Citation:

PANGAEA.993517

Name: Seawater carbonate chemistry and effects of ocean alkalinity enhancement on plankton in the Equatorial Pacific
Published: 2026-04-10
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Community composition and diversity; Entire community; Iron and steel slag; Laboratory experiment; North Pacific; Ocean alkalinity enhancement; Open ocean; Pelagos; Primary production/Photosynthesis; Silicates (e.g., olivine, basalt, wollastonite); Sodium hydroxide; South Pacific; Tropical

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Published: 2026-04-10 • DOI registered: 2026-05-09

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Abstract:

Here 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.

Keyword(s):

Bottles or small containers/Aquaria (<20 L); Coast and continental shelf; Community composition and diversity; Entire community; Iron and steel slag; Laboratory experiment; North Pacific; Ocean alkalinity enhancement; Open ocean; Pelagos; Primary production/Photosynthesis; Silicates (e.g., olivine, basalt, wollastonite); Sodium hydroxide; South Pacific; Tropical

Related to:

Guo, Jiaying A; Strzepek, Robert F; Yuan, Zhongwei; Swadling, Kerrie M; Townsend, Ashley T; Achterberg, Eric Pieter; Browning, Thomas J; Bach, Lennart Thomas (2025): Effects of ocean alkalinity enhancement on plankton in the Equatorial Pacific. Communications Earth & Environment, 6(1), 270, https://doi.org/10.1038/s43247-025-02248-7

Source:

Guo, Jiaying A; Bach, Lennart Thomas (2025): Supplementary Data for manuscript Effects of ocean alkalinity enhancement on plankton in the Equatorial Pacific [dataset]. figshare, https://doi.org/10.6084/M9.FIGSHARE.28578467.V1

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

Further details:

Guo, Jiaying A; Bach, Lennart Thomas (2024): SO298 Ocean Alkalinity Enhancement (OAE) Incubation [dataset]. Institute for Marine and Antarctic Studies, https://doi.org/10.25959/BMV8-1K07

Project(s):

Ocean Acidification International Coordination Centre (OA-ICC)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Type of study	Study type		Guo, Jiaying A
2	Experiment number	Exp no		Guo, Jiaying A
3	Treatment	Treat		Guo, Jiaying A
4	Salinity	Sal		Guo, Jiaying A
5	Temperature, water	Temp	°C	Guo, Jiaying A		Initial
6	Nitrogen oxide	NOx	µmol/l	Guo, Jiaying A		Initial
7	Phosphate	[PO4]3-	µmol/l	Guo, Jiaying A		Initial
8	Silicate	Si(OH)4	µmol/l	Guo, Jiaying A		Initial
9	pH, total scale	pHT		Guo, Jiaying A
10	pH, standard error	pH std e	±	Guo, Jiaying A		total scale
11	Alkalinity, total	AT	µmol/kg	Guo, Jiaying A
12	Alkalinity, total, standard error	AT std e	±	Guo, Jiaying A
13	Chlorophyll a	Chl a	µg/l	Guo, Jiaying A
14	Chlorophyll a, standard error	Chl a std e	±	Guo, Jiaying A
15	Maximum quantum yield of photosystem II	Fv/Fm		Guo, Jiaying A		apparent
16	Maximum photochemical quantum yield, standard error	Fv/Fm std e	±	Guo, Jiaying A		apparent
17	Bacteria, heterotrophic	HBA	#/ml	Guo, Jiaying A
18	Bacteria, heterotrophic, standard error	HBA std e	±	Guo, Jiaying A
19	Synechococcus	Synechococcus	#/ml	Guo, Jiaying A
20	Synechococcus, standard error	Synechococcus std e	±	Guo, Jiaying A
21	Prochlorococcus	Prochlorococcus	#/ml	Guo, Jiaying A
22	Prochlorococcus, standard error	Prochlorococcus std e	±	Guo, Jiaying A
23	Picoeukaryotes	PEuk	#/ml	Guo, Jiaying A
24	Picoeukaryotes, standard error	PEuk std e	±	Guo, Jiaying A
25	Nanoeukaryotes	NEuk	#/ml	Guo, Jiaying A
26	Nanoeukaryotes, standard error	NEuk std e	±	Guo, Jiaying A
27	Microeukaryotes	MEuk	#/ml	Guo, Jiaying A
28	Microeukaryotes, standard error	MEuk std e	±	Guo, Jiaying A
29	Microeukaryotes	MEuk	%	Guo, Jiaying A
30	Microeukaryotes, standard error	MEuk std e	±	Guo, Jiaying A		percentage
31	Nanoeukaryotes	NEuk	%	Guo, Jiaying A
32	Nanoeukaryotes, standard error	NEuk std e	±	Guo, Jiaying A
33	Picoeukaryotes	Peuk	%	Guo, Jiaying A
34	Picoeukaryotes, standard error	PEuk std e	±	Guo, Jiaying A
35	Prochlorococcus	Prochlorococcus	%	Guo, Jiaying A
36	Prochlorococcus, standard error	Prochlorococcus std e	±	Guo, Jiaying A
37	Synechococcus	Synechococcus	%	Guo, Jiaying A
38	Synechococcus, standard error	Synechococcus std e	±	Guo, Jiaying A
39	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
40	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
41	Fugacity of carbon dioxide (water) at sea surface temperature (wet air)	fCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
42	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
43	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
44	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
45	Carbon, inorganic, dissolved	DIC	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
46	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
47	Calcite saturation state	Omega Cal		Yang, Yan	Calculated 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:

3819 data points

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