noaa-coral-18895 South Pagai Islands and Sunda Strait 53 Year Coral Oxygen Isotope Data Abram, N.J.; Dixon, B.; Rosevear, M.; Plunkett, B.; Gagan, M.K.; Hantoro, W.S.; Phipps, S.J. South Pagai Islands and Sunda Strait 53 Year Coral Oxygen Isotope Data 2015-06-19 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/18895 Investigator N.J. Abram Investigator B. Dixon Investigator M. Rosevear Investigator B. Plunkett Investigator M.K. Gagan Investigator W.S. Hantoro Investigator S.J. Phipps 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 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 1959 AD 2012 AD -9 cal yr BP -62 cal yr BP Complete -6.53333 -3.18333 100.51666 105.63333 -1 -1 Ocean Indian Ocean Indonesia Taitaitanopo Island>LATITUDE -3.18333>LONGITUDE 100.51666 Ocean Indian Ocean Indonesia Batu Hitam Beach>LATITUDE -6.53333>LONGITUDE 105.63333 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 Nerilie J. Abram, Bronwyn C. Dixon, Madelaine G. Rosevear, Benjamin Plunkett, Michael K. Gagan, Wahyoe S. Hantoro and Steven J. Phipps 2015 Paleoceanography 10.1002/2015PA002810 http://onlinelibrary.wiley.com/doi/10.1002/2015PA002810/abstract

The Indian Ocean Dipole (IOD; or Indian Ocean Zonal Mode) is a coupled ocean-atmosphere climate oscillation that has profound impacts on rainfall distribution across the Indian Ocean region. Instrumental records provide a reliable representation of IOD behaviour since 1958, while coral reconstructions currently extend the IOD history back to 1846. Large fluctuations in the number and intensity of positive IOD events over time are evident in these records, but it is unclear to what extent this represents multidecadal modulation of the IOD or an anthropogenically-forced change in IOD behaviour. In this study we explore the suitability of coral records from single-site locations in the equatorial Indian Ocean for capturing information about the occurrence and magnitude of positive IOD (pIOD) events. We find that the optimum location for coral reconstructions of the IOD occurs in the southeastern equatorial Indian Ocean, along the coast of Java and Sumatra between ~3-7S. Here the strong ocean cooling and atmospheric drying during pIOD events are unambiguously recorded in coral oxygen isotope records, which capture up to 50% of IOD variance. Unforced experiments with coupled climate models suggest that potential biases in coral estimates of pIOD frequency are skewed towards overestimating pIOD recurrence intervals, and become larger with shorter reconstruction windows and longer pIOD recurrence times. Model output also supports the assumption of stationarity in sea surface temperature relationships in the optimum IOD location that is necessary for paleoclimate reconstructions. This study provides a targeted framework for the future generation of paleoclimate records, including optimised coral reconstructions of past IOD variability. STUDY NOTES: Coral d18O data at monthly resolution South Pagai Islands and Sunda Strait, Indonesia

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/taitaitanopo2015.txt Data File; Taitaitanopo, South Pagai Islands Porites d18O Data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/coral/indian_ocean/batu-hitam2015.txt Data File; Batu Hitam Beach, Sunda Strait Porites d18O Data USA/NOAA DIF Version 9.8.4 2018-12-11 2018-12-11