Spiegel, Timo; Scholz, Florian; Schmidt, Mark; Perner, Mirjam: Nitrate and hydrogen sulfide concentrations of the water column in the Kiel Bight, SW Baltic Sea from 2018 to 2025 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.988019 (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 hydrogen sulfide (H2S) and nitrate (NO3-) concentrations in the water column at 15 stations in the Kiel Bight taken during the research cruises BE10/2018 (23.10.2018), BE03/2019 (15.03.2019), L23-13 (13.09.2023 - 15.09.2023), Hai24VE2 (24.09.2024) and EMB374 (04.09.2025 - 13.09.2025). Water samples were collected using Niskin bottles attached to a stainless-steel framework with CTD sensors. Concentrations of H2S and NO3- were measured photometrically (Hitachi U-2900). The data are used to describe seasonal hypoxia in the Kiel Bight water column and are combined with sediment and porewater data to identify controlling factors governing the accumulation of H2S at the seafloor. Furthermore, we compare the H2S measurements from the deepest Niskin bottle with bottom water H2S concentrations obtained from the benthic tracer profiler and from the overlying water in sediment cores. This allows us to illustrate H2S trends from several meters above the seafloor down to the sediment-water interface, and to discuss advantages and limitations of the different sampling techniques in characterizing geochemical conditions in the benthic environment.
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: 54.539505 * Median Longitude: 10.096421 * South-bound Latitude: 54.479667 * West-bound Longitude: 9.946667 * North-bound Latitude: 54.699983 * East-bound Longitude: 10.313583
Date/Time Start: 2018-10-22T00:00:00 * Date/Time End: 2025-09-12T12:49:26
Minimum DEPTH, water: 0.7 m * Maximum DEPTH, water: 29.7 m
Event(s):
BE03/2019_CTD1 * Latitude: 54.529415 * Longitude: 10.041490 * Date/Time: 2019-03-14T00:00:00 * Location: Kieler Bucht * Campaign: BE03/2019 * Basis: Littorina * Method/Device: CTD/Rosette (CTD-RO)
BE10/2018_CTD1 * Latitude: 54.529427 * Longitude: 10.042262 * Date/Time: 2018-10-22T00:00:00 * Location: Kieler Bucht * Campaign: BE10/2018 * Basis: Littorina * Method/Device: CTD/Rosette (CTD-RO)
EMB374_55-1 (Eckernförder Bucht) * Latitude: 54.482922 * Longitude: 9.947810 * Date/Time: 2025-09-11T08:55:23 * Elevation: -23.0 m * Campaign: EMB374 (Hypox&C-stocks) * Basis: Elisabeth Mann Borgese * Method/Device: CTD/Rosette (CTD-RO) * Comment: 23m
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, water | Depth water | m | Spiegel, Timo | Geocode | |
| 6 | Nitrate | [NO3]- | µmol/l | Spiegel, Timo | Spectrophotometer, Hitachi, U-2900 | |
| 7 | Hydrogen sulfide | H2S | µmol/l | Spiegel, Timo | Spectrophotometer, Hitachi, U-2900 |
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:
121 data points