Oxygen isotopes -- snowpits; GISP2 Site 37 REFERENCES: Bolzan, J.F., and M. Strobel. 1994. Accumulation-rate variations around Summit, Greenland. Journal of Glaciology 40:56-66. DATA DESCRIPTION: These files contain oxygen-isotope profiles for 9 shallow cores (to approximately 17 m depth) recovered over a 150 x 150 km survey grid in central Greenland. All cores were recovered in May, 1987. Isotopic data in the upper 2 m of each profile were from the shallow drilling pits. Details on the site location, the core recovery, and the assignment of core loss are given in Bolzan and Strobel, (1994). For the data below, all depths are in cm. Dating of samples was based on the seasonal variation in the oxygen isotope stratigraphy, along with measurements of gross beta activity (see Bolzan and Strobel, 1994). Time is in decimal years, where 87 = 1987, etc. For the data below the sample size was 10 cm for the upper 2 m (pit wall), and 5 cm below that (core). All depths are in cm. The first 2 columns refer to the true depth and age at the top of the sample, where the age is based on a spline interpolation of the dating described in Bolzan and Strobel (1994). The time is in decimal calendar years. Column 3 is density in kg/m3. Column 4 are the O18 values in per mil. Column 5 is the ice-equivalent depths at the top of the sample. SITE 37: N 72 38 27, W 35 56 40, 3160 m DATA: Depth Top Cal. Year Density del18O Ice depth (cm) Top kg/m^3 (per mil) (cm) 0 1987.46 310.28 -31.52 0 10 1987.35 364.45 -37.33 3.38 20 1987.21 369.95 -35.59 7.35 30 1987.07 387.4 -40.51 11.38 40 1986.93 359.86 -36.28 15.6 50 1986.79 314.87 -33.58 19.52 60 1986.68 309.37 -34.04 22.95 70 1986.56 314.87 -32.38 26.32 80 1986.44 342.41 -33 29.75 90 1986.3 368.12 -39.71 33.48 100 1986.12 383.72 -43.66 37.49 110 1985.87 308.45 -34 41.67 120 1985.63 338.74 -31.51 45.03 130 1985.38 381.89 -34.95 48.72 140 1985.14 395.66 -34.68 52.88 150 1985 383.72 -34.45 57.19 160 1984.97 399.33 -33.23 61.37 170 1984.98 410.35 -34.1 65.72 180 1984.91 359.86 -30.89 70.19 190 1984.7 374.54 -30.33 74.11 200 1984.13 416.77 -39.26 79.09 205 1983.9 416.77 -36.78 81.36 210 1983.77 416.77 -34.48 83.63 215 1983.7 405.96 -34.28 85.9 219.5 1983.67 378.22 -34.15 87.89 224.5 1983.63 378.22 -33.13 89.95 229.5 1983.56 378.22 -32.2 92.01 234.5 1983.43 378.22 -33.87 94.07 239.5 1983.25 378.22 -38.89 96.13 244.5 1983.07 378.22 -41.22 98.19 249.5 1982.95 378.22 -39.98 100.25 254.5 1982.9 378.22 -38.82 102.31 259.5 1982.9 378.22 -37.84 104.37 264.5 1982.92 378.22 -37.75 106.43 269.5 1982.94 378.22 -38.38 108.49 274.5 1982.95 370.87 -36.44 110.55 279.5 1982.9 347 -35.84 112.57 284.5 1982.8 347 -35.67 114.46 289.5 1982.63 359.86 -34.62 116.35 294.5 1982.35 362.19 -35.61 118.31 300 1982 372.21 -34.92 120.48 305.5 1981.76 398.41 -32.26 122.71 310.5 1981.63 396.58 -30.88 124.88 315.5 1981.55 398.41 -28.84 127.04 320.5 1981.5 396.57 -28.99 129.21 325.5 1981.43 409.43 -31.17 131.37 330.5 1981.33 409.43 -35.18 133.6 335.5 1981.21 409.43 -38.17 135.83 340.5 1981.07 409.43 -39.41 138.06 345.5 1980.92 408 -38.08 140.29 350 1980.77 392.24 -35.47 142.29 355.5 1980.59 391.07 -34.49 144.64 360.5 1980.41 391.07 -36.18 146.77 365.5 1980.23 392.9 -37.96 148.9 370.5 1980.07 391.07 -38.75 151.04 375.5 1979.94 391.07 -38.13 153.17 380.5 1979.77 394.74 -37.88 160.74 385.5 1979.75 402.08 -37.64 162.89 390.5 1979.74 414.93 -37.58 165.08 395.5 1979.71 414.94 -37.05 167.34 400.5 1979.65 416.77 -35.91 169.6 405.5 1979.56 413.1 -35.25 171.87 410.5 1979.43 411.27 -36.47 174.12 415.5 1979.26 411.27 -38.58 176.36 420.5 1979.08 409.43 -39.59 178.6 425.5 1978.93 411.27 -38.13 180.83 430.5 1978.81 409.43 -33.83 183.07 435.5 1978.69 409.43 -31.69 185.3 440.5 1978.57 383.72 -30.69 187.53 445.5 1978.42 385.56 -31.79 189.62 450.5 1978.25 383.72 -34.09 191.72 455.5 1978.08 387.4 -36.2 193.81 460.5 1977.93 414.93 -35.72 195.92 465.5 1977.8 416.77 -35.52 198.18 470.5 1977.69 414.94 -35 200.45 475.5 1977.57 414.93 -33.71 202.71 480.5 1977.42 416.77 -33.78 204.97 485.5 1977.26 427.79 -35.17 207.24 490.5 1977.08 459 -35.46 209.57 495.5 1976.92 457.16 -35.2 212.07 500.5 1976.8 459 -34.46 214.56 505.5 1976.7 457.17 -33.06 217.06 510.5 1976.62 459 -31.93 219.55 515.5 1976.54 446.15 -31.4 222.05 520.5 1976.46 442.48 -33.34 224.48 525.5 1976.37 442.48 -36.34 226.89 530.5 1976.28 442.48 -39.3 229.3 535.5 1976.17 442.47 -40.73 231.71 540.5 1976.06 442.48 -41.34 234.12 545.5 1975.94 444.31 -40.3 236.53 550.5 1975.81 442.48 -37.17 238.95 555.5 1975.68 438.8 -33.73 241.36 560.5 1975.56 436.97 -31.85 243.75 565.5 1975.44 436.97 -32.82 246.13 570.5 1975.33 436.97 -35.38 248.51 575.5 1975.23 436.97 -38.83 250.89 580.5 1974.88 444.31 -40.7 260.21 585.5 1974.8 446.76 -41.32 262.63 590 1974.72 453.49 -39.71 264.82 595 1974.64 453.49 -36.97 267.29 600 1974.55 447.32 -34.97 269.76 605.5 1974.45 425.95 -35.44 272.44 610.5 1974.35 425.95 -37.29 274.76 615.5 1974.23 425.62 -38.3 277.08 621 1974.08 444.72 -39.12 279.63 625.5 1973.91 444.31 -38.89 281.81 630.5 1973.71 446.15 -37.67 284.23 635.5 1973.5 444.31 -37.71 286.66 640.5 1973.31 442.48 -38.7 289.08 645.5 1973.15 442.48 -39.42 291.49 650.5 1973 442.48 -39.35 293.9 655.5 1972.86 442.48 -38.33 296.31 660.5 1972.74 438.8 -35.64 298.72 665.5 1972.63 436.97 -33.16 301.11 670.5 1972.54 436.97 -32.37 303.49 675.5 1972.47 435.13 -32.64 305.87 680.5 1972.38 462.67 -33.96 310.91 685.5 1972.35 460.84 -35.25 313.43 690.5 1972.32 466.35 -36.32 315.94 695.5 1972.29 466.34 -36.95 318.48 700.5 1972.24 471.85 -36.42 321.02 705.5 1972.17 481.03 -37.96 323.59 710.5 1972.07 479.2 -39.15 326.21 715.5 1971.92 481.03 -38.52 328.82 720.5 1971.75 481.03 -35.98 331.44 725.5 1971.58 481.03 -34.17 334.06 730.5 1971.43 488.38 -34.35 336.68 735.5 1971.3 488.38 -34.67 339.34 740.5 1971.16 488.38 -35.31 342 745.5 1971 471.85 -35.14 344.66 750.5 1970.8 464.51 -33.62 347.23 755.5 1970.59 464.51 -32.18 349.76 760.5 1970.43 464.51 -32.55 352.29 765.5 1970.31 464.51 -35.17 354.82 770.5 1970.23 464.51 -37.83 357.35 775.5 1970.15 453.49 -38.95 359.88 780.5 1970.06 442.48 -39.75 362.35 785.5 1969.93 449.82 -39.41 364.76 790.5 1969.76 455.33 -36.42 367.21 795.5 1969.59 479.19 -32.94 369.69 800.5 1969.42 477.36 -33.19 372.3 805.5 1969.29 479.2 -35.14 374.9 810.5 1969.16 477.36 -36.24 377.51 815.5 1969 479.2 -36.12 380.11 820.5 1968.8 475.52 -34.51 382.72 825.5 1968.59 473.69 -33.71 385.31 830.5 1968.42 473.69 -34.32 387.89 835.5 1968.29 470.68 -35.79 390.47 841 1968.17 471.85 -37.61 393.29 846 1968.06 470.02 -38.11 395.86 851 1967.93 470.02 -37.03 398.42 856 1967.78 471.85 -36.23 400.98 861 1967.6 470.02 -35.36 403.55 866 1967.4 471.85 -35.8 406.11 871 1967.19 470.02 -36.63 408.68 876 1967 503.88 -36.69 411.24 880.5 1966.84 503.07 -36.06 413.71 885.5 1966.57 459 -34.62 418.51 890.5 1966.42 459 -35.32 421.01 895.5 1966.25 459 -36.59 423.51 900.5 1966.08 459 -37.16 426.01 905.5 1965.92 460.83 -35.36 428.51 910.5 1965.76 497.56 -33.72 431.02 915.5 1965.59 508.57 -32.63 433.73 920.5 1965.4 479.19 -33.36 436.5 925.5 1965.22 361.69 -34.83 439.11 930.5 1965.09 506.74 -37.93 441.08 935.5 1964.92 506.74 -37.21 443.84 940.5 1964.79 506.73 -35.78 446.6 945.5 1964.68 506.74 -33.64 449.36 950.5 1964.59 506.74 -32.67 452.12 955.5 1964.5 506.74 -32.83 454.88 960.5 1964.4 506.73 -33.74 457.64 965.5 1964.3 515.92 -35.14 460.4 970.5 1964.19 519.59 -36.93 463.21 975.5 1964.07 519.59 -37.45 466.04 980.5 1963.93 514.08 -37.07 468.87 985.5 1963.79 489.6 -35.56 471.67 990 1963.66 488.38 -34.37 474.07 995 1963.5 510.41 -34.41 476.73 1000 1963.32 510.41 -35.25 479.51 1005 1963.12 512.24 -35.59 482.29 1010 1962.87 510.41 -34.72 485.08 1015 1962.61 510.41 -34.4 487.86 1020 1962.41 508.57 -36.22 490.64 1025 1962.27 501.23 -37.82 493.41 1030 1962.18 499.06 -39.58 496.14 1035.5 1962.09 510 -40.12 499.13 1040 1962 506.74 -40.35 501.63 1045 1961.87 508.57 -38.85 504.39 1050 1961.7 506.74 -37.21 507.16 1055 1961.5 508.57 -37.03 509.92 1060 1961.29 512.24 -38.94 512.69 1065 1961.09 510.41 -40.38 515.48 1070 1960.92 512.24 -38.91 518.26 1075 1960.77 512.25 -37.42 521.05 1080 1960.63 512.24 -36.04 523.84 1085 1960.5 521.42 -35.89 526.63 1090 1960.36 521.43 -36.61 529.47 1095 1960.21 521.43 -37.36 532.31 1100 1960.07 521.42 -37.66 535.15 1105 1959.94 525.09 -36.28 537.99 1110 1959.82 526.93 -35.66 540.85 1115 1959.71 525.1 -34.06 543.72 1120 1959.62 525.09 -33.52 546.58 1125 1959.54 517.75 -33.87 549.44 1130 1959.47 515.92 -33.55 552.26 1135 1959.41 515.74 -33.53 555.07 1140.5 1959.34 514.09 -35 558.16 1145.5 1959.27 512.24 -36.57 560.96 1150.5 1959.18 514.08 -36.79 563.75 1155.5 1959.07 514.08 -37.1 566.55 1160.5 1958.92 512.25 -36.42 569.35 1165.5 1958.75 514.08 -36.28 572.14 1170.5 1958.58 514.08 -35.84 574.94 1175.5 1958.42 514.08 -35.89 577.74 1181 1958.28 514.08 -36.74 580.82 1186 1958.16 523.26 -38 583.62 1191 1958.05 523.27 -39.04 586.47 1196 1957.95 523.26 -38.3 589.32 1201 1957.83 523.27 -37.23 592.17 1206 1957.71 523.26 -36.69 595.02 1211 1957.57 517.75 -35.88 597.87 1216 1957.42 515.92 -36.56 600.69 1221 1957.25 515.92 -38.24 603.5 1226 1957.08 515.92 -38.47 606.31 1231 1956.92 515.92 -37.93 609.12 1236 1956.78 473.69 -36.97 611.93 1241 1956.66 455.32 -35.9 614.51 1246 1956.55 536.52 -35.91 616.99 1250.5 1956.45 536.11 -35.8 619.62 1255.5 1956.33 537.95 -37.16 622.54 1260.5 1956.21 536.12 -37.72 625.47 1265.5 1956.07 536.52 -38.54 628.39 1270 1955.93 537.95 -36.79 631.02 1275 1955.75 536.11 -34.94 633.95 1280 1955.57 530.4 -34.29 636.87 1284.5 1955.43 483.49 -34.53 639.47 1289 1955.31 481.03 -35.45 641.84 1294 1955.19 550.8 -36.86 644.46 1299 1955.06 548.96 -37.69 647.46 1304 1954.94 548.96 -37.53 650.45 1309 1954.81 548.96 -37.17 653.44 1314 1954.68 536.11 -35.64 656.43 1319 1954.56 537.96 -35.24 659.35 1324 1954.44 537.95 -35.23 662.28 1329 1954.33 536.11 -36.8 665.21 1334 1954.21 537.95 -38.38 668.13 1339 1954.1 536.11 -39.47 671.06 1344 1954 537.95 -39.38 673.98 1349 1953.9 537.96 -38.59 676.91 1354 1953.8 530.77 -36.81 679.84 1359.5 1953.7 530.6 -34.79 683.02 1364.5 1953.62 528.77 -33.37 685.91 1369.5 1953.54 528.77 -32.99 688.79 1374.5 1953.46 539.12 -33.99 691.67 1380 1953.38 536.11 -35.49 694.9 1385 1953.3 519.59 -36.42 697.82 1390 1953.21 545.29 -37.19 700.65 1395 1953.08 543.46 -38.8 703.62 1400 1952.91 545.29 -36.88 706.58 1405 1952.71 543.46 -36.25 709.55 1410 1952.5 545.29 -35.99 712.51 1415 1952.3 545.3 -36.93 715.48 1420 1952.1 545.29 -37.66 718.45