******************************************************************************* *** Historical CO2 Record from the Vostok Ice Core *** *** *** *** Source: J.M. Barnola *** *** D. Raynaud *** *** C. Lorius *** *** Laboratoire de Glaciologie et de Geophysique de l'Environnement *** *** 38402 Saint Martin d'Heres Cedex, France *** *** *** *** N. I. Barkov *** *** Arctic and Antarctic Research Institute *** *** Beringa Street 38 *** *** St. Petersburg 199226, Russia *** *** *** *** August 1999 *** ******************************************************************************* Mean Age of age of CO2 Depth the ice the air concentration (m) (yr BP) (yr BP) (ppmv) 149.10 5679 2342 284.7 173.10 6828 3634 272.8 177.40 7043 3833 268.1 228.60 9523 6220 262.2 250.30 10579 7327 254.6 266.00 11334 8113 259.6 302.60 13449 10123 261.6 321.20 14538 11013 263.7 331.60 15208 11326 244.8 342.10 15922 11719 238.3 365.50 17747 13405 236.2 375.60 18580 13989 225.3 443.50 24315 17695 182.2 470.80 26578 19988 189.2 506.40 29630 22977 191.6 544.70 32844 26303 188.5 554.20 33645 27062 191.7 602.30 37421 31447 205.4 625.60 39310 33884 209.1 700.20 45242 39880 209.1 765.00 50610 44766 189.3 788.20 52446 47024 188.4 800.00 53436 48229 210.1 812.20 54474 49414 215.7 834.80 56300 51174 190.4 902.20 61783 57068 221.8 912.00 62689 57799 210.4 986.20 69618 63687 195.4 1011.30 71767 65701 191.4 1023.50 72797 66883 195.0 1087.20 78042 72849 227.4 1112.50 80057 75360 229.2 1162.10 83615 78995 217.1 1175.00 84515 80059 221.8 1209.90 86840 82858 231.0 1237.20 88808 84929 241.1 1251.50 89864 85727 236.4 1261.20 90609 86323 228.1 1274.20 91560 87180 214.2 1289.20 92632 88051 217.0 1309.20 94039 89363 208.0 1338.20 96047 91691 224.3 1349.00 96791 92460 228.4 1387.20 99498 95349 232.1 1451.50 103733 99842 225.9 1463.20 104566 100833 230.9 1476.10 105492 101829 236.9 1505.00 107599 103372 228.2 1526.30 109404 105213 236.9 1542.10 110674 106203 230.7 1575.20 113363 108308 238.2 1582.80 113952 108994 245.7 1598.00 115077 110253 251.3 1615.00 116228 111456 256.8 1627.90 117072 112577 266.3 1637.60 117671 113472 261.4 1644.00 118074 114082 274.6 1651.00 118499 114738 273.3 1669.20 119601 116175 262.5 1687.20 120680 117519 267.6 1700.90 121485 118396 273.8 1716.00 122345 119273 272.0 1726.80 122965 120002 265.2 1736.80 123535 120652 277.7 1758.20 124721 121961 272.2 1770.00 125380 122606 276.5 1789.20 126447 123815 268.7 1790.00 126491 123858 266.6 1799.00 126955 124306 266.3 1804.00 127210 124571 279.8 1810.00 127510 124876 277.2 1825.70 128293 125746 273.8 1830.00 128501 126023 267.1 1836.00 128804 126475 262.5 1841.60 129097 126809 262.6 1852.40 129674 127445 275.4 1869.30 130599 128300 274.1 1870.20 130653 128399 287.1 1875.90 130998 128652 286.8 1882.50 131406 129007 282.7 1890.00 131908 129411 264.1 1895.00 132264 129755 263.4 1903.50 132873 130167 259.0 1932.00 135308 131789 240.4 1954.50 137601 133334 224.0 1969.80 139285 134205 208.9 1980.20 140452 135003 204.6 1987.40 141257 135683 198.1 1990.60 141615 135976 201.8 1994.60 142064 136359 202.5 1998.00 142440 136659 195.9 2005.80 143315 137383 194.4 2009.50 143732 137694 193.4 2015.00 144346 138226 190.2 2025.70 145527 139445 192.3 2041.50 147292 141312 196.5 2050.30 148287 142357 190.4 2077.50 151234 145435 197.0 2116.00 155625 150303 191.9 2157.00 160293 154471 189.0 2164.00 161077 155299 185.5 2203.00 165646 160494 204.4 2225.00 168391 162996 191.6 2247.00 170922 165278 183.8 2280.00 174920 169870 197.9 2302.00 177644 172596 197.8 2325.00 180546 175440 190.3 2333.00 181502 176271 190.1 2348.00 183525 178550 207.7 2363.00 185640 180779 213.2 2372.00 186927 181617 217.7 2386.00 188892 183355 199.8 2399.00 190587 185063 203.5 2414.00 192382 187199 210.7 2425.00 193816 189335 231.4 2437.00 195298 191057 231.5 2451.00 197086 192632 218.0 2475.00 199904 195625 220.1 2499.00 202496 199025 242.6 2525.00 205458 202212 251.0 2533.00 206496 203191 239.1 2543.00 207803 204283 247.7 2552.01 208947 205148 244.4 2557.71 209648 205715 232.2 2560.91 210053 206119 228.7 2574.21 211628 207991 238.2 2584.71 212846 209414 242.2 2588.81 213315 210022 244.6 2595.11 214036 210830 247.3 2596.71 214219 211005 252.0 2606.61 215343 212281 257.4 2621.71 217099 214153 251.2 2629.41 217989 215041 241.4 2634.41 218602 215593 240.3 2636.71 218908 215879 242.7 2640.41 219393 216459 247.5 2644.41 219935 217009 251.7 2646.61 220255 217271 251.2 2650.41 220822 217676 245.4 2656.21 221718 218342 240.5 2666.71 223548 219680 212.2 2670.41 224240 220182 216.2 2674.61 224993 220760 207.2 2677.41 225469 221054 208.9 2682.61 226339 221612 205.7 2691.01 227885 222958 203.4 2693.61 228349 223446 215.7 2698.01 229167 224630 236.9 2701.41 229802 225299 234.5 2702.71 230039 225509 233.1 2705.61 230547 225888 224.5 2711.71 231601 226710 232.4 2715.41 232206 227384 233.9 2717.71 232571 227840 241.7 2732.71 234795 230703 245.2 2735.71 235232 231382 252.2 2738.71 235652 231990 241.4 2741.71 236077 232570 247.4 2744.61 236467 233102 243.1 2747.61 236866 233646 239.2 2751.11 237301 234126 245.7 2753.61 237602 234470 245.9 2756.21 237889 234781 247.4 2759.11 238206 235213 252.9 2765.21 238908 236236 259.8 2773.51 240006 237831 279.0 2782.71 241535 238935 263.8 2785.51 242092 239250 252.4 2788.51 242675 239545 249.9 2794.51 243813 240201 230.4 2797.51 244446 240577 219.4 2806.51 246379 242068 214.7 2815.61 248364 243653 200.2 2818.61 249046 244215 213.9 2821.51 249670 244863 195.4 2824.51 250309 245483 196.7 2833.81 252279 247447 199.0 2836.51 252879 248087 201.9 2839.51 253559 248980 204.0 2845.51 254873 250461 203.9 2851.51 256182 251521 209.7 2857.51 257604 252959 208.9 2860.51 258351 253880 214.7 2866.51 259882 255233 228.2 2870.51 260936 256053 199.9 2872.71 261526 256501 211.7 2876.21 262455 257247 188.7 2881.42 263844 258477 194.2 2884.51 264666 259228 198.9 2887.51 265457 259958 184.7 2890.51 266255 260754 190.4 2893.51 267039 261595 193.9 2896.51 267825 262411 194.2 2899.51 268558 263207 198.4 2902.51 269307 264046 193.2 2905.51 270052 264834 202.2 2911.46 271454 266492 211.0 2914.51 272171 267434 215.4 2919.41 273256 268679 223.7 2926.51 274802 270680 231.4 2935.51 276731 273012 226.4 2941.51 278017 274445 230.4 2944.51 278711 275218 231.0 2956.51 281740 277925 220.4 2959.51 282539 278602 217.2 2964.51 283810 279543 207.7 2973.81 286475 282301 212.7 2979.51 288013 283492 213.2 2988.61 290554 286217 224.4 2994.51 292121 287846 236.2 3003.51 294495 290571 240.2 3007.01 295477 291769 240.7 3009.51 296158 292474 250.2 3015.51 297810 293676 244.9 3018.51 298623 294615 225.9 3022.71 299716 295849 227.9 3027.51 300928 297131 233.2 3030.41 301665 298051 237.9 3033.51 302452 299020 239.0 3036.51 303201 299877 241.9 3039.51 303939 300646 251.7 3042.51 304745 301496 256.8 3045.51 305612 302456 257.2 3048.56 306561 303334 246.9 3051.51 307464 303953 272.7 3054.51 308358 304590 251.7 3057.71 309281 305306 244.7 3063.51 310905 307131 255.9 3066.51 311704 308101 249.2 3072.51 313292 310039 256.3 3075.41 314032 310930 260.4 3078.51 314822 311774 260.3 3084.51 316304 313493 266.3 3090.51 317775 315143 266.2 3093.51 318509 315940 270.2 3096.46 319231 316681 271.9 3099.51 319978 317445 275.2 3105.51 321448 318980 265.0 3109.01 322216 319754 271.8 3111.51 322746 320378 272.7 3114.81 323441 321386 273.2 3117.51 324021 322111 282.4 3119.51 324461 322582 289.2 3120.61 324711 322827 288.4 3123.51 325400 323485 298.7 3126.51 326200 324189 278.2 3129.91 327237 324991 285.8 3132.41 328058 325527 278.7 3135.51 329135 326239 270.5 3138.51 330278 327114 255.7 3141.51 331513 328097 241.9 3145.01 333111 329267 239.7 3147.51 334356 330208 234.2 3153.51 337304 332293 250.2 3156.51 338770 333627 200.7 3159.51 340242 335290 205.2 3162.81 341849 336972 204.9 3169.01 344844 340165 220.4 3174.51 347589 342998 221.2 3177.81 349298 344735 216.2 3183.41 352377 347610 209.2 3189.51 355795 350765 193.0 3192.51 357450 352412 186.2 3200.01 361445 356838 201.2 3204.71 363962 359688 206.4 3210.51 367048 362766 201.9 3216.45 370095 366221 214.7 3222.51 373629 369563 229.7 3228.91 377177 373014 227.0 3231.51 378469 374561 240.0 3237.51 381834 378194 246.9 3240.51 383395 379633 245.9 3249.51 388757 384909 264.7 3252.45 390641 386579 259.3 3258.51 394634 390589 255.2 3261.51 396423 392451 250.2 3264.51 398091 394628 266.3 3267.51 399733 396713 274.7 3273.81 403173 400390 278.0 3283.51 408236 405844 279.7 3289.45 411202 409022 283.7 3292.91 413010 410831 276.3 3299.01 416332 414085 285.5