Citation:

PANGAEA.994609

Name: Seawater carbonate chemistry and microbial ecosystem responses to alkalinity enhancement in the North Atlantic Subtropical Gyre
Published: 2026-05-13
License: https://creativecommons.org/licenses/by/4.0/
Keywords: Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Community composition and diversity; Entire community; Laboratory experiment; North Atlantic; Ocean alkalinity enhancement; Open ocean; Pelagos; Primary production/Photosynthesis; Temperate

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Published: 2026-05-13 • DOI registered: 2026-06-17

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Abstract:

We tested the ocean alkalinity enhancement response of two natural seawater mixed layer microbial communities in the North Atlantic Subtropical Gyre, one at the Western gyre boundary, and one in the middle of the gyre. We conducted 4-day microcosm incubation experiments at sea, spiked with three increasing amounts of alkaline sodium salts and a 13C-bicarbonate tracer at constant pCO2. We then measured a suite of dissolved and particulate parameters to constrain the chemical and biological response to these additions.

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 Github (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 2026-05-12.

Keyword(s):

Biomass/Abundance/Elemental composition; Bottles or small containers/Aquaria (<20 L); Calcification/Dissolution; Community composition and diversity; Entire community; Laboratory experiment; North Atlantic; Ocean alkalinity enhancement; Open ocean; Pelagos; Primary production/Photosynthesis; Temperate

Related to:

Subhas, Adam V; Marx, Lukas; Reynolds, Sarah; Flohr, Anita; Mawji, Edward W; Brown, Peter J; Cael, B B (2022): Microbial ecosystem responses to alkalinity enhancement in the North Atlantic Subtropical Gyre. Frontiers in Climate, 4, 784997, https://doi.org/10.3389/fclim.2022.784997

Source:

GitHub - bbcael/subhasetal · GitHub [webpage]. https://github.com/bbcael/subhasetal

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:

Median Latitude: 25.033300 * Median Longitude: -58.808300 * South-bound Latitude: 23.566600 * West-bound Longitude: -76.150000 * North-bound Latitude: 26.500000 * East-bound Longitude: -41.466600

Date/Time Start: 2020-01-25T00:05:00 * Date/Time End: 2020-02-29T00:01:45

Event(s):

Alkaline_Ocean_I * Latitude: 26.500000 * Longitude: -76.150000 * Date/Time Start: 2020-01-25T00:05:00 * Date/Time End: 2020-01-29T00:05:00 * Method/Device: Experiment (EXP)

Alkaline_Ocean_II * Latitude: 23.566600 * Longitude: -41.466600 * Date/Time Start: 2020-02-15T00:01:45 * Date/Time End: 2020-02-29T00:01:45 * Method/Device: Experiment (EXP)

Parameter(s):

#	Name	Short Name	Unit	Principal Investigator	Method/Device	Comment
1	Event label	Event		Subhas, Adam V
2	Type of study	Study type		Subhas, Adam V
3	Treatment	Treat		Subhas, Adam V
4	Time in hours	Time h	h	Subhas, Adam V
5	Experiment	Exp		Subhas, Adam V
6	Nitrate and Nitrite	[NO3]- + [NO2]-	µmol/kg	Subhas, Adam V
7	Nitrite	[NO2]-	µmol/kg	Subhas, Adam V
8	Phosphate	[PO4]3-	µmol/kg	Subhas, Adam V
9	Silicate	Si(OH)4	µmol/kg	Subhas, Adam V
10	Synechococcus	Synechococcus	#/ml	Subhas, Adam V
11	Prochlorococcus	Prochlorococcus	#/ml	Subhas, Adam V
12	Picoeukaryotes	PEuk	#/ml	Subhas, Adam V
13	Low nucleic acid bacteria	LNA	#/ml	Subhas, Adam V
14	High nucleic acid bacteria	HNA	#/ml	Subhas, Adam V
15	Bacteria	Bact	#/ml	Subhas, Adam V		total
16	Particle distribution exponent	PSD exponent		Subhas, Adam V
17	Particle distribution exponent, standard deviation	PSD exponent std dev	±	Subhas, Adam V
18	Volume, filter	Vol filter	l	Subhas, Adam V
19	Carbon, total particulate	TPC	µmol/kg	Subhas, Adam V
20	Carbon, inorganic, particulate	PIC	µmol/kg	Subhas, Adam V
21	Nitrogen, total particulate	TPN	µmol/kg	Subhas, Adam V
22	Calcium carbonate/Total carbon ratio	CaCO3/TC		Subhas, Adam V		Fraction of total carbon as calcium carbonate
23	δ13C, total particulate carbon	δ13C TPC	‰ PDB	Subhas, Adam V
24	Net primary production of carbon	NPP C	µmol/kg/day	Subhas, Adam V
25	Alkalinity, total	AT	µmol/kg	Subhas, Adam V
26	Carbon, inorganic, dissolved	DIC	µmol/kg	Subhas, Adam V
27	Calcite saturation state	Omega Cal		Subhas, Adam V
28	Partial pressure of carbon dioxide (water) at sea surface temperature (wet air)	pCO2water_SST_wet	µatm	Subhas, Adam V
29	pH, total scale	pHT		Subhas, Adam V
30	Temperature, water	Temp	°C	Subhas, Adam V
31	Salinity	Sal		Subhas, Adam V
32	Carbonate system computation flag	CSC flag		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
33	pH, total scale	pHT		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
34	Carbon dioxide	CO2	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
35	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)
36	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)
37	Bicarbonate ion	[HCO3]-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
38	Carbonate ion	[CO3]2-	µmol/kg	Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
39	Aragonite saturation state	Omega Arg		Yang, Yan	Calculated using seacarb after Nisumaa et al. (2010)
40	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:

1224 data points

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