{"NOAAStudyId":"22411","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":"2017-07-10","dataPublisher":"NOAA","dataType":"PALEOLIMNOLOGY","dataTypeInformation":"https://www.ncdc.noaa.gov/data-access/paleoclimatology-data/datasets/lake","difMetadataLink":"http://www1.ncdc.noaa.gov/pub/data/metadata/published/paleo/dif/xml/noaa-lake-22411.xml","doi":null,"earliestYearBP":5690,"earliestYearCE":-3740,"entryId":"noaa-lake-22411","funding":[],"investigators":"Gouramanis, C.; Wilkins, D.; De Deckker, P.","mostRecentYearBP":5,"mostRecentYearCE":1945,"onlineResourceLink":"https://www.ncdc.noaa.gov/paleo/study/22411","originalSource":null,"publication":[{"abstract":"A 4 m long core taken from the freshwater Blue Lake crater near the township of Mount Gambier in southeastern South Australia provided a high-resolution palaeoclimatic record for the last six millennia. Accelerator Mass Spectrometry (AMS) radiocarbon (14C) dates were obtained from organic plant fibres and biogenic carbonates from the laminated sequence of the core and from a modern water sample. Large discrepancies between the radiocarbon ages determined from plant fibres and biogenic carbonates indicate the presence of a time-variable lacustrine reservoir, which is consistent with what is known of the lake's hydrology.\r\n\r\nOstracod assemblages, associated with stable isotope (d13C, d18O) analyses and, in combination with Mg/Ca, Sr/Ca and Na/Ca analyses done on ostracod valves, infer salinity, temperature and water level changes in Blue Lake over the last 6 millenia. The influence of local aquifers through time has also been determined from the Na/Ca of ostracod valves. Approximately 900 year cycles are evident in the d13C record from 5.4 ka to 1.8 ka.\r\n\r\nThe history of Blue Lake records an initial period of high hydrological variability around 6 ka, becoming increasingly deeper as groundwater flowed into the basin. By 4 ka, the lake had reached steady state with the lake level fluctuating by as much as 9 m, although significant geochemical variations represent temperature fluctuations until European settlement near the lake in 1839.","author":{"name":"Chris Gouramanis, Daniel Wilkins, Patrick De Deckker"},"citation":"Chris Gouramanis, Daniel Wilkins, Patrick De Deckker. 2011. 6000 years of environmental changes recorded in Blue Lake, South Australia, based on ostracod ecology and valve chemistry. Palaeogeography, Palaeoclimatology, Palaeoecology, 297(1), 223-237. doi: 10.1016/j.palaeo.2010.08.005","edition":null,"identifier":{"id":"10.1016/j.palaeo.2010.08.005","type":"doi","url":"http://dx.doi.org/10.1016/j.palaeo.2010.08.005"},"issue":"1","journal":"Palaeogeography, Palaeoclimatology, Palaeoecology","pages":"223-237","pubRank":"1","pubYear":2011,"reportNumber":null,"title":"6000 years of environmental changes recorded in Blue Lake, South Australia, based on ostracod ecology and valve chemistry","type":"publication","volume":"297"}],"reconstruction":"Y","scienceKeywords":null,"site":[{"NOAASiteId":"57364","geo":{"geoType":"Feature","geometry":{"coordinates":["-37.014087","140.012913"],"type":"POINT"},"properties":{"easternmostLongitude":"140.012913","maxElevationMeters":"24","minElevationMeters":"24","northernmostLatitude":"-37.014087","southernmostLatitude":"-37.014087","westernmostLongitude":"140.012913"}},"locationName":"Continent>Australia/New Zealand>Australia>South Australia","mappable":"Y","paleoData":[{"NOAADataTableId":"33534","coreLengthMeters":null,"dataFile":[{"NOAAKeywords":["earth science>paleoclimate>paleolimnology>geochemistry","earth science>paleoclimate>paleolimnology>carbon isotopes","earth science>paleoclimate>paleolimnology>oxygen isotopes"],"fileUrl":"https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/blue2010ostracod.txt","linkText":"Blue Lake Ostracod Geochemical Data","urlDescription":"Formatted Text Data File","variables":[{"cvAdditionalInfo":"ostracod L. mowbrayensis; 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