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Welch, Zoe S; Kim, Sylvia M; Liu, Michael; Bui, An; Grigolite, Jesse; Jones, Janice L; Iglesias-Rodríguez, M Débora (2026): Seawater carbonate chemistry and biogeochemistry and composition of a phytoplankton community [dataset]. PANGAEA, https://doi.pangaea.de/10.1594/PANGAEA.993632 (DOI registration in progress)

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Published: 2026-04-15

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Abstract:
The dramatic impacts of global climate change have driven marine carbon dioxide removal (mCDR) innovation, including ocean alkalinity enhancement (OAE), in an attempt to keep global warming under 2 °C. We experimented to assess the impacts of brucite-inspired alkalinity addition (BIAA) as an OAE approach on the carbonate chemistry, biogeochemistry, and composition of the Santa Barbara Channel phytoplankton community sourced from a spring upwelling event. The BIAA treatment used MgCl2 * 6H2O and NaOH to yield a total alkalinity (TA) concentration of 3000 µmol/kg, in contrast with the untreated seawater controls (TA = 2300 µmol/kg).
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 Dryad (see Source) by the OA-SICC data curator. 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 2026-04-15.
Keyword(s):
Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Community composition and diversity; Entire community; Laboratory experiment; North Pacific; Pelagos; Primary production/Photosynthesis; Temperate
Related to:
Welch, Zoe S; Kim, Sylvia M; Liu, Michael; Bui, An; Grigolite, Jesse; Jones, Janice L; Iglesias-Rodríguez, M Débora (2025): Brucite-inspired ocean alkalinity enhancement alters the biogeochemistry and composition of a phytoplankton community: a Santa Barbara channel case report. Environmental Research Letters, 20(11), 114087, https://doi.org/10.1088/1748-9326/ae1752
Source:
Welch, Zoe S; Kim, Sylvia M; Liu, Michael; Bui, An; Grigolite, Jesse; Jones, Janice L; Iglesias-Rodriguez, Debora (2025): Data from: Brucite-inspired ocean alkalinity enhancement alters the biogeochemistry and composition of a phytoplankton community: A Santa Barbara channel case report [dataset]. Dryad, https://doi.org/10.5061/DRYAD.9CNP5HQVK
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: 34.300000 * Longitude: -119.800000
Date/Time Start: 2023-05-10T00:00:00 * Date/Time End: 2023-05-10T00:00:00
Event(s):
Santa_Barbara_channel_OAE * Latitude: 34.300000 * Longitude: -119.800000 * Date/Time: 2023-05-10T00:00:00 * Method/Device: Experiment (EXP)
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1Type of studyStudy typeWelch, Zoe S
2TreatmentTreatWelch, Zoe S
3ConditionCondWelch, Zoe S
4Day of experimentDOEdayWelch, Zoe S
5ReplicateReplWelch, Zoe S
6Biogenic silicabSiO2µmol/lWelch, Zoe S
7Carbon, organic, particulatePOCµmol/lWelch, Zoe S
8Nitrogen, organic, particulatePONµmol/lWelch, Zoe S
9Carbon, inorganic, particulatePICµmol/lWelch, Zoe S
10Carbon, organic, particulate/Nitrogen, organic, particulate ratioPOC/PONWelch, Zoe S
11Particulate inorganic carbon/particulate organic carbon ratioPIC/POCWelch, Zoe S
12Biogenic silica/Carbon, organic, particulatebSi/POCWelch, Zoe S
13CalciumCaµmol/lWelch, Zoe Sdissolved
14MagnesiumMgµmol/lWelch, Zoe Sdissolved
15Phosphate[PO4]3-µmol/lWelch, Zoe S
16SilicateSi(OH)4µmol/lWelch, Zoe S
17Nitrite[NO2]-µmol/lWelch, Zoe S
18Nitrate and Nitrite[NO3]- + [NO2]-µmol/lWelch, Zoe S
19Quantum yield efficiency of photosystem IIFv/FmWelch, Zoe S
20IndicatorIndicatorWelch, Zoe SFixArea, which is a proxy indicator for chlorophyll a content
21IdentificationIDWelch, Zoe S
22Cell densityCells#/mlWelch, Zoe S
23SalinitySalWelch, Zoe S
24Alkalinity, totalATµmol/kgWelch, Zoe S
25pH, total scalepHTWelch, Zoe Smeasured at temperature during carbonate chemistry anallysis
26Phosphate[PO4]3-µmol/kgWelch, Zoe S
27SilicateSi(OH)4µmol/kgWelch, Zoe S
28Temperature, waterTemp°CWelch, Zoe Sin Situ
29Temperature, waterTemp°CWelch, Zoe SduringCChemAnalysis
30pH, total scalepHTWelch, Zoe SCalculated using CO2SYS
31Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmWelch, Zoe SCalculated using CO2SYS
32Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmWelch, Zoe SCalculated using CO2SYS
33Bicarbonate ion[HCO3]-µmol/kgWelch, Zoe SCalculated using CO2SYS
34Carbonate ion[CO3]2-µmol/kgWelch, Zoe SCalculated using CO2SYS
35Carbon dioxideCO2µmol/kgWelch, Zoe SCalculated using CO2SYS
36Calcite saturation stateOmega CalWelch, Zoe SCalculated using CO2SYS
37Aragonite saturation stateOmega ArgWelch, Zoe SCalculated using CO2SYS
38Carbon, inorganic, dissolvedDICµmol/kgWelch, Zoe SCalculated using CO2SYS
39Carbonate system computation flagCSC flagYang, YanCalculated using seacarb after Nisumaa et al. (2010)
40Carbon dioxideCO2µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
41Fugacity of carbon dioxide (water) at sea surface temperature (wet air)fCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
42Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)pCO2water_SST_wetµatmYang, YanCalculated using seacarb after Nisumaa et al. (2010)
43Bicarbonate ion[HCO3]-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
44Carbonate ion[CO3]2-µmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
45Carbon, inorganic, dissolvedDICµmol/kgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
46Aragonite saturation stateOmega ArgYang, YanCalculated using seacarb after Nisumaa et al. (2010)
47Calcite 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:
8280 data points

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