Abrolhos Coral d18O, PAGES Australasia 2k Version Kuhnert, H. Kuhnert, H. PAGES 2k Network PAGES Australasia 2k 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 lutea,null,per mil VPDB,Sep-Feb,corals and sclerosponges,averaged,isotope ratio mass spectrometry,N,seasonal averages) earth science/paleoclimate/corals and sclerosponges (Abrolhos>LATITUDE -28.45>LONGITUDE 113.77) A core from a coral colony of Porites lutea was analysed for stable oxygen isotopic composition. A 200-year proxy record of sea surface temperatures from the Houtman Abrolhos Islands off west Australia was obtained from coral δ18O. At 29′S, the Houtman Abrolhos are the southernmost major reef complex of the Indian Ocean. They are located on the path of the Leeuwin Current, a southward flow of warm, tropical water, which is coupled to Indonesian throughflow. Coral δ18O primarily reflects local oceanographic and climatic variability, which is largely determined by spatial variability of the Leeuwin Current. However, coherence between coral δ18O and the current strength itself is relatively weak. Evolutionary spectral and singular spectrum analyses of coral δ18O demonstrate a high variability in spectral composition through time. Oscillations in the 5–7-y, 14–15-y, and quasi-biennial bands reflect teleconnections of local sea surface temperature (SST) to tropical Pacific climate variability. Deviations between local (coral-based) and regional (instrument) SST contain a cyclic component with a period of 15 y. Coral δ18O suggests a rise in SST by 0.6 ′C since AD 1944, consistent with available instrumental SST records. A long-term warming by 1.4 ′C since AD 1795 is inferred from the coral record. STUDY NOTES: Uploaded by R. Neukom, data obtained from NOAA Paleo DB. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Kuhnert, H. 2013-03-01 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/1003965 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/abrolhos_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/pages2k/australasia2k/Abrolhos.txt https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/abrolhos_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/pages2k/australasia2k/Abrolhos.txt English https://www.ncdc.noaa.gov/paleo/study/1003965 https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/abrolhos_data.txt https://www1.ncdc.noaa.gov/pub/data/paleo/reconstructions/pages2k/australasia2k/Abrolhos.txt Kuhnert, H., J. Pätzold, B. Hatcher, K.-H. Wyrwoll, A. Eisenhauer, L.B. Collins, Z.R. Zhu, and G. Wefer1999A 200-year coral stable oxygen isotope record from a high-latitude reef off Western AustraliaCoral Reefs181-1210.1007/s003380050147 START YEAR: 1794 AD * END YEAR: 1993 AD 113.77 -28.45 113.77 -28.45