Description: Coastal peatlands are important carbon, nutrient, and trace metal stores, which might be mobilized and released to the adjacent sea upon rewetting. The objectives of this study were to quantify submarine groundwater discharge (SGD) in front of a rewetted coastal peatland at the southern Baltic Sea coast, to estimate associated fluxes of solutes, and to characterize the discharged water using stable oxygen, hydrogen, and carbon isotope composition. We directly measured SGD rates and collected the discharging water using seepage meters in summer and autumn 2021. SGD, seawater and groundwater were analyzed for major ion, nutrient, DOC/DIC and trace metal concentrations as well as the composition of water and carbon isotopes. Racasa et al. (2026) is based on this dataset.
Global identifier:
Doi(
"10.1594/PANGAEA.996292",
)
DataMeasurements(
DataMeasurements {
domain: Unspecified,
station: None,
measured_variables: [
"Ammonium",
"Area/locality",
"Barium",
"Bromide",
"Calcium",
"Carbon, inorganic, dissolved",
"Carbon, organic, dissolved",
"Chloride",
"Conductivity",
"Date/Time of event",
"Date/Time of event 2",
"Dissolved oxygen saturation",
"Event label",
"Iron",
"Latitude of event",
"Lithium",
"Location",
"Longitude of event",
"Magnesium",
"Manganese",
"Nitrate",
"Nitrite",
"Nitrogen, total dissolved",
"Nitrogen, total dissolved, total",
"Optional event label",
"Oxidation reduction (RedOx) potential",
"Oxygen, dissolved",
"Phosphate",
"Potassium",
"Salinity",
"Sample type",
"Seepage bag, rate",
"Seepage bag, volume change",
"Silicon",
"Sodium",
"Strontium",
"Sulfate",
"Temperature, water",
"Total dissolved solids",
"Type of study",
"pH",
"δ Deuterium, water",
"δ13C, dissolved inorganic carbon",
"δ18O, water",
],
methods: [
"Calculated, see Comment",
"Continuous flow analyser, Seal, AA3",
"Ion chromatograph, Metrohm, 930 Compact IC Flex",
"Multi analyzer, Analytik Jena, N/C 2100S",
"See description in dataset comment",
],
},
)
Comment: Further method details: 1) Chloride, Nitrite, Bromide, Nitrate and Sulfate concentration [mg/l]: Samples were filtered using 0.20 µm cellulose acetate (Rotilabo) membrane syringe filters. 15 mL centrifuge tubes were used as containers. Samples were stored at -20°C until analysis. 2) Sodium, Potassium, Calcium and Magnesium concentration [mg/l]: Samples were filtered using 0.20 µm cellulose acetate (Rotilabo) membrane syringe filters, and preserved using 1 M HNO3 (20 uL/ 10 mL sample). 15 mL centrifuge tubes were used as containers. Samples were stored at -20°C until analysis. 3) Dissolved Inorganic Carbon, Total Dissolved Nitrogen, Phosphate and Ammonium concentration [mg/l]: Samples were filtered in situ using 0.45 µm Filtropur S (Sarstedt) membrane syringe filters. 50 mL centrifuge tubes were used as containers. Samples were stored at 4°C until analysis (latest one week after sampling). 4) Iron, Manganese, Barium, Lithium, Strontium and Silicon concentration: Samples were filtered with a 0.45 µm cellulose acetate pre-syringe filter before filled into pre-cleaned 20 ml PE-bottles. 5) δ13C-DIC, δ18O-H2O and δ18O-H2O [mUr]: The reported values given in 'mUr' are equivalent to the traditional '‰' (Brand & Coplen, 2012). 6) δ13C-DIC [mUr]: Stable carbon isotopes were determined with a continuous-flow-isotope-monitoring mass spectrometry (CF-irmMS) using a Thermo Finnigan MAT253 gas mass spectrometer connected to a Thermo electron Gas Bench II via a Thermo Electron Conflo IV split interface as described by Winde et al. (2014). Equilibration time at room temperature was at least 18h before measurement in the mass spectrometer. Results are given versus VPDB (Hoefs, 2018). 7) δ18O-H2O and δ18O-H2O [mUr]: The composition of stable water isotopes was measured using a Picarro L2140-I cavity-ring-down spectrometer (Böttcher and Schmiedinger, 2021) in the MCM mode and using a salt trap as described by Jenner & Saban et al. (2024). Results are given with respect to the VMSOW standard. 8) DIC [mmol/L] 2: Stable carbon isotopes were determined with a continuous-flow-isotope-monitoring mass spectrometry (CF-irmMS) using a Thermo Finnigan MAT253 gas mass spectrometer connected to a Thermo electron Gas Bench II via a Thermo Electron Conflo IV split interface as described by Winde et al. (2014). Equilibration time at room temperature was at least 18h before measurement in the mass spectrometer. 9) Dissolved Organic Carbon concentration [mg/l]: Samples were filtered in situ using 0.45 µm Filtropur S (Sarstedt) membrane syringe filters, and preserved using concentrated HCl (0.15 mL/ 10 mL sample). 50 mL centrifuge tubes were used as containers. Samples were stored at 4°C until analysis (latest one week after sampling). 10) Change in volume of prefilled seepage bag: Seepage meters; height = 15 cm, radius = 28.2 cm, top area = 0.25 m^2, deployed up to 12 cm into the seafloor; a pre-filled seepage bag (3-L bag filled with 1-L seawater) was deployed to the seepage meter for a known amount of time (~1 hour 45 mins to 2 hours 15 mins). 11) Seepage rate determined with prefilled seepage bags: Calculated as vol_seepage_filled devided by area of seepage meter and time between start and end of sampling 12) Change in volume of empty seepage bag: Seepage meters as described for vol_seepage_filled, but an empty seepage bag was used to collect SGD samples 13) Seepage rate determined in empty seepage bags: Calculated as vol_seepage_empty devided by area of seepage meter and time between start and end of sampling.
Tags: Ammonium ? Tierhaltungsanlage ? Lithium ? Nitrit ? Strontium ? Nitrat ? Kohlenstoff ? Meerwasser ? Moor ? Nährstoff ? Silizium ? Wasserstoff ? Wassertemperatur ? Geografische Koordinaten ? Temperatur ? Metall ? Salzgehalt ? Hydrochemie ? Studie ? Wasserprobe ? Meeresgewässer ? Grundwasser ? Wasser ? Minderungspotenzial ? Ostseeküste ?
Region: Coastal Baltic Sea, Germany
Bounding boxes: 12.1162761° .. 12.172704° x 54.21598116° .. 54.226027°
License: Creative Commons Namensnennung 4.0 (Data access requires registration)
Language: Englisch/English
Modified: 2026-07-30
Last harvest: 31.08.2026 02:29
Time ranges: 2021-06-30 - 2021-09-15
Accessed 2 times.