# Lake Winnipeg, Eastern Canadian Prairies 1000-year 18O oxygen isotope data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/noaa-templates/data-version-1.0.0/Winnipeg.Buhay.2009.txt # Online_Resource_Description: This file. NOAA WDS Paleo formatted metadata and data for version 1.0.0 of this dataset. # # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/pages2k/NAm2kHydro-2017/data-version-1.0.0/Winnipeg.Buhay.2009.lpd # Online_Resource_Description: Linked Paleo Data (LiPD) formatted file containing the same metadata and data as this file, for version 1.0.0 of this dataset. # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/23087 # Online_Resource_Description: Landing Page for this study.# # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Paleolimnology # Parameter_Keywords: oxygen isotopes # Dataset_DOI: # #------------------ # Contribution_Date # Date: 2017-11-13 #------------------ # File_Last_Modified_Date # Modified_Date: 2017-11-13 #------------------ # Title # Study_Name: Lake Winnipeg, Eastern Canadian Prairies 1000-year 18O oxygen isotope data #------------------ # Investigators # Investigators: Buhay, W.M.; Simpson, S.; Thorleifson, H.; Lewis, M.; King, J.; Telka, A.; Wilkinson, P.; Babb, J.; Timsic, S.; Bailey, D. #------------------ # Description_Notes_and_Keywords # Description: #------------------ # Publication # Authors: Buhay, William Mark; Simpson, Shawna; Thorleifson, Harvey; Lewis, Mike; King, John; Telka, Alice; Wilkinson, Paul; Babb, Jeff; Timsic, Sandra; Bailey, Dan # Published_Date_or_Year: 2009 # Published_Title: A 1000-year record of dry conditions in the eastern Canadian prairies reconstructed from oxygen and carbon isotope measurements on Lake Winnipeg sediment organics # Journal_Name: Journal of Quaternary Science # Volume: 24 # Edition: # Issue: 5 # Pages: # Report: # DOI: 10.1002/jqs.1293 # Online_Resource: doi.org # Full_Citation: # Abstract: A short sediment core (162 cm), covering the period AD 920–1999, was sampled from the south basin of Lake Winnipeg for a suite of multi-proxy analyses leading towards a detailed characterisation of the recent millennial lake environment and hydroclimate of southern Manitoba, Canada. Information on the frequency and duration of major dry periods in southern Manitoba, in light of the changes that are likely to occur as a result of an increasingly warming atmosphere, is of specific interest in this study. Intervals of relatively enriched lake sediment cellulose oxygen isotope values (δ18Ocellulose) were found to occur from AD 1180 to 1230 (error range: AD 1104–1231 to 1160–1280), 1610–1640 (error range: AD 1571–1634 to 1603–1662), 1670–1720 (error range: AD 1643–1697 to 1692–1738) and 1750–1780 (error range: AD 1724–1766 to 1756–1794). Regional water balance, inferred from calculated Lake Winnipeg water oxygen isotope values (δ18Oinf-lw), suggest that the ratio of lake evaporation to catchment input may have been 25–40% higher during these isotopically distinct periods. Associated with the enriched δ18Ocellulose intervals are some depleted carbon isotope values associated with more abundantly preserved sediment organic matter (δ13COM). These suggest reduced microbial oxidation of terrestrially derived organic matter and/or subdued lake productivity during periods of minimised input of nutrients from the catchment area. With reference to other corroborating evidence, it is suggested that the AD 1180–1230, 1610–1640, 1670–1720 and 1750–1780 intervals represent four distinctly drier periods (droughts) in southern Manitoba, Canada. Additionally, lower-magnitude and duration dry periods may have also occurred from 1320 to 1340 (error range: AD 1257–1363), 1530–1540 (error range: AD 1490–1565 to 1498–1572) and 1570–1580 (error range: AD 1531–1599 to 1539–1606). #------------------ # Funding_Agency # Funding_Agency_Name: Manitoba Hydro; Geological Survey of Canada # Grant: #------------------ # Site_Information # Site_Name: Lake Winnipeg # Location: Manitoba # Country: # Northernmost_Latitude: 50.57 # Southernmost_Latitude: 50.57 # Easternmost_Longitude: -96.83 # Westernmost_Longitude: -96.83 # Elevation: 217 #------------------ # Data_Collection # Collection_Name: Winnipeg.Buhay.2009 # Earliest_Year: 993.149 # Most_Recent_Year: -47.965 # Time_Unit: BP # Core_Length: # Notes: #------------------ # Species # Species_Name: # Species_Code: # Common_Name: #------------------ # Chronology: # #------------------ # Variables # # Data variables follow that are preceded by "##" in columns one and two. # Data line variables format: Variables list, one per line, shortname-tab-longname-tab-longname components ( 10 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data, additional_information) # ##year age,,,year CE,,,,,N ##d18O delta 18O,cellulose,,permil SMOW,,paleolimnologhy, ,,N,oxygen isotopes from cellulose;sediment-extracted cellulose ##age age, , , calendar years before present, , , , ,N ##depth depth,,,cm,,,,,N, ##d13C delta 13O, organic matter, ,permil (VPDB), ,paleolimnology, ,,N,carbon isotopes from sediment organic matter;organic matter sediment samples sieved at 500 um # #------------------ # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header) # Missing_Values: nan # year d18O age depth d13C 1997.965 5.681 -47.965 1.0 -27.801 1995.846 6.066 -45.846 2.0 -25.896 1993.763 11.209 -43.763 3.0 -25.672 1991.753 12.383 -41.753 4.0 -25.805 1989.722 11.445 -39.722 5.0 -25.767 1987.895 12.407 -37.895 6.0 -25.94 1985.984 8.154 -35.984 7.0 -25.963 1983.728 10.828 -33.728 8.0 -26.125 1981.09 7.796 -31.09 9.0 -26.111 1978.002 4.757 -28.002 10.0 -26.056 1975.365 3.567 -25.365 11.0 -26.027 1973.199 10.988 -23.199 12.0 -26.114 1970.03 5.821 -20.03 13.0 -26.304 1965.836 8.273 -15.836 14.0 -26.463 1961.317 8.017 -11.317 15.0 -26.584 1956.34 8.23 -6.34 16.0 -26.852 1950.577 7.927 -0.577 17.0 -26.699 1944.74 8.694 5.26 18.0 -26.103 1938.76 9.775 11.24 19.0 -26.306 1933.002 6.233 16.998 20.0 -26.437 1928.208 9.78 21.792 21.0 -26.297 1923.136 11.607 26.864 22.0 -26.418 1917.816 9.998 32.184 23.0 -26.551 1912.643 8.194 37.357 24.0 -26.5 1908.611 7.659 41.389 25.0 -26.411 1905.042 8.424 44.958 26.0 -26.419 1901.854 9.023 48.146 27.0 -26.451 1899.474 8.851 50.526 28.0 -26.441 1896.213 9.155 53.787 29.0 -26.512 1891.837 8.27 58.163 30.0 -26.585 1886.155 8.394 63.845 31.0 -26.51 1879.667 9.335 70.333 32.0 -26.683 1873.023 10.225 76.977 33.0 -26.437 1864.718 9.175 85.282 34.0 -26.704 1857.662 9.931 92.338 35.0 -26.496 1850.279 9.02 99.721 36.0 -26.662 1842.895 9.629 107.105 37.0 -26.469 1835.511 8.773 114.489 38.0 -26.523 1828.128 8.918 121.872 39.0 -26.391 1820.744 8.858 129.256 40.0 -26.528 1813.36 9.38 136.64 41.0 -26.331 1805.976 9.027 144.024 42.0 -26.186 1798.593 8.625 151.407 43.0 -26.502 1791.209 8.993 158.791 44.0 -26.349 1783.825 8.195 166.175 45.0 -26.462 1776.442 12.048 173.558 46.0 -26.454 1769.058 11.2 180.942 47.0 -26.54 1761.674 9.297 188.326 48.0 -26.318 1754.291 9.077 195.709 49.0 -26.554 1746.907 10.642 203.093 50.0 -26.251 1739.523 8.498 210.477 51.0 -26.087 1732.139 9.397 217.861 52.0 -26.215 1724.756 7.086 225.244 53.0 -26.311 1717.372 10.51 232.628 54.0 -26.33 1709.988 10.088 240.012 55.0 -26.412 1702.605 10.853 247.395 56.0 -26.411 1695.221 11.327 254.779 57.0 -26.231 1687.837 11.258 262.163 58.0 -25.956 1680.454 5.083 269.546 59.0 -26.242 1673.07 12.041 276.93 60.0 -26.243 1665.686 11.154 284.314 61.0 -26.272 1658.302 7.35 291.698 62.0 -26.366 1650.919 7.058 299.081 63.0 -26.395 1643.535 8.79 306.465 64.0 -26.152 1636.151 7.996 313.849 65.0 -26.315 1628.768 12.691 321.232 66.0 -26.092 1621.384 10.861 328.616 67.0 -26.144 1614.0 12.22 336.0 68.0 -26.257 1606.617 5.251 343.383 69.0 -26.272 1599.233 5.819 350.767 70.0 -26.284 1591.849 4.725 358.151 71.0 -26.33 1584.465 10.029 365.535 72.0 -26.464 1577.082 6.782 372.918 73.0 -26.35 1569.698 10.246 380.302 74.0 -26.253 1562.314 6.388 387.686 75.0 -26.264 1554.931 7.701 395.069 76.0 -26.119 1547.547 8.226 402.453 77.0 -26.082 1540.163 8.399 409.837 78.0 -26.159 1532.78 9.976 417.22 79.0 -26.531 1525.396 8.298 424.604 80.0 -26.237 1518.012 6.89 431.988 81.0 -26.374 1510.628 6.71 439.372 82.0 -26.27 1503.245 6.929 446.755 83.0 -25.849 1495.861 5.701 454.139 84.0 -26.212 1488.477 7.204 461.523 85.0 -26.117 1481.094 6.712 468.906 86.0 -26.286 1473.71 8.592 476.29 87.0 -26.23 1466.326 8.098 483.674 88.0 -26.224 1458.943 8.253 491.057 89.0 -26.364 1451.559 5.291 498.441 90.0 -26.339 1444.175 8.208 505.825 91.0 -26.096 1436.791 7.997 513.209 92.0 -26.229 1429.408 8.378 520.592 93.0 -26.277 1422.024 8.399 527.976 94.0 -26.218 1414.64 6.152 535.36 95.0 nd 1407.257 7.752 542.743 96.0 -26.151 1399.873 5.265 550.127 97.0 -26.266 1392.489 8.495 557.511 98.0 -25.898 1385.106 6.604 564.894 99.0 -25.924 1377.722 6.288 572.278 100.0 -25.915 1370.338 6.616 579.662 101.0 -25.922 1362.954 8.028 587.046 102.0 -26.14 1355.571 6.116 594.429 103.0 -26.048 1348.187 7.892 601.813 104.0 -26.11 1340.803 8.663 609.197 105.0 -26.379 1333.42 9.473 616.58 106.0 -26.135 1326.036 8.337 623.964 107.0 -26.057 1318.652 9.165 631.348 108.0 -26.065 1311.269 8.073 638.731 109.0 -26.178 1303.885 7.858 646.115 110.0 -26.262 1296.501 8.503 653.499 111.0 -26.415 1289.117 8.155 660.883 112.0 -26.299 1281.734 8.715 668.266 113.0 -26.202 1274.35 8.225 675.65 114.0 -26.023 1266.966 9.309 683.034 115.0 -26.036 1259.583 8.189 690.417 116.0 -25.925 1252.199 8.92 697.801 117.0 -26.121 1244.815 9.236 705.185 118.0 -26.233 1237.432 8.236 712.568 119.0 -26.338 1230.048 8.2 719.952 120.0 -26.359 1222.664 10.228 727.336 121.0 -26.263 1215.28 10.582 734.72 122.0 -26.156 1207.897 9.914 742.103 123.0 -26.308 1200.513 9.842 749.487 124.0 -26.188 1193.129 9.53 756.871 125.0 -26.375 1185.746 9.339 764.254 126.0 -26.279 1178.362 10.618 771.638 127.0 -26.414 1170.978 6.984 779.022 128.0 -26.818 1163.595 7.859 786.405 129.0 -26.088 1156.211 8.768 793.789 130.0 -26.199 1148.827 6.523 801.173 131.0 -26.18 1141.443 7.08 808.557 132.0 -26.222 1134.06 6.73 815.94 133.0 -26.209 1126.676 5.298 823.324 134.0 -26.17 1119.292 5.564 830.708 135.0 -25.899 1111.909 4.128 838.091 136.0 -26.009 1104.525 8.243 845.475 137.0 -25.86 1097.141 7.301 852.859 138.0 -25.693 1089.758 3.124 860.242 139.0 -25.728 1082.374 4.048 867.626 140.0 -25.762 1074.99 5.981 875.01 141.0 -26.236 1067.606 8.492 882.394 142.0 -26.254 1060.223 8.159 889.777 144.0 -26.281 1052.839 7.353 897.161 145.0 -26.085 1045.455 6.041 904.545 146.0 -25.865 1038.072 5.521 911.928 147.0 -26.018 1030.688 6.112 919.312 148.0 -26.083 1023.304 6.837 926.696 149.0 -25.994 1015.921 7.544 934.079 150.0 -26.256 1008.537 6.517 941.463 151.0 -26.019 1001.153 7.816 948.847 152.0 -26.278 993.769 7.837 956.231 153.0 -26.275 986.386 6.91 963.614 154.0 -26.102 979.002 8.485 970.998 155.0 -26.096 971.618 5.284 978.382 156.0 -26.098 964.235 5.612 985.765 157.0 -27.062 956.851 7.506 993.149 158.0 -26.089