noaa-coral-25270 Ta'u, American Samoa Coral d18O Data from 1520-2011 CE Tangri, N.; Dunbar, R.B.; Linsley, B.K.; Mucciarone, D.M. Ta'u, American Samoa Coral d18O Data from 1520-2011 CE 2018-09-27 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/25270 Investigator N. Tangri Investigator R.B. Dunbar Investigator B.K. Linsley Investigator D.M. Mucciarone 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 18O,Porites sp.,null,per mil VPDB,null,corals and sclerosponges,corrected|interpolated,isotope ratio mass spectrometry,N,interpolated linearly to monthly time steps earth science paleoclimate corals and sclerosponges oxygen isotopes geoscientificInformation 1520 AD 2011 AD 430 cal yr BP -61 cal yr BP Complete -14.27 -14.27 -169.5 -169.5 Ocean Pacific Ocean Central Pacific Ocean American Samoa Ta'u, American Samoa>LATITUDE -14.27>LONGITUDE -169.5 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 Tangri, N, R.B. Dunbar, B.K. Linsley, and D.M. Mucciarone 2018 Paleoceanography and Paleoclimatology 33 10.1029/2017PA003310

A 492-year long, continuous d18O time series from a massive Porites coral colony in Ta'u, American Samoa, records contrasting responses to different types of ENSO (El Niño-Southern Oscillation) through a mixed sea surface temperature (SST) and salinity signal. Currently, conventional El Niño (La Niña) events generate cold and salty (warm and fresh) anomalies at Ta'u, while Modoki El Niño (La Niña) events warm (cool) the waters at Ta'u. Over the course of the 20th century, the Ta'u d18O record underwent a polarity shift in its response to conventional ENSO: a warm and fresh (cool and salty) response to El Niño (La Niña) was replaced by the opposite pattern. We interpret this as evidence for the movement of the Eastern Pacific ENSO null zone, the narrow band of the surface ocean where SST variability is not on average correlated with ENSO. This movement appears to be related to overall shrinking of the ENSO footprint over the 20th century. We infer no such trend in the Modoki footprint. The five century long Ta'u record shows dramatic, century-scale changes in ENSO-band variability. Comparisons with other ENSO reconstructions lead to conflicting interpretations: the Ta'u coral may have recorded changes in the strength of ENSO or in its spatial footprint. Changes in the spatial footprint manifest as a changing sensitivity to ENSO at any given location, presenting challenges to established methods of ENSO reconstruction. STUDY NOTES: This is the d18O data from the Tau-1 core, linearly interpolated to monthly basis. Dates are reported as decimal years AD.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/central_pacific/tangri2018/tangri2018.txt NOAA Template File; Ta'u, American Samoa d18O Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11