Guliya Ice Core 132 KYr Isotope, Dust, Anion, and Accumulation Data ----------------------------------------------------------------------- World Data Center for Paleoclimatology, Boulder and NOAA Paleoclimatology Program ----------------------------------------------------------------------- NOTE: Please cite original reference when using these data, plus the data file URL and date accessed. NAME OF DATA SET: Guliya Ice Core 128 KYr Isotope, Dust, Anion, and Accumulation Data LAST UPDATE: 1/2012 (Original receipt by WDC Paleo) CONTRIBUTORS: Thompson, L.G., T. Yao, M.E. Davis, K.A. Henderson, E. Mosley-Thompson, P.-N. Lin, J. Beer, H.-A. Synal, J. Cole-Dai, and J.F. Bolzan. IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2012-011 WDC PALEO CONTRIBUTION SERIES CITATION: Thompson, L.G., et al. 2012. Guliya Ice Core 128 KYr Isotope, Dust, Anion, and Accumulation Data. IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series # 2012-011. NOAA/NCDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCE: Thompson, L.G., T. Yao, M.E. Davis, K.A. Henderson, E. Mosley-Thompson, P.-N. Lin, J. Beer, H.-A. Synal, J. Cole-Dai, and J.F. Bolzan. 1997. Tropical climate instability: The Last Glacial Cycle from a Qinghai-Tibetan ice core. Science, Vol. 276, pp. 1821-1825, 20 June 1997. DOI: 10.1126/science.276.5320.1821 ABSTRACT: An ice core record from the Guliya ice cap on the Qinghai-Tibetan Plateau provides evidence of regional climatic conditions over the last glacial cycle. 36Cl data suggest that the deepest 20 meters of the core may be more than 500,000 years old. The d18O change across Termination I is ~5.4 per mille, similar to that in the Huascaran (Peru) and polar ice cores. Three Guliya interstadials (Stages 3, 5a, and 5c) are marked by increases in d18O values similar to that of the Holocene and Eemian (~124,000 years ago). The similarity of this pattern to that of CH4 records from polar ice cores indicates that global CH4 levels and the tropical hydrological cycle are linked. The Late Glacial Stage record contains numerous 200-year oscillations in d18O values and in dust, NH4+, and NO3- levels. ADDITIONAL REFERENCE: Thompson, L.G., E. Mosley-Thompson, H. Brecher, M. Davis, B. Leon, D. Les, P.-N. Lin, T. Mashiotta and K. Mountain. 2006. Abrupt tropical climate change: Past and present. Proceedings of the National Academy of Sciences, Vol. 103, No. 28, pp. 10536-10543, 11 July, 2006. DOI: 10.1073/pnas.0603900103 Note: the decadal and 400-year averages of dust and major anions (chloride, nitrate, sulfate) have not been published, but are included here. GEOGRAPHIC REGION: Tibetan Plateau PERIOD OF RECORD: 132 KYrBP - present FUNDING SOURCES: U.S. National Science Foundation, Division of Atmospheric and Geospace Sciences, grant ATM-8916635. DATA FILE URLS: ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/trop/guliya/guliya1997.txt ftp://ftp.ncdc.noaa.gov/pub/data/paleo/icecore/trop/guliya/guliya1997.xls DESCRIPTION: Guliya ice core oxygen isotopes, dust, ice accumulation, and major anions (chloride, nitrate, sulfate) data plus decadal and 400-year averages from 132 to 0 ky B.P. Note: the decadal and 400-year averages of dust and major anions (chloride, nitrate, sulfate) have not been published, but are included here. Guliya Ice Core, Western Kunlun Mountains, Northwestern Tibetan Plateau: 35°17'N, 81°29'E, 6200 masl DATA: 1. Guliya ice core data by depth Column 1: Top depth (m) Column 2: d18O per mille Column 3: Dust concentration (0.63 to 20 um in diameter), particles/mL Column 4: Chloride ppb Column 5: Sulfate ppb Column 6: Nitrate ppb Top depth d18O Dust Chloride Sulfate Nitrate 0 -13.21 960282 366.6 431.2 281.2 10 -14.83 779488 474.2 486.4 306.1 20 -14.93 1036093 442.7 428.9 268.3 30 -14.75 1248283 419.4 354.5 248.4 40 -13.65 856916 526.1 505.6 294.1 50 -14.24 1358445 508.9 547.7 316.4 60 -13.63 795673 576.2 682.6 357.6 70 -15.12 1391072 426.1 554.3 312.1 80 -13.64 1024428 415.5 535.7 327.6 90 -15.41 951540 619.2 806.2 391.5 100 -15.77 719394 498.7 689.4 311.6 105 -15.07 774392 619.5 896 348.5 110 -15.95 733678 579.5 593.2 272.2 115 -16.31 606435 674.3 830.5 412 120 -16.53 872394 498 515.2 279.8 125 -17.31 718725 568.2 558.9 310.4 130 -15.27 703048 626.3 807 377.2 135 -12.8 878628 578.3 753.6 336.7 140 -13.11 987157 490.9 550.7 274.3 145 -13.92 559641 635.1 665.7 296.7 150 -14.2 600992 474.6 673.8 316.4 153 -16.61 848587 379.7 582.8 297.4 156 -18.37 841123 538.9 672.7 291.1 159 -18.27 878337 542 494.9 292.8 162 -17.8 741816 639 558.2 247.9 165 -18.55 502013 570.4 520.8 271.3 168 -19.33 423464 678 638.6 315.5 171 -19.74 1193354 860.6 643.5 253.9 174 -18.79 1072076 592.8 723.3 321 177 -13.91 1194615 807.9 965.6 320 180 -12.22 1206213 808.4 1163.6 328.9 183 -15.65 813689 665.1 968.7 359.5 186 -14 562430 708.9 806.4 334.8 189 -15.59 683635 492.6 631.6 265.6 192 -18.1 850757 501.3 640 264.1 195 -16.49 1012443 627.2 728.2 303.1 198 -17.48 1072765 628.5 712.3 290.1 201 -15.82 777069 634.8 864.6 313.7 204 -14.92 745181 585.6 771.5 313.5 207 -13.68 834182 530.7 667.8 268.6 210 -16.4 1021219 509.6 534 271.2 213 -18.43 1256652 579.1 590.1 309.6 216 -18.86 1217519 598.5 591.4 283.6 219 -19.26 1972568 638.2 581.3 285 222 -14.99 1265940 759.1 917.8 335.6 225 -14.99 828378 455.1 564.7 300.9 228 -16.4 1042712 506 601.1 282 231 -16.67 949610 528.1 607.1 286.1 234 -16.07 1040002 560.9 688.8 280.6 237 -16.85 1105133 669.9 800.3 331.6 240 -17.21 975877 571.1 701.9 297.3 243 -17.38 813730 666.6 649.9 254.8 246 -16.36 1013024 573.4 584 235.3 249 -14.63 659730 596 715.2 299.3 252 -13.87 1356732 427.9 651.7 258.3 253 -14.17 780553 531.7 790.1 266.5 254 -13.78 663278 493.1 674.6 285.3 255 -14.03 961837 484.7 615.8 268.9 256 -14.14 696151 427.8 676.6 307.3 257 -15 674290 421.5 574.1 290.6 258 -15.07 679230 445.1 662.2 281.3 259 -15.23 517670 458.8 631.9 278.5 260 -14.47 550480 397.3 539.3 291.3 261 -15.99 606475 394.4 512.7 300.4 262 -16.67 722575 436.5 495.6 242.4 263 -17.55 677446 457.3 619.8 288.9 264 -17.49 695985 440 525.8 288.2 265 -17.27 746235 460.4 607.7 283.6 266 -11.81 619336 506.2 784 283 267 -12.7 780019 550.8 900.1 301.4 268 -12.99 612320 591.9 845.2 308.5 269 -13.4 629914 665.2 887.2 306.3 270 -13.8 522883 529.5 868.8 288.8 271 -13.49 568315 528.8 772.3 305 272 -12.85 498542 579.5 836 334.3 273 -12.88 555215 645.5 984.1 344.8 274 -13.39 486790 463.7 648.5 275.4 275 -12.87 510845 566.5 875.3 458 276 -13.33 538670 605.2 976.6 365 277 -12.86 505748 509.9 774.3 326.4 278 -12.75 439632 583.5 799 322 279 -12.55 529342 717.2 1111.4 381.9 280 -12.48 458990 697 990.8 373.6 281 -12.66 571305 722.5 1044.5 338.5 282 -12.72 755374 625 903.5 327.9 283 -12.66 467920 698.5 970.4 346 284 -12.96 427470 677.9 879.1 331.7 285 -12.81 486336 676.8 761.7 301.7 286 -12.93 460661 672.2 954.3 332.2 287 -13.27 491060 690.2 975.6 330.8 288 -13.11 498782 805.6 960.5 342.7 289 -13.21 439315 637.1 778.8 292 290 -13.3 436294 684.3 1013.3 326.5 291 -13.9 328085 585.5 709.1 289 292 -14.08 573152 566.4 817.6 214.4 293 -13.52 460759 345 345.1 65.6 294 -13.94 3841811 198.8 124.3 28.5 295 -14.04 24828725 262 233.1 39.7 296 -13.71 518875 418.7 347.9 76.7 297 -13.42 14899796 469.5 521.7 158.3 298 -13.87 30993340 363.7 571.8 61.4 299 -13.77 2728503 563.9 696.5 285.1 300 -14.04 60749825 374.2 348.4 70.1 301 -14.07 2592397 349.5 215.8 58.3 302 -13.63 15847092 550.6 742.3 259.8 303 -13.54 102943609 255.7 108.9 25.2 304 -13.58 4211677 196.4 100.4 15.5 305 -13.09 131642090 117.1 97.5 10.8 306 -13.81 72196984 71 111.4 18.9 307 -14.21 90662549 63.9 219.7 20.4 308 -14.29 69099332535 36.8 333.9 7 308.6 bottom of core 2. Guliya ice core data decadal averages (from 0 to 1989 AD) of oxygen isotopes, dust, major anions and net balance (accumulation) Column 1: Year AD (Beginning of Interval) Column 2: Year AD (End of Interval) Column 3: d18O (per mille) Column 4: Dust concentration (0.63 to 20 um in diameter, particles/mL) Column 5: Chloride (ppb) Column 6: Sulfate (ppb) Column 7: Nitrate (ppb) Column 8: Reconstructed net balance (cm ice/yr) YearBegin YearEnd d18O Dust Chloride Sulfate Nitrate NetBalance 1980 1989 -12.35 881244 247.4 232.5 199 28.35 1970 1979 -13.75 1185218 320.7 362.6 270.3 32.16 1960 1969 -12.63 1322846 238 273.9 220.1 31.41 1950 1959 -13.74 854095 347.1 363.4 258 36.81 1940 1949 -12.78 1157228 526.1 684.5 374.3 24.57 1930 1939 -13.46 1122123 300.1 378 206.1 31.44 1920 1929 -13.29 551862 465.1 586.2 343.4 31.72 1910 1919 -14.22 920141 461.7 513.1 316 24.82 1900 1909 -14.18 742585 403.1 395 223.9 30.92 1890 1899 -14.1 533837 517 447.1 351.3 36.11 1880 1889 -12.28 1277123 353.9 315.1 202.2 25.66 1870 1879 -15.86 418031 628.3 632.8 382.2 21.43 1860 1869 -14.77 293458 557.5 712.9 448.3 23.54 1850 1859 -15.29 377061 477.5 547.1 349.1 21.28 1840 1849 -14.75 1523178 400.2 422.9 253.1 26.53 1830 1839 -17.14 601720 481.9 447.2 293.7 25.13 1820 1829 -14.38 1256660 318.5 299 167.3 32.79 1810 1819 -13.59 426154 606.5 625.6 363.7 21.21 1800 1809 -17.83 290472 393 476.2 321.3 21.26 1790 1799 -15.17 1934308 430.4 404 192.3 22.25 1780 1789 -14.39 458394 426.2 388 266.3 28.21 1770 1779 -13.96 1284430 503.4 459.7 270.5 34.39 1760 1769 -14.86 2154554 365.6 321.8 243.5 32.52 1750 1759 -15.6 621297 585.4 561.4 357.8 36.65 1740 1749 -15.16 655152 497.7 516.8 376.1 34.03 1730 1739 -13.24 1452726 402.7 381 290.4 41.59 1720 1729 -14.92 1026179 527.5 367.6 219.9 26.79 1710 1719 -15.11 1643897 394.2 355.8 220.4 23.67 1700 1709 -15.61 1151496 374.7 293.3 184.9 29.43 1690 1699 -14.07 902695 245.9 205.1 186.1 35.95 1680 1689 -15.51 493936 505.3 380 259.3 35.89 1670 1679 -15.12 765993 408.7 300.3 231.1 33.43 1660 1669 -13.44 3318564 312.3 291.6 197.9 31.01 1650 1659 -12.59 754380 281.2 269 184.2 30.6 1640 1649 -13.47 629785 609.6 570.2 399 46.7 1630 1639 -14.15 727435 573.4 516.5 319.3 34.56 1620 1629 -12.91 1699763 593.1 492.2 313 37.13 1610 1619 -13.44 462761 580.5 589.7 351.8 31.98 1600 1609 -13.7 986834 435.2 281.9 205.5 31.1 1590 1599 -14.33 753654 307.6 290.4 183.6 35.16 1580 1589 -14.2 558047 855.6 1039.6 439.9 37.87 1570 1579 -14.41 2501921 383.5 478.3 211.3 27.91 1560 1569 -14.36 1153537 408.9 587.8 301.2 31.38 1550 1559 -11.79 2350445 461 507 197 31.62 1540 1549 -14.56 1416932 556.7 480.4 201.7 30.48 1530 1539 -14.68 908925 662.1 1159.3 450 41.94 1520 1529 -12.86 805315 414.6 508.2 278.3 32.29 1510 1519 -15.16 816778 423.8 549.1 294.6 35.44 1500 1509 -14.84 957480 430.1 644.1 325.8 35.39 1490 1499 -16.23 928406 323.5 326.6 220 34.35 1480 1489 -14.67 399499 328.5 376.1 256.8 27.05 1470 1479 -13.07 99012 224.7 262.8 173.3 24.1 1460 1469 -13.17 121967 78.7 66.8 68.7 28.37 1450 1459 -14.57 196148 196.6 234.2 152 28.38 1440 1449 -12.17 154856 31.1 18.8 45.5 29 1430 1439 -15.5 438745 2794 1448.5 1668.7 30.04 1420 1429 -13.14 3408040 476.1 416.2 285.5 35.34 1410 1419 -13.42 1434533 209.8 180.7 101.5 25.25 1400 1409 -12.96 1655265 298.8 354.9 158.4 27.94 1390 1399 -12.32 566316 601.8 749.8 453.2 31.83 1380 1389 -12.51 308359 1440.6 1489.5 728.5 30.97 1370 1379 -14.23 902396 953 1422.1 736.7 27.13 1360 1369 -13.92 706751 1443.4 2203.6 871 21.32 1350 1359 -14.58 477011 549 602.4 324.5 23.14 1340 1349 -14.17 516068 557.2 548.3 418 25.71 1330 1339 -14.83 970889 340.6 329.5 177.7 21.3 1320 1329 -13.34 1150388 362.9 275.8 215.7 20.79 1310 1319 -15.78 1049148 401.6 441.8 268.7 24.82 1300 1309 -13.93 3437623 340.8 336.4 146.6 22.91 1290 1299 -14.43 2417145 391.4 406 217 26.08 1280 1289 -16.21 1324835 331.8 410.9 232.6 21.18 1270 1279 -17.57 1023434 285.5 360 202.6 21.37 1260 1269 -16.91 452825 367.2 447.4 316.5 23.08 1250 1259 -17.58 1339952 650.4 933.7 432.6 25.34 1240 1249 -14.23 724560 160.6 141.8 185.6 26.13 1230 1239 -13.81 1550128 389.4 636.5 390 18.87 1220 1229 -13.53 1091290 449.9 451.4 247.5 23.47 1210 1219 -13.18 1641491 483.7 586.1 278.6 23.44 1200 1209 -15.38 1532648 383.1 416.7 281.8 15.13 1190 1199 -15.49 1397047 687.1 1087.1 536.3 24.61 1180 1189 -12.89 555048 298.6 329.7 173 25.4 1170 1179 -13.46 1836226 591.9 720.8 333 20.45 1160 1169 -12.77 1287858 230.5 299.1 181.5 19.79 1150 1159 -13.84 375072 501.1 802.1 501.4 19.95 1140 1149 -13.95 915625 502 606.5 357.1 24.87 1130 1139 -13.67 2365303 331.6 414.4 236.5 17.75 1120 1129 -12.12 705013 400.1 660 373.3 18.44 1110 1119 -14.95 912530 403.2 217.3 161.4 18.29 1100 1109 -14.46 556583 547.7 725.7 471.4 12.94 1090 1099 -12.52 1101872 434.3 433.6 272.5 19.67 1080 1089 -14.14 835997 311.6 356.2 239.7 21.28 1070 1079 -14.49 416685 523.1 864.3 585 25.29 1060 1069 -14.35 948016 383.5 466 241.4 21.65 1050 1059 -14.04 1529427 306.2 420.8 220.2 23.03 1040 1049 -14.58 1511601 340.1 470.2 264.2 20.8 1030 1039 -14.43 1183404 603.9 757.5 359.3 22.18 1020 1029 -13.83 1115514 653.9 917.3 407.1 17.75 1010 1019 -14.65 831745 585.2 807 458.4 23.44 1000 1009 -14.79 886123 622.7 604.9 346.8 17.71 990 999 -14.75 544129 529.7 438.5 258 980 989 -14.49 575496 549.5 708.6 339.1 970 979 -13.83 261740 602.6 1024.7 583.5 960 969 -16.36 1706469 448.1 378.6 239.1 950 959 -18.32 1414560 1000.6 1246.2 510.5 940 949 -15.39 697395 298.1 713.1 247.2 930 939 -14.37 576593 576.9 1124.7 391.9 920 929 -17.57 2096541 690.2 693.3 285.2 910 919 -13.75 1546877 641.6 615.1 264 900 909 -14.63 966685 718.5 841.3 415.3 890 899 -13.74 1052535 398.2 433.6 252.4 880 889 -16.64 631962 768.8 953.7 456.3 870 879 -14.58 681660 665.5 811.1 1087.5 860 869 -16.98 549111 856 1227.3 501.4 850 859 -18.71 587115 666.6 909.9 416.8 840 849 -18.42 530640 857 1239.1 602.4 830 839 -17.54 1127528 678.3 759.5 411.8 820 829 -17.01 973376 598.1 703.6 267.7 810 819 -14.32 1654034 499.8 559.6 288.7 800 809 -13.97 1066680 274.2 446.9 177 790 799 -16.41 564960 1034.2 1229.4 473.4 780 789 -15.64 643969 648.2 694.5 354.9 770 779 -14.69 795998 703.7 1287.3 431.1 760 769 -16.82 807429 603.4 1370.4 387 750 759 -15.37 628129 514.2 1128.7 286.9 740 749 -19.08 316733 522.1 1139.6 321.5 730 739 -17.29 385538 611.3 747.3 518.4 720 729 -18.67 617020 524 755.1 383.1 710 719 -14.91 310056 215.3 199.4 160.5 700 709 -16.11 625038 817.7 1116.3 525.1 690 699 -15.24 1048708 320 284.1 193.2 680 689 -15.93 1183920 494.2 401.5 160.4 670 679 -14.6 1847111 397.5 313.2 201.8 660 669 -17.2 457929 567.9 712 342.9 650 659 -15.67 469573 398.9 512.5 228.3 640 649 -15.49 706864 567.6 698.7 303 630 639 -14.54 640851 386.3 510 252.8 620 629 -14.72 404866 384.6 546.2 224.4 610 619 -13.82 597915 269.1 395.6 206.6 600 609 -15.76 1179141 589.4 634.8 346.3 590 599 -15.58 751693 770.9 1091.8 544.3 580 589 -13.83 597104 624.9 1291.3 446.1 570 579 -14.52 889453 527.7 962.7 344.6 560 569 -14.51 723704 539.7 1037.4 384.6 550 559 -14.84 918570 923.5 2335.8 489 540 549 -15.09 1102847 639.4 906.5 292.2 530 539 -14.4 638980 440.7 750 223 520 529 -14.17 438946 752.3 1074.2 455.7 510 519 -15.48 1331970 1178.1 1363.8 562.6 500 509 -14.23 1177238 428.8 535.2 257 490 499 -15.34 519438 595.3 812.4 368.2 480 489 -17.3 636360 1063.8 596.3 248.6 470 479 -13.93 285480 614.2 632.8 370.4 460 469 -13.03 675280 553.4 1066 442.6 450 459 -13.56 1140024 371.1 604.7 327.9 440 449 -13.04 615480 627.5 783 439.5 430 439 -15.51 1120040 348.3 529 220 420 429 -14.95 438993 653.3 1479.2 517.8 410 419 -17.19 599625 735.5 824.5 387.5 400 409 -14.96 607965 392.5 590.5 350.5 390 399 -17.38 628773 496.2 640 316 380 389 -14.31 1057572 558.6 464.4 165.8 370 379 -14.92 908947 567.8 555.3 261.3 360 369 -16.27 561285 907.3 954.8 400.5 350 359 -14.95 803436 920 1197.3 478.8 340 349 -15.26 502956 309.7 279.2 145.7 330 339 -16.86 1042050 474 373.3 292.5 320 329 -18.02 304476 435 450.6 253.4 310 319 -15.53 846853 1038.3 640.3 347.8 300 309 -18.53 763834 1613.8 1163.5 636.5 290 299 -15.45 807440 765.8 1071.8 455.6 280 289 -15.93 886347 496 628.8 263.4 270 279 -19.32 2649189 450.5 336.5 175 260 269 -15.38 1830570 251 255.6 149 250 259 -14.84 1289880 826.4 939.8 287.8 240 249 -15.72 345912 482.8 592.6 239 230 239 -14.91 561080 85.7 101.7 52.7 220 229 -18.23 735867 309.8 421.8 193.4 210 219 -16.24 558420 625.6 823.8 411 200 209 -16.3 1886240 412.5 691.3 231 190 199 -14.57 408069 460 521.5 201 180 189 -17.04 784307 471.5 240.2 124.5 170 179 -16.59 894720 111.7 261.3 65.3 160 169 -15.76 489926 384.8 622.3 144.8 150 159 -14.2 612525 367 466.4 127.6 140 149 -14 516900 392.8 532.6 177.4 130 139 -14.71 284055 342.2 188.2 165 120 129 -13.74 386133 291 202.4 151.8 110 119 -18.07 499620 944 499 292.5 100 109 -15.38 303260 570.5 547.8 267.5 90 99 -16.37 244267 879 887.8 438.2 80 89 -14.06 1157120 225.8 110.6 112.6 70 79 -15.14 719400 662.3 448.8 198.8 60 69 -17.16 1578040 552.3 615 296 50 59 -16.06 324120 587.3 1263.7 388.3 40 49 -19.27 585120 262 184.8 147 30 39 -18.29 256406 748.5 895.8 460 20 29 -15.53 403533 874.2 1061.2 524 10 19 -14.52 282750 537.8 605.6 347.8 0 9 -17.11 629794 812.5 685.5 349.8 3. Guliya ice core 400-year averages of oxygen isotopes, dust, and ions Column 1: Year (KYrBP, End of Interval) Column 2: d18O (per mille) Column 3: Dust concentration (0.63 to 20 um in diameter, particles/mL) Column 4: Chloride (ppb) Column 5: Sulfate (ppb) Column 6: Nitrate (ppb) AgeKYr d18O Dust Chloride Sulfate Nitrate 0 -14.24 994861 436.7 422.7 275 0.4 -14.28 1141856 531 613.2 333.9 0.8 -15.06 1004156 509.2 651.5 351.7 1.2 -15.14 748232 570.2 846 343.2 1.6 -16.08 736586 562.7 583.1 265.9 2 -16.04 563084 702.6 882 424.2 2.4 -16.53 646212 498.5 500.5 288.8 2.8 -16.48 1151580 594.5 630.3 328.5 3.2 -17.89 558352 483.4 551 286.4 3.6 -17.52 601112 499.7 527.2 308.3 4 -17.6 1363823 417.8 431.7 193 4.4 -16.2 476102 776.2 565.6 332.3 4.8 -16.74 674341 568 560.4 392 5.2 -16.62 612553 634.5 829.3 368.4 5.6 -16.53 756312 472.4 599.5 319.7 6 -16.92 853908 532 553.3 266.7 6.4 -14.81 597256 833.1 1203.3 495.8 6.8 -13.12 700349 528.7 718.7 379.5 7.2 -12.39 927619 658.7 810.4 347.7 7.6 -12.91 879852 552.7 735.6 319.3 8 -15.19 852156 377.5 534.7 185.4 8.4 -12.5 944338 382.5 421.9 200.6 8.8 -12.76 784883 649.8 661.5 337.7 9.2 -13.3 462437 478.7 720.6 385.2 9.6 -12.59 1059983 416.6 530.2 263.8 10 -13.22 1226465 386.2 380.4 210.1 10.4 -13.9 573885 514.8 822.3 390.4 10.8 -11.67 1661984 857.1 502.6 277.2 11.2 -12.77 634882 548.9 585.3 301.3 11.6 -15.02 600082 420.1 415 250.3 12 -14.39 574115 432.8 407.2 232 12.4 -14.77 480483 550.8 637.7 305.6 12.8 -14.05 584656 1419.1 1699.7 496.4 13.2 -11.15 329792 162.3 243.1 75.7 13.6 -9.49 155623 180 242 73.9 14 -14.4 541446 737.9 1130.5 479.2 14.4 -14.04 902623 578 901 411.2 14.8 -16.43 535315 398.1 542.7 289.1 15.2 -14.53 753658 481 715.2 374.6 15.6 -17.31 822631 472.7 545.7 281.9 16 -14.55 749450 293.3 540.9 335.9 16.4 -17.66 787440 302.3 426.3 206.6 16.8 -17.36 1071689 594.8 851 383.4 17.2 -16.33 707264 354.8 605.9 306.8 17.6 -16.18 694436 347.4 479.1 205.8 18 -16.12 755462 593.9 999 453 18.4 -19.48 711630 461.2 550.9 289 18.8 -20.85 1039727 502.9 548.5 208 19.2 -19.4 1141355 743.1 623.6 241.9 19.6 -17.8 558574 921.3 830.1 503.1 20 -17.5 884155 520.3 519.1 285 20.4 -18.3 1212116 239.3 253.4 148.4 20.8 -18.3 675000 505.2 489 294 21.2 -17.64 896574 679.2 585.3 302.4 21.6 -18.15 1049397 651.2 469.3 232.3 22 -18.8 463425 513.8 425 219.6 22.4 -17.13 767164 454.2 397.5 190.6 22.8 -17.33 658649 845 853.8 283.5 23.2 -19.76 506013 954.1 806.3 337.1 23.6 -17.02 526539 665.9 732.4 404.5 24 -17.6 582588 471.2 372.6 260.1 24.4 -18.65 458807 397.6 446.8 201.1 24.8 -19.49 453324 394.1 287.3 172.1 25.2 -19.66 317562 838.1 825.2 422.5 25.6 -20.12 360658 940.3 1047.4 467.9 26 -18.2 502072 583.2 382.2 192.3 26.4 -19.65 335546 427.3 328 195 26.8 -18.9 496606 688.6 714.5 339.1 27.2 -19.88 791627 840.3 483.9 222.7 27.6 -20.6 623320 829.5 771.5 232.1 28 -19.47 1276744 735.7 677.9 241.3 28.4 -19.78 1776736 990.1 522.8 242 28.8 -18.61 1230105 632.5 662.1 338.4 29.2 -20.09 938892 957.6 822 271.1 29.6 -18.39 893029 771.9 1122.6 373.6 30 -19.61 1117846 583.4 563.1 308.4 30.4 -19.2 1345029 405.4 354.6 225.3 30.8 -20.15 1012712 568.6 733.4 379.1 31.2 -19.75 1526722 653.3 708.6 290.4 31.6 -17.8 817572 543.2 711.1 331.6 32 -17.57 1045640 591.1 597.2 263.9 32.4 -17.4 801629 757.9 1166.7 423.8 32.8 -16.08 1857240 716.6 794.7 293.2 33.2 -16.32 503148 993.3 1254.7 422.1 33.6 -15.34 1092140 921.4 1049.3 392.2 34 -12.74 864897 805.9 940.7 337.4 34.4 -11.87 1061249 795.2 852.3 257 34.8 -12.75 1495783 523.7 697.7 187.2 35.2 -14.99 1045899 1022.8 1417.4 336.6 35.6 -10.64 814934 919.9 1296.4 382.4 36 -11.79 1905985 548.9 586.4 239.8 36.4 -11.12 1190909 834.1 1402 378.7 36.8 -17.06 924509 576 905 348.6 37.2 -13.67 613542 727.8 1137.6 390.5 37.6 -16.22 880444 670.2 918.3 354.8 38 -14.73 817021 652.3 752.7 331 38.4 -14.19 431784 680.9 1002.9 392.1 38.8 -13.69 500104 833.4 803.3 298.6 39.2 -14.14 752668 479.4 831.2 306.8 39.6 -14.7 731112 345.8 451.4 260 40 -18.41 626871 420.8 290.7 189.3 40.4 -19.76 803280 628.4 664.8 261.7 40.8 -18.31 851840 446.3 555.4 262.4 41.2 -20.13 1043815 424.2 585.9 230.6 41.6 -16.71 860383 496.5 780.9 337 42 -15.94 590328 730.5 1028.9 346.4 42.4 -14.06 717951 476 456.9 223 42.8 -19.4 697273 312.2 269.9 157.4 43.2 -15.59 654221 594.2 814.8 297 43.6 -15.16 507773 773.2 1237.2 413 44 -15.66 1396800 658.9 507.6 226.3 44.4 -17.79 1374198 545.7 656.2 323.7 44.8 -16.38 1325705 716 671.4 319.4 45.2 -16.68 1167965 687 941.2 325.3 45.6 -16.35 853301 653.2 630.7 297.5 46 -19.64 1392370 642.7 701.8 280.3 46.4 -17.16 977440 517.7 601.3 223.3 46.8 -18.21 1019836 846.6 924 333.3 47.2 -17.65 986825 287 396.1 180.8 47.6 -17.73 973833 656.4 987.6 423.4 48 -17.54 1113905 702.1 584.6 277.8 48.4 -18.69 967283 438 697.1 200.8 48.8 -16.13 767806 538.6 740.4 232.1 49.2 -16.69 742431 646.2 848.4 320.5 49.6 -14.98 811780 955.8 1249.7 492.7 50 -14.7 812248 532.3 544.3 236.8 50.4 -15.22 645360 673.9 992.3 320.6 50.8 -14.97 647366 709.6 1026.1 348.3 51.2 -13.75 822750 665.8 917.8 323.3 51.6 -13.74 964191 806.3 1054.1 296.9 52 -14.07 887215 595.2 751.1 321.4 52.4 -14.32 949114 611.5 780.5 270.6 52.8 -17.92 543129 418.7 596.5 329.4 53.2 -16.57 421883 469.8 731.9 377.8 53.6 -14.41 821090 440.8 522.9 263.6 54 -14.87 598608 630.9 854.1 330.4 54.4 -13.84 891858 548.5 731.6 241.1 54.8 -13.75 1546902 555.6 684.4 248.4 55.2 -13.43 513000 587.3 694 321.5 55.6 -13.21 550668 623.5 876.8 338.4 56 -14.29 639318 556.9 738.9 281.7 56.4 -13.13 684388 333.4 390.3 186 56.8 -13.88 990328 517.8 585.6 274.6 57.2 -15.73 827213 388.4 489.4 238.8 57.6 -15.71 942920 303 249.7 204.5 58 -14.81 807300 509.4 580.9 313.1 58.4 -16.91 1934486 400.1 335.3 194.2 58.8 -17.3 937213 431.2 488.1 236.1 59.2 -16.52 712944 551.4 604.1 270.7 59.6 -17.1 645588 954.7 876.4 373.4 60 -17.7 1372893 592.7 614.5 322.2 60.4 -18.16 1079640 547.2 654.6 307.8 60.8 -17.21 1102080 519.1 629.5 296.8 61.2 -19.25 763853 548.5 844.8 375.6 61.6 -17.82 1310388 720.5 498.9 349.2 62 -19.65 1625760 685.2 687.1 378.7 62.4 -18.63 1513776 534.7 445.5 255.1 62.8 -17.62 812844 509.3 613.4 323 63.2 -19.23 1047732 480.8 497.7 309 63.6 -18.61 1495068 498.5 506.2 246.1 64 -17.95 1534968 591.7 521.6 274.4 64.4 -18.64 1452192 664.9 576.5 260.8 64.8 -18.42 2035320 499.4 491.6 287.1 65.2 -17.75 1062345 720.5 619.1 300.6 65.6 -19.27 1380703 519.8 428.3 279.9 66 -20.03 1183303 601.4 553.3 282.3 66.4 -18.63 1239806 512.9 584.1 256.3 66.8 -18.13 1430314 407.7 522 255.4 67.2 -19.19 1067503 797.3 615.1 225.1 67.6 -19.5 1016550 512.3 706.1 285.4 68 -19.79 1039457 666.6 549.8 236.3 68.4 -18.88 818475 882.5 890.9 320.3 68.8 -18.11 950846 429.3 466.1 255.3 69.2 -18.7 1024611 737 771.9 429.3 69.6 -20.03 1824617 557 542.6 298.9 70 -19.57 1294834 628 574.6 326.4 70.4 -21.09 1338549 570.5 463.3 259.8 70.8 -20.47 1572120 586.3 459 304 71.2 -18.56 5114777 538.2 660 370.8 71.6 -17.78 6031110 445.8 461.4 267.4 72 -18.12 998100 622.9 599.4 253.5 72.4 -19.04 1387243 581.1 601.9 282.8 72.8 -18.35 1060860 904.8 646.3 291 73.2 -20.07 1887173 632.7 767.1 321 73.6 -19.16 1891213 512.3 431 233.3 74 -19.54 881587 693.4 549.1 230 74.4 -19 764427 1018.4 917.4 413.9 74.8 -19.45 1514074 733.1 783.5 365 75.2 -15.76 1283394 782.1 960 349 75.6 -13.68 1314287 852.3 1132.8 354.6 76 -12.49 1296006 664.4 712.4 276.7 76.4 -13.84 1121371 697.9 916.5 315.3 76.8 -14.98 618234 539.9 795.5 354.1 77.2 -13.72 580434 479.7 568.1 292.6 77.6 -14.25 1203930 498 588.8 292.8 78 -15.79 879113 460.6 499.9 275.5 78.4 -16.19 854587 339 417.3 289.2 78.8 -16.98 971615 395.5 541.6 260.5 79.2 -15.76 984048 507.9 609.8 299.7 79.6 -16.32 759558 453 545.4 304.5 80 -16.53 1007000 687.5 642.6 268 80.4 -16.54 1424712 480.8 676.2 283 80.8 -17.6 947526 571.4 679.2 309.6 81.2 -16.31 985938 564.4 506 288.1 81.6 -16.29 1014648 383.3 463.2 247.5 82 -16.73 908340 545.7 711.2 299.3 82.4 -16.82 1056743 589.2 705.7 273.4 82.8 -15.85 1102017 515.6 703.1 301.8 83.2 -15.36 1126131 475.3 542.2 241 83.6 -15.85 930528 544.9 667.4 280.3 84 -16.54 1084147 523.7 793.8 334.2 84.4 -16.96 723690 646.3 841.4 293 84.8 -17.41 801975 751.1 691.8 251.9 85.2 -18.49 921000 673.4 915.1 342 85.6 -18.64 1140547 509.6 815.9 301 86 -16.81 1398705 922.8 876.6 305.7 86.4 -17.17 1058440 454.7 490.2 239.2 86.8 -17.2 765813 499.4 572.8 248.2 87.2 -17.52 1096995 684.1 944.3 347.8 87.6 -15.09 903074 873.4 1025.7 453.5 88 -15.99 1510577 653.8 745.3 345.9 88.4 -17 797058 593.4 669.4 300.8 88.8 -17.69 1071730 449.3 851.6 303 89.2 -16.88 1071960 541.6 566.7 243.9 89.6 -17.06 1342468 628.1 657.1 303.7 90 -17.44 633990 694.8 770.8 340.1 90.4 -17.04 804452 518.4 733.4 295.2 90.8 -17.03 848776 658.9 662.6 234.9 91.2 -17.27 822261 884.3 580.1 290.4 91.6 -17.09 660400 702.8 685.1 293.1 92 -17.12 900630 580.2 624 234.1 92.4 -19.36 1034987 519.8 575.6 193.2 92.8 -17.8 731147 551.5 758.8 265.6 93.2 -16.72 1187213 697.9 795.2 260 93.6 -18.19 1178172 542.8 591 228.4 94 -17.11 1076376 545.1 570.3 266.4 94.4 -16.32 811512 572.1 647.9 306.5 94.8 -15.93 1077504 636.9 706.3 197.7 95.2 -15.19 1081536 622.5 605.6 239 95.6 -15 836604 394.5 233.3 144.5 96 -15.52 464460 733.7 554.4 289.1 96.4 -16.36 505123 557.4 673.8 294.9 96.8 -14.5 597223 474.8 506.6 224.8 97.2 -14.52 612560 595.6 833.2 320.5 97.6 -14.01 784718 702.6 901.3 349.6 98 -13.51 869955 514.2 756.9 281.2 98.4 -14.07 1137034 365 610.4 258.8 98.8 -13.39 1345454 586.3 800.7 280.7 99.2 -14.09 733440 463.2 696.8 239.5 99.6 -14.05 701777 489.5 685.6 285.9 100 -13.7 924100 488.3 636.5 280.6 100.4 -14.29 743324 494.3 671.7 268.4 100.8 -14.3 682926 372.6 579.2 306.6 101.2 -14.97 695792 444.9 612.5 297.7 101.6 -15.12 666595 454.2 680.7 287.2 102 -15.15 605248 463 658.6 266.5 102.4 -15.25 485116 447 613.2 316.2 102.8 -14.43 563005 326.5 420.5 264.9 103.2 -15.69 677460 412.5 525.3 300.9 103.6 -16.38 783549 476.4 725.9 307.5 104 -16.92 559311 494.4 541.1 250.7 104.4 -18.05 665610 395 528.6 285.2 104.8 -17.08 731420 394 506.8 292.7 105.2 -17.21 591285 505.4 563.6 277 105.6 -18.02 727640 525.7 803 295.6 106 -17.64 733860 486.3 590.9 281.1 106.4 -16.83 709584 427.6 427.6 283.2 106.8 -18.31 656616 393.4 502.6 270.2 107.2 -17.35 574500 497 634.3 292 107.6 -17.39 793200 442.5 585.5 331.8 108 -17.81 719910 362.3 425.3 249.3 108.4 -17.61 813150 520 676.5 287.8 108.8 -17.96 785304 582.4 818.2 304.4 109.2 -18.13 586140 418.4 519.8 262.6 109.6 -16.48 748740 416 550 265.8 110 -14.14 722580 440.5 629.8 274 110.4 -12.26 845820 602.4 867.2 256.6 110.8 -11.79 420000 395.5 523.5 217.3 111.2 -12.7 525440 680.3 1237.8 383 111.6 -11.7 666600 575 819 313.8 112 -10.41 714640 509.7 799.3 299 112.4 -11.99 697860 360 617.8 270.2 112.8 -13.89 480150 406 637.5 273.8 113.2 -11.78 948450 704.6 1175.4 360.6 113.6 -13.42 876390 377.5 532.3 235 114 -11.98 615696 354.4 561.2 257.6 114.4 -12.24 817230 532.6 1043.2 295 114.8 -13.17 765060 772.3 1090.8 333 115.2 -12.33 936090 542 913 307.3 115.6 -13.59 684630 679.2 1050.4 308.2 116 -12.65 459720 512 720 323 116.4 -13.28 671580 686.5 920.3 309 116.8 -13.47 548970 594.4 800 322.4 117.2 -13.33 534210 519 773.3 285.3 117.6 -12.7 552060 579 814.4 304.2 118 -15.23 578520 598.3 736.3 297.3 118.4 -11.85 499520 580.8 884.8 261.8 118.8 -12.81 598410 614.8 876 284.3 119.2 -15.1 662130 683.8 1023.8 373.5 119.6 -13.04 631425 810.5 949.5 315.7 120 -12.18 731760 546.7 823.6 287.8 120.4 -13.68 566760 619.5 1013.3 323.8 120.8 -13.8 537810 515 834.8 283.3 121.2 -13 564450 715.8 1267.5 326.8 121.6 -13.57 469680 438 766.5 292.5 122 -15.22 530250 408.5 653.5 263 122.4 -15.17 466560 471 636.3 247.5 122.8 -13.23 444030 524.3 784.3 299.8 123.2 -13.48 689340 566.3 717 316.5 123.6 -13.31 630510 528.2 805.8 300.6 124 -13.8 616480 433 746.3 272 124.4 -12.95 527940 471.5 675.8 289.8 124.8 -13.27 558510 599.2 857 331 125.2 -12.29 484650 587.5 915.5 359.5 125.6 -13.21 419940 537.5 747 399.5 126 -12.87 591060 502 785 379.5 126.4 -13.05 562110 594.8 981.3 337 126.8 -13.15 503220 588.5 734.3 317.8 127.2 -12.4 589950 687.2 864.4 303.8 127.6 -13.37 387240 439.3 651.3 291.8 128 -14.64 347970 550.8 770.5 323.8 128.4 -13.24 481320 633 1075.8 342.8 128.8 -12.2 434760 647.6 978.6 339.2 129.2 -12.39 529080 672 1010 357.5 129.6 -12.09 627450 618.5 880.8 350.8 130 -12.24 719670 699.3 1160.3 354.3 130.4 -13.11 827840 708.7 1049 358.7 130.8 -12.7 463320 598.4 848.8 307.6 131.2 -13.86 395190 554.3 856 322 131.6 -13.84 446370 472.8 663.8 286 132 -14.16 434820 405.2 486.6 239.4 132.4 -14.15 574848 365.6 503.2 248.6 4. Chlorine-36 data shown in Figures 2 and 4 of Thompson et al. (1997) Column 1: Sample depth (m) Column 2: 36Cl (per gram x10^4) Column 3: 36Cl Error (%) Column 4: Age (KyrBP, GISP2 CH4 matched) Depth 36Cl/g Error Age 10.42 0.21 7 0.083 13.88 0.149 12 0.112 40 0.213 7 0.329 62.59 0.313 8.1 0.532 82.36 0.242 8.2 0.831 136.07 0.271 7.1 7.279 170.71 0.289 6.9 27.173 178.45 0.326 8 34.059 179.5 0.234 10 34.833 180.5 0.291 9 35.389 181.5 0.329 8 35.944 182.55 0.323 9 36.528 183.6 0.452 8 37.111 184.65 0.234 9 37.617 185.65 0.295 10 37.95 186.65 0.319 9 38.283 204.55 0.246 8.9 51.868 218.76 0.22 7 69.2 223.5 0.155 11 75.797 239.53 0.211 8 88.011 249.97 0.231 9.3 96.981 254.17 0.217 8.7 99.633 263.63 0.24 7 105.383 286.14 0.179 7 291.37 0.186 10.4 296.55 0.117 12.4 305.44 0.054 14