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 F 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: l85f.crt # Crete site F 1985 accumulation data from 1983 to 1924. # Lambda (accumulation) 28.7 cm/year ice equivalent. # Columns: year/accumulation (cm/year ice equiv.). DATA: 1983 35.88 1982 25.11 1981 21.53 1980 25.11 1979 17.94 1978 25.11 1977 21.53 1976 28.70 1975 28.70 1974 17.94 1973 25.11 1972 35.88 1971 17.94 1970 25.11 1969 25.11 1968 14.35 1967 14.35 1966 17.94 1965 21.53 1964 28.70 1963 21.53 1962 17.94 1961 25.11 1960 21.53 1959 32.29 1958 28.70 1957 21.53 1956 25.11 1955 25.11 1954 28.70 1953 25.11 1952 28.70 1951 14.35 1950 21.53 1949 14.35 1948 28.70 1947 25.11 1946 32.29 1945 25.11 1944 25.11 1943 21.53 1942 21.53 1941 28.70 1940 17.94 1939 35.88 1938 32.29 1937 21.53 1936 17.94 1935 21.53 1934 28.70 1933 28.70 1932 32.29 1931 17.94 1930 25.11 1929 17.94 1928 21.53 1927 21.53 1926 17.94 1925 28.70 1924 14.35