noaa-recon-20245 Eastern Australia and New Zealand Drought Atlas (ANZDA) Palmer, J.G.; Cook, E.R.; Turney, C.S.M.; Allen, K.J.; Fenwick, P.; Cook, B.I.; O'Donnell , A.J.; Lough, J.M.; Grierson, P.F.; Baker, P.J. Eastern Australia and New Zealand Drought Atlas (ANZDA) 2016-06-06 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/20245 Investigator J.G. Palmer Investigator E.R. Cook Investigator C.S.M. Turney Investigator K.J. Allen Investigator P. Fenwick Investigator B.I. Cook Investigator A.J. O'Donnell Investigator J.M. Lough Investigator P.F. Grierson Investigator P.J. Baker earth science paleoclimate climate reconstructions|corals and sclerosponges|tree ring Palmer Drought Severity Index,null,calibration coefficient of determination,dimensionless,Dec-Feb,climate reconstructions|corals and sclerosponges|tree ring,null,null,N,null earth science paleoclimate instrumental longitude,null,null,degree east,null,instrumental,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges|tree ring Palmer Drought Severity Index,null,calibration leave-one-out cross-validation reduction of error,dimensionless,Dec-Feb,climate reconstructions|corals and sclerosponges|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges|tree ring latitude,null,null,degree north,null,climate reconstructions|corals and sclerosponges|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges|tree ring longitude,null,null,degree east,null,climate reconstructions|corals and sclerosponges|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges|tree ring Palmer Drought Severity Index,null,verification reduction of error,dimensionless,Dec-Feb,climate reconstructions|corals and sclerosponges|tree ring,null,null,N,null earth science paleoclimate instrumental age,null,null,year Common Era,null,instrumental,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges|tree ring Palmer Drought Severity Index,null,verification coefficient of efficiency,dimensionless,Dec-Feb,climate reconstructions|corals and sclerosponges|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges|tree ring age,null,null,year Common Era,null,climate reconstructions|corals and sclerosponges|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges|tree ring Palmer Drought Severity Index,null,null,standard deviation unit,Dec-Feb,climate reconstructions|corals and sclerosponges|tree ring,null,null,N,null earth science paleoclimate climate reconstructions|corals and sclerosponges|tree ring Palmer Drought Severity Index,null,verification coefficient of determination,dimensionless,Dec-Feb,climate reconstructions|corals and sclerosponges|tree ring,null,null,N,null earth science paleoclimate instrumental latitude,null,null,degree north,null,instrumental,null,null,N,null earth science paleoclimate instrumental Palmer Drought Severity Index,null,null,standard deviation unit,Dec-Feb,instrumental,null,null,N,null earth science paleoclimate reconstructions precipitation geoscientificInformation Palmer Drought Index Reconstruction drought 1500 AD 2012 AD 450 cal yr BP -62 cal yr BP Complete -47 -11 136 178.5 Continent Australia/New Zealand Eastern Australia and New Zealand>LATITUDE >LONGITUDE 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

325 Broadway, E/NE31

Boulder CO 80305-3328 USA online ASCII Jonathan G. Palmer, Edward R. Cook, Chris S.M. Turney, Kathy Allen, Pavla Fenwick, Benjamin I. Cook, Alison O'Donnell, Janice Lough, Pauline Grierson, Patrick Baker 2015 Environmental Research Letters 124002 10 12 10.1088/1748-9326/10/12/124002 http://iopscience.iop.org/article/10.1088/1748-9326/10/12/124002/

Agricultural production across eastern Australia and New Zealand is highly vulnerable to drought, but there is a dearth of observational drought information prior to CE 1850. Using a comprehensive network of 176 drought-sensitive tree-ring chronologies and one coral series, we report the first Southern Hemisphere gridded drought atlas extending back to CE 1500. The austral summer (December-February) Palmer drought sensitivity index reconstruction accurately reproduces historically documented drought events associated with the first European settlement of Australia in CE 1788, and the leading principal component explains over 50% of the underlying variance. This leading mode of variability is strongly related to the Interdecadal Pacific Oscillation tripole index (IPO), with a strong and robust antiphase correlation between (1) eastern Australia and the New Zealand North Island and (2) the South Island. Reported positive, negative, and neutral phases of the IPO are consistently reconstructed by the drought atlas although the relationship since CE 1976 appears to have weakened. STUDY NOTES: Eastern Australia and New Zealand 500-year austral summer (December-February) gridded (0.5x0.5 degree) Palmer drought severity index reconstruction (PDSI), based on 176 drought-sensitive tree-ring chronologies and one coral series.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/australia/palmer2015pdsi/readme-palmer2015anzda.txt Data Description; Palmer et al. 2015 ANZDA Readme File GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/australia/palmer2015pdsi/anzda-act-djf-anom.txt Data File; Actual Instrumental JJA PDSI Series for 1375 Gridpoints GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/australia/palmer2015pdsi/anzda-recon.txt Data File; Reconstructions of JJA PDSI Series for 1375 Gridpoints GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/australia/palmer2015pdsi/anzda-calver-stats.txt Data File; Calibration and Verification Statistics for JJA PDSI Series GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/treering/reconstructions/australia/palmer2015pdsi/anzda-pdsi-xy.txt Data File; Longitude-Latitude Pairs for 1375 Gridpoints USA/NOAA DIF Version 9.8.4 2019-05-17 2019-05-17