noaa-lake-22411 Blue Lake, South Australia 6,000 Year Ostracod Geochemical Data Gouramanis, C.; Wilkins, D.; De Deckker, P. Blue Lake, South Australia 6,000 Year Ostracod Geochemical Data 2017-07-10 NCDC-Paleoclimatology ONLINE Files Pending https://www.ncdc.noaa.gov/paleo/study/22411 Investigator C. Gouramanis Investigator D. Wilkins Investigator P. De Deckker earth science paleoclimate paleolimnology strontium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod G. australica; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology strontium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod C. novaezelandiae; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology strontium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod I. smaragdinus; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology sodium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod L. mowbrayensis; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology magnesium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod I. smaragdinus; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology strontium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod L. dorsosicula; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology sodium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod G. australica; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology sodium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod I. smaragdinus; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,ostracod C. novaezelandiae; error 0.08 per mil; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate climate reconstructions|paleolimnology salinity,lake water|ostracod assemblage,null,milligram per liter,null,climate reconstructions|paleolimnology,null,modern analogue technique,N,Root Mean Square Error: 0.23 bootstrapped R2: 0.84; training set based on 537 modern samples; weighted average of 10 modern analogues earth science paleoclimate climate reconstructions|paleolimnology age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,null earth science paleoclimate paleolimnology magnesium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod L. dorsosicula; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology sodium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod L. dorsosicula; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology magnesium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod G. australica; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology magnesium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod C. novaezelandiae; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology sodium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod C. novaezelandiae; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,ostracod G. australica; error 0.08 per mil; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,ostracod I. smaragdinus; error 0.08 per mil; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology strontium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod L. mowbrayensis; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate climate reconstructions|paleolimnology total dissolved solids,ostracod assemblage,null,milligram per liter,null,climate reconstructions|paleolimnology,null,modern analogue technique,N,Root Mean Square Error: 0.23 bootstrapped R2: 0.84; training set based on 537 modern samples; weighted average of 10 modern analogues earth science paleoclimate climate reconstructions|paleolimnology depth,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,null earth science paleoclimate paleolimnology magnesium/calcium,ostracod,null,mole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,ostracod L. mowbrayensis; Relative Standard Deviation; <5%; values for each species at each depth cannot be averaged due to lack of normalisation of geochemistry across species earth science paleoclimate paleolimnology oxygen isotopes earth science paleoclimate paleolimnology carbon isotopes earth science paleoclimate paleolimnology geochemistry geoscientificInformation 5690 cal yr BP 5 cal yr BP Complete -37.014087 -37.014087 140.012913 140.012913 24 24 Continent Australia/New Zealand Australia South Australia Blue Lake SA>LATITUDE -37.014087>LONGITUDE 140.012913 None 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. English DOC/NOAA/NESDIS/NCEI National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce https://www.ncdc.noaa.gov/data-access/paleoclimatology-data DATA Center Contact Bruce Bauer bruce.a.bauer@noaa.gov paleo@noaa.gov 303-497-6280 303-497-6513

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Boulder CO 80305-3328 USA online ASCII Chris Gouramanis, Daniel Wilkins, Patrick De Deckker 2011 Palaeogeography, Palaeoclimatology, Palaeoecology 297 1 223-237 10.1016/j.palaeo.2010.08.005 http://www.sciencedirect.com/science/article/pii/S0031018210004955

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. Ostracod 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. The 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. STUDY NOTES: Ostracod geochemical (Mg/Ca, Sr/Ca, Na/Ca) and stable isotope (d18O, d13C) data and reconstructed salinity for the past 6,000 years from sediments collected in Blue Lake, South Australia.

GET DATA https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/blue2010ostracod.txt Formatted Text Data File; Blue Lake Ostracod Geochemical Data USA/NOAA DIF Version 9.8.4 2019-05-30 2019-05-30