10.1594/PANGAEA.993517Guo, Jiaying AJiaying AGuoUniversity of TasmaniaStrzepek, Robert FRobert FStrzepek0000-0002-6442-7121University of TasmaniaYuan, ZhongweiZhongweiYuanGEOMAR - Helmholtz Centre for Ocean Research KielXiamen UniversitySwadling, Kerrie MKerrie MSwadling0000-0002-7620-841XUniversity of TasmaniaTownsend, Ashley TAshley TTownsend0000-0002-2972-2678University of TasmaniaAchterberg, Eric PieterEric PieterAchterberg0000-0002-3061-2767GEOMAR - Helmholtz Centre for Ocean Research KielBrowning, Thomas JThomas JBrowning0000-0002-2864-6087GEOMAR - Helmholtz Centre for Ocean Research KielBach, Lennart ThomasLennart ThomasBach0000-0003-0202-3671University of TasmaniaPANGAEA2026Bottles or small containers/Aquaria (<20 L)Coast and continental shelfCommunity composition and diversityEntire communityIron and steel slagLaboratory experimentNorth PacificOcean alkalinity enhancementOpen oceanPelagosPrimary production/PhotosynthesisSilicates (e.g., olivine, basalt, wollastonite)Sodium hydroxideSouth PacificTropicalType of studyExperiment numberTreatmentSalinityTemperature, waterNitrogen oxidePhosphateSilicatepH, total scalepH, standard errorAlkalinity, totalAlkalinity, total, standard errorChlorophyll aChlorophyll a, standard errorMaximum quantum yield of photosystem IIMaximum photochemical quantum yield, standard errorBacteria, heterotrophicBacteria, heterotrophic, standard errorSynechococcusSynechococcus, standard errorProchlorococcusProchlorococcus, standard errorPicoeukaryotesPicoeukaryotes, standard errorNanoeukaryotesNanoeukaryotes, standard errorMicroeukaryotesMicroeukaryotes, standard errorCarbonate system computation flagCarbon dioxideFugacity of carbon dioxide (water) at sea surface temperature (wet air)Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)Bicarbonate ionCarbonate ionCarbon, inorganic, dissolvedAragonite saturation stateCalcite saturation stateCalculated using seacarb after Nisumaa et al. (2010)Ocean Acidification International Coordination Centre (OA-ICC)Yang, YanYanYang0000-0003-4900-5606Dataset10.1038/s43247-025-02248-710.6084/M9.FIGSHARE.28578467.V110.5194/essd-2-167-201010.5194/essd-16-3771-202410.5194/essd-8-79-2016https://cran.r-project.org/web/packages/seacarb/index.html10.25959/BMV8-1K073819 data pointstext/tab-separated-valuesCreative Commons Attribution 4.0 InternationalHere we conducted 19 shipbased experiments in the Equatorial Pacific, examining three prevalent alkaline substances (sodium hydroxide, olivine, and steel slag) and their effects on natural phytoplankton populations under realistic and moderate alkalinity enhancements (16–29 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 figshare (see Source) by the OA-ICC 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 2026-04-09.