Lake Keilambete, SE Australia Holocene Sediment Data and Lake Level Wilkins, D.; De Deckker, P.; Fifield, L.K.; Gouramanis, C.; Olley, J. Wilkins, D. De Deckker, P. Fifield, L.K. Gouramanis, C. Olley, J. hydrology earth science/paleoclimate/climate reconstructions|paleolimnology (strontium/calcium,strontium/calcium,null,millimole per mole,null,climate reconstructions|paleolimnology,null,null,N,Calculated Sr/Ca ratio of water from measured Sr/Ca of Diacypris compacta ostracod test; reconstructed using partition coefficients of Gouramanis and De Deckker (2010)) earth science/paleoclimate/paleolimnology (identified ostracod,null,null,count,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (strontium/calcium,ostracod,null,millimole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,Sr/Ca ratio in Diacypris compacta ostracod valve) earth science/paleoclimate/climate reconstructions|lake levels|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|lake levels|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|lake levels|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,Midpoint depth of sample) earth science/paleoclimate/paleolimnology (organic matter,dry sediment,null,percent,null,paleolimnology,null,loss on ignition,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (depth at sample end,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,Top depth of sample) earth science/paleoclimate/paleolimnology (identified ostracod,null,null,count,null,paleolimnology,null,null,N,Diacypris compacta Ostracod tests) earth science/paleoclimate/paleolimnology (identified ostracod,null,null,count,null,paleolimnology,null,null,N,Reticypris clava Ostracod tests) earth science/paleoclimate/climate reconstructions|lake levels (lake level,null,null,meter,null,climate reconstructions|lake levels,null,null,N,lake depth in meters; determined through changes in sediment size) earth science/paleoclimate/climate reconstructions|paleolimnology (strontium/calcium,strontium/calcium,null,millimole per mole,null,climate reconstructions|paleolimnology,null,null,N,Calculated Sr/Ca ratio of water from measured Sr/Ca of Australocypris robusta ostracod test; reconstructed using partition coefficients of Gouramanis and De Deckker (2010)) earth science/paleoclimate/paleolimnology (strontium/calcium,ostracod,null,millimole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,Sr/Ca ratio in Reticypris sp. ostracod valve) earth science/paleoclimate/paleolimnology (delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,M. praenuncia ostracod tests) earth science/paleoclimate/paleolimnology (depth at sample start,null,null,centimeter,null,paleolimnology,null,null,N,Bottom depth of sample) earth science/paleoclimate/paleolimnology (depth at sample start,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (water content,sediment,null,percent,null,paleolimnology,null,null,N,percent of dry weight) earth science/paleoclimate/paleolimnology (strontium/calcium,ostracod,null,millimole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,Sr/Ca ratio in Australocypris robusta ostracod valve) earth science/paleoclimate/paleolimnology (strontium/calcium,ostracod,null,millimole per mole,null,paleolimnology,null,inductively-coupled plasma mass spectrometry,N,Sr/Ca ratio in Mytilocypris praenuncia ostracod valve) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (depth,null,null,centimeter,null,paleolimnology,null,null,N,Equivalent depths between cores extracted from the same lake; laminae sequences used to correlate depths between cores) earth science/paleoclimate/paleolimnology (magnetic susceptibility,sediment,null,dimensionless (CGS system),null,paleolimnology,null,null,N,multi-sensor core logger) earth science/paleoclimate/paleolimnology (depth at sample end,null,null,centimeter,null,paleolimnology,null,null,N,Top depth of sample) earth science/paleoclimate/paleolimnology (event layer,sediment,null,count,null,paleolimnology,null,null,N,number of laminae within a one centimeter interval) earth science/paleoclimate/paleolimnology (delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,A. beccarii ostracod tests) earth science/paleoclimate/climate reconstructions|lake levels (lake level,null,unspecified margin of error,meter,null,climate reconstructions|lake levels,null,null,N,lake depth 2 meter curve fitting error; three point running mean) 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 of MAT=0.3 R2=0.85; Modern Analogue Technique based on 491 modern salinity measurements) earth science/paleoclimate/paleolimnology (calcium carbonate,sediment,null,percent,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (grain size class,sediment,null,percent,null,paleolimnology,null,null,N,percentage of sediment with grain size greater than 63um) earth science/paleoclimate/paleolimnology (depth at sample end,null,null,centimeter,null,paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,Midpoint depth of sample) earth science/paleoclimate/paleolimnology (identified ostracod,null,null,count,null,paleolimnology,null,null,N,Diacypris dietzi Ostracod tests) earth science/paleoclimate/paleolimnology (identified ostracod,null,null,count,null,paleolimnology,null,null,N,Platycypris baueri Ostracod tests) earth science/paleoclimate/paleolimnology (identified ostracod,null,null,count,null,paleolimnology,null,null,N,Mytilocypris praenuncia Ostracod tests) earth science/paleoclimate/climate reconstructions|paleolimnology (total dissolved solids,ostracod assemblage,one standard error,milligram per liter,null,climate reconstructions|paleolimnology,null,modern analogue technique,N,Modern Analogue Technique based on 491 modern salinity measurements) earth science/paleoclimate/paleolimnology (delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,D. compacta ostracod tests) earth science/paleoclimate/climate reconstructions|paleolimnology (strontium/calcium,strontium/calcium,null,millimole per mole,null,climate reconstructions|paleolimnology,null,null,N,Calculated Sr/Ca ratio of water from measured Sr/Ca of Mytilocypris praenuncia ostracod test; reconstructed using partition coefficients of Gouramanis and De Deckker (2010)) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,Best rounded to whole year) earth science/paleoclimate/paleolimnology (density,sediment,null,gram per cubic centimeter,null,paleolimnology,null,gamma ray attenuation porosity evaluation,N,gamma-ray attenuation; multi-sensor core logger) earth science/paleoclimate/paleolimnology (identified ostracod,null,null,count,null,paleolimnology,null,null,N,Australocypris robusta Ostracod tests) earth science/paleoclimate/climate reconstructions|paleolimnology (strontium/calcium,strontium/calcium,null,millimole per mole,null,climate reconstructions|paleolimnology,null,null,N,Calculated Sr/Ca ratio of water from measured Sr/Ca of Reticypris sp. ostracod test; reconstructed using partition coefficients of Gouramanis and De Deckker (2010)) earth science/paleoclimate/paleolimnology (age,null,null,calendar kiloyear before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,null) earth science/paleoclimate/paleolimnology (delta 18O,ostracod,null,per mil VPDB,null,paleolimnology,null,isotope ratio mass spectrometry,N,A. robusta ostracod tests) earth science/paleoclimate/paleolimnology (age,null,null,calendar year before present,null,paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (depth at sample start,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,Bottom depth of sample) earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology earth science/paleoclimate/paleolimnology (Lake Keilambete>LATITUDE -38.207>LONGITUDE 142.878) Reconstructed Holocene lake-level curves from two saline, hydrologically closed maar crater lakes in southwestern Victoria, Australia, show near synchronous lake-level changes throughout the Holocene. We show that lake levels, reconstructed from sediment particle size and ostracod valve chemistry (d18O and Sr/Ca) have undergone rapid (<100 yr), large (>10 m) fluctuations throughout the Holocene. Finer sampling resolution shows a more sensitive response to Holocene climate than was previously presented for Lake Keilambete. Both maar crater lakes show a short-lived maximum in Holocene lake levels around 7.2 ka. The period of lake filling leading to peak lake levels matches the phase of most effective precipitation (7.4-7.0 ka) reconstructed from a high-resolution speleothem record from northern Tasmania. Water levels declined in both lakes during the mid Holocene, with a more substantive decline after ~5 ka which coincides with the end of the Southern Hemisphere hypsithermal. Water levels continued to oscillate with a periodicity of around 300-700 years, before reaching a late-Holocene nadir around 1.8 ka (Keilambete) and 1.3 ka (Gnotuk). The trend and periodicity of oscillations in the maar water levels show commonalities to dD in the Dome C ice core, and suggest that temperature may be a significant component in influencing the Precipitation/Evaporation (P/E) ratio in southeastern Australia during the Holocene. STUDY NOTES: Multiproxy Holocene sediment data and lake level reconstructions from Lake Keilambete, southwestern Victoria, Australia NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Wilkins, D. Investigator : De Deckker, P. Investigator : Fifield, L.K. Investigator : Gouramanis, C. Investigator : Olley, J. 2017-07-10 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22430 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013loi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013carb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013ms.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013lam.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013ost.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013depth.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013loi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013carb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013ms.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013lam.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013ost.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013depth.txt English https://www.ncdc.noaa.gov/paleo/study/22430 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013loi.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013carb.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013ms.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013lam.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013ost.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013d18o.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/keilambete2013depth.txt Daniel Wilkins, Chris Gouramanis, Patrick De Deckker, L. Keith Fifield, Jon Olley2013Holocene lake-level fluctuations in Lakes Keilambete and Gnotuk, southwestern Victoria, Australia The Holocene236784-79510.1177/0959683612471983http://journals.sagepub.com/doi/10.1177/0959683612471983 Daniel Wilkins, Patrick De Deckker, L. Keith Fifield, Chris Gouramanis, Jon Olley2012Comparative optical and radiocarbon dating of laminated Holocene sediments in two maar lakes: Lake Keilambete and Lake Gnotuk, south-western Victoria, AustraliaQuaternary Geochronology93-1510.1016/j.quageo.2012.01.008http://www.sciencedirect.com/science/article/pii/S1871101412000106 START YEAR: 9550 cal yr BP * END YEAR: -54 cal yr BP 142.878 -38.207 142.878 -38.207