Fig. 1: Summary of the solution conditions and precipitation rates in the synthetic aragonite experiments.

a solution conditions and b aragonite precipitation rates (R) in 25 °C experiments, and c solution conditions and d aragonite precipitation rates at variable temperature. Typical errors in pH. ΩAr, temperature within each precipitation is estimated to be 0.003 pH units, 0.04 to 0.16 ΩAr, and 0.04 °C, while the error in precipitation rate is estimated to be ~3% (see methods). In all cases, these errors are smaller than the symbols used.