# Big Round Lake, Baffin Island Varve Thickness Data #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # 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://www.ncdc.noaa.gov/cdo/f?p=519:1:::::P1_STUDY_ID:6203 # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/24611 # # Original_Source_URL: http://www1.ncdc.noaa.gov/pub/data/paleo/paleolimnology/northamerica/canada/baffin/big-round2008.txt # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Lake Cores #-------------------- # Contribution_Date # Date: 2008-11-01 #-------------------- # Title # Study_Name: Big Round Lake, Baffin Island Varve Thickness Data #-------------------- # Investigators # Investigators: Thomas, E.K.; Briner, J.P. #-------------------- # Description_and_Notes # Description: Varve thickness and varve-inferred July-August September temperature from Big Round Lake, Baffin Island, Nunavut, Canada: 69deg 52'N, 68deg 50'W, 180m elev. #-------------------- # Publication # Authors: Thomas, E.K.; Briner, J.P. # Published_Date_or_Year: 2009 # Published_Title: Climate of the past millennium inferred from varved proglacial lake sediments on northeast Baffin Island, Arctic Canada. # Journal_Name: Journal of Paleolimnology # Volume: 41 # Edition: 1 # Issue: # Pages: 209-224 # DOI: 10.1007/s10933-008-9258-7 # Online_Resource: # Full_Citation: Thomas, E.K. and J.P. Briner. 2009. Climate of the past millennium inferred from varved proglacial lake sediments on northeast Baffin Island, Arctic Canada. Journal of Paleolimnology, 41(1), 209-224. doi: 10.1007/s10933-008-9258-7 # Abstract: This study uses 239+240Pu-dated varved sediments from Big Round Lake, a proglacial lake on northeast Baffin Island, Arctic Canada to generate a 1000-year-long, annual-resolution record of past climate. Varve thickness is positively correlated with July-August-September temperature measured at Clyde River, 70 km to the north of the lake (r = 0.46, p<0.001). We therefore interpret the variability and trends in varve thickness to partially represent summer temperature. The coolest Little Ice Age temperatures occurred in this record from 1575 to 1760 AD and were approximately 1.5C cooler than today (average from 1995 to 2005 AD) and 0.2C cooler than the last millennium (average from 1000 to 2000 AD). Pre-twentieth-century warmth occurred during two intervals, 970-1150 AD and 1375-1575 AD; temperatures were approximately 1.2C cooler than today, but 0.1C warmer than the last millennium. The Big Round Lake varve-thickness record contains features similar to that reconstructed elsewhere in the eastern Canadian Arctic. This high-resolution quantitative record expands our understanding of arctic climate during the past millennium. #------------------ # Authors: Anderson, D.M., Tardif, R., Horlick, K., Erb, M.P., Hakim, G.J., Noone, D., Perkins, W.A., and E. Steig # Published_Date_or_Year: 2018 # Published_Title: Additions to the last millennium reanalysis multi-proxy database # Journal_Name: Data Science Journal # Volume: # Edition: # Issue: # Pages: # Report_Number: # DOI: # Online_Resource: # Full_Citation: Anderson, D.M., Tardif, R., Horlick, K., Erb, M.P., Hakim, G., J., Noone, D., Perkins, W.A., and E. Steig, submitted. Additions to the last millennium reanalysis multi-proxy database. Data Science Journal. # Abstract: Progress in paleoclimatology increasingly occurs via data syntheses. We describe additions to a collection prepared for use in paleoclimate state estimation, specifically the Last Millennium Reanalysis (LMR). The 2290 additional series include 2152 tree ring chronologies and 138 other series. They supplement the collection used previously and together form a database titled LMRdb 1.0.0. The additional data draws from lake core, ice core, coral, speleothem, and tree ring archives, using published data primarily from the NOAA Paleoclimatology archive and a set of tree ring width chronologies standardized from raw International Tree Ring Data Bank ring width series. In contrast to many previous paleo compilations, the data were not selected (screened) on the basis of their environmental correlation, multi-century length, or other attributes. The inclusion of proxies sensitive to moisture and other environmental variables expands their use in data assimilation. A preliminary calibration using linear regression with mean annual temperature reveals characteristics of the proxy series and their relationship to temperature, as well as the noise and error characteristics of the records. The additional records are structured as individual files in the NOAA Paleoclimatology format and archived at NOAA Paleoclimatology (Anderson et al. 2018) and will continue to be improved and expanded as part of the LMR Project. The additions represent a four-fold increase in the number of records available for assimilation, provide expanded geographic coverage, and add additional proxy variables. Applications include data assimilation, proxy system model development, and paleoclimate reconstruction using climate field reconstruction and other methods. #------------------ # Funding_Agency # Funding_Agency_Name: US National Science Foundation # Grant: Graduate Research Fellowship #------------------ # Funding_Agency # Funding_Agency_Name: Geological Society of America # Grant: student research grant #------------------ # Funding_Agency_Name: National Science Foundation # Grant:AGS-1304263 # Funding_Agency_Name: National Oceanic and Atmospheric Administration # Grant:NA14OAR4310176 #------------------ # Site_Information # Site_Name: Big Round Lake, Baffin Island, Canada # Location: North America>Canada # Country: Canada # Northernmost_Latitude: 69.866 # Southernmost_Latitude: 69.866 # Easternmost_Longitude: -68.833 # Westernmost_Longitude: -68.833 # Elevation: 180 m #------------------ # Data_Collection # Collection_Name: 09cana01a # Earliest_Year: 971 # Most_Recent_Year: 2003 # Time_Unit: y_ad # Core_Length: # Notes: {"database":"LMR"} #------------------ # Species # Species_Name: # 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 (9 components: what, material, error, units, seasonality, archive, detail, method, C or N for Character or Numeric data) # ##age age, , ,y_ad, , Lake Cores, , ,N ##varve varve thickness, varve sediment, , , , Lake Cores, , ,N # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: NAN # age varve 2003 1.35 2002 1.571 2001 1.126 2000 1.51 1999 0.974 1998 0.695 1997 0.479 1996 0.762 1995 0.814 1994 0.815 1993 0.58 1992 0.493 1991 1.629 1990 0.57 1989 0.721 1988 0.985 1987 0.833 1986 0.538 1985 0.467 1984 0.69 1983 1.3 1982 0.579 1981 0.959 1980 0.479 1979 0.498 1978 0.417 1977 0.884 1976 1.466 1975 1.245 1974 1.078 1973 1.143 1972 0.257 1971 0.885 1970 1.004 1969 0.626 1968 0.819 1967 0.676 1966 2.146 1965 0.729 1964 1.167 1963 1.1 1962 1.107 1961 1.136 1960 0.841 1959 1.254 1958 1.152 1957 0.972 1956 1.065 1955 0.709 1954 1.393 1953 1.811 1952 1.514 1951 1.357 1950 0.773 1949 0.975 1948 0.942 1947 1.028 1946 0.78 1945 0.846 1944 0.757 1943 1.38 1942 1.229 1941 1.397 1940 0.891 1939 1.192 1938 2.755 1937 1.209 1936 1.39 1935 1.676 1934 2.896 1933 1.26 1932 0.632 1931 0.947 1930 0.925 1929 0.816 1928 1.154 1927 0.913 1926 1.184 1925 0.239 1924 1.187 1923 0.572 1922 0.689 1921 0.209 1920 0.492 1919 0.453 1918 0.892 1917 1.904 1916 0.562 1915 0.453 1914 0.798 1913 1.042 1912 0.749 1911 0.709 1910 0.314 1909 1.571 1908 0.719 1907 1.069 1906 0.999 1905 0.289 1904 1.276 1903 1.088 1902 0.686 1901 1.024 1900 0.502 1899 0.623 1898 0.556 1897 0.811 1896 0.692 1895 0.375 1894 1.042 1893 0.439 1892 1.213 1891 0.997 1890 0.638 1889 0.41 1888 0.283 1887 0.658 1886 1.2 1885 0.799 1884 1.256 1883 0.831 1882 0.545 1881 0.903 1880 0.246 1879 0.267 1878 0.205 1877 0.6 1876 0.444 1875 0.471 1874 0.412 1873 0.255 1872 0.577 1871 0.942 1870 1.491 1869 1.504 1868 0.249 1867 0.468 1866 0.372 1865 0.403 1864 0.283 1863 0.405 1862 0.723 1861 0.453 1860 1.454 1859 1.153 1858 2.394 1857 0.236 1856 0.334 1855 0.284 1854 0.554 1853 0.787 1852 0.895 1851 0.581 1850 0.518 1849 1.226 1848 1.288 1847 0.657 1846 0.708 1845 2.109 1844 0.502 1843 0.809 1842 0.608 1841 0.959 1840 0.629 1839 1.378 1838 1.441 1837 0.42 1836 0.558 1835 0.799 1834 0.495 1833 0.342 1832 0.478 1831 1.505 1830 1.015 1829 0.859 1828 0.929 1827 1.449 1826 0.73 1825 0.425 1824 0.181 1823 0.148 1822 0.443 1821 0.382 1820 0.345 1819 0.537 1818 0.216 1817 0.239 1816 0.148 1815 0.216 1814 0.439 1813 0.541 1812 0.197 1811 0.322 1810 0.19 1809 0.158 1808 0.966 1807 0.828 1806 0.627 1805 0.696 1804 0.627 1803 0.215 1802 1.162 1801 0.502 1800 0.242 1799 0.586 1798 1.399 1797 0.464 1796 0.61 1795 0.643 1794 1.522 1793 1.222 1792 1.073 1791 0.481 1790 0.216 1789 0.198 1788 0.232 1787 0.317 1786 0.839 1785 0.496 1784 1.01 1783 0.917 1782 0.231 1781 0.488 1780 0.282 1779 1.197 1778 0.205 1777 0.342 1776 0.932 1775 0.299 1774 0.145 1773 0.171 1772 0.222 1771 0.205 1770 0.205 1769 0.864 1768 0.333 1767 0.214 1766 0.128 1765 0.236 1764 0.519 1763 0.289 1762 0.54 1761 0.26 1760 0.116 1759 0.11 1758 0.2 1757 0.588 1756 0.526 1755 0.501 1754 1.103 1753 0.167 1752 0.2 1751 0.277 1750 0.873 1749 1.128 1748 0.412 1747 0.257 1746 0.264 1745 0.356 1744 0.47 1743 0.347 1742 0.412 1741 0.302 1740 0.466 1739 0.445 1738 0.224 1737 0.295 1736 0.116 1735 0.597 1734 0.559 1733 0.27 1732 0.128 1731 0.456 1730 0.279 1729 0.238 1728 0.624 1727 0.264 1726 0.573 1725 0.495 1724 0.417 1723 0.27 1722 0.154 1721 0.622 1720 0.179 1719 0.43 1718 0.097 1717 2.007 1716 1.266 1715 0.145 1714 0.685 1713 0.641 1712 0.385 1711 0.291 1710 0.231 1709 0.214 1708 0.419 1707 0.103 1706 0.111 1705 0.13 1704 0.205 1703 0.103 1702 0.231 1701 0.122 1700 0.141 1699 0.16 1698 0.205 1697 0.154 1696 0.41 1695 0.635 1694 0.372 1693 0.648 1692 0.257 1691 0.758 1690 0.225 1689 0.277 1688 0.218 1687 0.135 1686 0.584 1685 0.212 1684 0.353 1683 0.507 1682 0.084 1681 1.002 1680 0.346 1679 0.474 1678 1.046 1677 0.129 1676 0.239 1675 0.845 1674 0.443 1673 0.62 1672 0.247 1671 0.244 1670 0.162 1669 0.245 1668 0.971 1667 0.359 1666 0.647 1665 0.622 1664 0.205 1663 0.436 1662 0.167 1661 0.276 1660 0.122 1659 0.263 1658 0.397 1657 0.366 1656 0.508 1655 0.494 1654 0.776 1653 0.603 1652 0.449 1651 0.295 1650 0.302 1649 0.475 1648 0.212 1647 0.353 1646 0.347 1645 0.398 1644 0.437 1643 0.367 1642 0.424 1641 0.462 1640 0.437 1639 0.224 1638 0.269 1637 0.154 1636 0.308 1635 0.276 1634 0.546 1633 1.519 1632 0.29 1631 0.155 1630 0.303 1629 0.188 1628 0.688 1627 0.466 1626 0.149 1625 0.308 1624 0.345 1623 0.456 1622 0.437 1621 0.772 1620 0.232 1619 0.172 1618 0.241 1617 0.317 1616 0.729 1615 0.163 1614 0.257 1613 0.513 1612 0.171 1611 0.361 1610 0.412 1609 0.223 1608 0.488 1607 0.109 1606 0.501 1605 0.295 1604 0.173 1603 0.379 1602 0.61 1601 0.578 1600 0.257 1599 0.591 1598 0.199 1597 0.199 1596 0.641 1595 0.6185 1594 0.5495 1593 0.3825 1592 0.249 1591 0.14 1590 0.251 1589 0.125 1588 0.1305 1587 0.5455 1586 0.39 1585 1.053 1584 0.287 1583 0.445 1582 0.4085 1581 0.97 1580 1.1535 1579 0.673 1578 0.1435 1577 0.3245 1576 0.4995 1575 0.6165 1574 5.383 1573 3.187 1572 1.9375 1571 1.256 1570 0.327 1569 1.2795 1568 0.263 1567 0.3275 1566 2.293 1565 0.5235 1564 1.1325 1563 2.734 1562 0.843 1561 1.1205 1560 0.3655 1559 0.968 1558 0.277 1557 0.809 1556 1.111 1555 0.1845 1554 0.58 1553 1.063 1552 0.869 1551 0.6925 1550 0.5215 1549 1.0025 1548 0.533 1547 0.198 1546 0.119 1545 0.1505 1544 0.311 1543 0.252 1542 0.704 1541 0.953 1540 1.544 1539 0.807 1538 0.609 1537 1.0425 1536 1.679 1535 2.266 1534 0.2405 1533 0.4555 1532 1.3545 1531 0.4745 1530 0.527 1529 0.954 1528 1.108 1527 1.1585 1526 0.881 1525 0.608 1524 1.197 1523 0.7175 1522 0.6715 1521 0.384 1520 0.308 1519 2.82 1518 0.109 1517 0.139 1516 0.392 1515 0.332 1514 2.239 1513 2.119 1512 0.737 1511 1.48 1510 0.252 1509 0.212 1508 0.749 1507 0.211 1506 0.181 1505 5.519 1504 0.408 1503 1.003 1502 0.491 1501 0.525 1500 0.43 1499 0.438 1498 1.346 1497 0.361 1496 0.434 1495 2.047 1494 0.316 1493 0.561 1492 1.806 1491 0.791 1490 0.315 1489 1.492 1488 0.529 1487 0.487 1486 0.376 1485 0.285 1484 4.178 1483 0.697 1482 0.133 1481 0.122 1480 0.122 1479 0.829 1478 0.56 1477 0.578 1476 0.316 1475 1.242 1474 0.144 1473 0.468 1472 0.504 1471 0.887 1470 0.656 1469 0.659 1468 0.57 1467 0.656 1466 0.176 1465 1.149 1464 0.438 1463 0.279 1462 0.325 1461 0.234 1460 0.898 1459 0.393 1458 0.394 1457 0.884 1456 0.226 1455 0.808 1454 0.445 1453 0.151 1452 0.272 1451 0.287 1450 1.2 1449 1.999 1448 0.08 1447 1.132 1446 0.438 1445 0.896 1444 0.332 1443 0.439 1442 2.236 1441 0.428 1440 0.493 1439 0.222 1438 0.194 1437 1.031 1436 0.305 1435 1.129 1434 1.512 1433 0.864 1432 1.282 1431 0.618 1430 0.762 1429 2.016 1428 1.174 1427 0.711 1426 1.236 1425 0.464 1424 0.846 1423 0.212 1422 1.008 1421 0.425 1420 0.172 1419 0.437 1418 0.197 1417 0.076 1416 0.113 1415 1.323 1414 0.311 1413 0.379 1412 0.629 1411 0.448 1410 0.332 1409 0.192 1408 0.427 1407 0.243 1406 0.258 1405 0.303 1404 2.42 1403 0.282 1402 0.477 1401 0.526 1400 1.309 1399 0.295 1398 0.897 1397 1.338 1396 0.967 1395 0.815 1394 0.6 1393 0.161 1392 0.684 1391 0.159 1390 0.664 1389 0.454 1388 0.097 1387 0.097 1386 0.078 1385 0.223 1384 0.098 1383 0.199 1382 0.199 1381 0.112 1380 0.789 1379 0.514 1378 0.133 1377 0.142 1376 0.24 1375 0.314 1374 0.635 1373 0.282 1372 0.328 1371 0.237 1370 0.493 1369 0.387 1368 0.144 1367 0.174 1366 0.765 1365 0.247 1364 0.359 1363 0.371 1362 0.167 1361 0.433 1360 0.906 1359 0.418 1358 0.322 1357 0.136 1356 0.503 1355 0.096 1354 0.121 1353 0.226 1352 0.111 1351 0.428 1350 0.332 1349 0.332 1348 0.222 1347 0.458 1346 0.252 1345 0.412 1344 0.936 1343 0.352 1342 0.297 1341 0.161 1340 0.156 1339 0.372 1338 0.252 1337 0.443 1336 0.519 1335 0.332 1334 1.137 1333 1.077 1332 0.765 1331 0.247 1330 1.384 1329 0.423 1328 0.649 1327 0.081 1326 0.518 1325 0.468 1324 0.282 1323 0.211 1322 0.413 1321 0.111 1320 0.111 1319 1.213 1318 0.85 1317 0.483 1316 1.006 1315 0.166 1314 0.674 1313 0.196 1312 0.302 1311 0.528 1310 0.498 1309 0.438 1308 0.362 1307 0.312 1306 0.382 1305 0.367 1304 0.87 1303 0.247 1302 0.161 1301 0.403 1300 0.307 1299 0.282 1298 0.689 1297 0.352 1296 0.186 1295 0.131 1294 0.362 1293 0.709 1292 0.961 1291 0.106 1290 0.221 1289 0.443 1288 1.887 1287 0.52 1286 0.374 1285 0.715 1284 0.347 1283 0.267 1282 0.121 1281 0.292 1280 1.072 1279 0.317 1278 0.207 1277 0.79 1276 0.237 1275 0.171 1274 0.181 1273 0.403 1272 0.081 1271 0.499 1270 0.156 1269 0.448 1268 0.362 1267 0.081 1266 0.257 1265 0.121 1264 0.919 1263 0.302 1262 0.168 1261 0.37 1260 0.151 1259 0.534 1258 0.847 1257 0.701 1256 0.102 1255 0.571 1254 0.747 1253 0.278 1252 0.243 1251 0.272 1250 0.237 1249 0.684 1248 0.136 1247 0.502 1246 0.287 1245 0.574 1244 0.358 1243 0.443 1242 0.664 1241 0.272 1240 0.725 1239 0.279 1238 0.318 1237 1.328 1236 0.349 1235 0.144 1234 0.321 1233 0.123 1232 0.586 1231 0.19 1230 1.063 1229 0.738 1228 0.312 1227 0.663 1226 0.129 1225 0.13 1224 0.259 1223 0.224 1222 0.161 1221 0.441 1220 0.261 1219 0.207 1218 0.191 1217 0.372 1216 0.577 1215 1.049 1214 0.408 1213 0.597 1212 0.17 1211 0.284 1210 0.178 1209 0.319 1208 0.351 1207 0.628 1206 0.16 1205 0.535 1204 0.258 1203 0.432 1202 0.249 1201 0.643 1200 0.317 1199 0.318 1198 0.475 1197 0.211 1196 0.294 1195 0.326 1194 0.287 1193 0.151 1192 0.211 1191 0.243 1190 0.302 1189 0.257 1188 0.34 1187 0.839 1186 0.144 1185 0.257 1184 0.392 1183 0.625 1182 0.526 1181 0.345 1180 0.478 1179 1.086 1178 0.333 1177 0.755 1176 0.261 1175 0.224 1174 0.289 1173 0.377 1172 0.394 1171 0.324 1170 0.352 1169 0.919 1168 0.199 1167 0.471 1166 0.11 1165 0.461 1164 0.236 1163 0.575 1162 0.297 1161 0.459 1160 0.282 1159 0.201 1158 0.311 1157 0.29 1156 0.35 1155 0.324 1154 0.161 1153 3.381 1152 0.485 1151 1.036 1150 0.302 1149 0.675 1148 0.346 1147 0.184 1146 1.757 1145 0.318 1144 0.638 1143 0.258 1142 1.331 1141 2.747 1140 0.081 1139 0.096 1138 0.156 1137 0.166 1136 0.367 1135 0.221 1134 0.292 1133 0.654 1132 0.767 1131 0.296 1130 0.204 1129 0.4 1128 0.173 1127 0.323 1126 0.681 1125 0.286 1124 0.232 1123 0.888 1122 0.889 1121 1.017 1120 0.422 1119 0.492 1118 3.635 1117 0.357 1116 0.419 1115 0.494 1114 0.247 1113 0.223 1112 0.239 1111 0.094 1110 0.473 1109 0.818 1108 0.428 1107 1.104 1106 2.673 1105 0.155 1104 1.085 1103 0.138 1102 0.452 1101 0.618 1100 0.441 1099 0.912 1098 0.295 1097 0.896 1096 0.67 1095 0.566 1094 0.19 1093 0.29 1092 0.212 1091 0.826 1090 0.179 1089 0.173 1088 0.153 1087 0.221 1086 1.527 1085 0.96 1084 0.175 1083 0.169 1082 0.166 1081 1.715 1080 0.284 1079 0.196 1078 0.223 1077 0.286 1076 0.537 1075 0.094 1074 0.459 1073 0.111 1072 0.236 1071 0.697 1070 0.304 1069 0.328 1068 0.288 1067 0.256 1066 0.599 1065 0.246 1064 0.293 1063 1.816 1062 0.633 1061 0.397 1060 0.199 1059 0.422 1058 0.365 1057 0.37 1056 0.351 1055 0.237 1054 0.28 1053 0.127 1052 0.148 1051 0.447 1050 0.305 1049 1.263 1048 0.278 1047 0.2 1046 0.077 1045 0.113 1044 0.257 1043 0.877 1042 0.436 1041 0.431 1040 0.287 1039 0.255 1038 0.215 1037 0.592 1036 0.375 1035 0.621 1034 0.164 1033 0.305 1032 0.649 1031 0.688 1030 0.486 1029 0.419 1028 0.433 1027 0.241 1026 1.166 1025 0.298 1024 0.309 1023 0.577 1022 0.338 1021 0.149 1020 0.325 1019 0.219 1018 0.503 1017 0.277 1016 0.505 1015 0.455 1014 0.728 1013 0.516 1012 0.431 1011 0.142 1010 0.702 1009 0.472 1008 1.512 1007 0.307 1006 0.655 1005 0.189 1004 0.797 1003 0.267 1002 0.887 1001 1.243 1000 0.324 999 0.366 998 0.263 997 0.278 996 0.537 995 0.598 994 1.899 993 0.117 992 0.461 991 0.242 990 0.444 989 0.323 988 0.101 987 0.158 986 0.563 985 0.279 984 0.287 983 0.132 982 0.091 981 0.169 980 0.477 979 0.409 978 0.385 977 0.343 976 0.332 975 0.263 974 0.649 973 0.332 972 0.094 971 2.588