# 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/palau2013nl.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: Ngeralang # Location: Ocean>Pacific Ocean>Western Pacific Ocean>Micronesia>Palau # Country: Republic of Palau # Northernmost_Latitude: 7.6569 # Southernmost_Latitude: 7.6569 # Easternmost_Longitude: 134.5651 # Westernmost_Longitude: 134.5651 # Elevation: m #------------------ # Data_Collection # Collection_Name: Palau2013NL # Earliest_Year: 1990 # 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 -2.020338058 -5.829329014 2008.08 -2.26247728 -5.891569318 2008.00 -2.301471017 -6.017959708 2007.92 -2.269033955 -6.004667701 2007.83 -2.254082918 -5.981219769 2007.75 -2.196278248 -5.923680196 2007.67 -2.444850452 -5.863382531 2007.58 -2.530148487 -5.817419453 2007.50 -2.527413368 -6.005130291 2007.42 -2.579777765 -5.883942611 2007.33 -2.500131329 -5.751371107 2007.25 -1.875691906 -5.930360076 2007.17 -2.065236092 -5.511250019 2007.08 -1.973538563 -5.553974289 2007.00 -2.175864765 -5.611259527 2006.92 -2.186145306 -5.584206581 2006.83 -2.362502007 -5.755419704 2006.75 -2.560565271 -5.817498152 2006.67 -2.466939449 -5.819311142 2006.58 -2.457236667 -5.7069324 2006.50 -2.087299658 -5.836156103 2006.42 -2.282745838 -5.750969887 2006.33 -2.36060828 -5.808024226 2006.25 -2.182200742 -5.758913101 2006.17 -2.141905308 -5.716764927 2006.08 -2.313740446 -5.830141214 2006.00 -2.714328586 -6.032971106 2005.92 -2.553681121 -6.1125711 2005.83 -2.504867525 -5.969268972 2005.75 -2.17806278 -5.778806202 2005.67 -2.013577743 -5.833659222 2005.58 -2.071697157 -5.8010696 2005.50 -2.181568626 -5.726147134 2005.42 -1.94324669 -5.750129965 2005.33 -1.871379505 -5.725811548 2005.25 -2.133348641 -5.862830975 2005.17 -1.83675015 -5.660167217 2005.08 -2.142185166 -5.903901848 2005.00 -2.254023361 -5.973608118 2004.92 -2.143804648 -5.942144482 2004.83 -1.993285335 -5.825362213 2004.75 -1.981778619 -5.792279138 2004.67 -2.133727059 -5.793447199 2004.58 -2.192336243 -5.945040202 2004.50 -1.776049779 -5.720037085 2004.42 -1.94540403 -5.687701507 2004.33 -1.739746196 -5.427375764 2004.25 -1.69542559 -5.603314482 2004.17 -1.665827751 -5.345585823 2004.08 -1.714792478 -5.612334712 2004.00 -1.915548086 -5.877508163 2003.92 -1.799776149 -5.641156163 2003.83 -1.998078108 -5.710996151 2003.75 -1.823684881 -5.767672857 2003.67 -1.815074444 -5.79998827 2003.58 -1.71810146 -5.769163358 2003.50 -1.825254679 -5.690924644 2003.42 -1.92108196 -5.698928244 2003.33 -1.61228919 -5.632555008 2003.25 -1.856625315 -5.709834173 2003.17 -1.914095521 -5.597130775 2003.08 -1.957017994 -5.620676149 2003.00 -2.170807123 -5.827504635 2002.92 -2.095373695 -5.729408905 2002.83 -1.979465246 -5.767371178 2002.75 -2.029133144 -5.71210357 2002.67 -2.164916754 -5.624662399 2002.58 -2.089473145 -5.753410024 2002.50 -1.897937059 -5.754957676 2002.42 -2.039662746 -5.629162823 2002.33 -1.81400311 -5.47962904 2002.25 -1.742264317 -5.550168066 2002.17 -1.630633116 -5.437551975 2002.08 -1.980898409 -5.444981658 2002.00 -1.863220498 -5.54575539 2001.92 -1.690390587 -5.635852814 2001.83 -1.535700234 -5.646957471 2001.75 -1.575520329 -5.710762176 2001.67 -1.879366517 -5.590900898 2001.58 -2.150376295 -5.751927048 2001.50 -2.115864407 -5.84795803 2001.42 -2.12453723 -5.770872593 2001.33 -1.812183691 -5.705670222 2001.25 -1.871427308 -5.506428836 2001.17 -1.936599255 -5.385606289 2001.08 -1.436771723 -5.47760728 2001.00 -1.789867902 -5.594377683 2000.92 -2.166056395 -5.739551067 2000.83 -2.048518176 -5.877597114 2000.75 -1.949734468 -5.840733732 2000.67 -1.874093175 -5.840182781 2000.58 -2.043519213 -5.900770749 2000.50 -2.213997684 -5.951916307 2000.42 -2.434556723 -5.832108498 2000.33 -2.063603319 -5.75594119 2000.25 -2.053748447 -5.716519509 2000.17 -1.657630861 -5.612821341 2000.08 -1.791501321 -5.664426576 2000.00 -1.998310158 -5.744678151 1999.92 -2.10124812 -5.919578809 1999.83 -1.969503367 -5.878528912 1999.75 -1.817068493 -5.88907382 1999.67 -1.761395037 -5.828901768 1999.58 -1.957597211 -5.902814006 1999.50 -1.621021865 -5.752702621 1999.42 -1.674364423 -5.745615724 1999.33 -1.741166858 -5.712096041 1999.25 -1.458993919 -5.558632025 1999.17 -1.275661856 -5.473714113 1999.08 -1.106534597 -5.504401483 1999.00 -1.151668299 -5.584392532 1998.92 -1.695428842 -5.811278566 1998.83 -1.237969976 -5.671189414 1998.75 -1.303684156 -5.798023502 1998.67 -1.300728177 -5.661380434 1998.58 -1.593100976 -5.775790971 1998.50 -1.539206676 -5.601824747 1998.42 -1.478285943 -5.427048498 1998.33 -1.579917012 -5.450309654 1998.25 -1.856634712 -5.562106058 1998.17 -1.35330379 -5.160754681 1998.08 -1.539912806 -5.278237772 1998.00 -1.871037316 -5.458220985 1997.92 -1.928520076 -5.565623674 1997.83 -1.902751569 -5.557755929 1997.75 -1.987178028 -5.488893307 1997.67 -1.946785808 -5.468360901 1997.58 -1.906181897 -5.55569931 1997.50 -1.994403569 -5.510401691 1997.42 -1.869165956 -5.500987658 1997.33 -1.73364003 -5.419004306 1997.25 -1.812857806 -5.154437021 1997.17 -1.57913363 -5.112277031 1997.08 -1.539741042 -5.231066401 1997.00 -1.371317596 -5.218027899 1996.92 -1.580364665 -5.46206739 1996.83 -1.607452792 -5.542793784 1996.75 -1.429417015 -5.471745615 1996.67 -1.623752475 -5.603250504 1996.58 -1.926072153 -5.534993438 1996.50 -1.678306572 -5.644298988 1996.42 -1.499979673 -5.64941769 1996.33 -1.500183899 -5.487926897 1996.25 -1.49650116 -5.435247271 1996.17 -1.355878949 -5.389312267 1996.08 -1.605266351 -5.446829762 1996.00 -1.604661465 -5.621246338 1995.92 -1.637070943 -5.760446205 1995.83 -1.540351272 -5.874202728 1995.75 -1.706772214 -5.943213081 1995.67 -1.36588943 -5.97675848 1995.58 -1.681583808 -5.963509774 1995.50 -1.381287098 -5.783531904 1995.42 -1.686510469 -5.864918508 1995.33 -1.58091259 -5.638159275 1995.25 -1.482490438 -5.596719814 1995.17 -1.655020356 -5.486265659 1995.08 -1.580433348 -5.751834807 1995.00 -1.821393843 -5.869401626 1994.92 -1.687229745 -5.784259766 1994.83 -1.734078334 -5.872147849 1994.75 -1.791019918 -5.87978503 1994.67 -1.569361329 -5.890361786 1994.58 -1.565457783 -5.862867958 1994.50 -1.695207907 -5.7871692 1994.42 -1.691549819 -5.61524371 1994.33 -1.734892429 -5.383305796 1994.25 -1.448276048 -5.382089275 1994.17 -1.390561461 -5.347333908 1994.08 -1.64549426 -5.448643886 1994.00 -1.576068213 -5.515463896 1993.92 -1.841905824 -5.632642052 1993.83 -1.620993908 -5.636954468 1993.75 -1.535522008 -5.580893631 1993.67 -1.721437702 -5.769731717 1993.58 -1.543148561 -5.727933776 1993.50 -1.588335736 -5.664887301 1993.42 -1.47480285 -5.714352 1993.33 -1.613346647 -5.64653703 1993.25 -1.374130211 -5.532920867 1993.17 -1.050070167 -5.356047153 1993.08 -1.402649891 -5.511842734 1993.00 -1.536113042 -5.673571367 1992.92 -1.653934717 -5.727540016 1992.83 -1.411355226 -5.699856869 1992.75 -1.829160024 -5.660621472 1992.67 -1.772547126 -5.609050274 1992.58 -1.869498661 -5.652886711 1992.50 -1.834774433 -5.780799143 1992.42 -1.631486833 -5.637319326 1992.33 -1.538753261 -5.538281783 1992.25 -1.688585547 -5.461511186 1992.17 -1.383067131 -5.28941679 1992.08 -1.503682741 -5.41718731 1992.00 -1.771678399 -5.385111269 1991.92 -1.711806774 -5.593893528 1991.83 -1.516116285 -5.641670702 1991.75 -1.537083724 -5.587260628 1991.67 -1.727506757 -5.57184124 1991.58 -1.768189888 -5.692743577 1991.50 -1.747973966 -5.660944821 1991.42 -1.718033433 -5.522727489 1991.33 -1.704846027 -5.434985948 1991.25 -1.372367094 -5.400744835 1991.17 -1.480432868 -5.275875092 1991.08 -1.711161024 -5.320279856 1991.00 -1.756824816 -5.448196938 1990.92 -1.786753742 -5.593068742 1990.83 -1.704989905 -5.678945609 1990.75 -1.868720141 -5.611390258 1990.67 -1.867369771 -5.681713307 1990.58 -1.840585822 -5.775200027 1990.50 -1.887682039 -5.76444259 1990.42 -1.67377985 -5.68192498 1990.33 -1.663895777 -5.385749356 1990.25 -1.621523315 -5.340341429 1990.17 -1.490992665 -5.261939049