Southeast Australia 1,500 Year Crater Lake Salinity Reconstructions Barr, C.; Tibby, J.; Gell, P.; Tyler, J.J.; Zawadzki, A.; Jacobson, G.E. Barr, C. Tibby, J. Gell, P. Tyler, J.J. Zawadzki, A. Jacobson, G.E. earth science/paleoclimate/climate reconstructions|paleolimnology (electrical conductivity,diatom assemblage|lake water,dissimilarity measure,dimensionless,null,climate reconstructions|paleolimnology,null,modern analogue technique,N,Minimum Dissimilarity from closest modern analogue; Samples with minimum dissimilarity coefficient greater/equal to highest 10th percentile (131.493) are considered to have good modern analogues) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,year Common Era,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (age,null,null,calendar year before present,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (electrical conductivity,diatom assemblage|lake water,null,microsiemens per centimeter,null,climate reconstructions|paleolimnology,null,modern analogue technique,N,null) earth science/paleoclimate/climate reconstructions|paleolimnology (depth,null,null,centimeter,null,climate reconstructions|paleolimnology,null,null,N,null) earth science/paleoclimate/paleolimnology (Lake Elingamite>LATITUDE -38.35>LONGITUDE 143) (Lake Surprise>LATITUDE -38.06>LONGITUDE 141.92) Climates of the last two millennia have been the focus of numerous studies due to the availability of high-resolution palaeoclimate records and the occurrence of divergent periods of climate, commonly referred to as the 'Medieval Climatic Anomaly' and 'The Little Ice Age'. The majority of these studies are centred in the Northern Hemisphere and, in comparison, the Southern Hemisphere is relatively under-studied. In Australia, there are few high-resolution, palaeoclimate studies spanning a millennium or more and, consequently, knowledge of long-term natural climate variability is limited for much of the continent. South-eastern Australia, which recently experienced a severe, decade-long drought, is one such region. Results are presented of investigations from two crater lakes in the south-east of mainland Australia. Fluctuations in lake-water conductivity, a proxy for effective moisture, are reconstructed at sub-decadal resolution over the past 1500 years using a statistically robust, diatom-conductivity transfer function. These data are interpreted in conjunction with diatom autecology. The records display coherent patterns of change at centennial scale, signifying that both lakes responded to regional-scale climate forcing, though the nature of that response varied between sites due to differing lake morphometry. Both sites provide evidence for a multi-decadal drought, commencing ca 650 AD, and a period of variable climate between ca 850 and 1400 AD. From ca 1400-1880 AD, coincident with the timing of the 'Little Ice Age', climates of the region are characterised by high effective moisture and a marked reduction in inter-decadal variability. The records provide context for climates of the historical period and reveal the potential for more extreme droughts and more variable climate than that experienced since European settlement of the region ca 170 years ago. STUDY NOTES: Diatom modern-analougue technique salinity reconstruction for 2 lakes in Victoria, southeast Australia, for the past 1,500 years. NCDC-Paleoclimatology https://www.ncdc.noaa.gov/data-access/paleoclimatology-data - Bauer Bruce Investigator : Barr, C. Investigator : Tibby, J. Investigator : Gell, P. Investigator : Tyler, J.J. Investigator : Zawadzki, A. Investigator : Jacobson, G.E. 2017-07-10 ONLINE Files online, ASCII https://www.ncdc.noaa.gov/paleo/study/22432 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/surprise2014.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/elingamite2014.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/surprise2014.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/elingamite2014.txt English https://www.ncdc.noaa.gov/paleo/study/22432 https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/surprise2014.txt https://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/elingamite2014.txt Cameron Barr, John Tibby, Peter Gell, Jonathan Tyler, Atun Zawadzki, Geraldine E. Jacobson2014Climate variability in south-eastern Australia over the last 1500 years inferred from the high-resolution diatom records of two crater lakesQuaternary Science Reviews95115-13110.1016/j.quascirev.2014.05.001http://www.sciencedirect.com/science/article/pii/S0277379114001644 Jonathan J. Tyler, Keely Mills, Cameron Barr, J.M. Kale Sniderman, Peter A. Gell, David J. Karoly2015Identifying coherent patterns of environmental change between multiple, multivariate records: an application to four 1000-year diatom records from Victoria, AustraliaQuaternary Science Reviews11994-10510.1016/j.quascirev.2015.04.010http://www.sciencedirect.com/science/article/pii/S0277379115001523 START YEAR: 1472 cal yr BP * END YEAR: -54 cal yr BP 141.92 -38.35 143 -38.06