Clipperton Atoll 1874-1994 Sr/Ca and Oxygen Isotope Data Wu, H.C.; Moreau, M.; Linsley, B.K.; Schrag, D.P.; Corrège, T. Wu, H.C. Moreau, M. Linsley, B.K. Schrag, D.P. Corrège, T. ENSO earth science/paleoclimate/corals and sclerosponges (strontium/calcium,Porites lobata,null,millimole per mole,null,corals and sclerosponges,interpolated,inductively-coupled plasma 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,Porites lobata,null,per mil VPDB,null,corals and sclerosponges,interpolated,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/corals and sclerosponges earth science/paleoclimate/corals and sclerosponges (Clipperton Atoll>LATITUDE 10.3>LONGITUDE -109.22) Sub-seasonally resolved and replicated coral Sr/Ca time series at Clipperton Atoll (10°18'N, 109°13'W) in the eastern Pacific are assessed as a sea surface temperature (SST) proxy in this region with small seasonal SST variability. The composite coral Sr/Ca time series is a partially replicated record of three live and one sub- modern colony of Porites lobata extending back to 1874. Large inter-colony coral Sr/Ca offsets equate to relative SST differences of 0.6 to 4.3 °C and limit the ability to reconstruct absolute SST changes. Moreover, the replication method revealed a 12-year section of growth in one colony where mean Sr/Ca was anomalously low (~1 °C higher SST) relative to the other colonies without evidence of diagenesis or other significant skeletal alterations. The presence of this anomalous interval supports the need for multi-coral Sr/Ca replication in specific sites or re- gions. The Clipperton Composite Sr/Ca anomaly record is significantly coherent (r = 0.71–0.76, p b 0.001) with gridded instrumental SSTs but with larger amplitude decadal variance that appears to more accurately represent actual SST variability at Clipperton. The amplitude of the secular warming trend during the last century at Clipperton is 0.3 to 0.6 °C larger (~twice as large) than the trend in the poorly “ground-truthed” instrumental SST records for the region. The interannual and decadal variability in Clipperton coral Sr/Ca demonstrates strong coherence to the Pacific Decadal Oscillation and the El Nino/Southern Oscillation (ENSO) with reduced ENSO variability from 1920 to late 1930s and enhanced variability in the late twentieth century. STUDY NOTES: Monthly data from Porites lobata. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Wu, H.C. Investigator : Moreau, M. Investigator : Linsley, B.K. Investigator : Schrag, D.P. Investigator : Corrège, T. 2014-10-31 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/17380 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-6a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-f1b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-2b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-4b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-6a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-f1b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-2b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-4b.txt English https://www.ncdc.noaa.gov/paleo/study/17380 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-6a.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-f1b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-2b.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/east_pacific/wu2014/wu2014-4b.txt Wu, H.C., M. Moreau, B.K. Linsley, D.P. Schrag, and T. Corrège2014Investigation of sea surface temperature changes from replicated coral Sr/Ca variations in the eastern equatorial Pacific (Clipperton Atoll)Palaeogeography, Palaeoclimatology, Palaeoecology412208-22210.1016/j.palaeo.2014.07.039 START YEAR: 1874 AD * END YEAR: 1993 AD -109.22 10.3 -109.22 10.3