PANGAEA_993632 Seawater carbonate chemistry and biogeochemistry and composition of a phytoplankton community Welch, Zoe S; Kim, Sylvia M; Liu, Michael; Bui, An; Grigolite, Jesse; Jones, Janice L; Iglesias-Rodríguez, M Débora Seawater carbonate chemistry and biogeochemistry and composition of a phytoplankton community 2026-04-15 PANGAEA Dataset https://doi.pangaea.de/10.1594/PANGAEA.993632 Investigator Zoe S Welch zoe.welch@lifesci.ucsb.edu Investigator Yan Yang yangyan@xmu.edu.cn Earth Science Type of study Treatment Condition Day of experiment Replicate Biogenic silica Carbon, organic, particulate Nitrogen, organic, particulate Carbon, inorganic, particulate Carbon, organic, particulate/Nitrogen, organic, particulate ratio Particulate inorganic carbon/particulate organic carbon ratio Biogenic silica/Carbon, organic, particulate Calcium Magnesium Phosphate Silicate Nitrite Nitrate and Nitrite Quantum yield efficiency of photosystem II Indicator Identification Cell density Salinity Alkalinity, total pH, total scale Phosphate Silicate Temperature, water Fugacity of carbon dioxide (water) at sea surface temperature (wet air) Partial pressure of carbon dioxide (water) at sea surface temperature (wet air) Bicarbonate ion Carbonate ion Carbon dioxide Calcite saturation state Aragonite saturation state Carbon, inorganic, dissolved Carbonate system computation flag geoscientificInformation Biomass/Abundance/Elemental composition Bottles or small containers/Aquaria (<20 L) Coast and continental shelf Community composition and diversity Entire community Experiment Laboratory experiment North Pacific Pelagos Primary production/Photosynthesis Santa_Barbara_channel_OAE Temperate Calculated using CO2SYS Calculated using seacarb after Nisumaa et al. (2010) 2023-05-10 2023-05-10 Complete 34.3 34.3 -119.8 -119.8 OA-ICC Ocean Acidification International Coordination Centre unrestricted CC-BY-4.0: Creative Commons Attribution 4.0 International English PANGAEA Data Publisher for Earth & Environmental Science https://www.pangaea.de/ Data Center Contact Michael Diepenbroek info@pangaea.de

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Bremen Bremen 28359 Germany online 8280 data points text/tab-separated-values 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 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 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 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

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. ** For all details see the full metadata description at "https://doi.pangaea.de/10.1594/PANGAEA.993632"!

http://mel.xmu.edu.cn/en/ https://cran.r-project.org/web/packages/seacarb/index.html seacarb: seawater carbonate chemistry with R. R package version 3.3.3 https://doi.org/10.1088/1748-9326/ae1752 Brucite-inspired ocean alkalinity enhancement alters the biogeochemistry and composition of a phytoplankton community: a Santa Barbara channel case report https://doi.org/10.5061/DRYAD.9CNP5HQVK Data from: Brucite-inspired ocean alkalinity enhancement alters the biogeochemistry and composition of a phytoplankton community: A Santa Barbara channel case report https://doi.org/10.5194/essd-16-3771-2024 An update of data compilation on the biological response to ocean acidification and overview of the OA-ICC data portal https://doi.org/10.5194/essd-2-167-2010 Calculated using seacarb after Nisumaa et al. (2010) https://doi.org/10.5194/essd-2-167-2010 EPOCA/EUR-OCEANS data compilation on the biological and biogeochemical responses to ocean acidification https://doi.org/10.5194/essd-8-79-2016 Data compilation on the biological response to ocean acidification: an update https://www.iaea.org/services/oa-icc/science-and-collaboration/data-access-and-management OA-ICC DIF 9.4 2026-04-15 2026-04-15