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Ferderer, Aaron; Schulz, Kai Georg; Riebesell, Ulf; Baker, Kirralee G; Chase, Zanna; Bach, Lennart Thomas (2026): Seawater carbonate chemistry and the effect of silicate- and calcium-based ocean alkalinity enhancement on diatom silicification [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.995155 (DOI registration in progress)

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Published: 2026-05-28

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Abstract:
These files contain the data recorded from a mesocosm experiment conducted in Bergen, Norway 2022 which assessed the effect of simualted mineral-based (silicate or calcium) ocean alkalinity enhancement (OAE) on diatom silicification. Ten mesocosms were used in total, divided into two groups either the silicate- or calcium based group and alkalinity was increased by either 0, 150, 300, 450 or 600 µmol L-1 above natrually occuring levels. The PDMPO-fluorescence (an appropriate proxy for silicification) of diatoms was recorded on eight seperate days during the experiment. Accompanying data includes measured; macronutrients (nitrate, nitrite, phophate, silicate), total alkalinity, biogenic silica in the water column and sediment trap.
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 Institute for Marine and Antarctic Studies (IMAS) (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 2026-05-28.
Keyword(s):
Coast and continental shelf; Community composition and diversity; Entire community; Laboratory experiment; Mesocosm or benthocosm; North Atlantic; Other studied parameter or process; Pelagos; Temperate
Related to:
Ferderer, Aaron; Schulz, Kai Georg; Riebesell, Ulf; Baker, Kirralee G; Chase, Zanna; Bach, Lennart Thomas (2024): Investigating the effect of silicate- and calcium-based ocean alkalinity enhancement on diatom silicification. Biogeosciences, 21(11), 2777-2794, https://doi.org/10.5194/bg-21-2777-2024
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
Source:
Ferderer, Aaron (2023): Investigating the effect of silicate- and calcium-based ocean alkalinity enhancement on diatom silicification - data [dataset]. Institute for Marine and Antarctic Studies, https://doi.org/10.25959/G3FN-HE45
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):
Ocean Acidification International Coordination Centre (OA-ICC)
Coverage:
Latitude: 60.265278 * Longitude: 5.205833
Date/Time Start: 2022-05-13T00:00:00 * Date/Time End: 2022-07-07T00:00:00
Event(s):
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)
KOSMOS_2022_Mesocosm-M3 * 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):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Event labelEventFerderer, Aaron
2Type of studyStudy typeFerderer, Aaron
3Day of experimentDOEdayFerderer, Aaron
4Mesocosm labelMeso labelFerderer, Aaron
5Alkalinity, totalATµmol/kgFerderer, Aaron
6TreatmentTreatFerderer, AaronMineral
7VolumeVollFerderer, AaronMesocosm
8Biogenic silicabSiO2µmol/lFerderer, Aaronwater column
9Biogenic silicabSiO2µmol/lFerderer, Aaronsediment
10Biogenic silicabSiO2µmol/lFerderer, Aaronaccumulated in the sediment trap
11SilicateSi(OH)4µmol/lFerderer, Aaron
12Nitrate[NO3]-µmol/lFerderer, Aaron
13Nitrite[NO2]-µmol/lFerderer, Aaron
14Phosphate[PO4]3-µmol/lFerderer, Aaron
15Phosphate, standard deviation[PO4]3- std dev±Ferderer, Aaron
16Nitrate, standard deviationNO3 std dev±Ferderer, Aaron
17Nitrite, standard deviation[NO2]- std dev±Ferderer, Aaron
18Phosphate, standard deviation[PO4]3- std dev±Ferderer, Aaron
19GenusGenusFerderer, Aaron
20AreaAreaarbitrary unitsFerderer, Aaroncell
21FluorescenceFluorescencearbitrary unitsFerderer, AaronMean cell
22FluorescenceFluorescencearbitrary unitsFerderer, AaronMean cell fluorescence adjusted for exposure setting and background fluorescence
23Incubation durationInc durhFerderer, Aaron
24FluorescenceFluorescencearbitrary unitsFerderer, AaronAdjsuted mean fluorescence per hour
25FluorescenceFluorescencearbitrary unitsFerderer, AaronAdjsuted mean fluorescence per day
26PhasePhaseFerderer, AaronExperiment
27SalinitySalFerderer, Aaron
28Temperature, waterTemp°CFerderer, Aaron
29Alkalinity, totalATµmol/kgSchneider, JulietaPotentiometric titration
30pH, total scalepHTSchneider, JulietaPotentiometricT_25
31Carbon, inorganic, dissolvedDICµmol/kgSchneider, Julieta
32pH, total scalepHTSchneider, JulietaT_25 correct, Calculated
33pH, total scalepHTSchneider, JulietaCalculated using CO2SYST_insitu, Calculated
34Carbon, inorganic, dissolvedDICµmol/kgSchneider, JulietaCalculated using CO2SYS
35Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmSchneider, JulietaCalculated using CO2SYS
36Calcite saturation stateOmega CalSchneider, JulietaCalculated using CO2SYS
37Aragonite saturation stateOmega ArgSchneider, JulietaCalculated using CO2SYS
38Bicarbonate ion[HCO3]-µmol/kgSchneider, JulietaCalculated using CO2SYS
39Carbon dioxideCO2µmol/kgSchneider, JulietaCalculated using CO2SYS
40Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
41Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
42Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
43Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
44Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
45Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
46Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
47Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
48Calcite saturation stateOmega CalYang, YanCalculated using seacarb after Nisumaa et al. (2010)
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
Status:
Curation Level: Enhanced curation (CurationLevelC)
Size:
158874 data points

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