Vostok Ice Core CO2 Data, 1105-2856m.: Readme file ----------------------------------------------------------------------- World Data Center A- Paleoclimatology ----------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: Vostok Ice Core CO2 Data, 1105-2856m. CONTRIBUTORS: M. Wahlen, H. Fischer, J. Smith, D. Mastroianni, B. Deck, Scripps Institution of Oceanography. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2000-003 SUGGESTED DATA CITATION: Wahlen, M., et al, 2000, Vostok Ice Core CO2 Data, 1105-2856m., IGBP PAGES/World Data Center-A for Paleoclimatology Data Contribution Series # 2000-003. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Fischer, H., M. Wahlen, J. Smith, D. Mastroianni, and B. Deck, 1999, Ice core records of Atmospheric CO2 around the last three glacial terminations, Science 283, 1712-1714. ADDITIONAL REFERENCES: Wahlen, M., Allen, D. and Deck, B. (1991) Initial measurements of CO2 concentrations (1530 to 1940 AD) in air occluded in the GISP 2 ice core from central Greenland. Geophys. Res. Lett. 18(8), 1457-1460. J. Jouzel, N. I. Barkov, J. M. Barnola, M. Bender, J. Chappelaz, C. Genthon, V. M. Kotlyakov, V. Lipenkov, C. Lorius, J. R. Petit, D. Raynaud, G. Raisbeck, C. Ritz, T. Sowers, M. Stievenard, F. Yiou and P. Yiou, Extending the Vostok ice-core record of paleoclimate to the penultimate glacial period, Nature, 364, 1993, 407-412. LAST UPDATE: 01/2000 (Original Receipt by WDCA Paleo) GEOGRAPHIC REGION: Global PERIOD OF RECORD: 250-75 KYr BP LIST OF FILES: readme.vostok.CO2.txt(this file), vostok.CO2.xls(Microsoft Excel format), vostok.CO2.txt(tab-delimited text format). DESCRIPTION: CO2 data obtained from the Vostok core, 1105-2856m. The techniques employed were similar to those published in M. Wahlen et al. (1991), but continuously improved. Three samples (about 4 g each), carefully trimmed, from 1 cm depth resolution were measured on a daily basis, together with three standard gases (163 to 330 ppm). The standard gases were admitted over the crushed ice to closely reproduce the sample conditions. At least four scans by tunable diode IR laser spectrometry were performed over a single vibrational -rotational IR line at Doppler resolution in the 4.3 mm band for each sample, and standard. Portions of doubtful ice quality were remeasuared frequently. The first and second columns give the depth of the G4 and G5 cores which are offset by 3.4 m, and the third and fourths columns give air age values. The second and fourth columns were used in the publication. The air ages were derived from Jouzel et al., Nature, 364, 407 (1993); Barnola et al., Tellus, B 43 , 83 (1991); J. R. Petit et al., Nature, 387, 359 (1997): and Jean Jouzel, and J. M. Barnola (personal comm.). The fourth column is the average CO2 concentration and the following is the 1 sigma standard error of the mean. The next entry is the date of analysis. The last entry is the number of samples (usually 3 within 1 cm depth) and in regions with doubtful ice quality repeated measurements were made with plus/minus six to 10 cm depth resolution. depth ave depth+3.4 egt4air egt4air+3.4 CO2ave CO2 sigma Date Data (m) (m) (yr) (yr) (ppm) (ppm) Points 1105.051 1108.451 74653 75015 216.7 3.5 22FEB95 6 1128.068 1131.468 76357 76540 227.2 2.9 14FEB95 6 1178.093 1181.493 80351 80678 208.6 3.5 22MAR95 15 1207.087 1210.487 82580 82896 219.6 2.9 15MAY95 15 1238.070 1241.470 84989 85177 234.2 5.6 09JUN95 9 1268.068 1271.468 86769 87002 222.3 3.2 16MAR95 8 1305.140 1308.540 89117 89317 200.3 4.7 05JUN95 2 1339.388 1342.788 91763 91995 215.0 2.4 08MAR95 13 1363.476 1366.876 93635 93910 214.8 5.3 13MAR95 9 1389.064 1392.464 95455 95680 226.4 4.3 10MAR95 9 1414.046 1417.446 96972 97216 223.1 3.6 15MAR95 6 1451.355 1454.755 99828 100101 226.5 2.9 12MAY95 23 1486.055 1489.455 102358 102512 234.7 5.3 11MAY95 5 1514.066 1517.466 104163 104445 230.5 2.9 10MAY95 9 1539.027 1542.427 106087 106218 237.2 3.6 13FEB95 3 1562.079 1565.479 107214 107415 242.7 4.7 21FEB95 9 1583.085 1586.485 109016 109333 254.2 3.8 06JUN95 12 1598.108 1601.508 110260 110484 255.4 4.2 01JUN95 10 1611.194 1614.594 111182 111427 271.3 4.3 13JUN95 11 1630.062 1633.462 112771 113126 268.1 6.6 15JUN95 3 1642.066 1645.466 113912 114203 275.3 3.5 16JUN95 6 1659.027 1662.427 115426 115633 264.2 2.8 17FEB95 3 1685.050 1688.450 117373 117591 273.4 8.4 19JUN95 3 1700.355 1703.755 118361 118581 272.9 2.4 22APR96 6 1734.027 1737.427 120504 120684 259.3 8.9 28APR95 3 1751.050 1754.450 121529 121761 262.6 10.4 09MAY95 3 1767.137 1770.537 122455 122634 272.1 3.9 20JUN95 5 1787.039 1790.439 123692 123882 271.1 4.7 02MAY95 5 1810.827 1814.227 124925 125144 286.1 5.2 16FEB95 3 1827.032 1830.432 125832 126053 269.6 4.1 24APR95 3 1837.027 1840.427 126553 126752 265.3 2.4 15FEB95 3 1841.084 1844.484 126783 126990 272.7 4.2 14MAY93 14 1843.122 1846.522 126908 127104 269.4 9 1846.030 1849.430 127076 127280 293.4 8.9 15OCT93 3 1849.050 1852.450 127256 127448 281.1 5.5 14OCT93 3 1852.060 1855.460 127427 127610 278.3 5.5 24SEP93 8 1854.015 1857.415 127533 127717 266.0 5.4 05FEB96 3 1858.025 1861.425 127753 127937 290.1 7.6 06FEB96 3 1862.040 1865.440 127974 128165 286.9 6.9 18OCT93 3 1864.024 1867.424 128092 128268 271.2 3.8 08FEB96 5 1868.037 1871.437 128302 128449 280.2 5.2 09Feb96 3 1871.115 1874.515 128436 128583 272.4 2.8 12FEB96 3 1873.015 1876.415 128515 128682 291.7 3.4 13FEB96 3 1875.416 1878.816 128628 128813 270.4 6.6 08FEB95 6 1879.037 1882.437 128824 129005 266.7 2.8 10FEB95 5 1881.040 1884.440 128922 129142 263.7 3.3 14FEB96 3 1885.015 1888.415 129182 129341 269.4 1.9 15FEB96 3 1889.015 1892.415 129365 129614 273.3 6.0 16FEB96 3 1891.041 1894.441 129489 129728 273.9 5.1 24JUL95 6 1895.143 1898.543 129762 129933 262.1 4.1 27SEP93 8 1897.030 1900.430 129855 130035 257.2 3.2 01MAR96 3 1900.327 1903.727 130029 130179 243.7 5.1 31JUL95 3 1903.020 1906.420 130148 130319 255.6 3.4 07AUG95 3 1905.030 1908.430 130243 130422 248.5 4.3 12OCT93 3 1909.025 1912.425 130453 130625 263.9 1.4 14AUG95 3 1912.027 1915.427 130605 130779 257.7 2.0 06MAR95 3 1914.260 1917.660 130716 130910 253.8 2.8 29SEP93 3 1918.020 1921.420 130931 131141 249.5 2.9 06MAR96 3 1921.350 1924.750 131137 131312 246.6 4.4 04MAR96 3 1924.116 1927.516 131282 131478 255.8 4.7 30SEP93 5 1927.020 1930.420 131441 131689 230.8 1.8 07MAR96 3 1930.030 1933.430 131663 131883 213.9 5.2 03MAR95 3 1933.020 1936.420 131853 132101 258.8 4.0 08MAR96 3 1936.794 1940.194 132131 132390 242.3 7.0 28SEP93 9 1939.122 1942.522 132316 132545 240.8 7.0 13MAR96 3 1942.015 1945.415 132513 132723 233.1 3.8 14MAR96 3 1945.080 1948.480 132704 132917 245.6 0.9 05OCT93 3 1949.185 1952.585 132965 133211 225.7 2.5 15MAR96 3 1954.164 1957.564 133313 133517 222.5 6.5 28FEB95 6 1958.121 1961.521 133545 133712 213.7 3.4 11OCT93 8 1958.475 1961.875 133562 133731 204.6 1.5 18MAR96 3 1961.015 1964.415 133685 133879 207.5 1.9 22MAR96 3 1964.364 1967.764 133876 134073 209.4 2.5 21SEP93 6 1967.115 1970.515 134033 134254 205.7 4.4 29MAR96 3 1970.497 1973.897 134253 134509 195.7 2.5 02MAR95 3 1972.315 1975.715 134386 134631 194.1 2.6 19OCT93 5 1975.020 1978.420 134587 134839 189.7 2.0 01APR96 3 1978.020 1981.420 134801 135115 183.7 0.9 02APR96 3 1982.662 1986.062 135238 135570 198.8 1.6 10MAY93 7 1984.020 1987.420 135379 135685 211.4 3.8 03APR96 3 1987.290 1990.690 135673 135984 208.5 4.2 07OCT93 3 1990.369 1993.769 135955 136278 203.3 6.7 06OCT93 7 1993.137 1996.537 136212 136532 200.0 4.5 13OCT93 9 1996.309 1999.709 136511 136812 197.8 2.2 13JAN93 4 1999.190 2002.590 136761 137081 216.2 3.4 04OCT93 3 2018.040 2021.440 138597 138993 205.3 3.5 20FEB96 3 2038.020 2041.420 140907 141302 198.6 2.9 22FEB96 3 2058.015 2061.415 143274 143670 176.4 2.2 23FEB96 3 2074.015 2077.415 145077 145427 194.1 1.3 26FEB96 3 2094.027 2097.427 147441 147884 194.5 7.4 01MAR95 3 2104.027 2107.427 148769 149203 194.9 2.4 21AUG95 3 2113.027 2116.427 149940 150354 205.3 1.6 29FEB96 3 2133.022 2136.422 152079 152471 204.6 4.6 19JUL95 3 2152.027 2155.427 154004 154310 195.5 2.1 27FEB96 3 2172.027 2175.427 156426 156977 197.2 6.6 28AUG95 3 2193.080 2196.480 159458 159799 193.7 3.1 26APR96 3 2214.037 2217.437 162051 162420 196.2 1.5 23FEB95 5 2595.335 2598.735 210854 211254 260.8 5.4 13Nov98 6 2598.345 2601.745 211202 211650 243.0 2.1 06Jan98 3 2601.335 2604.735 211598 212060 246.5 3.3 13Nov98 3 2605.265 2608.665 212123 212539 252.6 0.9 16Nov98 3 2607.315 2610.715 212369 212782 244.5 1.0 17Nov98 3 2610.325 2613.725 212737 213154 242.2 3.1 17Nov98 3 2613.305 2616.705 213104 213542 241.2 2.8 06Jan98 3 2616.320 2619.720 213492 213921 232.5 1.6 18Nov98 3 2619.330 2622.730 213879 214267 233.4 1.2 18Nov98 3 2623.335 2626.735 214335 214730 237.3 5.8 05Jan98 3 2626.325 2629.725 214683 215082 240.5 0.7 10Nov98 3 2628.335 2631.735 214912 215318 242.1 2.9 10Nov98 3 2631.335 2634.735 215274 215631 239.0 1.3 05Jan98 3 2635.385 2638.785 215710 216183 233.8 2.4 21Sep98 3 2638.815 2642.215 216188 216743 235.6 5.1 21Sep98 3 2641.330 2644.730 216612 217053 229.0 3.9 10Dec97 3 2645.795 2649.195 217182 217551 254.7 3.2 03Sep98 3 2645.810 2649.210 217183 217553 249.8 3.0 24Sep98 3 2649.675 2653.075 217601 217984 239.4 1.9 01Sep98 2 2652.753 2656.153 217943 218335 258.3 1.6 26Aug98 6 2652.775 2656.175 217946 218337 246.5 2.7 24Sep98 3 2655.335 2658.735 218241 218648 240.6 4.6 02Sep98 3 2658.340 2661.740 218595 219084 231.5 5.0 10Dec97 3 2662.302 2665.702 219155 219575 219.1 1.9 08Sep98 3 2665.340 2668.740 219533 219943 223.1 1.4 23Sep98 3 2668.320 2671.720 219881 220361 216.0 3.8 05Dec97 6 2671.780 2675.180 220369 220818 222.0 4.8 23Sep98 3 2674.172 2677.572 220706 221071 213.7 4.5 18Sep98 3 2677.186 2680.586 221028 221385 214.5 2.7 12Dec97 6 2682.325 2685.725 221578 222040 208.9 2.8 31Aug98 3 2686.325 2689.725 222123 222737 212.5 2.7 10Sep98 3 2689.343 2692.743 222669 223278 219.9 3.3 12Dec97 6 2693.730 2697.130 223474 224367 245.9 2.5 31Aug98 6 2696.465 2699.865 224179 225010 246.3 1.9 04Sep98 6 2700.460 2703.860 225120 225639 235.3 4.4 15Dec97 6 2703.322 2706.722 225580 226066 217.9 1.6 08Sep98 3 2706.325 2709.725 226008 226443 218.6 3.0 10Sep98 2 2710.335 2713.735 226523 227028 224.4 1.0 15Dec97 3 2712.430 2715.830 226815 227470 242.0 2.5 17Sep98 6 2716.345 2719.745 227575 228176 221.0 0.9 25Sep98 3 2716.428 2719.828 227591 228188 211.3 0.9 30Jul98 3 2719.335 2722.735 228114 228598 234.1 1.9 18Sep98 3 2719.357 2722.757 228117 228602 233.0 4.1 28Sep98 3 2725.340 2728.740 229146 229901 223.8 1.7 16Dec97 6 2727.410 2730.810 229608 230308 236.2 2.6 21Oct98 12 2730.518 2733.918 230253 230990 231.8 4.6 15Dec98 6 2733.410 2736.810 230867 231600 236.6 2.5 28Oct98 9 2737.383 2740.783 231718 232387 232.4 1.8 17Dec97 6 2739.315 2742.715 232108 232758 230.1 2.8 28Oct98 8 2739.345 2742.745 232114 232764 256.3 2.2 17Dec98 6 2742.388 2745.788 232696 233309 242.6 3.3 18Dec98 9 2746.435 2749.835 233432 233961 239.8 1.5 09Nov98 3 2748.385 2751.785 233763 234225 242.5 1.4 17Dec97 2 2751.205 2754.605 234140 234585 254.7 4.9 04Sep98 5 2753.315 2756.715 234432 234851 260.6 3.0 03Sep98 3 2757.275 2760.675 234931 235431 264.1 1.6 18Dec97 3 2763.198 2766.598 235856 236504 268.5 4.7 31Jul98 4 2766.265 2769.665 236438 237157 291.7 3.7 15Oct98 3 2769.435 2772.835 237112 237734 288.1 4.8 18Dec97 3 2772.275 2775.675 237651 238100 296.8 6.1 19Oct98 3 2775.775 2779.175 238112 238522 282.3 6.3 03Dec98 9 2778.175 2781.575 238404 238805 275.0 2.6 03Dec98 6 2778.265 2781.665 238415 238815 264.7 4.0 11Aug98 3 2781.275 2784.675 238769 239162 262.5 3.4 19Dec97 3 2784.275 2787.675 239118 239462 255.2 3.9 19Oct98 3 2787.415 2790.815 239437 239790 248.1 4.4 11Aug98 3 2790.290 2793.690 239733 240113 244.0 0.7 15Oct98 3 2793.365 2796.765 240077 240479 231.8 2.5 19Dec97 3 2796.275 2799.675 240415 240858 223.7 3.3 14Oct98 3 2799.265 2802.665 240805 241265 227.4 5.0 16Sep98 3 2802.115 2805.515 241181 241824 222.3 3.0 14Oct98 3 2805.515 2808.915 241824 242602 218.8 2.1 30Dec97 2 2808.315 2811.715 242472 243098 220.4 4.1 12Oct98 6 2811.290 2814.690 243037 243517 215.4 3.1 16Sep98 2 2814.270 2817.670 243457 244018 209.9 5.3 12Oct98 3 2817.385 2820.785 243963 244696 203.0 2.0 30Dec97 3 2820.280 2823.680 244582 245322 200.1 3.5 05Oct98 3 2823.296 2826.696 245245 245919 206.5 4.0 15Sep98 5 2826.525 2829.925 245882 246601 206.8 3.7 01Oct98 3 2829.435 2832.835 246498 247244 205.4 3.6 31Dec97 3 2838.322 2841.722 248596 249577 218.1 6.4 30Sep98 3 2847.415 2850.815 250776 251371 226.2 6.5 30Sep98 3 2850.310 2853.710 251266 252009 221.1 4.9 31Dec97 6 2853.335 2856.735 251927 252784 225.7 2.8 01Oct98 3 2856.370 2859.770 252703 253647 235.5 2.5 14Sep98 6