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. 2012 Sep 11;160(8):1983–1993. doi: 10.1007/s00227-012-2056-9

Table 1.

Measured and calculated seawater carbonate system parameters for three experimental conditions used in this study

Parameter Experiment 1 Experiment 2—development Experiment 2—settlement assay Experiment 3
Control pH 7.6 Control pH 7.9 pH7.7 Control pH 7.9 pH 7.7 Control pH 7.9 pH 7.7 pH 7.5
pH (NBS) 8.17 (±0.02) 7.56 (±0.02) 8.05 (±0.05) 7.85 (±0.13) 7.65 (±0.09) 7.95 (±0.07) 7.83 (±0.02) 7.73 (±0.04) 8.14 (±0.03) 7.91 (±0.06) 7.70 (±0.07) 7.49 (±0.04)
Total alkalinity (mM Kg−1) 2,232 (±92) 2,229 (±31) 2,290 (±150) 2,286 (±87) 2,307 (±82) 2,241 (±130) 2,320 (±38) 2,274 (±43) 2,201 (±15) 2,203 (±40) 2,170 (±27) 2,224 (±34)
pCO2 (μatm) (calculated) 425.3 (±25) 2,035.8 (±124) 604.7 (±111) 1,015.9 (±317) 1,691.0 (±419) 769.7 (±167) 1,085.1 (±80) 1,367.0 (±153) 455.3 (±39) 838.9 (±134) 1,404.6 (±240) 2,407.0 (±256)
Ωar (calculated) 2.99 (±0.12) 0.86 (±0.05) 2.44 (±0.43) 1.63 (±0.58) 1.08 (±0.31) 1.96 (±0.43) 1.59 (±0.10) 1.26 (±0.14) 2.78 (±0.18) 1.78 (±0.26) 1.13 (±0.20) 0.74 (±0.04)

The partial pressure of carbon dioxide (pCO2) and aragonite saturation level (Ωar) was calculated from total alkalinity and pH using CO2SYS (Pierrot et al. 2006)