Schneider, Julieta; Riebesell, Ulf; Moras, Charly; Marín-Samper, Laura; Kittu, Leila; Ortiz Cortes, Joaquin; Schulz, Kai Georg (2025): KOSMOS 2022 Bergen mesocosm study on ocean alkalinity enhancement: carbonate chemistry , CO2 flux data and calcification estimates [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.983061 (DOI registration in progress)
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Published: 2025-11-26
Abstract:
A Large-scale mesocosm experiment was conducted in the temperate fjord ecosystem near Bergen, Norway during late spring 2022 to investigate the effects of OAE on biogeochemical processes and organisms under close-to-natural conditions. A non-CO2-equilibrated approach was chosen, simulating OAE with calcium- and silicon-based minerals. A gradient of five OAE levels was achieved by increasing total alkalinity (TA) by 0–600 µmol kg-1. Carbonate chemistry parameters were monitored for the total length of the 53-day experiment. The added TA remained relatively stable over the experimental period and the measured CO2 gas exchange rate was comparable to what would be expected for large oceanic regions. The study and data set offer insights into impacts of non-equilibrated alkalinity enhancement on the carbonate system, air-sea gas exchange and carbon fixation.
Keyword(s):
Related to:
Schneider, Julieta; Riebesell, Ulf; Moras, Charly; Marín-Samper, Laura; Kittu, Leila; Ortiz Cortes, Joaquin; Schulz, Kai Georg (preprint): Air-sea gas exchange measurements helped derive in-situ organic and inorganic carbon fixation in response to Ocean Alkalinity Enhancement in a temperate plankton community. https://doi.org/10.5194/egusphere-2025-524
Project(s):
Funding:
Horizon 2020 (H2020), grant/award no. 871081: AQUACOSM-plus: Network of Leading Ecosystem Scale Experimental AQUAtic MesoCOSM Facilities Connecting Rivers, Lakes, Estuaries and Oceans in Europe and beyond
Coverage:
Latitude: 60.265278 * Longitude: 5.205833
Date/Time Start: 2022-05-14T00:00:00 * Date/Time End: 2022-07-05T00:00:00
Minimum DEPTH, water: 20 m * Maximum DEPTH, water: 20 m
Event(s):
KOSMOS_2022_Fjord * Latitude: 60.265278 * Longitude: 5.205833 * Date/Time Start: 2022-05-13T00:00:00 * Date/Time End: 2022-07-07T00:00:00 * Campaign: KOSMOS_2022 (KOSMOS Bergen) * Method/Device: Mesocosm experiment (MESO)
KOSMOS_2022_Mesocosm-M1 * Latitude: 60.265278 * Longitude: 5.205833 * Date/Time Start: 2022-05-13T00:00:00 * Date/Time End: 2022-07-07T00:00:00 * Campaign: KOSMOS_2022 (KOSMOS Bergen) * Method/Device: Mesocosm experiment (MESO)
KOSMOS_2022_Mesocosm-M2 * Latitude: 60.265278 * Longitude: 5.205833 * Date/Time Start: 2022-05-13T00:00:00 * Date/Time End: 2022-07-07T00:00:00 * Campaign: KOSMOS_2022 (KOSMOS Bergen) * Method/Device: Mesocosm experiment (MESO)
Parameter(s):
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
5509 data points
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