~1-2 months in any given year, no errors given for annual chronology

The geochemical age model was shifted within error of the 230Th dates (Table DR1) to match the timing of the 1578 CE El Ni�o event known from historical records (Ortlieb, 2000). The U-th dates have errors of 2-4 year for the fossil corals and the 20th century corals had U-Th erros of 3-5 years.

d18O (CO13HENG01A): interpretation4_scope: '' has been replaced by 'isotope'
d18O (CO13HENG02A): interpretation4_scope: '' has been replaced by 'isotope'
d18O (CO13HENG03A): interpretation4_scope: '' has been replaced by 'isotope'

Column 'addR2rJObuIl4ZTfaGxE', with variable name 'yearEnsemble', was added to the dataset
Column 'addR7syBMvnGge2fPrHc', with variable name 'yearEnsemble', was added to the dataset
Column 'addRkpghOsnf4xLzQ4sh', with variable name 'yearEnsemble', was added to the dataset
Column 'addRMF3pD1W4JyPZS5Xh', with variable name 'yearEnsemble', was added to the dataset
Column 'addRxCagEbWMeq17mwvK', with variable name 'yearEnsemble', was added to the dataset
Column 'addRzYsmxTaDfBPZ1yV4', with variable name 'yearEnsemble', was added to the dataset

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.

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

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.