10.1594/PANGAEA.971874. To ensure the comparability of the measured parameters a transportable container laboratory was passed from ship to ship always equipped with the same sensor systems. Just for specific water samples some special equipment was added. A map of the different tracks as well as information about the used sensors and data treatment, you can find in the additional material. For more detailed information about the MOSES Project and the cruise Sternfahrt-10, see the article cited in references.

Soil physicochemical properties of the plot DPFL_14 (Pfeiffhausen, Germany) in 2016, 2020 and 2022

As part of PhytOakmeter platform (www.phytoakmeter.de), soil chemical parameters were determined in 2016, 2020 and 2022. Soil pH was measured using a glass electrode in a 1:2.5 soil-to-0.01 M CaCl2 suspension after one hour of equilibration. Gravimetric soil moisture was assessed with a fully automated moisture analyzer (DBS60-3, KERN & SOHN GmbH, Balingen, Germany), here defined as soil moisture (MOI). Total nitrogen (TN) and total carbon (TC) contents in the soil were analyzed in triplicate through dry combustion using a Vario elemental analyzer (EL III, Elementar, Hanau, Germany), and the carbon-to-nitrogen ratio (TC/TN) was subsequently calculated from these values. To evaluate the potentially bioavailable soil organic carbon and nitrogen for microbial activity, hot water-extractable carbon and nitrogen (HWC and HWN, respectively) were determined following the methods of Ghani et al. (2003) and Schulz et al. (2011). Additionally, the labile organic carbon and nitrogen easily decomposable by soil microorganisms were measured as cold water-extractable carbon (CWC) and nitrogen (CWN) based on procedures described by Zsolnay (1996), Zakharova et al. (2015), and Schmidt et al. (2017). Ammonium and nitrate (NH4±N and NO3—N, respectively) were quantified, with their sum representing the total mineral nitrogen content (Nmin).

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