{"xmlId":"7290","NOAAStudyId":"5435","studyName":"Xia et al. 2001 Lynds Cave, Tasmania Speleothem Data","doi":"https://doi.org/10.25921/wvzy-wd75","uuid":"1a64b676-fff1-4d6e-b9ac-203e6754b284","dataPublisher":"NOAA","contactInfo":{"type":"CONTACT INFORMATION","shortName":"DOC/NOAA/NESDIS/NCEI","longName":"National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce ","address":"325 Broadway, E/NE31","city":"Boulder","state":"CO","postalCode":"80305-3328","country":"USA","dataCenterUrl":"https://www.ncei.noaa.gov/products/paleoclimatology","email":"paleo@noaa.gov","phone":"828-271-4800","fax":null,"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."},"dataType":"SPELEOTHEMS","investigators":"Xia, Q.K.; Zhao, J.-x.; Collerson, K.D.","investigatorDetails":[{"firstName":"Qikai","lastName":"Xia","initials":"Q.K.","orcId":null},{"firstName":"Jian-xin","lastName":"Zhao","initials":"J.-x.","orcId":"0000-0002-2413-6178"},{"firstName":"Kenneth","lastName":"Collerson","initials":"K.D.","orcId":"0000-0002-1823-306X"}],"version":"1.0","funding":[],"studyNotes":null,"onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/5435","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-cave-5435.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-cave-5435.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/speleothem","studyCode":null,"scienceKeywords":null,"reconstruction":"N","contributionDate":"2006-05-04","entryId":"noaa-cave-5435","earliestYearBP":8888,"mostRecentYearBP":5081,"earliestYearCE":-6938,"mostRecentYearCE":-3131,"publication":[{"author":{"name":"Xia, Qikai, Jian-xin Zhao, K.D Collerson"},"pubYear":2001,"title":"Early-Mid Holocene climatic variations in Tasmania, Australia: multi-proxy records in a stalagmite from Lynds Cave.","journal":"Earth and Planetary Science Letters","volume":"194","edition":null,"issue":"1-2","pages":"177-187","reportNumber":null,"citation":"Xia, Qikai, Jian-xin Zhao, K.D Collerson. 2001. Early-Mid Holocene climatic variations in Tasmania, Australia: multi-proxy records in a stalagmite from Lynds Cave. Earth and Planetary Science Letters, 194(1-2), 177-187. doi: 10.1016/S0012-821X(01)00541-6","type":"publication","identifier":{"type":"doi","id":"10.1016/S0012-821X(01)00541-6","url":"http://dx.doi.org/10.1016/S0012-821X(01)00541-6"},"abstract":"Mass spectrometric uranium-series dating and C-O isotopic analysis of a \r\nstalagmite from Lynds Cave, northern Tasmania, Australia provide a high-\r\nresolution record of regional climate change between 5100 and 9200 yr \r\nbefore present (BP). Combined d18O, d13C, growth rate, initial 234U/238U \r\nand physical property (color, transparency and porosity) records allow \r\nrecognition of seven climatic stages: Stage I (>9080 yr BP) - a relatively \r\ndry period at the beginning of stalagmite growth evidenced by elevated \r\n234U/238U; Stage II (9080-8600 yr BP) - a period of unstable climate \r\ncharacterized by high-frequency variability in temperature and \r\nbio-productivity; Stage III (8600-8000 yr BP) - a period of stable and \r\nmoderate precipitation and stable and high bio-productivity, with a \r\ncontinuously rising temperature; Stage IV (8000-7400 yr BP) - the warmest \r\nperiod with high evaporation and low effective precipitation (rainfall \r\nless evaporation); Stage V (7400-7000 yr BP) - the wettest period with \r\nhighest stalagmite growth and enhanced but unstable bio-productivity; \r\nStage VI (7000-6600 yr BP) - a period with a significantly reduced \r\nprecipitation and bio-productivity without noticeable change in temperature; \r\nStage VII (6600-5100 yr BP) - a period of lowest temperature and \r\nprecipitation marking a significant climatic deterioration. Overall, \r\nthe records suggest that the warmest climate occurred between 8000 and \r\n7400 yr BP, followed by a wettest period between 7400 and 7000 yr BP. \r\nThese are broadly correlated with the so-called 'Mid Holocene optimum' \r\npreviously proposed using pollen and lake level records. However, the \r\ntiming and resolution of the speleothem record from Lynds Cave are \r\nsignificantly higher than in both the pollen and lake level records. \r\nThis allows us to correlate the abrupt change in physical property, \r\nd18O, d13C, growth rate, and initial 234U/238U of the stalagmite at \r\n~8000 yr BP with a global climatic event at Early-Mid Holocene transition.","pubRank":"1"}],"site":[{"NOAASiteId":"6563","siteName":"Lynds Cave","siteCode":null,"mappable":"Y","locationName":"Continent>Australia/New Zealand>Australia","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["-41.58","146.25"]},"properties":{"southernmostLatitude":"-41.58","northernmostLatitude":"-41.58","westernmostLongitude":"146.25","easternmostLongitude":"146.25","minElevationMeters":null,"maxElevationMeters":null}},"paleoData":[{"dataTableName":"Lynds Cave Core 001","NOAADataTableId":"7181","earliestYear":-6938,"mostRecentYear":-3131,"timeUnit":"CE","earliestYearBP":8888,"mostRecentYearBP":5081,"earliestYearCE":-6938,"mostRecentYearCE":-3131,"coreLengthMeters":null,"dataTableNotes":null,"species":[],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/speleothem/australia/lynds2001.txt","urlDescription":"Speleothem","linkText":"lynds2001.txt","variables":[{"cvDataType":"SPELEOTHEMS","cvWhat":"depth variable>depth","cvMaterial":null,"cvError":null,"cvUnit":"length unit>millimeter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"SPELEOTHEMS","cvWhat":"depth variable>depth","cvMaterial":null,"cvError":null,"cvUnit":"length unit>millimeter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":"depth measured relative to bottom of core","cvFormat":"Numeric","cvShortName":null},{"cvDataType":"SPELEOTHEMS","cvWhat":"age variable>age","cvMaterial":null,"cvError":null,"cvUnit":"time unit>age unit>calendar kiloyear before present","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"SPELEOTHEMS","cvWhat":"chemical composition>isotope>isotope ratio>delta 18O","cvMaterial":"geological material>identified mineral>carbonate>calcium carbonate","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil PDB","cvSeasonality":null,"cvDetail":"raw","cvMethod":"laboratory method>spectroscopy>mass spectrometry>isotope ratio mass spectrometry","cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"SPELEOTHEMS","cvWhat":"chemical composition>isotope>isotope ratio>delta 13C","cvMaterial":"geological material>identified mineral>carbonate>calcium carbonate","cvError":null,"cvUnit":"concentration unit>parts per notation unit>parts per thousand>per mil>per mil PDB","cvSeasonality":null,"cvDetail":"raw","cvMethod":"laboratory method>spectroscopy>mass spectrometry>isotope ratio mass spectrometry","cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null}],"NOAAKeywords":["earth science>paleoclimate>speleothems>oxygen isotopes","earth science>paleoclimate>speleothems>carbon isotopes"]}]}]}],"reference":{"pastThesaurusSkos":"https://www.ncei.noaa.gov/access/paleo-search/skos/past-thesaurus.rdf","pastThesaurusExplorer":"https://www.ncei.noaa.gov/access/paleo-search/cvterms","gcmdKeywordThesaurus":"https://earthdata.nasa.gov/earth-observation-data/find-data/idn/gcmd-keywords"},"dataLicenseDescription":null,"dataLicenseUrl":null}