# Palau Coral 50 Year Stable Isotope Calibration Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # # Online_Resource: http://hurricane.ncdc.noaa.gov/pls/paleox/f?p=519:1:::::P1_STUDY_ID:16338 # # Original_Source_URL: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/coral/west_pacific/palau2013uc.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Corals and Sclerosponges #-------------------- # Contribution_Date # Date: 2014-04-11 #-------------------- # Title # Study_Name: Palau Coral 50 Year Stable Isotope Calibration Data #-------------------- # Investigators # Investigators: Osborne, M.C.; Dunbar, R.B.; Mucciarone, D.A.; Sanchez-Cabeza, J.-A.; Druffel, E. #-------------------- # Description_and_Notes # Description: 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. #-------------------- # Publication # Authors: Michael C. Osborne, Robert B. Dunbar, David A. Mucciarone, Joan-Albert Sanchez-Cabeza, Ellen Druffel # Published_Date_or_Year: 2013-09-15 # Published_Title: Regional calibration of coral-based climate reconstructions from Palau, West Pacific Warm Pool (WPWP) # Journal_Name: Palaeogeography, Palaeoclimatology, Palaeoecology # Volume: 386 # Edition: # Issue: # Pages: 308-320 # DOI: 10.1016/j.palaeo.2013.06.001 # Online_Resource: http://www.sciencedirect.com/science/article/pii/S0031018213002757 # Full_Citation: # Abstract: 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. #------------------ # Funding_Agency # Funding_Agency_Name: IAEA # Grant: Project "Nuclear and isotopic studies of the El Nino phenomenon in the ocean" #------------------ # Funding_Agency # Funding_Agency_Name: U.S. National Science Foundation # Grant: OCE-0941199 #------------------ # Site_Information # Site_Name: Ulong Channel # Location: Ocean>Pacific Ocean>Western Pacific Ocean>Micronesia>Palau # Country: Republic of Palau # Northernmost_Latitude: 7.2859 # Southernmost_Latitude: 7.2859 # Easternmost_Longitude: 134.2503 # Westernmost_Longitude: 134.2503 # Elevation: m #------------------ # Data_Collection # Collection_Name: Palau2013UC # Earliest_Year: 1950 # Most_Recent_Year: 2008 # Time_Unit: AD # Core_Length: m # Notes: #------------------ # Chronology: # # # # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ##age_AD age, , , AD, , , , ,N ##d13Cporite delta13C, porites, , per mil VPDB, ,coral, , ,N ##d18Oporite delta18O, porites, , per mil VPDB, ,coral, , ,N # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # age_AD d13Cporite d18Oporite 2008.17 -2.063991308 -5.752456665 2008.08 -1.629162218 -5.692817115 2008.00 -1.701547816 -5.832488606 2007.92 -2.010947652 -5.77520998 2007.83 -2.168117442 -5.713674992 2007.75 -2.225017247 -5.781509217 2007.67 -2.511326551 -5.73789978 2007.58 -2.604205339 -5.806237204 2007.50 -2.528990802 -5.764403632 2007.42 -2.167838465 -5.649990156 2007.33 -1.947107862 -5.592850547 2007.25 -2.191868994 -5.593779942 2007.17 -2.394159555 -5.574477673 2007.08 -2.542371153 -5.750553838 2007.00 -2.764388543 -5.8089229 2006.92 -2.766944918 -5.917266738 2006.83 -2.433515435 -5.764923783 2006.75 -2.311298252 -5.689954113 2006.67 -2.323801612 -5.78039311 2006.58 -2.408471258 -5.802997607 2006.50 -2.502285965 -5.860697563 2006.42 -2.93539633 -5.949475676 2006.33 -2.887398359 -5.885891724 2006.25 -2.643208718 -5.788957751 2006.17 -2.243311882 -5.718400955 2006.08 -2.17084559 -5.740480915 2006.00 -2.531433563 -5.712187159 2005.92 -2.542721022 -5.860806807 2005.83 -2.811960697 -5.987896442 2005.75 -2.813839613 -6.009567392 2005.67 -2.532934371 -5.912154145 2005.58 -3.006468783 -5.844433284 2005.50 -2.341126561 -5.697225809 2005.42 -2.580990262 -5.898660434 2005.33 -2.252680205 -5.742119388 2005.25 -2.181013132 -5.694551206 2005.17 -2.232562065 -5.562185287 2005.08 -2.513832565 -5.612494703 2005.00 -2.774360317 -5.692324227 2004.92 -2.679366115 -5.888669011 2004.83 -2.388009895 -5.88234634 2004.75 -2.364346067 -5.826717564 2004.67 -2.289524662 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-5.787250343 1999.67 -2.723213062 -5.863896705 1999.58 -2.313370089 -5.869679566 1999.50 -2.010313511 -5.788834572 1999.42 -2.130476446 -5.862810779 1999.33 -2.317962593 -5.895064884 1999.25 -2.358116172 -5.836011101 1999.17 -2.240271091 -5.810585499 1999.08 -1.78106622 -5.62195324 1999.00 -1.814247957 -5.238473362 1998.92 -3.065061297 -5.524926586 1998.83 -2.460693373 -5.686443425 1998.75 -2.291663214 -5.724714618 1998.67 -2.650706082 -5.68232952 1998.58 -2.366651666 -5.551225704 1998.50 -2.101565204 -5.399754311 1998.42 -1.979524041 -5.300073834 1998.33 -2.295366877 -5.430024334 1998.25 -2.457287608 -5.340768519 1998.17 -2.192338467 -5.258135319 1998.08 -2.40014566 -5.562928065 1998.00 -2.505272351 -5.598996643 1997.92 -2.494297385 -5.694510327 1997.83 -2.264517307 -5.627164364 1997.75 -2.227703433 -5.618414715 1997.67 -2.32590174 -5.654469951 1997.58 -2.475889821 -5.63588298 1997.50 -2.589408875 -5.728484631 1997.42 -1.966134125 -5.702578805 1997.33 -2.106935609 -5.656525343 1997.25 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-5.866924032 1994.75 -2.128587205 -5.644736516 1994.67 -2.321205854 -5.715831757 1994.58 -2.549478946 -5.895649732 1994.50 -2.99071767 -5.919460607 1994.42 -2.592489004 -5.846178532 1994.33 -2.757143944 -5.747731829 1994.25 -2.540609363 -5.635093163 1994.17 -2.291594982 -5.558455467 1994.08 -2.242499548 -5.689529557 1994.00 -2.404976961 -5.675045415 1993.92 -2.735770464 -5.830109119 1993.83 -2.545242983 -5.713290941 1993.75 -2.372562211 -5.788107186 1993.67 -2.4780581 -5.860284328 1993.58 -2.733666969 -5.658453522 1993.50 -2.792436399 -5.792868991 1993.42 -2.880081415 -5.839360237 1993.33 -2.291013893 -5.700554933 1993.25 -2.450456723 -5.525761645 1993.17 -2.560020685 -5.478780746 1993.08 -2.541708449 -5.498874857 1993.00 -2.56571125 -5.497940493 1992.92 -2.66694434 -5.660277888 1992.83 -2.465408574 -5.600259203 1992.75 -2.850003668 -5.675316902 1992.67 -2.261697022 -5.626285559 1992.58 -2.623078081 -5.774718461 1992.50 -2.790919784 -5.776935749 1992.42 -2.811738863 -5.775047005 1992.33 -2.726265806 -5.673961203 1992.25 -2.401516783 -5.432254298 1992.17 -2.356372356 -5.308886766 1992.08 -2.397399036 -5.469349684 1992.00 -2.411078898 -5.482635635 1991.92 -2.634958506 -5.667140484 1991.83 -2.120100621 -5.619957343 1991.75 -2.184823939 -5.69218738 1991.67 -2.536631584 -5.658203125 1991.58 -2.593644751 -5.804207398 1991.50 -2.778105813 -5.851989993 1991.42 -2.562705278 -5.868749142 1991.33 -2.481535851 -5.595770139 1991.25 -2.248670242 -5.427755579 1991.17 -2.310131788 -5.344977856 1991.08 -2.772410355 -5.385263256 1991.00 -2.641017437 -5.690134525 1990.92 -2.492495936 -5.622703156 1990.83 -2.357154369 -6.005946159 1990.75 -2.603670666 -5.786808712 1990.67 -2.558242798 -5.821787357 1990.58 -2.49676668 -5.763605806 1990.50 -2.658180833 -5.733475447 1990.42 -2.647907388 -5.784025281 1990.33 -1.889477491 -5.629793644 1990.25 -2.302771359 -5.564799173 1990.17 -1.918933034 -5.503617764 1990.08 -1.767131641 -5.638351772 1990.00 -2.213909362 -5.754566086 1989.92 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