Early mid-Holocene SST variability and surface-ocean water balance in the southwest Pacific Duprey, N.; Lazareth, C.E.; Corrège, T.; Le Cornec, F.; Maes, C.; Pujol, N.; Madeng-Yogo, M.; Caquineau, S.; Soares Derome, C.; Cabioch, G. Duprey, N. Lazareth, C.E. Corrège, T. Le Cornec, F. Maes, C. Pujol, N. Madeng-Yogo, M. Caquineau, S. Soares Derome, C. Cabioch, G. ENSO earth science/paleoclimate/corals and sclerosponges (magnesium/calcium,Porites sp.,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges (barium/calcium,Porites sp.,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges (boron/calcium,Porites sp.,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,null) earth science/paleoclimate/paleoceanography (depth,null,null,millimeter,null,paleoceanography,null,null,N,distance from edge of shell) earth science/paleoclimate/climate reconstructions|corals and sclerosponges (delta 18O,delta 18O|sea water|strontium/calcium,null,per mil VPDB,monthly,climate reconstructions|corals and sclerosponges,null,null,N,calibration equation: Juillet-Leclerc and Schmidt (2001)) earth science/paleoclimate/corals and sclerosponges (strontium/calcium,Porites sp.,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,N,null) earth science/paleoclimate/climate reconstructions|corals and sclerosponges (age,null,null,year,null,climate reconstructions|corals and sclerosponges,null,null,N,null) earth science/paleoclimate/corals and sclerosponges (uranium/calcium,Porites sp.,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma mass spectrometry,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/paleoceanography (delta 18O,bivalve,null,per mil VPDB,null,paleoceanography,null,isotope ratio mass spectrometry,N,Tridacna maxima) earth science/paleoclimate/corals and sclerosponges earth science/paleoclimate/corals and sclerosponges (Fausse Passe de Uitoé reef>LATITUDE -22.28>LONGITUDE 166.98) (Southeast Espiritu Santo Island>LATITUDE -15.35>LONGITUDE 167.18) (Epi Island>LATITUDE -16.75>LONGITUDE 168.1) We present early mid-Holocene records of Sr/Ca, d18O and d18Osw from marine archives collected in Vanuatu: two Porites sp. corals (6.7-6.5 ka BP) and a Tridacna maxima giant clam (6.2-6.0 ka BP). Sr/Ca, d18O, and d18Osw were used as proxies for sea surface temperature (SST) and sea surface salinity (SSS). The fossil geochemical records were compared to modern Porites sp. and T. maxima records. Reconstructed mean SSTs from the two fossil Porites sp. and from the modern coral are similar, implying that the Western Pacific Warm Pool (WPWP)' southern edge had reached its modern location by 6.7-6.5 ka BP. The post-glacial SST rise in the Southwest Pacific was thus completed by the early mid-Holocene. The two early mid-Holocene corals and the giant clam recorded saltier conditions than modern related to 1) a decoupling between the precipitation regime and the SPCZ due to a northerly position of this climatic feature and 2) an increase of the moisture transport to the extra-tropics, driven by a strengthened or extended Hadley cell. The longest d18O coral profile displays an El Niño Southern Oscillation (ENSO) signal reduced by 20-30% compared to the period 1928-1992, in concordance with the reduced ENSO variability observed in the Pacific area during the first half of the Holocene. However, the decoupling between the SPCZ and the precipitation regime may have also contributed to the weak ENSO signal recorded in the early mid-Holocene coral d18O profile. STUDY NOTES: This study contains the data from the giant clam samples: T-10-09 and T-02-08 and the Porites samples: VA-EPI; Psp0609; and Psp0709. The analytical precision (1σ) on oxygen isotopic determinations, based on 10 runs of the reference material NBS-19, was 0.08‰ vpdb. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Duprey, N. Investigator : Lazareth, C.E. Investigator : Corrège, T. Investigator : Le Cornec, F. Investigator : Maes, C. Investigator : Pujol, N. Investigator : Madeng-Yogo, M. Investigator : Caquineau, S. Investigator : Soares Derome, C. Investigator : Cabioch, G. 2014-01-27 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/15977 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-t0208.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-psp0609.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-va-epi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-t1009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-psp0709.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-t0208.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-psp0609.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-va-epi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-t1009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-psp0709.txt English https://www.ncdc.noaa.gov/paleo/study/15977 https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-t0208.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-psp0609.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-va-epi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-t1009.txt https://www1.ncdc.noaa.gov/pub/data/paleo/contributions_by_author/duprey2012/duprey2012-psp0709.txt Duprey, N., C.E. Lazareth, T. Corrège, F. Le Cornec, C. Maes, N. Pujol, M. Madeng-Yogo, S. Caquineau, C. Soares Derome, and G. Cabioch2012Early mid-Holocene SST variability and surface-ocean water balance in the southwest PacificPaleoceanography27PA420710.1029/2012PA002350 START YEAR: 1999 AD * END YEAR: 2006 AD 166.98 -22.28 168.1 -15.35