Fuhr, Michael; Parameswaran, Naveen Kumar; Wallmann, Klaus; Sommer, Stefan; Adam-Beyer, Nicole; Perner, Mirjam; Dale, Andy W: Alkalinity concentrations from two benthic chambers and the ambient bottom water during an in-situ incubation experiment in July 2025 [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.992806 (dataset in review), In: Fuhr, M et al.: Bottom water chemistry during in-situ incubation experiments on enhanced benthic calcite weathering in July 2025 [dataset bundled publication]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.992805 (dataset in review)
Abstract:
The dataset contains total alkalinity measurements from water samples collected during a 16-day in-situ incubation experiment in the Baltic Sea (2025-07-12 to 2025-07-29). Samples were collected using an automated glass-syringe sampler deployed within two benthic chambers of a Biogeochemical Observatory (BIGO, Sommer et al., 2009) at 54° 34.432' N, 10° 10.776' E, at 22 m water depth. In one chamber, 29 g of fine calcite powder were added to the bottom water. Seven samples per chamber and from the ambient bottom water were taken to monitor alkalinity changes resulting from calcite dissolution, providing a direct measure of the ocean alkalinity enhancement (OAE)
References:
Sommer, Stefan; Linke, Peter; Pfannkuche, Olaf; Schleicher, Tina; Schneider von Deimling, Jens; Reitz, Anja; Haeckel, Matthias; Flögel, Sascha; Hensen, Christian (2009): Seabed methane emissions and the habitat of frenulate tubeworms on the Captain Arutyunov mud volcano (Gulf of Cadiz). Marine Ecology Progress Series, 382, 69-86, https://doi.org/10.3354/meps07956
Project(s):
Funding:
Federal Ministry of Research, Technology and Space (BMFTR), grant/award no. 03F0965A: DAM CDRmare - RETAKE-2, GEOMAR
Coverage:
Latitude: 54.573870 * Longitude: 10.179600
Date/Time Start: 2025-07-12T11:34:21 * Date/Time End: 2025-07-29T10:51:47
Event(s):
AL2025/12_2-3 * Latitude: 54.573870 * Longitude: 10.179600 * Date/Time: 2025-07-12T11:34:21 * Campaign: AL2025/12 (DALE-BIGO) * Basis: Alkor (1990) * Method/Device: Biogeochemical observatory (BIGO) * Comment: Lander deployment
AL2025/19_2-3 * Latitude: 54.573870 * Longitude: 10.179600 * Date/Time: 2025-07-29T10:51:47 * Campaign: AL2025/19 (DALE-BIGO II) * Basis: Alkor (1990) * Method/Device: Biogeochemical observatory (BIGO) * Comment: Lander recovery
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Type of study | Study type | Dale, Andy W | |||
| 2 | Sample type | Samp type | Dale, Andy W | |||
| 3 | LATITUDE | Latitude | Dale, Andy W | Geocode | ||
| 4 | LONGITUDE | Longitude | Dale, Andy W | Geocode | ||
| 5 | Instrument | Instrument | Dale, Andy W | |||
| 6 | Sampling date/time, experiment | Date/time sampling exp | Dale, Andy W | UTC, internal computer clock | ||
| 7 | Treatment | Treat | Dale, Andy W | |||
| 8 | Sample ID | Sample ID | Dale, Andy W | |||
| 9 | Alkalinity, total | AT | µmol/l | Dale, Andy W | Titration device, Metrohm, 775 Dosimat |
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:
196 data points