Palau Coral 50 Year Stable Isotope Calibration Data Osborne, M.C.; Dunbar, R.B.; Mucciarone, D.A.; Sanchez-Cabeza, J.-A.; Druffel, E.R.M. Osborne, M.C. Dunbar, R.B. Mucciarone, D.A. Sanchez-Cabeza, J.-A. Druffel, E.R.M. Warm Pool earth science/paleoclimate/corals and sclerosponges (age,null,null,year Common Era,null,corals and sclerosponges,null,null,N,null) earth science/paleoclimate/corals and sclerosponges (delta 13C,Porites lutea,null,per mil VPDB,null,corals and sclerosponges,interpolated,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges (delta 18O,Porites lutea,null,per mil VPDB,null,corals and sclerosponges,interpolated,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges earth science/paleoclimate/corals and sclerosponges (Rock Islands>LATITUDE 7.2708>LONGITUDE 134.3837) (Ngeralang>LATITUDE 7.6569>LONGITUDE 134.5651) (Ngeragabel>LATITUDE 7.4064>LONGITUDE 134.4353) (Ulong Channel>LATITUDE 7.2859>LONGITUDE 134.2503) Stable isotopic and trace element records from corals collected within the West Pacific Warm Pool (WPWP) are well suited to examine interannual to decadal climate variability associated with the El Nino-Southern Oscillation (ENSO) phenomenon. The most commonly used climate recorder in corals is d18O (d18OCRL), a parameter subject to multiple regional and local environmental influences. Location-specific calibration of d18OCRL is a necessary first step for developing long-term paleoceanographic reconstructions. Here we present four new coral d18O stratigraphies from the Republic of Palau (7.5N 134.5E), and compare our records with instrumental measurements for the period 1950-2008. We also compare our results with a previously published coral record from Palau. We employ a new sea surface salinity (SSS) product and validate its utility for coral-based paleoclimate calibrations. We not only examine differences among the records but also identify strong and regionally coherent environmental signals. We find that SSS variability is the dominant influence on d18OCRL in Palau, while sea surface temperature (SST) is of secondary importance. Our results show that time-averaging multiple d18OCRL records into a single composite series produce greater correlations with instrumental data and indices than individual stratigraphies alone. Our results are consistent with observations of a strengthening of the hydrological cycle in the WPWP region over the past 50 years, though the magnitudes of long term linear trends differ among the different Palau d18OCRL records. Interannual and interdecadal variabilities between the Palau d18OCRL records are more consistent than the long term linear trends. Monthly Palauan d18OCRL anomalies capture strong El Nino events with high fidelity over the calibration period. This study provides constraints for future paleoenvironmental investigations in Palau using longer coral records. STUDY NOTES: Stable isotope (d18O and d13C) data for the past 50 years at monthly resolution from 4 coral cores collected in November 2008 from massive Porites lutea colonies at four sites in the Republic of Palau. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Osborne, M.C. Investigator : Dunbar, R.B. Investigator : Mucciarone, D.A. Investigator : Sanchez-Cabeza, J.-A. Investigator : Druffel, E.R.M. 2014-04-11 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/16338 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013ngb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013ri.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013uc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013nl.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013ngb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013ri.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013uc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013nl.txt English https://www.ncdc.noaa.gov/paleo/study/16338 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013ngb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013ri.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013uc.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013nl.txt Michael C. Osborne, Robert B. Dunbar, David A. Mucciarone, Joan-Albert Sanchez-Cabeza, Ellen Druffel2013Regional calibration of coral-based climate reconstructions from Palau, West Pacific Warm Pool (WPWP)Palaeogeography, Palaeoclimatology, Palaeoecology386308-32010.1016/j.palaeo.2013.06.001http://www.sciencedirect.com/science/article/pii/S0031018213002757 START YEAR: 1950 AD * END YEAR: 2008 AD 134.2503 7.2708 134.5651 7.6569