Max 17.27 mm/year; min 7.87 mm/year; average 12.34 mm/year. Extension rate calculated between density troughs for alternate slice of PET12 by A. Arzey.

SrCa maxima (minima) was matched to weekly averaged Reyn-Smith OISST v2 minima (maxima) for archived age model. Ellis et al. (2019) matched SrCa maxima to SST (OISST v2) minima in August and interpolated for the period summer 1990 to summer 2012 and was cross-checked using growth bands and luminescence.

Ablation using a rectangular sample area with a 40 × 400 μm resolution at a speed of 40 μm per second. NIST 614 and in-house pressed coral standards. The Ellis et al. (2019) data was smoothed with a 10-point running mean and was further smoothed with a 10-point mean for archiving in the GBRCD. SEM diagenesis check was on an alternate slice of PET12.

Varian 820-MS quadruple ICP-MS equipped with an ArF excimer laser (193 nm) ablation system

Ablation using a rectangular sample area with a 40 × 400 μm resolution at a speed of 40 μm per second. NIST 614 and in-house pressed coral standards. Ba138Ca calibrated against coral standard. The Ellis et al. (2019) data was smoothed with a 10-point running mean and was further smoothed with a 10-point mean for archiving in the GBRCD. SEM diagenesis check was on an alternate slice of PET12.

Ablation using a rectangular sample area with a 40 × 400 μm resolution at a speed of 40 μm per second. NIST 614 and in-house pressed coral standards. BaCa calibrated against coral standard. The Ellis et al. (2019) data was smoothed with a 10-point running mean and was further smoothed with a 10-point mean for archiving in the GBRCD. SEM diagenesis check was on an alternate slice of PET12.

Ablation using a rectangular sample area with a 40 × 400 μm resolution at a speed of 40 μm per second. NIST 614 and in-house pressed coral standards. BCa calibrated against coral standard. The Ellis et al. (2019) data was smoothed with a 10-point running mean and was further smoothed with a 10-point mean for archiving in the GBRCD. SEM diagenesis check was on an alternate slice of PET12.