{"NOAAStudyId":"18957","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":"2015-04-20","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-18957.xml","doi":"https://doi.org/10.25921/p8pp-q352","earliestYearBP":188,"earliestYearCE":1762,"entryId":"noaa-tree-18957","funding":[],"investigators":"O'Donnell , A.J.; Cook, E.R.; Palmer, J.G.; Turney, C.S.M.; Page, G.F.M.; Grierson, P.F.","mostRecentYearBP":-62,"mostRecentYearCE":2012,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/18957","originalSource":null,"publication":[{"abstract":"An understanding of past hydroclimatic variability is critical to resolving the significance of recent recorded trends in Australian precipitation and informing climate models. Our aim was to reconstruct past hydroclimatic variability in semi-arid northwest Australia to provide a longer context within which to examine a recent period of unusually high summer-autumn precipitation. We developed a 210-year ring-width chronology from Callitris columellaris, which was highly correlated with summer-autumn (Dec-May) precipitation (r = 0.81; 1910-2011; p < 0.0001) and autumn (Mar-May) self-calibrating Palmer drought severity index (scPDSI, r = 0.73; 1910-2011; p < 0.0001) across semi-arid northwest Australia. A linear regression model was used to reconstruct precipitation and explained 66% of the variance in observed summer-autumn precipitation. Our reconstruction reveals inter-annual to multi-decadal scale variation in hydroclimate of the region during the last 210 years, typically showing periods of below average precipitation extending from one to three decades and periods of above average precipitation, which were often less than a decade. Our results demonstrate that the last two decades (1995-2012) have been unusually wet (average summer-autumn precipitation of 310 mm) compared to the previous two centuries (average summer-autumn precipitation of 229 mm), coinciding with both an anomalously high frequency and intensity of tropical cyclones in northwest Australia and the dominance of the positive phase of the Southern Annular Mode.","author":{"name":"Alison J. O'Donnell, Edward R. Cook, Jonathan G. Palmer, Chris S. M. Turney, Gerald F. M. Page, Pauline F. Grierson"},"citation":"Alison J. O'Donnell, Edward R. Cook, Jonathan G. Palmer, Chris S. M. Turney, Gerald F. M. Page, Pauline F. Grierson. 2015. Tree Rings Show Recent High Summer-Autumn Precipitation in Northwest Australia Is Unprecedented within the Last Two Centuries. PLoS ONE. . doi: 10.1371/journal.pone.0128533","edition":null,"identifier":{"id":"10.1371/journal.pone.0128533","type":"doi","url":"http://dx.doi.org/10.1371/journal.pone.0128533"},"issue":null,"journal":"PLoS ONE","pages":null,"pubRank":"1","pubYear":2015,"reportNumber":null,"title":"Tree Rings Show Recent High Summer-Autumn Precipitation in Northwest Australia Is Unprecedented within the Last Two Centuries","type":"publication","volume":null}],"reconstruction":"N","scienceKeywords":["Southern Annular Mode (SAM)"],"site":[{"NOAASiteId":"56535","geo":{"geoType":"Feature","geometry":{"coordinates":["-22.8333","118.6167"],"type":"POINT"},"properties":{"easternmostLongitude":"118.6167","maxElevationMeters":"800","minElevationMeters":"800","northernmostLatitude":"-22.8333","southernmostLatitude":"-22.8333","westernmostLongitude":"118.6167"}},"locationName":"Continent>Australia/New Zealand>Australia>Western Australia","mappable":"Y","paleoData":[{"NOAADataTableId":"29376","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/ausl037.txt","linkText":"ausl037.txt","urlDescription":"Correlation Stats","variables":[]},{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/australia/ausl037.crn","linkText":"ausl037.crn","urlDescription":"Chronology","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":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"count","cvWhat":"sampling metadata>number of samples"},{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":"composited","cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"standard","cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"statistical variable>proxy composite>tree ring standardized growth index"}]},{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/chronologies/australia/ausl037-noaa.crn","linkText":"ausl037-noaa.crn","urlDescription":"Chronology - NOAA Template File","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":null,"cvDataType":"TREE RING","cvDetail":null,"cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":null,"cvSeasonality":null,"cvShortName":null,"cvUnit":"count","cvWhat":"sampling metadata>number of samples"},{"cvAdditionalInfo":null,"cvDataType":"TREE RING","cvDetail":"composited","cvError":null,"cvFormat":"Numeric","cvMaterial":null,"cvMethod":"standard","cvSeasonality":null,"cvShortName":null,"cvUnit":null,"cvWhat":"statistical variable>proxy composite>tree ring standardized growth index"}]},{"NOAAKeywords":["earth science>paleoclimate>tree-ring>width>ring width"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/treering/measurements/australia/ausl037.rwl","linkText":"ausl037.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/ausl037-noaa.rwl","linkText":"ausl037-noaa.rwl","urlDescription":"Raw Measurements - NOAA Template File","variables":[{"cvAdditionalInfo":"Tree ID: CJD002E; 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