noaa-tree-17267 Northern Queensland 15 Year Kauri Tree-Ring Oxygen Isotope Data Boysen, B.M.M.; Evans, M.N.; Baker, P.J. Northern Queensland 15 Year Kauri Tree-Ring Oxygen Isotope Data 2014-10-01 NCDC-Paleoclimatology ONLINE Files 10.25921/nyc7-0459 https://www.ncdc.noaa.gov/paleo/study/17267 Investigator B.M.M. Boysen Investigator M.N. Evans Investigator P.J. Baker earth science paleoclimate tree ring delta 18O,alpha cellulose,null,per mil VSMOW,null,tree ring,null,isotope ratio mass spectrometry,N,sample is approximately Nov-March earth science paleoclimate paleoclimatic modeling delta 18O,alpha cellulose,null,per mil VSMOW,Nov-Mar,paleoclimatic modeling,null,forward model,N,process-based forward modeling; median of 1000 simulations for each year earth science paleoclimate tree ring age,null,null,year Common Era,null,tree ring,null,null,N,null earth science paleoclimate tree-ring oxygen isotopes geoscientificInformation ENSO AGRO Agathis robusta (C. Moore ex F. Muell) Bailey kauri pine 1995 AD 2010 AD -45 cal yr BP -60 cal yr BP Complete -16.9794 -16.9794 145.6032 145.6032 700 700 Continent Australia/New Zealand Australia Queensland Dinden National Park>LATITUDE -16.9794>LONGITUDE 145.6032 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 Bjorn M. M. Boysen, Michael N. Evans, Patrick J. Baker 2014 PLoS ONE 9 7 10.1371/journal.pone.0102336 http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0102336

Long-lived trees from tropical Australasia are a potential source of information about internal variability of the El Nino-Southern Oscillation (ENSO), because they occur in a region where precipitation variability is closely associated with ENSO activity. We measured tree-ring width and oxygen isotopic composition (d18O) of alpha-cellulose from Agathis robusta (Queensland Kauri) samples collected in the Atherton Tablelands, Queensland, Australia. Standard ring-width chronologies yielded low internal consistency due to the frequent presence of false ring-like anatomical features. However, in a detailed examination of the most recent 15 years of growth (1995-2010), we found significant correlation between d18O and local precipitation, the latter associated with ENSO activity. The results are consistent with process-based forward modeling of the oxygen isotopic composition of alpha-cellulose. The d18O record also enabled us to confirm the presence of a false growth ring in one of the three samples in the composite record, and to determine that it occurred as a consequence of anomalously low rainfall in the middle of the 2004/5 rainy season. The combination of incremental growth and isotopic measures may be a powerful approach to development of long-term (150+ year) ENSO reconstructions from the terrestrial tropics of Australasia. STUDY NOTES: Tree-ring oxygen isotope data from Agathis robusta (Queensland Kauri) samples collected in Dinden National Park, Queensland, Australia, for 1995-2010 AD. Data are measured for the southern hemisphere November-April growing season. Also included are datafile BEB14.dat and a matlab script to plot the data as in Fig 2(a) of Boysen et al. 2014. In the datafile BEB14.dat, data are identifed by the year growth began, i.e. 1995 data correspond to the growing season Nov 1995 - Apr 1996. IITRDB14

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/australia/data2fig2a.m Matlab Script; Matlab script to plot the data GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/australia/BEB14.dat Space Delimited ASCII Data File; Oxygen Isotope Data File BEB14.dat for MATLAB script GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/isotope/australia/queensland2014tr-iso.txt Data and Information File; Queensland Kauri Tree-Ring Oxygen Isotope Data USA/NOAA DIF Version 9.8.4 2019-03-01 2019-03-01