Citation:

PANGAEA.992805 (dataset in review)

Name: Bottom water chemistry during in-situ incubation experiments on enhanced benthic calcite weathering in July 2025
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Alkalinity; calcite weathering; CDR; enhanced weathering; incubation experiment

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Abstract:

The data was produced during a 16 day in-situ incubation experiment in the Baltic Sea. In order to assess the potential for enhanced benthic calcite weathering as a ocean alkalinisation and thus negative emissions strategy, a Biogeochemical Observatory (BIGO, Sommer et al., 2009) was deployed at 54° 34.432 N, 10° 10.776 E, at 22 m water depth between 2025-07-12 and 2025-07-29. The BIGO is equipped with two benthic chambers that were lowerd to the sea floor. In chamber two, 29 g of fine calcite powder were added to the bottom water. 7 Samples were taken via an automatted glassyringe sampler from each chamber and the ambient bottom water.

Keyword(s):

Alkalinity; calcite weathering; CDR; enhanced weathering; incubation experiment

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):

DAM CDRmare - RETAKE: CO2 removal by alkalinity enhancement: potential, benefits and risks (RETAKE)

Research Mission of the German Marine Research Alliance (DAM): Marine carbon sinks in decarbonisation pathways (CDRmare)

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

License:

Creative Commons Attribution 4.0 International (CC-BY-4.0) (License comes into effect after moratorium ends)

Size:

3 datasets

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Datasets listed in this bundled publication

Fuhr, M; Parameswaran, NK; Wallmann, K et al. (in review): Alkalinity concentrations from two benthic chambers and the ambient bottom water during an in-situ incubation experiment in July 2025. https://doi.pangaea.de/10.1594/PANGAEA.992806
Fuhr, M; Parameswaran, NK; Wallmann, K et al. (in review): Element concentrations from two benthic chambers and the ambient bottom water during an in-situ incubation experiment in July 2025. https://doi.pangaea.de/10.1594/PANGAEA.992808
Fuhr, M; Parameswaran, NK; Wallmann, K et al. (in review): Nutrient concentrations from two benthic chambers and the ambient bottom water during an in-situ incubation experiment in July 2025. https://doi.pangaea.de/10.1594/PANGAEA.992807