# West Greenland Ice Core normalized oxygen isotope stack #----------------------------------------------------------------------- # World Data Center for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program #----------------------------------------------------------------------- # NOTE: Please cite original reference when using these data, # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed # # # # Online_Resource: # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/24611 # # Original_Source_URL: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Ice Cores # -------------------- # Contribution_date # Date: 2015 # -------------------- # Title # Study_Name: West Greenland Ice Core normalized oxygen isotope stack # # -------------------- # Investigators # Investigators: Fisher, D.A.; Koerner, R.M.; Reeh, N. # -------------------- # Description_and_Notes # Description: # # -------------------- # Publication # Authors: David A. Fisher, Roy M. Koerner, Niels Reeh # Published_Date_or_Year: 1995-03 # Published_Title: Holocene climatic records from Agassiz Ice Cap, Ellesmere Island, NWT, Canada # Journal_Name: The Holocene # Volume: 5 # Edition: # Issue: 1 # Pages: 19-24 # DOI: 10.1177/095968369500500103 # Online_Resource: # Full_Citation: # Abstract: Four ice cores from the top of the Agassiz Ice Cap and down a flow line have been variously analysed for 8 (18O), ECM (solid conductivity) and ice-melt layer stratigraphy. Stratigraphic correlation of volcanic horizons is used to date the last 8000 years of the cores. The timescales at the Wisconsin/ Holocene transition are pinned at the new GRIP ice-core date. Both 8 and summer-melt records from cores A84 and A87 imply summer temperatures have decreased from 8000 BP to the present by about 2.0 degrees C. Differences in the various 8 series are explained in terms of local drift noise, excessive summer melt and ice flow originating from higher up the local dome where winter snow is scoured away. The present accumulation pattern along the flow line allows one to explain the smoothed differences in the delta records from 8000 BP to the present, but the massive summer melting between 8000 BP and the transition seems to have significantly altered the site and possibly introduced discontinuities. The massive summer melting in the early Holocene alters the volcanic acid (ECM) record in all the cores. # -------------------- # 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: # Grant: # -------------------- # Funding_Agency_Name: National Science Foundation # Grant:AGS-1304263 # Funding_Agency_Name: National Oceanic and Atmospheric Administration # Grant:NA14OAR4310176 #------------------ # Site_Information # Site_Name: West Greenland # Location: North America>Greenland # Country: Greenland # Northernmost_Latitude: 71.26 # Southernmost_Latitude: 71.26 # Easternmost_Longitude: -37.70 # Westernmost_Longitude: -37.70 # Elevation: 1800 m # -------------------- # Data_Collection # Collection_Name: 95Agas05 # Earliest_Year: 1622 # Most_Recent_Year: 1983 # Time_Unit: y_ad # Notes: {"database":"LMR"} # # -------------------- # 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,,,years AD,,,,,N ##d18O delta 18 oxygen anomaly,,,permil SMOW,,Ice Cores,,,N # # -------------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing variables: NAN # age d18O 1983 -1.868 1982 -0.243 1981 -0.083 1980 -0.573 1979 -0.734 1978 0.787 1977 1.727 1976 0.819 1975 0.221 1974 0.227 1973 -0.239 1972 -0.481 1971 -0.112 1970 -0.026 1969 0.403 1968 0.388 1967 -1.169 1966 0.107 1965 0.509 1964 1.169 1963 0.477 1962 0.568 1961 1.084 1960 0.079 1959 0.264 1958 0.527 1957 0.288 1956 -0.098 1955 0.085 1954 0.257 1953 1.336 1952 0.395 1951 -0.007 1950 -0.132 1949 -0.447 1948 0.538 1947 1.617 1946 1.851 1945 1.49 1944 -0.18 1943 -0.443 1942 0.766 1941 1.703 1940 0.131 1939 1.065 1938 0.03 1937 -1.161 1936 0.926 1935 0.579 1934 1.156 1933 1.075 1932 2.313 1931 0.956 1930 0.496 1929 1.709 1928 -0.425 1927 0.184 1926 -0.188 1925 0.035 1924 -1.343 1923 0.161 1922 -0.985 1921 -1.698 1920 -0.381 1919 -0.363 1918 -0.464 1917 0.354 1916 2.428 1915 0.22 1914 -0.584 1913 -0.705 1912 -0.054 1911 0.256 1910 -0.055 1909 0.188 1908 1.112 1907 -0.713 1906 -1.898 1905 -1.619 1904 -1.76 1903 -0.786 1902 1.265 1901 0.597 1900 -1.584 1899 -1.118 1898 -0.137 1897 -0.18 1896 0.537 1895 1.514 1894 0.956 1893 -0.052 1892 -0.186 1891 -0.089 1890 -1.528 1889 0.131 1888 0.908 1887 0.067 1886 -0.792 1885 -1.378 1884 -1.089 1883 -0.746 1882 -1.208 1881 -0.677 1880 0.566 1879 -0.033 1878 0.452 1877 -0.655 1876 0.484 1875 0.681 1874 -0.283 1873 -0.3 1872 1.154 1871 0.569 1870 0.246 1869 -0.877 1868 -0.593 1867 0.988 1866 0.487 1865 0.071 1864 -0.394 1863 -2.031 1862 -1.158 1861 -0.868 1860 -1.081 1859 -0.696 1858 -0.278 1857 -0.386 1856 0.325 1855 0.729 1854 -0.395 1853 -0.177 1852 1.258 1851 0.92 1850 0.423 1849 -0.173 1848 -0.282 1847 0.519 1846 0.289 1845 -0.182 1844 -0.815 1843 -0.15 1842 1.441 1841 1.109 1840 1.108 1839 -0.435 1838 0.191 1837 -0.411 1836 -1.681 1835 -1.617 1834 -0.313 1833 -0.574 1832 0.2 1831 0.898 1830 0.239 1829 0.063 1828 0.786 1827 -0.217 1826 -1.248 1825 -0.047 1824 -0.577 1823 -1.386 1822 0.431 1821 -0.472 1820 1.266 1819 -0.002 1818 -1.374 1817 -0.615 1816 0.075 1815 -0.098 1814 -0.262 1813 -1.114 1812 -0.064 1811 -0.215 1810 -0.542 1809 0.972 1808 0.663 1807 0.238 1806 0.056 1805 0.973 1804 0.557 1803 -1.737 1802 -1.784 1801 0.998 1800 -0.018 1799 0.183 1798 0.068 1797 0.11 1796 0.069 1795 0.415 1794 0.255 1793 -1.037 1792 0.345 1791 0.82 1790 -0.071 1789 -0.174 1788 -0.445 1787 0.63 1786 1.269 1785 0.415 1784 -0.218 1783 0.837 1782 -0.204 1781 0.39 1780 0.013 1779 -0.772 1778 -1.497 1777 -0.833 1776 0.735 1775 0.87 1774 0.342 1773 -0.687 1772 1.064 1771 1.191 1770 -1.378 1769 -0.993 1768 -0.08 1767 -0.187 1766 0.662 1765 0.97 1764 1.61 1763 1.167 1762 0.952 1761 -0.44 1760 0.395 1759 -0.562 1758 -0.581 1757 -0.594 1756 -0.468 1755 -0.245 1754 -0.078 1753 0.024 1752 -0.254 1751 0.014 1750 -0.133 1749 0.093 1748 0.356 1747 0.212 1746 0.247 1745 -0.057 1744 -0.592 1743 0.107 1742 -0.193 1741 0.105 1740 0.649 1739 0.669 1738 -0.539 1737 -1.264 1736 0.355 1735 -1.122 1734 -0.371 1733 0.89 1732 0.488 1731 0.866 1730 0.554 1729 1.896 1728 1.582 1727 1.162 1726 0.01 1725 1.113 1724 -0.532 1723 0.546 1722 -1.087 1721 -0.261 1720 -0.122 1719 -0.691 1718 0.264 1717 -0.803 1716 0.836 1715 0.22 1714 -0.152 1713 1.503 1712 0.538 1711 0.445 1710 0.311 1709 0.93 1708 0.555 1707 -0.083 1706 -0.395 1705 -0.582 1704 -0.455 1703 -0.692 1702 -0.627 1701 -0.731 1700 -0.599 1699 -0.709 1698 -0.722 1697 -0.929 1696 -1.558 1695 -0.51 1694 -0.676 1693 -0.146 1692 0.879 1691 -0.301 1690 -0.299 1689 -0.686 1688 -1.068 1687 0.431 1686 0.089 1685 -0.156 1684 0.671 1683 1.221 1682 -0.94 1681 0.192 1680 -2.124 1679 0.31 1678 0.211 1677 -0.676 1676 -1.228 1675 0.89 1674 1.274 1673 -0.204 1672 -0.612 1671 -0.586 1670 -0.54 1669 -0.254 1668 -0.258 1667 1.188 1666 0.634 1665 0.448 1664 1.133 1663 1 1662 0.219 1661 -0.644 1660 0.29 1659 -0.759 1658 -0.01 1657 0.991 1656 0.34 1655 -0.606 1654 -1.172 1653 -0.577 1652 -0.012 1651 0.752 1650 -0.076 1649 1.622 1648 0.021 1647 -0.147 1646 0.066 1645 -0.434 1644 -1.056 1643 -0.494 1642 -0.429 1641 -0.523 1640 -0.443 1639 -0.318 1638 0.302 1637 -0.189 1636 -1.465 1635 0.543 1634 -0.435 1633 0.202 1632 -0.88 1631 -0.31 1630 -0.638 1629 0.447 1628 0.653 1627 -0.377 1626 0.078 1625 -0.765 1624 -0.449 1623 -0.168 1622 0.184