{"xmlId":"10398","NOAAStudyId":"12336","studyName":"Lynch's Crater 45,000 Year Optical Absorption Data","doi":"https://doi.org/10.25921/hqp8-dp13","uuid":"60174830-fe91-4573-9206-2be731032ecb","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":"PALEOLIMNOLOGY","investigators":"Turney, C.S.M.; Kershaw, A.P.; Clemens, S.C.; Branch, N.; Moss, P.T.; Fifield, L.K.","investigatorDetails":[{"firstName":"Chris","lastName":"Turney","initials":"C.S.M.","orcId":"0000-0001-6733-0993"},{"firstName":"A. Peter","lastName":"Kershaw","initials":"A.P.","orcId":"0000-0002-9478-0567"},{"firstName":"Steven","lastName":"Clemens","initials":"S.C.","orcId":"0000-0002-1136-7815"},{"firstName":"Nicholas","lastName":"Branch","initials":"N.","orcId":null},{"firstName":"Patrick","lastName":"Moss","initials":"P.T.","orcId":"0000-0003-1546-9242"},{"firstName":"L. Keith","lastName":"Fifield","initials":"L.K.","orcId":"0000-0003-2866-4944"}],"version":"1.0","funding":[{"fundingAgency":"UK Natural Environment Research Council (NERC)","fundingGrant":null},{"fundingAgency":"Australian Nuclear Science and Technology Organisation (ANSTO)","fundingGrant":null}],"studyNotes":"Optical absorption data from Lynch's Crater, Queensland, \nAustralia, as a proxy for peat decomposition (humification) \nand surface wetness at the time of peat deposition.  \nHigh values of absorption are interpreted as reflecting \ndry surface conditions, because increased microbial activity \nunder aerobic conditions increases the degree of peat \nhumification.  The chronology for the sequence is provided \nby 15 radiocarbon ages over the 45,000 year record. \n","onlineResourceLink":"https://www.ncei.noaa.gov/access/paleo-search/study/12336","difMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-12336.xml","isoMetadataLink":"https://www.ncei.noaa.gov/pub/data/metadata/published/paleo/iso/xml/noaa-lake-12336.xml","originalSource":null,"dataTypeInformation":"https://www.ncei.noaa.gov/products/paleoclimatology/lake","studyCode":null,"scienceKeywords":["hydrology"],"reconstruction":"N","contributionDate":"2011-12-14","entryId":"noaa-lake-12336","earliestYearBP":45000,"mostRecentYearBP":0,"earliestYearCE":-43050,"mostRecentYearCE":1950,"publication":[{"author":{"name":"Turney, C.S.M., A.P. Kershaw, S.C. Clemens, N. Branch, P.T. Moss, and L.K. Fifield"},"pubYear":2004,"title":"Millennial and orbital variations of El Niņo/Southern Oscillation and high-latitude climate in the last glacial period","journal":"Nature","volume":"428","edition":null,"issue":"6980","pages":"306-309","reportNumber":null,"citation":"Turney, C.S.M., A.P. Kershaw, S.C. Clemens, N. Branch, P.T. Moss, and L.K. Fifield. 2004. Millennial and orbital variations of El Niņo/Southern Oscillation and high-latitude climate in the last glacial period. Nature, 428(6980), 306-309. doi: 10.1038/nature02386","type":"publication","identifier":{"type":"doi","id":"10.1038/nature02386","url":"http://dx.doi.org/10.1038/nature02386"},"abstract":"The El Niņo/Southern Oscillation (ENSO) phenomenon is believed to have operated continuously over the last glacial-interglacial cycle. ENSO variability has been suggested to be linked to millennial-scale oscillations in North Atlantic climate during that time, but the proposals disagree on whether increased frequency of El Niņo events, the warm phase of ENSO, was linked to North Atlantic warm or cold periods. Here we present a high-resolution record of surface moisture, based on the degree of peat humification and the ratio of sedges to grass, from northern Queensland, Australia, covering the past 45,000 yr. We observe millennial-scale dry periods, indicating periods of frequent El Niņo events (summer precipitation declines in El Niņo years in northeastern Australia). We find that these dry periods are correlated to the Dansgaard-Oeschger events - millennial-scale warm events in the North Atlantic climate record - although no direct atmospheric connection from the North Atlantic to our site can be invoked. Additionally, we find climatic cycles at a semiprecessional timescale (~11,900 yr). We suggest that climate variations in the tropical Pacific Ocean on millennial as well as orbital timescales, which determined precipitation in northeastern Australia, also exerted an influence on North Atlantic climate through atmospheric and oceanic teleconnections.","pubRank":"1"}],"site":[{"NOAASiteId":"52523","siteName":"Lynch's Crater","siteCode":null,"mappable":"Y","locationName":"Continent>Australia/New Zealand>Australia>Queensland","geo":{"geoType":"Feature","geometry":{"type":"POINT","coordinates":["-17.3667","145.7"]},"properties":{"southernmostLatitude":"-17.3667","northernmostLatitude":"-17.3667","westernmostLongitude":"145.7","easternmostLongitude":"145.7","minElevationMeters":null,"maxElevationMeters":null}},"paleoData":[{"dataTableName":"Lynchs2004","NOAADataTableId":"20678","earliestYear":45000,"mostRecentYear":0,"timeUnit":"cal yr BP","earliestYearBP":45000,"mostRecentYearBP":0,"earliestYearCE":-43050,"mostRecentYearCE":1950,"coreLengthMeters":null,"dataTableNotes":null,"species":[],"dataFile":[{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/australia/lynchs2004.txt","urlDescription":"Data","linkText":"lynchs2004.txt","variables":[{"cvDataType":"PALEOLIMNOLOGY","cvWhat":"depth variable>depth","cvMaterial":null,"cvError":null,"cvUnit":"length unit>centimeter","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null},{"cvDataType":"PALEOLIMNOLOGY","cvWhat":"electromagnetic property>absorbance","cvMaterial":"biological material>bulk biological material>peat","cvError":null,"cvUnit":"concentration unit>percent","cvSeasonality":null,"cvDetail":null,"cvMethod":null,"cvAdditionalInfo":null,"cvFormat":"Numeric","cvShortName":null}],"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties"]},{"fileUrl":"https://www.ncei.noaa.gov/pub/data/paleo/paleolimnology/australia/lynchs2004.xls","urlDescription":"Data","linkText":"lynchs2004.xls","variables":[],"NOAAKeywords":["earth science>paleoclimate>paleolimnology>physical properties"]}]}]}],"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}