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 1984 SITE D 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: l84d.crt # Crete site D accumulation data from 1983 to 1766 AD. # Lambda (accumulation) is 28.7 cm/year ice equivalent. # Columns: year/accumulation (cm/year ice equiv.). DATA: 1983 21.53 1982 25.11 1981 35.88 1980 43.05 1979 21.53 1978 43.05 1977 43.05 1976 32.29 1975 32.29 1974 39.46 1973 32.29 1972 39.46 1971 35.88 1970 39.46 1969 21.53 1968 39.46 1967 32.29 1966 32.29 1965 39.46 1964 43.05 1963 43.05 1962 28.70 1961 32.29 1960 32.29 1959 35.88 1958 46.64 1957 32.29 1956 39.46 1955 46.64 1954 35.88 1953 35.88 1952 43.05 1951 28.70 1950 32.29 1949 28.70 1948 39.46 1947 35.88 1946 39.46 1945 46.64 1944 35.88 1943 32.29 1942 43.05 1941 39.46 1940 28.70 1939 53.81 1938 39.46 1937 32.29 1936 35.88 1935 28.70 1934 32.29 1933 50.23 1932 46.64 1931 39.46 1930 35.88 1929 28.70 1928 28.70 1927 35.88 1926 32.29 1925 28.70 1924 28.70 1923 28.70 1922 39.46 1921 28.70 1920 39.46 1919 32.29 1918 32.29 1917 32.29 1916 43.05 1915 35.88 1914 32.29 1913 35.88 1912 39.46 1911 43.05 1910 35.88 1909 32.29 1908 39.46 1907 28.70 1906 32.29 1905 43.05 1904 21.53 1903 25.11 1902 43.05 1901 60.99 1900 28.70 1899 28.70 1898 35.88 1897 32.29 1896 43.05 1895 43.05 1894 39.46 1893 28.70 1892 39.46 1891 35.88 1890 32.29 1889 43.05 1888 50.23 1887 43.05 1886 32.29 1885 32.29 1884 39.46 1883 32.29 1882 28.70 1881 32.29 1880 35.88 1879 57.40 1878 25.11 1877 28.70 1876 39.46 1875 35.88 1874 32.29 1873 35.88 1872 43.05 1871 39.46 1870 35.88 1869 32.29 1868 35.88 1867 50.23 1866 25.11 1865 25.11 1864 39.46 1863 32.29 1862 32.29 1861 39.46 1860 28.70 1859 35.88 1858 28.70 1857 39.46 1856 53.81 1855 35.88 1854 46.64 1853 39.46 1852 35.88 1851 39.46 1850 35.88 1849 32.29 1848 35.88 1847 39.46 1846 25.11 1845 35.88 1844 35.88 1843 32.29 1842 32.29 1841 39.46 1840 32.29 1839 28.70 1838 39.46 1837 32.29 1836 28.70 1835 28.70 1834 43.05 1833 35.88 1832 39.46 1831 50.23 1830 21.53 1829 35.88 1828 25.11 1827 46.64 1826 32.29 1825 43.05 1824 32.29 1823 28.70 1822 35.88 1821 35.88 1820 39.46 1819 35.88 1818 32.29 1817 35.88 1816 35.88 1815 35.88 1814 32.29 1813 28.70 1812 39.46 1811 28.70 1810 28.70 1809 39.46 1808 46.64 1807 46.64 1806 28.70 1805 35.88 1804 32.29 1803 43.05 1802 21.53 1801 46.64 1800 39.46 1799 39.46 1798 25.11 1797 32.29 1796 50.23 1795 25.11 1794 39.46 1793 32.29 1792 35.88 1791 39.46 1790 28.70 1789 32.29 1788 25.11 1787 35.88 1786 39.46 1785 53.81 1784 32.29 1783 39.46 1782 28.70 1781 39.46 1780 46.64 1779 17.94 1778 21.53 1777 35.88 1776 39.46 1775 32.29 1774 43.05 1773 32.29 1772 28.70 1771 39.46 1770 43.05 1769 35.88 1768 35.88 1767 32.29 1766 17.94