Crete Ice Core Data: Readme file -------------------------------------------------------------------------------- World Data Center A - Paleoclimatology -------------------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Crete Ice Core Data CONTRIBUTOR: Dave Fisher SUGGESTED DATA CITATION: Fisher, D., Crete Ice Core Data. International Ice Core Data Cooperative. IGBP Pages/World Data Center-A for Paleoclimatology NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: H.B. Clausen, N.S. Gundestrup, S.J. Johnsen, R. Bindschadler, and J. Zwalley, 1988, Glaciological Investigations in the Crete area, central Greenland: A search for a new deep-drilling site. Annals of Glaciology, 10: 10-15 LAST UPDATE: 1998 (Original receipt by International Ice Core Data Cooperative) GEOGRAPHIC REGION: Central Greenland LIST OF FILES: readme_crete.txt (this file), crt74-1y.txt ct84c-1y.txt ct85apit.txt ct85h-1y.txt l85a.txt ct74-12.txt ct84c.txt ct85e-1y.txt ct85h.txt l85apit.txt ct74-12b.txt ct84cp1y.txt ct85e.txt l74-12.txt l85e.txt ct74-1y.txt ct84cpit.txt ct85ep1y.txt l74sc.txt l85epit.txt ct74s-1y.txt ct84d-1y.txt ct85epit.txt l84b.txt l85f.txt ct74sc.txt ct84d.txt ct85f.txt l84bpit.txt l85g.txt ct84b-1y.txt ct84dp1y.txt ct85g-1y.txt l84c.txt l85gpit.txt ct84b.txt ct84dpit.txt ct85g.txt l84cpit.txt l85h.txt ct84bp1y.txt ct85a.txt ct85gp1y.txt l84d.txt lr74-12.txt ct84bpit.txt ct85ap1y.txt ct85gpit.txt l84dpit.txt DESCRIPTION: The Crete, Greenland ice cores consist of 8 short cores drilled in the 1984-85 field season as part of the post-GISP campaigns, and the original 400 meter Crete core drilled in 1974. Glaciological investigations were carried out in the field at eight sites. The sites are named A through H. The field work was a joint Swiss, Danish, and American venture as part of the Greenland Ice Sheet Project (GISP). The Crete data files here are delta 18-O and accumulation data for all the cores with various sample resolutions. Snowpit isotope and accumulation data are also available. File Descriptions: HIGH RESOLUTION O-18 & ACCUM FOR CENTRAL GREENLAND Prepared by Dave Fisher, Nov. 30, 1994 These file names give the site name at Crete (ct), the year the core was drilled, the specific core (a-h) or pit, and the descriptions give the type of data, the sample interval, the accumulation rate (lambda), and a short code for easy identification (in parethesis). CT84BPIT.CRT CRETE SITE B 1984 PIT DELTA-18. 8/YR . SUMMER 1984 TO 1982 . LAMBDA=.287 M/YR. %. (CRETE84/SITEBPIT) CT84B.CRT CRETE SITE B 1984 DELTA-18. 8/YEAR. STARTS 1983 .GOES TO 1716 AD %. LAMBDA=28.7 CM/YR ICE. (CRETE84/SITEB) DRILLED IN SPRING OF 1985. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 5th VALUE IS WINTER 83/84. L84BPIT .CRT CRETE SITE-B PIT.1984. ACCUMULATION . AVERAGE LAMBDA=28.7 CM/YR ICE COMES OUT IN CM OF ICE. 1984-1982 AD. (CRETE84BPIT/L) FIRST VALUE IS WINTER TO SUMMER 1984 (ROUGHLY 1/2 YEAR) L84B.CRT CRETE SITE-B 1984. ACCUMULATION. AVERAGE LAMBDA=28.7 CM/YR ICE. STARTS 1983 -1716 AD . WINTER TO WINTER (CRETE84B/L) CT84CPIT.CRT CRETE SITE-C DELTA-18. DETAILED PIT. STARTS 1984.. 8/YR . LAMBDA=28.7 CM %. (CRETE84/SITECPIT) DRILLED IN SPRING OF 1984. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 5th VALUE IS WINTER 83/84. CT84C.CRT CRETE 1984 SITE-C. DELTA-18. 8/YR. STARTS 1983-1942 AD. LAMBDA=28.7 CM ICE %. (CRETE84/SITEC) DRILLED IN SPRING OF 1984. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 6th VALUE IS WINTER 83/84. L84CPIT .CRT CRETE 1984 SITE-C PIT. ACCUMULATION. STARTS 1984-1982 AD . LAMBDA=28.7 CM/YR ICE. (CRETE84CPIT/L) FIRST VALUE IS WINTER TO SUMMER 1984 (ROUGHLY 1/2 YEAR) L84C.CRT CRETE 1984 SITE-C ACCUMULATION. STARTS 1983-1942 AD. LAMBDA=28.7 CM/YR ICE . (L84C.CRT) CT84DPIT.CRT CRETE SITE-D 1984 DELTA-18. 8/YR . STARTS 1984-1981 AD. LAMBDA=28.7 CM/YR ICE EQIV. %. (CRETE84/SITEDPIT) DRILLED IN SPRING OF 1984. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 7th VALUE IS WINTER 83/84. CT84D.CRT CRETE SITE-D 1984 DELTA-18. 8/YR. STARTS 1983-1766 AD. LAMBDA=28.7 CM/YR ICE EQUIV. %. (CRETE84/SITED) DRILLED IN SPRING OF 1984. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 6th VALUE IS WINTER 83/84. L84DPIT .CRT CRETE SITE-D PIT ACCUMULATION. STARTS 1984-1981 AD. LAMBDA=28.7 CM/Y ICE EQUIV. %. (CRETE84DPIT/L) FIRST VALUE IS WINTER TO SUMMER 1984 (ROUGHLY 1/2 YEAR) L84D.CRT CRETE SITE-D 1984 ACCUMULATION. STARTS 1983-1766 AD. LAMBDA=28.7 CM/YR ICE EQUIV. %. (CRETE84D/L) CT85APIT.CRT CRETE SITE-A 1985 DELTA-18. 8/YR . STARTS 1985 AD 19 YRS. LAMBDA=28.7 CM/YR ICE EQUIV. %. (CRETE85/SITEAPIT) DRILLED IN SPRING OF 1985. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 6th VALUE IS WINTER 84/85. CT85A.CRT CRETE SITE-A 1985 DELTA-18. 1 YR AVES. STARTS 1984-1622 AD LAMBDA=28.7 CM/YR ICE EQUIV. %. (CRETE85/SITEA) L85APIT .CRT CRETE SITE-A 1985 . ICE PIT. ACCUMULATION . STARTS 1985 . LAMBDA=28.7 BASED ON DEL DETAILED SERIES. CM/YR ICE. (CRETE85APIT/L) FIRST VALUE IS WINTER TO SUMMER 1985 (ROUGHLY 1/2 YEAR) L85A.CRT CRETE SITE-A 1985 ACCUMULATION. STARTS 1984-1622 AD. AVE LAMBDA=28.7 CM/YR ICE . (CRETE85A/L) CT85EPIT.CRT CRETE SITE-E PIT 1985 DELTA-18. STARTS 1985-1979AD. 8/YR .LAMBDA=28.7 CM/YR ICE EQUIV. %. (CRETE85/siteEpit) DRILLED IN SPRING OF 1985. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 3RD VALUE IS WINTER 84/85. CT85E.CRT CRETE SITE-E 1985 DELTA-18. 8/YR. STARTS 1983-1721 AD . LAMBDA=28.7 CM/YR ICE EQUIV. %. (CRETE85/SITEE) DRILLED IN SPRING OF 1985. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 7th VALUE IS WINTER 83/84. L85EPIT.CRT CRETE SITE-E 1985 PIT. ACCUMULATION. . STARTS 1985-1949 AD CM/YR ICE. (CRETE85EPIT/L) FIRST VALUE IS WINTER TO SUMMER 1985 (ROUGHLY 1/2 YEAR) L85E.CRT CRETE SITE-E 1985 . ACCUMULATION.. STARTS 1983-1721 AD CM/YR ICE BASED ON DETAILED DEL CURVES. (CRETE85E/L) CT85F.CRT CRETE SITE-F 1985 DELTA-18. ANNUAL AVES DELTA-18. STARTS 1983-1924 AD %. BASED ON DETAILED DEL CURVES. (CRETE85F/L) L85F.CRT CRETE SITE-F 1985 . ACCUMULATION. CM/YR ICE . LAMBDA=28.7 CM/YR ICE STARTS 1983-1924 AD . (CRETE85F/L) CT85G.CRT CRETE SITE-G 1985 DELTA-18. 8/YR . STARTS 1984-1777 AD. LAMBDA=28.7 CM/YR ICE EQUIV. %. (CRETE85/SITEG) DRILLED IN SPRING OF 1985. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 3RD VALUE IS WINTER 84/85. CT85GPIT.CRT CRETE SITE-G PIT 1985 DELTA-18. 8/YR. STARTS 1985-1974 AD.LAMBDA=28.7 CM/YR ICE. (CRETE85/SITEGPIT) L85GPIT .CRT CRETE SITE-G PIT 1985 ACCUMULATION. STARTS 1985-1974 AD. LAMBDA=28.7 CM/YR ICE . (CRETE85GPIT/L) FIRST VALUE IS WINTER TO SUMMER 1985 (ROUGHLY 1/2 YEAR) L85G.CRT CRETE SITE-G 1985 ACCUMULATION. STARTS 1984-1777 AD. LAMBDA=28.7 CM/YR ICE. (CRETE85G/L) CT85H.CRT CRETE SITE-H 1985 DELTA-18 . 8/YR . STARTS 1984-1932 AD. LAMBDA=28.7 CM/YR ICE EQUIV. %. (CRETE85/SITEH) DRILLED IN SPRING OF 1985. APPROXIMATELY 8 SAMPLES PER YEAR, BUT VARIABLE. 3RD VALUE IS WINTER 84/85. L85H.CRT CRETE SITE-H 1985 . ACCUMULATION . CM/YR ICE . STARTS 1984-1932 AD BASED ON DETAILED DEL CURVES . (CRETE85H/L) CT74SC.CRT CRETE SWISS-CORE 1974 . DELTA-18 . 16/YR . STARTS 1973-1858 AD . %. LAMBDA=28.7 CM/YR ICE . (CRETE74-SCII/16) L74SC.CRT CRETE SWISS-CORE 1974. ACCUMULATION. STARTS 1973-1858 AD BASED ON DETAILED DEL CURVES. LAMBDA=28.7 CM/YR ICE. (CRETE74-SCII/16L) CT74-12 .CRT CRETE 1974 DELTA-18. 12/ YR . STARTS 1974-553 AD . LAMBDA=28.7 CM/YR ICE THE BIG ONE EH. %. 2.391666 CM AVES . (CRETE74/12) DRILLED IN SPRING OF 1975. APPROXIMATELY 12 SAMPLES PER YEAR, BUT VARIABLE. 2ND VALUE IS WINTER 74/75. L74-12.CRT CRETE 1974 CORE DELTA-18. ACCUMULATION . STARTS 1974-553 AD. LAMBDA=28.7 CM/ ICE EQUIV. BASED ON DETAILED DEL CURVE. CM/YR ICE. (CRETE74/12ACC) FIRST VALUE IS WINTER TO SUMMER 1975 (ROUGHLY 1/2 YEAR) CT84B-1Y.CRT CRETE SITE-B 1984 DELTA-18. 1 YR AVES. STARTS 1983-1716 AD. BASED ON DETAILED DEL CURVE. LAMBDA=28.7 CM/YR ICE. (CT84B-1Y) CT84BP1Y.CRT CRETE 1984 SITE-B DELTA-18. %. 1 YR AVES. STARTS 1984-1982 AD BASED ON DETAILED PIT. LAMBDA=28.7 CM/YR ICE . (CT84P1Y) FIRST VALUE IS WINTER TO SUMMER 1984 (ROUGHLY 1/2 YEAR) CT84DP1Y.CRT CRETE 1984 SITE-D DELTA-18. 1 YR AVES. STARTS 1984-1981 AD BASED ON DETAILED DEL CURVES. LAMBDA=28.7 CM/YR ICE. (CT84DP1Y) FIRST VALUE IS WINTER TO SUMMER 1984 (ROUGHLY 1/2 YEAR) CT84D-1Y.CRT CRETE SITE-D 1984 DELTA-18. 1 YR AVES. STARTS 1983-1766 AD BASED ON DETAILED DEL CURVES . LAMBDA=28.7 CM/YR ICE . (CT84D-1Y) CT84CP1Y.CRT CRETE SITE-C 1984 PIT DELTA-18 . 1 YR AVES. STARTS 1984-1982 AD BASED ON DETAILED DELS. LAMBDA=28.7 CM/YR ICE . (CT84CP1Y) FIRST VALUE IS WINTER TO SUMMER 1984 (ROUGHLY 1/2 YEAR) CT84C-1Y.CRT CRETE SITE-C 1984 DELTA-18 . 1 YR AVES. STARTS 1983-1942 AD BASED ON DETAILED DELS. %. LAMBDA=28.7 CM/YR ICE. (CT84C-1Y) CT85AP1Y.CRT CRETE SITE-A 1985 DELTA-18 . 1 YR AVES . STARTS 1985 . 19 YRS BASED ON DETAILED DEL CURVES. LAMBDA=28.7 CM/YR ICE . (CT85AP1Y) FIRST VALUE IS WINTER TO SUMMER 1985 (ROUGHLY 1/2 YEAR) CT85EP1Y.CRT CRETE SITE-E 1985 DELTA-18 . 1 YR AVES . STARTS 1985-1979 AD BASED ON DETAILED DEL CURVES . LAMBDA=28.7 CM/YR ICE . (CT85EP1Y) FIRST VALUE IS WINTER TO SUMMER 1985 (ROUGHLY 1/2 YEAR) CT85E-1Y.CRT CRETE SITE-E 1985 DELTA-18 . 1 YR AVES . STARTS 1983-1721 AD BASED ON DETAILED DEL CURVES . LAMBDA=28.7 CM/YR ICE . (CT85E-1Y) CT85GP1Y.CRT CRETE SITE-G 1985 DELTA-18 . 1 YR AVES . STARTS 1985-1974 AD BASED ON DETAILED DEL CURVES . LAMBDA=28.7 CM/YR ICE . (CT85GP1Y) CT85G-1Y.CRT CRETE SITE-G 1985 DELTA-18 . 1 YR AVES . STARTS 1984-1777 AD BASED ON DETAILED DEL CURVES . LAMBDA=28.7 CM/YR ICE .(CT85G-1Y) FIRST VALUE IS WINTER TO SUMMER 1995 (ROUGHLY 1/2 YEAR) CT85H-1Y.CRT CRETE SITE-H 1985 DELTA-18 . 1 YR AVES . STARTS 1984-1932 BASED ON DETAILED DEL CURVES . LAMBDA=28.7 CM/YR ICE . (CT85H-1Y) FIRST VALUE IS WINTER TO SUMMER 1985 (ROUGHLY 1/2 YEAR) CT74-1Y.CRT CRETE CORE 1974 DELTA-18 . 1 YR AVES . STARTS 1974-553 AD BASED ON DETAILED DEL CURVES . LAMBDA=28.7 CM/YR ICE . (CT74-1Y) FIRST VALUE IS WINTER TO SUMMER 1975 (ROUGHLY 1/2 YEAR - ONLY 2 VALUES USED TO CREATE AVERAGE) CT74S-1Y.CRT CRETE SWISS-CORE 1974 DELTA-18 . 1 YR AVES . STARTS 1973-1858 AD BASED ON DETAILED DEL CURVES . LAMBDA=28.7 CM/YR ICE . (CT74S-1Y) CRT74-1Y.CRT CRETE CORE 1974 DELTA-18 . 1 YR AVEA . 1 YR AVES STARTS 1974 JUST LEAD 400 VALUES OF LONGER CRETE-CORE FILE. (CRT74-1Y) FIRST VALUE IS WINTER TO SUMMER 1975 (ROUGHLY 1/2 YEAR - ONLY 2 VALUES USED TO CREATE AVERAGE) LR74-12.CRT CRETE CORE 1974 ACCUMULATION. STARTS 1974 AD. LAMBDA=27.8 CM/YR JUST LEAD 400 YRS OF LONGER CRETE ACCUM FILE. CM/YR ICE. (LR74-12) FIRST VALUE IS WINTER TO SUMMER 1975 (ROUGHLY 1/2 YEAR) SUM74MC.SUM SUMMIT 1974 DELTA-18 . 16/YR DETAIL. STARTS 1972 -1903 AD LAMBDA=25 CM/YR ICE . %. (CRETE74SUMMIT-MC/16) DRILLED IN SPRING OF 1975. APPROXIMATELY 16 SAMPLES PER YEAR, BUT VARIABLE. 4TH VALUE IS WINTER 72/73. L74SUM.SUM SUMMIT 1974 ACCUMULATION . 1 YR AVES . STARTS 1972-1903 AD . CM/YR ICE LAMBDA=25 CM/YR ICE . (CRETE74SUMMIT-MC/16L) SUM74-1Y.SUM SUMMIT 1974 DELTA-18 . 1 YR AVES . STARTS 1972 -1903 AD . BASED ON DETAILED DEL CURVE. LAMBDA=25 CM/YR ICE. (SUM74-1Y) FIRST VALUE IS WINTER TO SUMMER 1985 (ROUGHLY 1/2 YEAR - 4 VARIABLES ONLY) CRETE 1985 SITE E ANNUAL ACCUMULATION REFERENCES: H.B. Clausen, N.S. Gundestrup, S.J. Johnsen, R. Bindschadler, and J. Zwalley, 1988, Glaciological Investigations in the Crete area, central Greenland: A search for a new deep-drilling site. Annals of Glaciology, 10: 10-15. DATA DESCRIPTION: # FILE: l85e.crt # Crete site E 1985 accumulation data from 1983 to 1721 AD based on detailed delta # curves. # Columns: year/ accumulation (cm/year ice equivalent). DATA: 1983 25.11 1982 25.11 1981 17.94 1980 17.94 1979 21.53 1978 21.53 1977 28.70 1976 32.29 1975 21.53 1974 21.53 1973 21.53 1972 28.70 1971 21.53 1970 21.53 1969 21.53 1968 17.94 1967 14.35 1966 14.35 1965 21.53 1964 25.11 1963 17.94 1962 21.53 1961 25.11 1960 21.53 1959 28.70 1958 21.53 1957 25.11 1956 21.53 1955 28.70 1954 25.11 1953 28.70 1952 17.94 1951 17.94 1950 25.11 1949 14.35 1948 21.53 1947 21.53 1946 32.29 1945 28.70 1944 21.53 1943 17.94 1942 25.11 1941 25.11 1940 21.53 1939 32.29 1938 25.11 1937 21.53 1936 21.53 1935 17.94 1934 32.29 1933 25.11 1932 25.11 1931 21.53 1930 21.53 1929 17.94 1928 17.94 1927 28.70 1926 14.35 1925 25.11 1924 14.35 1923 17.94 1922 25.11 1921 17.94 1920 25.11 1919 17.94 1918 21.53 1917 14.35 1916 32.29 1915 14.35 1914 25.11 1913 25.11 1912 21.53 1911 21.53 1910 25.11 1909 17.94 1908 25.11 1907 21.53 1906 21.53 1905 21.53 1904 17.94 1903 10.76 1902 21.53 1901 25.11 1900 17.94 1899 17.94 1898 28.70 1897 25.11 1896 25.11 1895 25.11 1894 17.94 1893 21.53 1892 14.35 1891 25.11 1890 21.53 1889 25.11 1888 17.94 1887 25.11 1886 17.94 1885 21.53 1884 21.53 1883 17.94 1882 14.35 1881 14.35 1880 21.53 1879 7.18 1878 10.76 1877 7.18 1876 10.76 1875 14.35 1874 17.94 1873 10.76 1872 7.18 1871 14.35 1870 10.76 1869 14.35 1868 17.94 1867 25.11 1866 17.94 1865 21.53 1864 25.11 1863 14.35 1862 32.29 1861 35.88 1860 17.94 1859 28.70 1858 17.94 1857 25.11 1856 21.53 1855 21.53 1854 17.94 1853 14.35 1852 25.11 1851 25.11 1850 21.53 1849 14.35 1848 14.35 1847 28.70 1846 25.11 1845 17.94 1844 14.35 1843 17.94 1842 10.76 1841 21.53 1840 10.76 1839 14.35 1838 25.11 1837 14.35 1836 17.94 1835 10.76 1834 28.70 1833 39.46 1832 17.94 1831 28.70 1830 10.76 1829 21.53 1828 21.53 1827 25.11 1826 21.53 1825 35.88 1824 21.53 1823 25.11 1822 10.76 1821 7.18 1820 21.53 1819 21.53 1818 21.53 1817 14.35 1816 21.53 1815 35.88 1814 28.70 1813 21.53 1812 46.64 1811 57.40 1810 32.29 1809 43.05 1808 21.53 1807 25.11 1806 21.53 1805 17.94 1804 39.46 1803 28.70 1802 10.76 1801 17.94 1800 17.94 1799 21.53 1798 14.35 1797 28.70 1796 28.70 1795 7.18 1794 28.70 1793 25.11 1792 21.53 1791 17.94 1790 25.11 1789 17.94 1788 14.35 1787 14.35 1786 21.53 1785 25.11 1784 17.94 1783 14.35 1782 17.94 1781 25.11 1780 32.29 1779 17.94 1778 10.76 1777 17.94 1776 25.11 1775 17.94 1774 25.11 1773 17.94 1772 28.70 1771 25.11 1770 17.94 1769 14.35 1768 21.53 1767 17.94 1766 25.11 1765 14.35 1764 21.53 1763 14.35 1762 25.11 1761 17.94 1760 25.11 1759 17.94 1758 28.70 1757 17.94 1756 17.94 1755 14.35 1754 17.94 1753 14.35 1752 17.94 1751 17.94 1750 25.11 1749 21.53 1748 21.53 1747 21.53 1746 32.29 1745 25.11 1744 10.76 1743 17.94 1742 25.11 1741 21.53 1740 28.70 1739 17.94 1738 25.11 1737 10.76 1736 25.11 1735 28.70 1734 25.11 1733 28.70 1732 25.11 1731 35.88 1730 25.11 1729 28.70 1728 21.53 1727 21.53 1726 17.94 1725 21.53 1724 17.94 1723 32.29 1722 14.35 1721 3.59