{"NOAAStudyId":"20750","contactInfo":{"address":"325 Broadway, E/NE31","city":"Boulder","constraints":"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.","country":"USA","dataCenterUrl":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data","email":"paleo@noaa.gov","fax":"303-497-6513","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","phone":"303-497-6280","postalCode":"80305-3328","shortName":"DOC/NOAA/NESDIS/NCEI","state":"CO","type":"CONTACT INFORMATION"},"contributionDate":"2016-11-07","dataPublisher":"NOAA","dataType":"TREE RING","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/tree-ring","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-tree-20750.xml","doi":"https://doi.org/10.25921/evvd-an62","earliestYearBP":13125,"earliestYearCE":-11175,"entryId":"noaa-tree-20750","funding":[],"investigators":"Palmer, J.G.; Fenwick, P.; Turney, C.S.M.","mostRecentYearBP":11675,"mostRecentYearCE":-9725,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/20750","originalSource":null,"publication":[{"abstract":"The warming trend at the end of the last glacial was disrupted by rapid cooling clearly identified in Greenland (Greenland Stadial 1 or GS-1) and Europe (Younger Dryas Stadial or YD). This reversal to glacial-like conditions is one of the best known examples of abrupt change but the exact timing and global spatial extent remain uncertain. Whilst the wider Atlantic region has a network of high-resolution proxy records spanning GS-1, the Pacific Ocean suffers from a scarcity of sub-decadally resolved sequences. Here we report the results from an investigation into a tree-ring chronology from northern New Zealand aimed at addressing the paucity of data. The conifer tree species kauri (Agathis australis) is known from contemporary studies to be sensitive to regional climate changes. An analysis of a 'historic' 452-year kauri chronology confirms a tropica--Pacific teleconnection via the El Niño - Southern Oscillation (ENSO). We then focus our study on a 1010-year sub-fossil kauri chronology that has been precisely dated by comprehensive radiocarbon dating and contains a striking ring-width downturn between -12,500 and 12,380 cal BP within GS-1. Wavelet analysis shows a marked increase in ENSO-like periodicities occurring after the downturn event. Comparison to low- and mid-latitude Pacific records suggests a coherency with ENSO and Southern Hemisphere atmospheric circulation change during this period. The driver(s) for this climate event remain unclear but may be related to solar changes that subsequently led to establishment and/or increased expression of ENSO across the mid-latitudes of the Pacific, seemingly independent of the Atlantic and polar regions.","author":{"name":"Jonathan G. Palmer, Chris S.M. Turney, Edward R. Cook, Pavla Fenwick, Zoë Thomas, Gerhard Helle, Richard Jones, Amy Clement, Alan Hogg, John Southon, Christopher Bronk Ramsey, Richard Staff, Raimund Muscheler, Thierry Corrège, Quan Hua"},"citation":"Jonathan G. Palmer, Chris S.M. Turney, Edward R. Cook, Pavla Fenwick, Zoë Thomas, Gerhard Helle, Richard Jones, Amy Clement, Alan Hogg, John Southon, Christopher Bronk Ramsey, Richard Staff, Raimund Muscheler, Thierry Corrège, Quan Hua. 2016. Changes in El Niño - Southern Oscillation (ENSO) conditions during the Greenland Stadial 1 (GS-1) chronozone revealed by New Zealand tree-rings. Quaternary Science Reviews, 153, 139-155. doi: 10.1016/j.quascirev.2016.10.003","edition":null,"identifier":{"id":"10.1016/j.quascirev.2016.10.003","type":"doi","url":"http://dx.doi.org/10.1016/j.quascirev.2016.10.003"},"issue":null,"journal":"Quaternary Science Reviews","pages":"139-155","pubRank":"1","pubYear":2016,"reportNumber":null,"title":"Changes in El Niño - Southern Oscillation (ENSO) conditions during the Greenland Stadial 1 (GS-1) chronozone revealed by New Zealand tree-rings","type":"publication","volume":"153"}],"reconstruction":"N","scienceKeywords":["AGAU","Agathis australis (D. Don) Loudon","kauri pine"],"site":[{"NOAASiteId":"56911","geo":{"geoType":"Feature","geometry":{"coordinates":["-35.417","174.1729"],"type":"POINT"},"properties":{"easternmostLongitude":"174.1729","maxElevationMeters":"120","minElevationMeters":"120","northernmostLatitude":"-35.417","southernmostLatitude":"-35.417","westernmostLongitude":"174.1729"}},"locationName":"Continent>Australia/New Zealand>New Zealand","mappable":"Y","paleoData":[{"NOAADataTableId":"31500","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/correlation-stats/newz116.txt","linkText":"newz116.txt","urlDescription":"Correlation Stats","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/australia/newz116.rwl","linkText":"newz116.rwl","urlDescription":"Raw Measurements","variables":[{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"year Common Era","cvWhat":"age variable>age"},{"cvAdditionalInfo":"units are 0.01 mm if end-of-series marker is 999 and 0.001 mm if end-of-series marker is -9999","cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"millimeter","cvWhat":"physical property>length>total ring width"}]},{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/australia/newz116-noaa.rwl","linkText":"newz116-noaa.rwl","urlDescription":"Raw Measurements - NOAA Template File","variables":[{"cvAdditionalInfo":"Tree ID: TOW117A; 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