# Wimmera Lakes, Australia Holocene Ostracod Salinity Reconstruction #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original publication, online resource and date accessed when using this data. # If there is no publication information, please cite Investigator, title, online resource and date accessed. # # Description/Documentation lines begin with # # Data lines have no # # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/22414 # Description: NOAA Landing Page # Online_Resource: http://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/australia/jacka2012.txt # Description: NOAA location of the template # # # Archive: Paleolimnology # # Parameter_Keywords: physical properties, oxygen isotopes, reconstruction #--------------------------------------- # Contribution_Date # Date: 2017-07-16 #--------------------------------------- # File_Last_Modified_Date # Date: 2017-07-16 #--------------------------------------- # Title # Study_Name: Wimmera Lakes, Australia Holocene Ostracod Salinity Reconstruction #--------------------------------------- # Investigators # Investigators: Kemp, J.; Radke, L.C.; Olley, J.; Juggins, S.; De Deckker, P. #--------------------------------------- # Description_Notes_and_Keywords # Description: Wimmera Lakes, Victoria, Australia Ostracod Holocene physical properties and d18O data and salinity reconstruction. # Provided Keywords: ostracods, salt lakes, Southern Hemisphere Westerlies, palaeohydrology, Murray Darling Basin, climate variability, transfer function, sea sediment core, late Pleistocene, south-Australia, New-Zealand, ice-core, younger dryas, rainfall variability, chemical diversity, western-Victoria, pollen evidence #--------------------------------------- # Publication # Authors: Justine Kemp, Lynda C. Radke, Jon Olley, Steve Juggins, Patrick De Deckker # Published_Date_or_Year: 2012-01-01 # Published_Title: Holocene lake salinity changes in the Wimmera, southeastern Australia, provide evidence for millennial-scale climate variability # Journal_Name: Quaternary Research # Volume: 77 # Edition: # Issue: 1 # Pages: 65-76 # Report Number: # DOI: 10.1016/j.yqres.2011.09.013 # Online_Resource: http://dx.doi.org/10.1016/j.yqres.2011.09.013 # Full_Citation: # Abstract: Palaeosalinity records for groundwater-influenced lakes in the southwest Murray Basin were constructed from an ostracod-based, weighted-averaging transfer function, supplemented with evidence from Campylodiscus clypeus (diatom), charophyte oogonia, Coxiella striata (gastropod), Elphidium sp. (foraminifera), Daphniopsis sp. ephippia (Cladocera), and brine shrimp (Parartemia zietziana) faecal pellets, the d18O of ostracods, and > 130 um quartz sand counts. The chronology is based on optically stimulated luminescence and calibrated radiocarbon ages. Relatively wet conditions are marked by lower salinities between 9600 yr and 5700 yr ago, but mutually exclusive high- and low-salinity ostracod communities suggest substantial variability in effective precipitation in the early Holocene. A drier climate was firmly in place by 4500 yr and is marked at the groundwater-dominated NW Jacka Lake by an increase in aeolian quartz and at Jacka Lake, by a switch from surface-water to groundwater dominance. Short-lived, low-salinity events at 8800, 7200, 5900, 4800, 2400, 1300 and 400 yr are similar in timing and number to those recorded on Australia's southern continental shelf, and globally, and provide evidence for the existence of the ~ 1500-yr cycle in mainland southern Australia. We surmise that these are cool events associated with periodic equatorward shifts in the westerly wind circulation. #--------------------------------------- # Funding_Agency # Funding_Agency_Name: Australian Commonwealth # Grant: Postgraduate Scholarship (L.Radke) #--------------------------------------- # Site Information # Site_Name: Jacka Lake # Location: Australia/New Zealand>Australia # Country: Australia # Northernmost_Latitude: -36.8 # Southernmost_Latitude: -36.8 # Easternmost_Longitude: 141.8 # Westernmost_Longitude: 141.8 # Elevation: 132 m #--------------------------------------- # Data_Collection # Collection_Name: Jacka2012 # First_Year: 7721 # Last_Year: -50 # Time_Unit: Cal. Yr BP # Core_Length: 0.15 m # Notes: Collected in 1994 #--------------------------------------- # Chronology_Information # Chronology: # # Lab ID ANU-9808 NWJ16 OZA033 NWJ68 ANU-9809 OZA034 ANU-9810 NWJ105 ANU-9811 OZA035 # Dated material Bulk Sediment Quartz sand Ostracod valves Quartz sand Bulk Sediment Ostracod valves Bulk Sediment Quartz sand Bulk sediment Ostracod valves # depth_bot (mm) 8 16 27 68 70 93 97 105 124 137.5 # depth_top (mm) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # age (bp) NaN 1540 NaN 4950 NaN NaN NaN 6700 NaN NaN # age14C (bp) 1130 NaN 3480 NaN 5410 6420 7200 NaN 5130 2420 # age_error (years) 70 215 90 470 90 100 110 800 320 110 # calibrated age (cal BP) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # 2-sigma error of cal age (years) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # cal_age_range_old (bp) 1167 NaN 3863 NaN 6298 7428 8161 NaN 6279 2669 # cal_age_range_young (2_s) 962 NaN 3638 NaN 6022 7261 7939 NaN 5587 2349 # depth (mm) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # thickness (mm) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # notes NW Jacka Lake NW Jacka Lake NW Jacka Lake NW Jacka Lake NW Jacka Lake NW Jacka Lake NW Jacka Lake NW Jacka Lake NW Jacka Lake NW Jacka Lake # # Lab ID ANU-9805 JL23 JL46 ANU-9806 JL66 ANU-9807 JL139 JL150 NaN NaN # Dated material Bulk sediment quartz sand quartz sand bulk sediment quartz sand bulk sediment quartz sand quartz sand NaN NaN # depth_bot (mm) 23 23 46 59 66 138 139 150 NaN NaN # depth_top (mm) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # age (bp) NaN -21 565 NaN 935 NaN 7450 6950 NaN NaN # age14C (bp) 460 NaN NaN 1350 NaN 5430 NaN NaN NaN NaN # age_error (years) 140 15 130 130 85 170 1000 1000 NaN NaN # calibrated age (cal BP) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # 2-sigma error of cal age (years) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # cal_age_range_old (bp) 632 NaN NaN 1385 NaN 6395 NaN NaN NaN NaN # cal_age_range_young (2_s) 317 NaN NaN 1191 NaN 5999 NaN NaN NaN NaN # depth (mm) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # thickness (mm) NaN NaN NaN NaN NaN NaN NaN NaN NaN NaN # notes Jacka Lake Jacka Lake Jacka Lake Jacka Lake Jacka Lake Jacka Lake Jacka Lake Jacka Lake NaN NaN # #--------------------------------------- # Variables # Data variables follow that are preceded by "##" in columns one and two. # Variables list, one per line, shortname-tab-longname components (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ## depth_cm depth, , , cm, , , , ,N, ## age_CE age, , , common era, , , , ,N, ## age_calBP age, , , calendar years before present, , , , ,N, ## log salinity_g/L log Salinity,,r2 between observed and estimated log salinity r2=0.91; root mean square error=0.167log10 units; root mean square error prediction =0.27log10 units,grams/litre,,paleolimnology,reconstruction from ostracod assemblage,salinity relationship of ecological assemblage based on modern ostracod training set,N, ## sand Sand,,,grams/dry weight sediment <130um,,paleolimnology,quartz sand grain,,N, # #------------------------ # Data # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Value: NA # depth_cm age_CE age_calBP log salinity_g/L sand 0 2000 -50 1.7162 16.43 6.5 1992 -42 1.732 8.46 10 1987 -37 1.7345 6.89 12.5 1984 -34 1.7269 2.06 18.5 1977 -27 1.7129 37.84 23.5 1952 -2 1.7115 697.23 28.5 1840 110 1.4474 211.89 30 1806 144 NA 30.66 31 1783 167 1.3522 21.00 32 1761 189 NA 28.23 33.5 1727 223 1.3016 15.92 35 1694 257 1.338 222.48 36 1671 279 1.3605 407.77 37.5 1637 313 1.3447 1269.72 38 1626 324 1.3715 30.00 39.5 1592 358 1.1143 146.28 40.5 1570 380 NA 74.68 41 1559 391 1.2912 NA 42 1536 414 NA 123.91 43 1514 436 NA 53.41 44 1491 459 NA 157.23 45 1469 481 NA 84.67 46 1446 504 0.9585 113.83 47 1424 526 1.2931 14.18 48 1401 549 0.95 5.62 49 1379 571 0.9332 6.43 50 1356 594 1.3048 8.93 51 1334 616 NA 12.99 52 1311 639 NA 7.83 53 1289 661 0.9868 0.72 54 1266 684 NA 22.76 55 1244 706 NA 2.71 56 1221 729 1.2634 13.70 57 1199 751 NA 23.93 59 1154 796 1.2746 5.16 60 1132 819 1.2891 85.02 61 1109 841 1.2851 0.63 62 1087 863 1.3064 22.30 63 1064 886 NA 1.65 64 1042 908 0.9784 1.51 65 1019 931 0.9347 5.41 66 997 953 0.8515 120.93 68 825 1125 NA 178.04 70 682 1268 0.7921 26.32 72 538 1412 0.7938 16.80 74 395 1555 NA 76.67 76 251 1699 NA 95.40 77.5 144 1806 0.8458 109.15 78.5 72 1878 NA 118.43 81 -107 2057 NA 32.73 83 -250 2200 NA 66.33 84.5 -358 2308 NA 0.00 86.5 -501 2451 NA 23.88 89 -681 2631 0.8528 2.84 91.5 -860 2810 1.228 10.91 93 -967 2917 1.0253 15.94 95 -1111 3061 1.2712 75.49 97 -1254 3204 NA 5.84 99 -1398 3348 NA 1.81 101 -1541 3491 NA 3.38 102.5 -1649 3599 0.8024 37.04 105 -1828 3778 NA 0.00 107 -1971 3921 NA 7.08 110 -2186 4136 NA 0.00 113 -2401 4351 0.7693 6.77 117 -2688 4638 NA 0.00 120 -2903 4853 NA 5.67 123.5 -3154 5104 NA 12.74 125 -3262 5212 NA 3.00 130 -3620 5570 0.9594 2.02 134 -3907 5857 NA 33.83 138 -4194 6144 NA 2.16 139 -4266 6216 NA 375.33 140 -4337 6287 NA 1204.71 141 -4409 6359 NA 1181.89 142 -4481 6431 NA 3194.07 144 -4624 6574 NA 3066.67 146.5 -4803 6753 NA 453.98 150 -5054 7004 NA 1110.86 156 -5771 7721 NA 434.60