noaa-cave-14988 Espiritu Santo, Vanuatu 446 Year Stalagmite Oxygen Isotope Data Partin, J.W.; Quinn, T.M.; Shen, C.-C.; Emile-Geay, J.; Taylor, F.W.; Maupin, C.R.; Lin, K.; Jackson, C.S.; Banner, J.L.; Sinclair, D.J.; Huh, C.-A. Espiritu Santo, Vanuatu 446 Year Stalagmite Oxygen Isotope Data 2013-09-06 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/14988 Investigator J.W. Partin Investigator T.M. Quinn Investigator C.-C. Shen Investigator J. Emile-Geay Investigator F.W. Taylor Investigator C.R. Maupin Investigator K. Lin Investigator C.S. Jackson Investigator J.L. Banner Investigator D.J. Sinclair Investigator C.-A. Huh earth science paleoclimate speleothems depth,null,null,millimeter,null,speleothems,null,null,N,null earth science paleoclimate speleothems delta 13C,calcium carbonate,null,per mil PDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null earth science paleoclimate speleothems age,null,null,year Common Era,null,speleothems,null,null,N,null earth science paleoclimate speleothems age,null,95% confidence interval margin of error,year,null,speleothems,null,null,N,null earth science paleoclimate speleothems delta 18O,calcium carbonate,null,per mil PDB,null,speleothems,raw,isotope ratio mass spectrometry,N,null earth science paleoclimate speleothems carbon isotopes earth science paleoclimate speleothems oxygen isotopes geoscientificInformation Pacific Decadal Oscillation hydrology 1557 AD 2003 AD 393 cal yr BP -53 cal yr BP Complete -15.5333 -15.5333 167.0167 167.0167 230 230 Ocean Pacific Ocean South Pacific Ocean Melanesia Vanuatu Taurius Cave>LATITUDE -15.5333>LONGITUDE 167.0167 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 Partin, J.W., T.M. Quinn, C-C Shen, J. Emile-Geay, F.W. Taylor, C.R. Maupin, K. Lin, C.S. Jackson, J.L. Banner, D.J. Sinclair and C.-A. Huh 2013 Geology 41 11 10.1130/G34718.1 https://pubs.geoscienceworld.org/gsa/geology/article-abstract/41/11/1143/131033/multidecadal-rainfall-variability-in-south-pacific?redirectedFrom=fulltext

Pacific decadal variability (PDV) causes widespread, persistent fluctuations that affect climate, water resources, and fisheries throughout the Pacific basin, yet the magnitude, frequency, and causes of PDV remain poorly constrained. Here we present an absolutely dated, subannually resolved, 446 yr stable oxygen isotope (d18O) cave record of rainfall variability in Vanuatu (southern Pacific Ocean), a location that has a climate heavily influenced by the South Pacific Convergence Zone (SPCZ). The d18O-based proxy rainfall record is dominated by changes in stalagmite d18O that are large (~1 permil), quasi-periodic (~50 yr period), and generally abrupt (within 5-10 yr). These isotopic changes imply abrupt rainfall changes of as much as ~1.8 m per wet season, changes that can be ~2.5x larger than the 1976 C.E. shift in rainfall amount associated with a PDV phase switch. The Vanuatu record also shares little commonality with previously documented changes in the Intertropical Convergence Zone during the Little Ice Age or solar forcing. We conclude that multidecadal SPCZ variability is likely of an endogenous nature. Large, spontaneous, and low-frequency changes in SPCZ rainfall during the past 500 yr have important implications for the relative magnitude of natural PDV possible in the coming century. STUDY NOTES: Data include a table of U-Th ages and the d18O record from Taurius Cave on the island of Espiritu Santo (15º32’S, 167º01’E) in Vanuatu that spans ~450 years. The age model for the record is comprised of 31 U/Th Dates, and the top age is assumed to be circa 2005 (year of collection). The average temporal resolution for each d18O measurement is ~3 months/sample. The age model for the sample is based on a MATLAB program that fits piecewise quadratic splines to the U-Th dates. A Monte-Carlo approach is used to constructs alternative age models by allowing each U-Th date to vary according to a normal distribution with mean age (its best estimate) and standard deviation Sigma (its analytical uncertainty) over a 2sigma range. The spread in the alternate age models is a measure of the age uncertainty of each d18O measurement and is listed in the table with the d18O data for each measurement. The d18O data are reported with respect to PDB, and ages are reported as Year Common Era (Year C.E.). Depths without a d18O measurement are identified by NaN.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/speleothem/pacific/taurius2013.txt USA/NOAA DIF Version 9.8.4 2019-04-01 2019-04-01