Oceanic forcing of interannual and multidecadal climate variability in the southwestern Indian Ocean: Evidence from a 160 year coral isotopic record (La Rï¿½union, 55E, 21S)

noaa-coral-1890 St. Gilles Reef - Oxygen Isotope Data Pfeiffer, M.; Timm, O.; Dullo, W.-C.; Podlech, S. St. Gilles Reef - Oxygen Isotope Data 2004-11-01 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/1890 Investigator M. Pfeiffer Investigator O. Timm Investigator W.-C. Dullo Investigator S. Podlech earth science paleoclimate corals and sclerosponges age,null,null,null,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,interpolated,isotope ratio mass spectrometry,N,null earth science paleoclimate corals and sclerosponges oxygen isotopes geoscientificInformation PAGES 2k Network PAGES Australasia 2k 1832 AD 1995 AD 118 cal yr BP -45 cal yr BP Complete -21.03 -21.03 55.25 55.25 -12 -12 Ocean Indian Ocean Reunion St. Gilles Reef>LATITUDE -21.03>LONGITUDE 55.25 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 Pfeiffer, M.; Timm, O.; Dullo, W.C.; Podlech, S 2004 Oceanic forcing of interannual and multidecadal climate variability in the southwestern Indian Ocean: Evidence from a 160 year coral isotopic record (La Rï¿½union, 55E, 21S) Paleoceanography 19 10.1029/2003PA000964

We have developed a new 163-year bimonthly coral d18O record from La Rï¿½union (55ï¿½E, 21ï¿½S). Interannual variations in coral d18O are coherent with the Southern Oscillation Index but not with regional sea surface temperature (SST). Correlations with the global SST field suggest more negative seawater d18O (d18Osw) during La Niï¿½a years. We propose that the signal results from changes in the strength of the South Equatorial Current and the Indonesian throughflow, which carry low salinity water. Multidecadal variations in coral d18O are coherent with regional SST, but the sign is of opposite sense as expected from the coral d18O-temperature relationship. This requires multidecadal changes in salinity large enough to overprint the SST contribution in the coral d18O record. Our results suggest that multidecadal salinity variations result from modulations in the transport of the South Equatorial Current, which varies in response to the surface wind field and/or the Indonesian throughflow.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/pfeiffer2004_noaa.txt USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11