Spiegel, Timo; Scholz, Florian; Schmidt, Mark; Perner, Mirjam: Porewater ion concentrations and total alkalinity in the Kiel Bight, SW Baltic Sea from 2016 to 2025 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.988017 (dataset in review), In: Spiegel, T et al.: Water column, solid phase and porewater data in the Kiel Bight, SW Baltic Sea from 2016 to 2025 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.988013 (dataset in review)
Abstract:
This dataset presents porewater and bottom water data from 63 stations in the Kiel Bight taken during the research cruises BE03/2016 (08.03.2016), BE10/2016 (19.10.2016), BE10/2018 (23.10.2018), BE03/2019 (15.03.2019), L23-13 (13.09.2023 - 15.09.2023), Sagitta24-1 (16.09.2024), Sagitta24-2 (23.09.2024), L25-2b (09.02.2025 - 17.02.2025) and EMB374 (04.09.2025 - 13.09.2025). Short sediment cores (<50cm) were recovered using a Multicorer (MUC), Minicorer (MIC) or Rumohrlot (RL). At 22 of those stations, bottom water and porewater samples were analysed for total alkalinity (TA), ammonium (NH4+), sulfate (SO42-), hydrogen sulfide (H2S), dissolved iron (Fe2+) and dissolved manganese (Mn2+). At 41 stations, exclusively a bottom water sample was taken for H2S measurements. Bottom waters were sampled from the supernatant water in the sediment cores. Porewater samples were extracted from the sediments using rhizones. TA was determined by titration (METROHM 876 Dosimat Plus), NH4+ and H2S using a photometer (Hitachi U-2900), SO42- by Ion Chromatography (METROHM 761 Compact) and Fe2+ and Mn2+ by Inductively Coupled Plasma Optical Emission Spectroscopy (Varian 720-ES). The collected data will be used to determine the spatial and temporal variability of hydrogen sulfide in bottom waters of the Kiel Bight, (ii) identify the controlling factors governing the accumulation of hydrogen sulfide at the seafloor, and (iii) establish an early warning system of sulfidic seafloor conditions for regional stakeholders in the Baltic Sea.
Keyword(s):
Supplement to:
Spiegel, Timo; Thiele, Matthias; Löptien, Ulrike; Dietze, Heiner; Friedland, René; Bange, Hermann W; Vahrenkamp, Sarima; Perner, Mirjam; Scholz, Florian (in review): Spatial and temporal patterns of bottom water euxinia in shallow areas of the SW Baltic Sea.
Project(s):
Funding:
Federal Ministry of Research, Technology and Space (BMFTR), grant/award no. 03F0953C: DAM mareXtreme - PrimePrevention, GEOMAR
Coverage:
Median Latitude: 54.538561 * Median Longitude: 10.129043 * South-bound Latitude: 54.432923 * West-bound Longitude: 9.938408 * North-bound Latitude: 54.700082 * East-bound Longitude: 10.306960
Date/Time Start: 2016-03-08T00:00:00 * Date/Time End: 2025-09-12T14:19:32
Minimum DEPTH, sediment/rock: 0.000 m * Maximum DEPTH, sediment/rock: 0.325 m
Event(s):
BE03/2016_MIC1 * Latitude: 54.529543 * Longitude: 10.042012 * Date/Time: 2016-03-08T00:00:00 * Recovery: <0.5 m * Location: Kieler Bucht * Campaign: BE03/2016 * Basis: Littorina * Method/Device: MiniCorer (MIC)
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | Spiegel, Timo | |||
| 2 | Date/Time of event | Date/Time | Spiegel, Timo | |||
| 3 | Latitude of event | Latitude | Spiegel, Timo | |||
| 4 | Longitude of event | Longitude | Spiegel, Timo | |||
| 5 | DEPTH, sediment/rock | Depth sed | m | Spiegel, Timo | Geocode | |
| 6 | Alkalinity, total | AT | mmol(eq)/l | Spiegel, Timo | Potentiometric titration system, Metrohm, Metrohm Dosimat plus 876 | |
| 7 | Ammonium | [NH4]+ | µmol/l | Spiegel, Timo | Spectrophotometer, Hitachi, U-2900 | |
| 8 | Sulfate | [SO4]2- | mmol/l | Spiegel, Timo | Ion chromatograph, Metrohm, Compact IC 761 | |
| 9 | Hydrogen sulfide | H2S | µmol/l | Spiegel, Timo | Spectrophotometer, Hitachi, U-2900 | |
| 10 | Iron 2+ | Fe2+ | µmol/l | Spiegel, Timo | ICP-OES, VARIAN 720-ES | |
| 11 | Manganese 2+ | Mn2+ | µmol/l | Spiegel, Timo | ICP-OES, VARIAN 720-ES |
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
1868 data points