Urvina Bay Radiocarbon and Oxygen Isotope Data for 1939-1954 Druffel, E.R.M.; Griffin, S.M.; Glynn, D.S.; Dunbar, R.B.; Mucciarone, D.A.; Toggweiler, J.R. Druffel, E.R.M. Griffin, S.M. Glynn, D.S. Dunbar, R.B. Mucciarone, D.A. Toggweiler, J.R. earth science/paleoclimate/corals and sclerosponges (delta 13C,Pavona clavus,null,per mil PDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,null) 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,Pavona clavus,null,per mil PDB,null,corals and sclerosponges,raw,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges (Delta 14C,Pavona clavus,null,per mil NBS oxalic acid,null,corals and sclerosponges,raw,accelerator mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges earth science/paleoclimate/corals and sclerosponges (Urvina Bay>LATITUDE -.25>LONGITUDE -91.367) We present seasonal D14C and d18O measurements from a Galapagos coral sequence that grew during the early 20th century. Our results show that both D14C and d18O values are correlated with sea surface temperature in the Niño 3.4 region and are indicators of El Niño/Southern Oscillation. There is a significant inverse correlation between D14C and d18O values when D14C is lagged by ~2 months, indicating that sea surface temperature changes precede upwelling changes at this eastern equatorial location. We find that cold season low D14C values were higher after the Pacific Decadal Oscillation (PDO) changed from a positive to a negative phase. Cold season high d18O values were significantly higher after the PDO shift, as well. These findings suggest that there are two sources of low D14C waters that upwell at the Galapagos, Subantarctic Mode Water and shallow overturning water from the subpolar North Pacific. STUDY NOTES: Seasonal Delta14C and delta 18O measurements of Pavona clavus U-86 sequence, same as that used by Dunbar et al. 1994 (Paleoceanography) for annual delta18O record. Accelerator Mass Spectrometry was used to determine Delta14C values, and light isotope ratio mass spectrometry to determine d18O values. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Druffel, E.R.M. Investigator : Griffin, S.M. Investigator : Glynn, D.S. Investigator : Dunbar, R.B. Investigator : Mucciarone, D.A. Investigator : Toggweiler, J.R. 2014-07-16 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/16971 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/druffel2014/druffel2014-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/druffel2014/druffel2014-14c.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/druffel2014/druffel2014-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/druffel2014/druffel2014-14c.txt English https://www.ncdc.noaa.gov/paleo/study/16971 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/druffel2014/druffel2014-d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/druffel2014/druffel2014-14c.txt Druffel, E.R.M., S.M. Griffin, D. Glynn, R.B. Dunbar, D. Mucciarone, and J.R. Toggweiler2014Seasonal radiocarbon and oxygen isotopes in a Galapagos coral: Calibration with climate indicesGeophysical Research Letters4110.1002/2014GL060504 START YEAR: 1939 AD * END YEAR: 1954 AD -91.367 -.25 -91.367 -.25