Schneider, Julieta; Riebesell, Ulf; Moras, Charly; Marín-Samper, Laura; Kittu, Leila; Ortiz Cortes, Joaquin; Schulz, Kai Georg (2026): Seawater carbonate chemistry and carbon fixation of a temperate plankton community in response to calcium- and silicate-based Ocean Alkalinity Enhancement [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995136 (DOI registration in progress)
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Published: 2026-05-26
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.
This dataset is included in the OA-ICC data compilation maintained in the framework of the IAEA Ocean Acidification International Coordination Centre (see https://oa-icc.ipsl.fr). Original data were downloaded from the PANGAEA dataset (see Source). In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2024) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2026-05-26.
Keyword(s):
Related to:
Marín-Samper, Laura; Arístegui, Javier; Hernández-Hernández, Nauzet; Riebesell, Ulf (2026): Seawater carbonate chemistry and responses of microbial metabolic rates to non-equilibrated silicateversus calcium-based ocean alkalinity enhancement [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995139
Schneider, Julieta; Riebesell, Ulf; Moras, Charly; Marín-Samper, Laura; Kittu, Leila; Ortiz Cortes, Joaquin; Schulz, Kai Georg (2026): Carbon fixation of a temperate plankton community in response to calcium- and silicate-based Ocean Alkalinity Enhancement using air-sea gas exchange measurements. Biogeosciences, 23(1), 137-153, https://doi.org/10.5194/bg-23-137-2026
Source:
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.org/10.1594/PANGAEA.983061
References:
Nisumaa, Anne-Marin; Pesant, Stephane; Bellerby, Richard G J; Delille, Bruno; Middelburg, Jack J; Orr, James C; Riebesell, Ulf; Tyrrell, Toby; Wolf-Gladrow, Dieter A; Gattuso, Jean-Pierre (2010): EPOCA/EUR-OCEANS data compilation on the biological and biogeochemical responses to ocean acidification. Earth System Science Data, 2(2), 167-175, https://doi.org/10.5194/essd-2-167-2010
Yang, Yan; Brockmann, Patrick; Galdino, Carolina; Schindler, Uwe; Gazeau, Frédéric (2024): An update of data compilation on the biological response to ocean acidification and overview of the OA-ICC data portal. Earth System Science Data, 16(8), 3771-3780, https://doi.org/10.5194/essd-16-3771-2024
Yang, Yan; Hansson, L; Gattuso, Jean-Pierre (2016): Data compilation on the biological response to ocean acidification: an update. Earth System Science Data, 8(1), 79-87, https://doi.org/10.5194/essd-8-79-2016
Related code / software:
Gattuso, Jean-Pierre; Epitalon, Jean-Marie; Lavigne, Héloïse; Orr, James; Gentili, Bernard; Hagens, Mathilde; Hofmann, Andreas; Mueller, Jens-Daniel; Proye, Aurélien; Rae, James; Soetaert, Karline (2024): seacarb: seawater carbonate chemistry with R. R package version 3.3.3. https://cran.r-project.org/web/packages/seacarb/index.html
Project(s):
Funding:
Horizon 2020 of the European Commission (H2020), grant/award no. 869357: OceanNETs: Ocean-based Negative Emission Technologies
Horizon 2020 of the European Commission (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:
8380 data points
Download Data
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