noaa-coral-16338 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. Palau Coral 50 Year Stable Isotope Calibration Data 2014-04-11 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/16338 Investigator M.C. Osborne Investigator R.B. Dunbar Investigator D.A. Mucciarone Investigator J.-A. Sanchez-Cabeza Investigator E.R.M. Druffel 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 oxygen isotopes earth science paleoclimate corals and sclerosponges carbon isotopes geoscientificInformation Warm Pool 1950 AD 2008 AD 0 cal yr BP -58 cal yr BP Complete 7.2708 7.6569 134.2503 134.5651 Ocean Pacific Ocean Western Pacific Ocean Micronesia Palau Rock Islands>LATITUDE 7.2708>LONGITUDE 134.3837 Ocean Pacific Ocean Western Pacific Ocean Micronesia Palau Ngeralang>LATITUDE 7.6569>LONGITUDE 134.5651 Ocean Pacific Ocean Western Pacific Ocean Micronesia Palau Ngeragabel>LATITUDE 7.4064>LONGITUDE 134.4353 Ocean Pacific Ocean Western Pacific Ocean Micronesia Palau Ulong Channel>LATITUDE 7.2859>LONGITUDE 134.2503 None Please cite original publication, online resource, dataset and publication DOIs (where available), and date accessed when using downloaded data. If there is no publication information, please cite investigator, title, online resource, and date accessed. The appearance of external links associated with a dataset does not constitute endorsement by the Department of Commerce/National Oceanic and Atmospheric Administration of external Web sites or the information, products or services contained therein. For other than authorized activities, the Department of Commerce/NOAA does not exercise any editorial control over the information you may find at these locations. These links are provided consistent with the stated purpose of this Department of Commerce/NOAA Web site. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Michael C. Osborne, Robert B. Dunbar, David A. Mucciarone, Joan-Albert Sanchez-Cabeza, Ellen Druffel 2013 Palaeogeography, Palaeoclimatology, Palaeoecology 386 308-320 10.1016/j.palaeo.2013.06.001 http://www.sciencedirect.com/science/article/pii/S0031018213002757

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.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013ngb.txt Data File; Ngeragabel Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013ri.txt Data File; Rock Islands Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013uc.txt Data File; Ulong Channel Stable Isotope Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013nl.txt Data File; Ngeralang Stable Isotope Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11