Camp Century Ice Core Data: Readme file -------------------------------------------------------------------------------- World Data Center A - Paleoclimatology -------------------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Camp Century Ice Core Data CONTRIBUTORS: David Fisher SUGGESTED DATA CITATION: Fisher, D., Camp Century 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: Clausen, H.B., N.S. Gundestrup, S.J. Johnsen, R. Bindschadler, and J. Zwally. 1988. Glaciological Invetigations in the Crete Area, Central Greenland: A Search for a New Deep-Drlling Site, Annals of Glaciology 10, International Glaciological Soceitey LAST UPDATE: 1998 (Original receipt by International Ice Core Data Cooperative) GEOGRAPHIC REGION: Greenland LIST OF FILES: readme_campcentury.txt (this file), DEL1977 .CCC, CC-1YNEW.CCC. Please see also Camp Century Particulates data and readme files. DESCRIPTION: In 1966, the U.S. Army Cold Regions Research and Engineering Laboratory (CRREL) succeeded in drilling the first core to bedrock on the Greenland ice sheet at Camp Century (77 deg. 10 min.N, 61 deg. 08 min. W). By 1963, a thermal coring system, the CRREL drill, had been developed under the scientific leadership of Henri Bader as part of the U.S. International Geophysical Year (IGY) glaciology program in Greenland and Antartctica. In 1960-61, a 186 meter core was recovered. A second hole was drilled in 1962 from which 238 meters of core were obtained. A third hole was started in 1963 and 264 meters of core were recovered. In 1964, the third hole was extended to 535 meters using the thermal drill in a fluid filled hole. In 1965, an electromechanical drill extended the third hole to 1,002 meters and in July 1966, the bottom of the ice was reached at a depth of 1387.4 meters. 3.55 meters of frozen till was also recovered making the total depth of the hole 1391 meters. Camp Century delta 18-O and accumulation data files: File name: CC-1YNEW.CCC This is Camp Century delta 18-O data and are 1 year averages. The data start in 1967 AD. and are computed on a new theoretical Dansgaard/Johnsen model with a lambda = .38m/year ice equivilent with a height of 429 meters. File name: DEL1977 .CCC This file is from CC1977.CCC and has a variable =delta DAF form. The data start in 1975 and end in 1761 AD. and are annual averages from May to April. CAMP CENTURY 1977 ANNUAL LAYER THICKNESS AND DELTA 18-O REFERENCES: Dansgaard, W., S. J. Johnsen, J. Moller, and C.C. Langway, Jr. 1969. One thousand centuries of climatic record from Camp Century on the Greenland ice sheet. Science, 166:377-381. Hansen, L.B., and C.C. Langway, Jr. 1966. Deep core drilling in ice and core analysis at Camp Century, Greenland, 1961-1966. CRREL Spec. Report 126, no. 5, p.207-208. Johnsen, S.J., W. Dansgaard, H.B. Clausen, and C.C. Langway, Jr. 1970. Climatic oscillations 1200-2000 A.D. Nature 227:482-483. Johnsen, S.J., W. Dansgaard, H.B. Clausen, and C.C. Langway, Jr. 1972. Oxygen isotope profiles through the Antarctic and Greenland ice sheets. Nature 235:429-434. DATA DESCRIPTION: CAMP CENTURY 1977 CC-1 aar=year lambda=annual layer thickness dybde=depth AAR , DYBDE , CM , ANTAL,LAMBDA ,DELTA, KRADS , PROEVE , OPTALT, A.D. (BUND) (KRADS) (KRADS) (M) O18 (SYRE) NUMMER (L-FIL) DATA: 1975 2.245 -1 -1 .263 -29.73 -1.00 3 9 4 1974 3.173 -1 -1 .928 -29.55 -1.00 4 11 18 1973 3.921 -1 -1 .748 -32.05 -1.00 5 10 15 1972 4.791 -1 -1 .870 -31.37 -1.00 6 12 18 1971 5.447 -1 -1 .656 -28.33 -1.00 7 10 14 1970 6.221 -1 -1 .774 -29.92 -1.00 8 11 17 1969 7.105 -1 -1 .884 -30.79 -1.00 9 15 20 1968 8.040 -1 -1 .935 -28.34 -1.00 11 5 22 1967 8.701 -1 -1 .661 -31.63 -1.00 12 5 16 1966 9.148 -1 -1 .447 -29.45 -1.00 12 16 11 1965 9.791 -1 -1 .643 -28.87 -1.00 13 16 16 1964 10.469 0 1 .678 -31.40 .00 15 1 17 1963 11.259 0 -1 .790 -31.47 -1.00 16 5 20 1962 11.847 0 -1 .588 -31.27 -1.00 17 4 15 1961 12.546 0 -1 .699 -30.20 -1.00 18 6 18 1960 12.972 0 -1 .426 -29.03 -1.00 19 1 11 1959 13.240 0 -1 .268 -30.63 -1.00 19 8 7 1958 13.776 0 -1 .536 -30.21 -1.00 20 6 14 1957 14.460 0 -1 .684 -28.12 -1.00 21 8 18 1956 14.801 0 -1 .341 -31.23 -1.00 22 1 9 1955 15.402 0 -1 .601 -31.15 -1.00 23 1 16 1954 15.961 0 -1 .559 -30.98 -1.00 23 16 15 1953 16.517 0 -1 .556 -29.39 -1.00 24 15 15 1952 17.070 0 -1 .553 -27.74 -1.00 25 14 15 1951 17.363 0 -1 .293 -30.27 -1.00 26 6 8 1950 18.055 0 -1 .692 -29.23 -1.00 27 9 19 1949 18.526 0 -1 .471 -30.63 -1.00 28 6 13 1948 19.065 0 -1 .539 -29.18 -1.00 29 5 15 1947 19.602 0 -1 .537 -29.56 -1.00 30 4 15 1946 20.242 0 -1 .640 -28.18 -1.00 31 6 18 1945 20.771 0 -1 .529 -28.93 -1.00 32 5 15 1944 21.193 0 -1 .422 -30.87 -1.00 33 1 12 1943 21.542 0 -1 .349 -29.46 -1.00 33 11 10 1942 21.960 0 -1 .418 -29.94 -1.00 34 7 12 1941 22.756 0 -1 .796 -29.81 -1.00 35 14 23 1940 23.374 0 -1 .618 -29.50 -1.00 36 16 18 1939 23.919 0 -1 .545 -27.51 -1.00 37 16 16 1938 24.360 0 -1 .441 -31.09 -1.00 38 13 13 1937 24.833 0 -1 .473 -30.75 -1.00 39 11 14 1936 25.269 0 -1 .436 -29.36 -1.00 40 8 13 1935 25.771 0 -1 .502 -27.64 -1.00 41 7 15 1934 26.336 0 -1 .565 -28.60 -1.00 42 8 17 1933 27.128 0 -1 .792 -28.16 -1.00 43 16 24 1932 27.816 0 -1 .688 -28.90 -1.00 45 5 21 1931 28.434 0 -1 .618 -28.55 -1.00 46 8 19 1930 28.791 0 -1 .357 -29.01 -1.00 47 3 11 1929 29.274 0 -1 .483 -27.67 -1.00 48 2 15 1928 30.011 0 -1 .737 -26.62 -1.00 49 9 23 1927 30.552 0 -1 .541 -29.17 -1.00 50 10 17 1926 31.028 0 -1 .476 -28.43 -1.00 51 9 15 1925 31.375 0 -1 .347 -30.68 -1.00 52 4 11 1924 31.878 0 -1 .503 -29.89 -1.00 53 4 16 1923 32.472 0 -1 .594 -29.99 -1.00 54 7 19 1922 32.814 0 -1 .342 -31.22 -1.00 55 2 11 1921 33.125 0 -1 .311 -29.42 -1.00 55 12 10 1920 33.465 0 -1 .340 -30.57 -1.00 56 7 11 1919 34.050 0 -1 .585 -29.95 -1.00 57 10 19 1918 34.479 0 -1 .429 -31.60 -1.00 58 8 14 1917 35.120 0 -1 .641 -29.63 -1.00 59 13 21 1916 35.818 0 -1 .698 -28.05 -1.00 61 4 23 1915 36.391 0 -1 .573 -28.90 -1.00 62 7 19 1914 36.691 0 -1 .300 -31.37 -1.00 63 1 10 1913 37.081 0 -1 .390 -29.65 -1.00 63 14 13 1912 37.677 0 -1 .596 -27.66 -1.00 65 2 20 1911 38.004 0 -1 .327 -31.57 -1.00 65 13 11 1910 38.300 0 -1 .296 -30.54 -1.00 66 7 10 1909 38.831 0 -1 .531 -27.98 -1.00 67 9 18 1908 39.331 0 -1 .500 -26.54 -1.00 68 10 17 1907 39.800 0 -1 .469 -28.94 -1.00 69 10 16 1906 40.266 0 -1 .466 -26.95 -1.00 70 10 16 1905 40.615 0 -1 .349 -29.29 -1.00 71 6 12 1904 41.223 0 -1 .608 -28.51 -1.00 72 11 21 1903 41.627 0 -1 .404 -30.50 -1.00 73 9 14 1902 42.029 0 -1 .402 -30.42 -1.00 74 7 14 1901 42.745 0 -1 .716 -28.02 -1.00 75 16 25 1900 43.173 0 -1 .428 -29.30 -1.00 76 15 15 1899 43.825 0 -1 .652 -31.00 -1.00 78 6 23 1898 44.419 0 -1 .594 -29.52 -1.00 79 11 21 1897 44.869 0 -1 .450 -30.37 -1.00 80 11 16 1896 45.458 0 -1 .589 -29.51 -1.00 81 16 21 1895 45.877 0 -1 .419 -28.45 -1.00 82 15 15 1894 46.155 0 -1 .278 -27.47 -1.00 83 9 10 1893 46.683 0 -1 .528 -27.66 -1.00 84 12 19 1892 47.154 0 -1 .471 -28.48 -1.00 85 13 17 1891 47.568 0 -1 .414 -28.31 -1.00 86 12 15 1890 47.981 0 -1 .413 -28.49 -1.00 87 11 15 1889 48.530 0 -1 .549 -29.65 -1.00 88 15 20 1888 48.913 0 -1 .383 -31.17 -1.00 89 13 14 1887 49.404 0 -1 .491 -30.71 -1.00 90 15 18 1886 49.784 0 -1 .380 -31.26 -1.00 91 13 14 1885 50.002 0 -1 .218 -31.36 -1.00 92 5 8 1884 50.624 0 -1 .622 -28.73 -1.00 93 12 23 1883 50.948 0 -1 .324 -30.94 -1.00 94 8 12 1882 51.460 0 -1 .512 -28.06 -1.00 95 11 19 1881 51.970 0 -1 .510 -26.85 -1.00 96 14 19 1880 52.264 0 -1 .294 -28.94 -1.00 97 9 11 1879 52.638 0 -1 .374 -27.81 -1.00 98 7 14 1878 53.437 0 -1 .799 -28.64 -1.00 100 5 30 1877 53.994 0 -1 .557 -27.82 -1.00 101 10 21 1876 54.523 0 -1 .529 -28.60 -1.00 102 14 20 1875 55.050 0 -1 .527 -29.74 -1.00 104 2 20 1874 55.418 0 -1 .368 -29.16 -1.00 104 16 14 1873 55.707 0 -1 .289 -31.79 -1.00 105 11 11 1872 56.178 0 -1 .471 -28.43 -1.00 106 13 18 1871 56.649 0 -1 .471 -27.24 -1.00 107 15 18 1870 57.144 0 -1 .495 -29.29 -1.00 109 2 19 1869 57.560 0 -1 .416 -30.95 -1.00 110 2 16 1868 57.871 0 -1 .311 -30.40 -1.00 110 14 12 1867 58.337 0 -1 .466 -27.68 -1.00 111 16 18 1866 58.802 0 -1 .465 -30.93 -1.00 113 2 18 1865 59.292 0 -1 .490 -29.43 -1.00 114 5 19 1864 59.729 0 -1 .437 -28.37 -1.00 115 6 17 1863 60.063 0 -1 .334 -28.78 -1.00 116 3 13 1862 60.319 0 -1 .256 -32.37 -1.00 116 13 10 1861 60.857 0 -1 .538 -30.46 -1.00 118 2 21 1860 61.265 0 -1 .408 -30.25 -1.00 119 2 16 1859 61.775 0 -1 .510 -28.83 -1.00 120 6 20 1858 62.156 0 -1 .381 -28.72 -1.00 121 5 15 1857 62.790 0 -1 .634 -28.70 -1.00 122 14 25 1856 63.271 0 -1 .481 -29.87 -1.00 124 1 19 1855 63.625 0 -1 .354 -31.93 -1.00 124 15 14 1854 64.104 0 -1 .479 -30.35 -1.00 126 2 19 1853 64.481 0 -1 .377 -27.90 -1.00 127 1 15 1852 65.059 0 -1 .578 -28.36 -1.00 128 8 23 1851 65.535 0 -1 .476 -30.07 -1.00 129 11 19 1850 65.985 0 -1 .450 -29.62 -1.00 130 13 18 1849 66.484 0 -1 .499 -29.37 -1.00 132 1 20 1848 66.883 0 -1 .399 -30.17 -1.00 133 1 16 1847 67.232 0 -1 .349 -29.48 -1.00 133 15 14 1846 67.629 0 -1 .397 -29.23 -1.00 134 15 16 1845 68.101 0 -1 .472 -29.48 -1.00 136 2 19 1844 68.398 0 -1 .297 -29.63 -1.00 136 14 12 1843 68.769 0 -1 .371 -29.91 -1.00 137 13 15 1842 69.189 0 -1 .420 -30.55 -1.00 138 14 17 1841 69.535 0 -1 .346 -31.21 -1.00 139 12 14 1840 69.953 0 -1 .418 -29.42 -1.00 140 13 17 1839 70.396 0 -1 .443 -29.91 -1.00 141 15 18 1838 70.667 0 -1 .271 -32.17 -1.00 142 10 11 1837 71.182 0 -1 .515 -31.32 -1.00 143 15 21 1836 71.402 0 -1 .220 -33.72 -1.00 144 8 9 1835 71.721 0 -1 .319 -31.50 -1.00 145 5 13 1834 72.112 0 -1 .391 -31.88 -1.00 146 5 16 1833 72.503 0 -1 .391 -30.67 -1.00 147 5 16 1832 72.844 0 -1 .341 -29.88 -1.00 148 3 14 1831 73.112 0 -1 .268 -29.96 -1.00 148 14 11 1830 73.526 0 -1 .414 -29.39 -1.00 149 15 17 1829 74.110 0 -1 .584 -28.56 -1.00 151 7 24 1828 74.401 0 -1 .291 -28.42 -1.00 152 3 12 1827 74.862 0 -1 .461 -28.92 -1.00 153 6 19 1826 75.055 0 -1 .193 -32.37 -1.00 153 14 8 1825 75.515 0 -1 .460 -28.96 -1.00 155 1 19 1824 76.071 0 -1 .556 -27.75 -1.00 156 8 23 1823 76.288 0 -1 .217 -28.38 -1.00 157 1 9 1822 76.650 0 -1 .362 -29.18 -1.00 157 16 15 1821 76.963 0 -1 .313 -31.89 -1.00 158 13 13 1820 77.444 0 -1 .481 -28.30 -1.00 160 1 20 1819 77.781 0 -1 .337 -29.74 -1.00 160 15 14 1818 78.045 0 -1 .264 -30.79 -1.00 161 10 11 1817 78.285 0 -1 .240 -30.43 -1.00 162 4 10 1816 78.668 0 -1 .383 -28.07 -1.00 163 4 16 1815 79.004 0 -1 .336 -28.50 -1.00 164 2 14 1814 79.386 0 -1 .382 -28.25 -1.00 165 2 16 1813 79.793 0 -1 .407 -30.76 -1.00 166 3 17 1812 80.270 0 -1 .477 -30.68 -1.00 167 7 20 1811 80.557 0 -1 .287 -29.47 -1.00 168 3 12 1810 80.890 0 -1 .333 -29.21 -1.00 169 1 14 1809 81.105 0 -1 .215 -32.28 -1.00 169 10 9 1808 81.604 0 -1 .499 -28.46 -1.00 170 15 21 1807 82.103 0 -1 .499 -29.53 -1.00 172 4 21 1806 82.578 0 -1 .475 -28.64 -1.00 173 8 20 1805 83.100 0 -1 .522 -29.00 -1.00 174 14 22 1804 83.621 0 -1 .521 -28.07 -1.00 176 4 22 1803 84.046 0 -1 .425 -29.85 -1.00 177 6 18 1802 84.495 0 -1 .449 -29.17 -1.00 178 9 19 1801 84.779 0 -1 .284 -31.57 -1.00 179 5 12 1800 85.085 0 -1 .306 -31.43 -1.00 180 2 13 1799 85.486 0 -1 .401 -30.27 -1.00 181 3 17 1798 85.910 0 -1 .424 -29.04 -1.00 182 5 18 1797 86.357 0 -1 .447 -28.25 -1.00 183 8 19 1796 86.592 0 -1 .235 -30.63 -1.00 184 2 10 1795 86.851 0 -1 .259 -31.15 -1.00 184 13 11 1794 87.344 0 -1 .493 -30.06 -1.00 186 2 21 1793 87.696 0 -1 .352 -30.60 -1.00 187 1 15 1792 88.071 0 -1 .375 -29.57 -1.00 188 1 16 1791 88.469 0 -1 .398 -29.92 -1.00 189 2 17 1790 88.890 0 -1 .421 -29.32 -1.00 190 4 18 1789 89.288 0 -1 .398 -28.70 -1.00 191 5 17 1788 89.731 0 -1 .443 -27.59 -1.00 192 8 19 1787 90.058 0 -1 .327 -28.80 -1.00 193 6 14 1786 90.362 0 -1 .304 -31.29 -1.00 194 3 13 1785 90.921 0 -1 .559 -29.66 -1.00 195 11 24 1784 91.340 0 -1 .419 -31.28 -1.00 196 13 18 1783 91.619 0 -1 .279 -29.96 -1.00 197 9 12 1782 91.968 0 -1 .349 -28.31 -1.00 198 8 15 1781 92.317 0 -1 .349 -29.12 -1.00 199 7 15 1780 92.689 0 -1 .372 -29.59 -1.00 200 7 16 1779 93.060 0 -1 .371 -29.78 -1.00 201 7 16 1778 93.524 0 -1 .464 -28.42 -1.00 202 11 20 1777 93.918 0 -1 .394 -29.58 -1.00 203 12 17 1776 94.288 0 -1 .370 -29.17 -1.00 204 12 16 1775 94.520 0 -1 .232 -29.89 -1.00 205 6 10 1774 94.844 0 -1 .324 -29.70 -1.00 206 4 14 1773 95.491 0 -1 .647 -28.15 -1.00 207 16 28 1772 95.768 0 -1 .277 -31.17 -1.00 208 12 12 1771 96.183 0 -1 .415 -31.08 -1.00 209 14 18 1770 96.622 0 -1 .439 -30.67 -1.00 211 1 19 1769 97.152 0 -1 .530 -29.81 -1.00 212 8 23 1768 97.405 0 -1 .253 -31.33 -1.00 213 3 11 1767 97.957 0 -1 .552 -30.54 -1.00 214 11 24 1766 98.302 0 -1 .345 -31.13 -1.00 215 10 15 1765 98.693 0 -1 .391 -29.73 -1.00 216 11 17 1764 99.221 0 -1 .528 -28.67 -1.00 218 2 23 1763 99.588 0 -1 .367 -30.14 -1.00 219 2 16 1762 99.887 0 -1 .299 -29.36 -1.00 219 15 13 1761 100.070 0 -1 .183 -28.11 -1.00 220 7 8 -999 0 0 0 0 0 0 0 0 0