Hereid, K. A., Quinn, T. M., Taylor, F. W., Shen, C.-C., Lawrence Edwards, R. and Cheng, H.: Coral record of reduced El Nino activity in the early 15th to middle 17th centuries, Geology, 41(1), 51–54, doi:10.1130/g33510.1, 2012.

Sr/Ca data to monthly SST from the 2i¿½ i¿½ 2i¿½ grid square centered on 4i¿½N, 172i¿½E from the extended reconstructed SST version 3b (ERSSTv3b) data product [Smith et al., 2008; ttp://www.esrl.noaa.gov/psd] [?] Annual Sr/Ca maxima were tied to the coolest points in the SST record using Analyseries [Paillard et al., 1996]. The resulting spacing of Sr/Ca data remained relatively constant throughout the record, and the chronology was verified against growth band counts from the X-radiograph. After converting depth to time in Analyseries, Sr/Ca were interpolated to six equally spaced samples per year using ARAND time series analysis software [Howell, 2001], corresponding  to bimonthly resolution for the length of the record.

Finnigan MAT 251 mass spectrometer with Kiel Carbonate Device, arian Vista-PRO Simultaneous ICP-OES

0.04permil (1sigma) for d18O, 0.011 mmol/mol (1sigma) for Sr/Ca

coral-based d18Osw is poorly correlated to local rainfall, and likely reflects ocean advection

Sr/Ca data to monthly SST from the 2� � 2� grid square centered on 4�N, 172�E from the extended reconstructed SST version 3b (ERSSTv3b) data product [Smith et al., 2008; ttp://www.esrl.noaa.gov/psd] [?] Annual Sr/Ca maxima were tied to the coolest points in the SST record using Analyseries [Paillard et al., 1996]. The resulting spacing of Sr/Ca data remained relatively constant throughout the record, and the chronology was verified against growth band counts from the X-radiograph. After converting depth to time in Analyseries, Sr/Ca were interpolated to six equally spaced samples per year using ARAND time series analysis software [Howell, 2001], corresponding  to bimonthly resolution for the length of the record.

d18Osw derived using centering method described in Cahyarini et al., 2008, with Sr/Ca-SST slope of -0.084 mmol/mol/?C and d18O-SST slope of -0.22 ?/?C