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 G 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: l85g.crt # Crete site G 1985 accumulation data from 1984-1777. # Lambda (accumulation) is 28.7 cm/year ice equivalent. # Columns: year/accumulation (cm/year ice equiv.). DATA: 1984 10.76 1983 35.88 1982 28.70 1981 17.94 1980 28.70 1979 21.53 1978 25.11 1977 25.11 1976 25.11 1975 32.29 1974 25.11 1973 21.53 1972 32.29 1971 21.53 1970 28.70 1969 25.11 1968 17.94 1967 17.94 1966 17.94 1965 28.70 1964 28.70 1963 17.94 1962 21.53 1961 21.53 1960 28.70 1959 35.88 1958 21.53 1957 28.70 1956 32.29 1955 25.11 1954 25.11 1953 28.70 1952 28.70 1951 17.94 1950 25.11 1949 21.53 1948 21.53 1947 32.29 1946 28.70 1945 28.70 1944 25.11 1943 21.53 1942 28.70 1941 32.29 1940 25.11 1939 32.29 1938 32.29 1937 25.11 1936 21.53 1935 21.53 1934 32.29 1933 32.29 1932 32.29 1931 21.53 1930 25.11 1929 21.53 1928 17.94 1927 25.11 1926 21.53 1925 28.70 1924 21.53 1923 21.53 1922 28.70 1921 17.94 1920 32.29 1919 17.94 1918 21.53 1917 14.35 1916 32.29 1915 17.94 1914 28.70 1913 32.29 1912 25.11 1911 32.29 1910 25.11 1909 17.94 1908 32.29 1907 21.53 1906 25.11 1905 21.53 1904 25.11 1903 14.35 1902 21.53 1901 21.53 1900 25.11 1899 25.11 1898 25.11 1897 28.70 1896 35.88 1895 25.11 1894 17.94 1893 21.53 1892 14.35 1891 32.29 1890 25.11 1889 28.70 1888 32.29 1887 17.94 1886 14.35 1885 28.70 1884 39.46 1883 17.94 1882 25.11 1881 21.53 1880 25.11 1879 10.76 1878 28.70 1877 21.53 1876 28.70 1875 21.53 1874 25.11 1873 17.94 1872 28.70 1871 25.11 1870 25.11 1869 21.53 1868 25.11 1867 28.70 1866 17.94 1865 25.11 1864 21.53 1863 17.94 1862 28.70 1861 28.70 1860 25.11 1859 14.35 1858 25.11 1857 21.53 1856 25.11 1855 25.11 1854 25.11 1853 21.53 1852 28.70 1851 17.94 1850 21.53 1849 28.70 1848 25.11 1847 21.53 1846 25.11 1845 21.53 1844 28.70 1843 14.35 1842 25.11 1841 21.53 1840 25.11 1839 17.94 1838 28.70 1837 14.35 1836 25.11 1835 17.94 1834 25.11 1833 7.18 1832 28.70 1831 17.94 1830 14.35 1829 28.70 1828 21.53 1827 21.53 1826 17.94 1825 43.05 1824 17.94 1823 32.29 1822 10.76 1821 25.11 1820 35.88 1819 35.88 1818 17.94 1817 25.11 1816 28.70 1815 46.64 1814 25.11 1813 17.94 1812 25.11 1811 21.53 1810 17.94 1809 28.70 1808 21.53 1807 25.11 1806 17.94 1805 32.29 1804 28.70 1803 21.53 1802 17.94 1801 17.94 1800 21.53 1799 28.70 1798 14.35 1797 32.29 1796 21.53 1795 10.76 1794 32.29 1793 21.53 1792 14.35 1791 32.29 1790 21.53 1789 10.76 1788 32.29 1787 14.35 1786 35.88 1785 21.53 1784 17.94 1783 28.70 1782 21.53 1781 25.11 1780 28.70 1779 17.94 1778 21.53 1777 3.59