GISP2 and Taylor Dome Ice Core N2O Data --------------------------------------------------------------------- NOAA Paleoclimatology Program and World Data Center for Paleoclimatology, Boulder --------------------------------------------------------------------- NOTE: PLEASE CITE ORIGINAL REFERENCE WHEN USING THIS DATA!!!!! NAME OF DATA SET: GISP2 and Taylor Dome Ice Core N2O Data LAST UPDATE: 8/2003 (Original Receipt by WDC Paleo) CONTRIBUTOR: Todd Sowers, Pennsylvania State University IGBP PAGES/WDCA CONTRIBUTION SERIES NUMBER: 2003-054 SUGGESTED DATA CITATION: Sowers, T., et al., 2003, GISP2 and Taylor Dome Ice Core N2O Data, IGBP PAGES/World Data Center for Paleoclimatology Data Contribution Series #2003-054. NOAA/NGDC Paleoclimatology Program, Boulder CO, USA. ORIGINAL REFERENCES: Sowers, T., R.B. Alley, and J. Jubenville, 2003, Ice Core Records of Atmospheric N2O Covering the Last 106,000 Years, Science, Volume 301, Number 5635, pp. 945-948, Aug 15 2003. GEOGRAPHIC REGION: Global PERIOD OF RECORD: 106 KYrBP - present ABSTRACT: Paleoatmospheric records of trace-gas concentrations recovered from ice cores provide important sources of information on many biogeochemical cycles involving carbon, nitrogen, and oxygen. Here, we present a 106,000-year record of atmospheric nitrous oxide (N2O) along with corresponding isotopic records spanning the last 30,000 years, which together suggest minimal changes in the ratio of marine to terrestrial N2O production. During the last glacial termination, both marine and oceanic N2O emissions increased by 40 +/- 8%. We speculate that our records do not support those hypotheses that invoke enhanced export production to explain low carbon dioxide values during glacial periods. DESCRIPTION: Ice Core Records of Atmospheric N2O from the Greenland Ice Sheet Project 2 (GISP II) core (72 36'N, 38 30'W, elev. 3200 masl) and the Taylor Dome, Antarctica, core (77 47'S, 158 43'E, elev. 2365 masl), plus isotopic data of N2O for Taylor Dome. DATA: 1. GISP2 N2O concentration data Depth in meters below surface (+/- 0.01m) Gas age in Kyears before present (+/- 5-1,000 years) N2O Concentration in ppbV (+/- 4 ppbV) Uncertainty in +/- ppbV GISP II Gas Age [N2O] Uncertainty Depth (mbs) (kyr BP) (ppbV) (± ppb) 116 0.132 267.6 2.2 116.08 0.132 263.6 4.4 116.08 0.132 266.5 2.3 116.3 0.137 268.9 4.4 119.61 0.149 274.5 2.5 119.81 0.149 261.5 4.4 120.01 0.149 264.8 2.2 120.21 0.149 270.5 4.5 200.8 0.507 264.4 4.3 206.1 0.530 259.0 4.5 319.7 1.033 261.9 2.2 424 1.527 264.0 2.4 523.1 2.026 284.0 2.3 523.2 2.027 264.7 2.7 617.7 2.524 264.0 4.5 709.9 3.047 262.0 2.5 790.2 3.524 265.5 5.1 871.4 4.019 258.5 4.3 950.4 4.532 267.9 4.3 950.9 4.536 278.2 4.6 1023.8 5.030 257.5 4.3 1091.35 5.519 236.1 2.2 1159.3 6.050 224.9 5.5 1218.9 6.526 219.9 4.6 1279.55 7.036 192.0 4.8 1279.6 7.036 248.7 5.9 1335.4 7.514 222.4 4.8 1394 8.040 224.5 2.3 1443.9 8.519 236.1 4.3 1495 9.026 245.8 2.4 1541.2 9.521 249.1 4.4 1557.1 9.701 287.2 5.1 1557.2 9.702 266.6 2.2 1575.1 9.914 262.5 4.4 1592.22 10.120 263.3 2.3 1624.1 10.523 276.2 2.6 1638.1 10.716 268.9 2.3 1667 11.138 264.4 4.4 1679.9 11.364 262.5 4.9 1695.2 11.629 253.4 4.4 1701 11.788 249.2 3 1707.2 12.009 255.3 2.3 1716.2 12.294 234.5 4.6 1720.6 12.453 236.9 4.4 1726.22 12.705 253.5 4.9 1734.22 12.968 252.2 4.3 1766.22 13.740 257.2 4.5 1804.8 14.546 284.0 2.7 1816 14.750 225.6 4.4 1833.34 15.374 206.4 2.1 1848.91 15.982 185.4 4.5 1853.5 16.163 184.8 5.1 1863.8 16.585 183.2 2.8 1872.6 16.985 202.3 3.1 1876.1 17.159 186.9 2.1 1880 17.362 201.9 2.5 1881.9 17.466 195.0 4.4 1894.5 18.157 262.5 3.1 1898.22 18.367 198.3 2.5 1919.1 19.344 198.4 4.5 1979.1 22.324 199.6 2.3 2004.1 23.458 180.5 4.3 2016.1 24.370 188.1 2.4 2031 25.480 246.2 2.9 2045 26.464 196.7 4.6 2057 27.351 212.7 2.1 2074.1 28.162 209.2 4.4 2100.1 29.459 200.2 4.7 2114.1 30.394 218.5 3.2 2123.1 31.387 222.0 5.3 2195.2 35.345 211.9 2.1 2205.1 36.332 231.6 4.6 2220.22 37.360 265.4 6 2237.2 38.224 240.2 4.5 2254.2 39.314 208.4 4.4 2271.21 40.372 218.8 3.1 2326.8 43.393 226.5 4.3 2380.25 46.382 221.8 4.3 2395.1 47.349 228.4 2.1 2411 48.387 250.6 2.2 2425.9 49.386 251.8 4.4 2437.03 50.384 254.5 5.3 2449 51.369 257.5 4.5 2460.1 52.239 269.8 2.1 2493 56.385 266.9 3.3 2511 58.148 257.4 3.1 2521.9 59.370 216.2 2.8 2529.9 60.433 200.2 4.7 2545 62.313 202.4 5.1 2567 65.740 218.0 4 2571.9 66.741 229.6 2.3 2577.9 67.582 248.9 4.8 2591.95 69.103 232.2 4.5 2599.32 70.756 252.9 3.8 2603.9 71.505 265.0 2.1 2609.9 72.441 270.3 2.7 2617.2 72.953 270.0 4.9 2629.9 75.453 249.7 4.4 2635.9 76.418 264.4 4.3 2642.1 77.408 254.3 2.7 2664.1 81.345 268.3 2.7 2669.1 82.311 280.9 4.4 2674.1 83.276 280.7 3 2679.1 84.190 265.6 4.5 2684.1 85.132 260.7 4.4 2689.1 86.123 235.0 4.5 2707 90.379 249.7 2.5 2723.1 94.370 256.4 2.5 2739 98.477 258.4 2.3 2759 102.342 240.8 3 2780.1 106.304 254.6 2.5 2. Taylor Dome N2O concentration and isotope data Depth in meters below surface (+/- 0.01m) Gas age in Kyears before present (+/- 5-1,000 years) N2O Concentration in ppbV (+/- 4 ppbV) d15N of N2O, permil wrt Atm. N2 (+/- 0.5 permil) d18O of N2O, permil wrt SMOW (+/- 2 per mil) depth gas age [N2O] d15N of N2O d18O of N2O (mbs) (kyr BP) (ppbV) (‰ wrt Atm N2) (‰ wrt SMOW) 156.4 2.5 271.7 11.6 47.4 237.45 4.6 251.6 10.5 46.6 344.35 9.3 248.0 10.1 43.4 359.75 11.5 270.2 10.0 44.6 361.75 11.7 271.5 10.5 42.7 362.78 11.8 246.9 11.9 45.9 367.2 12.1 240.0 11.6 46.8 368.35 12.2 245.6 11.8 48.2 371.35 12.9 262.7 12.0 46.4 375.75 14.3 260.1 10.7 49.8 377.75 15.3 224.3 9.4 47.9 379.75 18.0 235.0 11.8 46.8 382.25 22.7 191.5 11.6 46.3 382.75 23.6 190.7 10.3 43.9 386.76 27.8 195.9 11.0 47.2 388.66 28.9 224.3 10.6 48.7 390.85 30.1 228.5 11.8 46.8 392.75 31.2 218.0 12.2 47.0 395.25 32.7 225.6 11.5 46.3