Table 1 Carbonate chemistry parameters in the four experimental seawater pH treatments.

Parameters of carbonate seawater chemistry were calculated from total scale pH, total alkalinity (TA), temperature, and salinity using the open-access CO2SYS package (33) using constants from the study of Mehrbach et al. (34) as refit by Dickson and Millero (35). Values shown are means ± SD. pHT, pH in treatment tanks; Ωar, saturation state of aragonite.

Treatment namepHTTA
(mmol/kgSW)
pCO2
(μatm)
HCO3
(μmol/kgSW)
CO32−
(μmol/kgSW)
Total carbon
(μmol/kgSW)
Ωar
7.27.222496.623513.152384.1346.252528.270.72
±0.01±6.99±67.20±4.42±1.08±3.62±0.02
7.47.432474.162109.32299.4371.662429.861.11
±0.01±5.89±59.63±0.76±2.13±1.23±0.03
7.87.812461.77798.772082.22155.172259.642.41
±0.01±5.97±14.36±0.60±2.75±1.75±0.04
87.952447.48537.661951.14202.412168.533.14
±0.00±7.16±4.88±1.90±2.25±4.02±0.03