# Law Dome, Antarctica 2000 Year Ice Core CO2, CH4, N2O and d13C-CO2 Data #----------------------------------------------------------------------- # World Data Service for Paleoclimatology, Boulder # and # NOAA Paleoclimatology Program # National Centers for Environmental Information (NCEI) #----------------------------------------------------------------------- # Template Version 3.0 # Encoding: UTF-8 # NOTE: Please cite Publication, and Online_Resource and date accessed when using these data. # If there is no publication information, please cite Investigators, Title, and Online_Resource and date accessed. # # Online_Resource: https://www.ncdc.noaa.gov/paleo/study/25830 # Description: NOAA Landing Page # Online_Resource: https://www1.ncdc.noaa.gov/pub/data/paleo/icecore/antarctica/law/law2018co2.txt # Description: NOAA location of the template # # Original_Source_URL: https://doi.org/10.25919/5bfe29ff807fb # Description: # # Description/Documentation lines begin with # # Data lines have no # # # Archive: Ice Core # # Dataset DOI: # # Parameter_Keywords: atmospheric gas, carbon isotopes #-------------------- # Contribution_Date # Date: 2018-12-14 #-------------------- # File_Last_Modified_Date # Date: 2018-12-14 #-------------------- # Title # Study_Name: Law Dome, Antarctica 2000 Year Ice Core CO2, CH4, N2O and d13C-CO2 Data #-------------------- # Investigators # Investigators: Rubino, M.; Etheridge, D.M.; Thornton, D.P.; Howden, R.; Allison, C.E.; Francey, R.J.; Langenfelds, R.L.; Steele, L.P.; Trudinger, C.M.; Spencer, D.A.; Curran, M.A.J.; Van Ommen, T.D.; Smith, A.M. #-------------------- # Description_Notes_and_Keywords # Description: Law Dome ice core (DSS, DSS0506, DE08 and DE08-2) and firn air (DE08-2 and DSSW20K) records of CO2, CH4 and N2O concentrations for the past 2000 years and d13C-CO2 for the past 1000 years. #-------------------- # Publication # Authors: Mauro Rubino, David Etheridge, David Thornton, Russell Howden, Colin Allison, Roger Francey, Ray Langenfelds, Paul Steele, Cathy Trudinger, Darren Spencer, Mark Curran, Tas Van Ommen, and Andrew Smith # Published_Date_or_Year: 2018-12-14 # Published_Title: Revised records of atmospheric trace gases CO2, CH4, N2O and d13C-O2 over the last 2000 years from Law Dome, Antarctica # Journal_Name: Earth System Science Data Discussions # Volume: # Edition: # Issue: # Pages: # Report_Number: # DOI: 10.5194/essd-2018-146 # Online_Resource: https://www.earth-syst-sci-data-discuss.net/essd-2018-146/ # Full_Citation: # Abstract: Ice core records of the major atmospheric greenhouse gases (CO2, CH4, N2O) and their isotopologues covering recent centuries provide evidence of biogeochemical variations during the Late-Holocene and Pre-Industrial Periods and over the transition to the Industrial Period. These records come from a number of ice core and firn air sites, and have been measured in several laboratories around the world and show common features, but also unresolved differences. Here we present revised records, including new measurements, performed at the CSIRO Ice Core Extraction LABoratory (ICELAB) on air samples from ice obtained at the high accumulation site of Law Dome (East Antarctica). We are motivated by the increasing use of the records by the scientific community and by recent data-handling developments at CSIRO-ICELAB. A number of cores and firn air samples have been collected at Law Dome to provide high resolution records overlapping recent, direct atmospheric observations. The records have been updated through a dynamic link to the calibration scales used in the Global Atmospheric Sampling LABoratory (GASLAB) at CSIRO, which are periodically revised with information from the latest calibration experiments. The gas-age scales have been revised based on new ice-age scales, and the information derived from a new version of the CSIRO firn diffusion model. Additionally, the records have been revised with new, rule-based selection criteria and updated corrections for biases associated with the extraction procedure, and the effects of gravity and diffusion in the firn. All measurements carried out in ICELAB-GASLAB over the last 25 years are now managed through a database (the ICElab dataBASE or ICEBASE) which provides consistent data management, automatic corrections and selection of measurements, and a web-based user interface for data extraction. We present the new records, discuss their strengths and limitations and summarise their main features. The records reveal changes in the carbon cycle and atmospheric chemistry over the last two millennia, including the major changes of the anthropogenic era and the smaller, mainly natural variations beforehand. They provide the historical data to calibrate and test the next inter-comparison of models used to predict future climate change (Coupled Model Inter-comparison Project - phase 6, CMIP6). The datasets described in this paper, including spline fits, are available at https://doi.org/10.25919/5bfe29ff807fb (Rubino et al., 2018). #------------------ # Funding_Agency # Funding_Agency_Name: CSIRO # Grant: #------------------ # Funding_Agency # Funding_Agency_Name: Department of Energy and Environment # Grant: #------------------ # Funding_Agency # Funding_Agency_Name: Australian Antarctic Science Program # Grant: #------------------ # Site_Information # Site_Name: Law Dome # Location: Antarctica # Country: # Northernmost_Latitude: -66.73 # Southernmost_Latitude: -66.73 # Easternmost_Longitude: 112.83 # Westernmost_Longitude: 112.83 # Elevation: 1390 m #------------------ # Data_Collection # Collection_Name: Law2018CO2 # Earliest_Year: 154 # Most_Recent_Year: 1996 # Time_Unit: Years CE # Core_Length: # Notes: Law Dome ice core (DSS, DSS0506, DE08 and DE08-2) and firn air (DE08-2 and DSSW20K) records of CO2 #------------------ # Chronology_Information # Chronology: # #---------------- # Variables # # Data variables follow are preceded by "##" in columns one and two. # Data line variables format: one per line, shortname-tab-variable components (what, material, error, units, seasonality, data type,detail, method, C or N for Character or Numeric data, free text) # ## SampleID Sample ID, , , , , , , ,C, ## age_ice ice age, ice, , year Common Era, , , , ,C, ## age_CO2 gas age, gas, , year Common Era, , , , ,N, ## CO2ppm carbon dioxide, , , parts per million, ,ice core,,,N, ## CO2err carbon dioxide, , , parts per million, ,ice core,,,N, carbon dioxide uncertainty ppm # #---------------- # Data: # Data lines follow (have no #) # Data line format - tab-delimited text, variable short name as header # Missing Values: # SampleID age_ice age_CO2 CO2ppm CO2err DSSW20K 15.8 firn 1996 359.87 0.02 DSSW20K 29 firn 1994 357.24 0.04 DE08-2 0 firn 1993 354.6 0.02 DSSW20K 37.8 firn 1992 353.89 0.04 DE08-2 10 firn 1991 352.6 0.18 DE08-2 15 firn 1991 352.0 0.25 DE08-2 20 firn 1990 351.4 0.07 DSSW20K 41.7 firn 1989 349.92 0.08 DE08-2 30 firn 1989 349.8 0.01 DE08-2 40 firn 1988 347.8 0.40 DE08-2 50 firn 1987 346.5 0.03 DE08-2 55 firn 1987 345.3 0.13 DE08-2 60 firn 1986 344.6 0.10 DE08-2 65 firn 1986 343.9 0.05 DE08-2 70 firn 1985 342.7 0.16 DSSW20K 44.5 firn 1983 341.45 0.14 DE08-2 75 firn 1983 339.6 0.28 DE08-2 80 firn 1979 335.5 0.00 DE08-2 008 1948 1979 335.5 0.6 DE08-2 012 1948 1979 332.4 0.9 DE08-2 003 1945 1976 331.5 0.6 DE08-2 85 firn 1976 332.6 0.04 DE08-2 002 1943 1974 328.4 0.9 DE08 331 1942 1973 330.4 2.1 DE08-2 033 1941 1972 326.4 1.3 DE08-2 052 1941 1972 326.5 1.2 DE08-2 005 1941 1972 324.5 0.6 DE08-2 015 1940 1971 325.5 0.6 DSSW20K 47 firn 1971 325.00 0.16 DE08-2 016 1939 1970 325.0 0.6 DE08 205 1939 1970 323.8 0.6 DE08 235 1938 1969 324.1 0.6 DE08 439 1938 1969 320.3 1.2 DE08-2 032 1937 1968 322.3 1.3 DE08-2 051 1936 1967 320.9 1.2 DE08 440 1936 1967 320.4 1.7 DE08 226 1935 1966 319.2 0.9 DE08 225 1935 1966 319.9 0.6 DE08 339 1933 1964 319.3 0.9 DE08 203 1933 1964 318.9 0.6 DE08 214 1932 1963 319.8 0.6 DE08 432 1932 1963 317.3 1.7 DE08 215 1932 1963 317.4 0.9 DE08 212 1932 1963 319.1 0.6 DE08 213 1932 1963 317.5 0.6 DE08-2 040 1931 1962 317.2 6.4 DSS 004 1902 1962 316.5 0.6 DE08-2 043 1930 1961 311.9 2.4 DE08 391 1930 1961 313.0 1.6 DE08 340 1928 1959 316.5 0.9 DE08 355 1927 1958 314.7 0.4 DSS0506 15 1898 1958 314.2 0.5 DE08 416 1926 1957 315.1 1.2 DSSW20K 49.5 firn 1957 316.45 0.04 DE08 354 1926 1957 314.4 0.4 DE08 415 1926 1957 314.5 1.2 DSS 001 1896 1956 314.4 0.6 DSS 002 1896 1956 315.4 0.6 DSS 003 1896 1956 315.9 0.6 DE08 464 1924 1955 314.6 0.5 DE08 465 1924 1955 313.7 1.0 DE08 297 1924 1955 314.9 2.1 DE08 298 1924 1955 314.7 2.1 DE08 236 1923 1954 313.1 0.6 DE08 201 1923 1954 312.7 0.6 DE08 208 1923 1954 311.6 0.6 DE08 324 1923 1954 312.8 2.1 DE08 350 1922 1953 312.3 0.4 DSS 029 1890 1950 312.0 0.6 DE08 314 1919 1950 313.7 2.1 DE08 351 1918 1949 309.8 0.4 DE08-2 009 1918 1949 310.4 0.6 DE08 317 1917 1948 311.6 2.1 DE08-2 034 1917 1948 311.0 4.8 DE08-2 035 1916 1947 310.8 3.2 DE08 304 1916 1947 313.3 2.1 DE08 305 1916 1947 312.6 2.1 DE08-2 023 1916 1947 310.3 2.5 DE08 307 1915 1946 312.6 2.1 DE08 352 1914 1945 311.4 0.4 DE08 227 1914 1945 310.2 0.6 DE08-2 025 1913 1944 311.8 2.5 DE08-2 026 1913 1944 313.7 2.5 DE08 327 1913 1944 312.4 2.1 DE08 308 1912 1943 311.7 2.1 DE08 309 1912 1943 312.2 3.2 DE08 310 1911 1942 312.8 2.1 DE08 311 1911 1942 312.1 2.1 DE08-2 007 1910 1941 310.9 0.6 DE08 303 1910 1941 311.9 2.1 DE08 423 1910 1941 307.6 1.2 DSS 037 1880 1940 309.7 0.6 DE08-2 030 1909 1940 312.0 1.3 DE08 240 1908 1939 311.0 0.6 DE08 243 1908 1939 311.4 0.6 DSS0506 08 1879 1939 306.7 0.8 DE08 302 1908 1939 312.3 3.2 DE08 422 1908 1939 308.4 1.2 DE08 473 1908 1939 307.8 0.7 DSS 027 1878 1938 308.5 0.6 DE08 300 1907 1938 310.7 2.1 DE08 301 1907 1938 312.4 2.1 DSSW20K 52 firn 1938 312.40 0.10 DE08 418 1906 1937 306.9 1.2 DE08 419 1906 1937 307.6 1.2 DE08 278 1905 1936 309.5 3.2 DE08 282 1905 1936 309.1 2.5 DE08 420 1905 1936 307.1 1.2 DE08-2 011 1904 1935 309.6 0.6 DE08 444 1904 1935 306.2 1.2 DE08 284 1903 1934 306.7 2.5 DE08 285 1903 1934 306.6 2.5 DE08 287 1903 1934 307.8 2.5 DE08 443 1902 1933 305.8 1.2 DE08 325 1902 1933 308.3 2.1 DE08 238 1902 1933 308.2 0.6 DE08 437 1900 1931 305.6 1.7 DE08 438 1900 1931 305.6 1.2 DE08 341 1898 1929 305.8 0.9 DSS 041 1869 1929 305.7 0.6 DE08 274 1897 1928 307.6 3.2 DE08 275 1897 1928 308.4 3.2 DSS 008 1868 1928 305.7 0.6 DE08 474 1895 1926 305.5 0.6 DE08 475 1895 1926 306.7 0.9 DE08-2 044 1895 1926 303.7 4.8 DE08 476 1895 1926 303.6 1.2 DE08 482 1895 1926 302.2 0.6 DE08 231 1894 1925 305.3 0.6 DE08 237 1894 1925 304.6 0.6 DE08 269 1892 1923 307.7 3.2 DE08 270 1892 1923 306.1 3.2 DE08 271 1892 1923 303.1 2.5 DE08 272 1892 1923 307.8 6.4 DE08 342 1892 1923 303.3 0.9 DE08 430 1889 1920 301.7 1.2 DE08 321 1888 1919 304.7 2.1 DE08 256 1887 1918 303.3 0.7 DE08 257 1887 1918 303.5 1.0 DE08 258 1887 1918 303.9 0.7 DE08 259 1887 1918 304.1 0.7 DE08 233 1885 1916 301.9 0.6 DE08 333 1884 1915 301.1 2.1 DE08 358 1884 1915 300.4 2.7 DE08 239 1882 1913 301.3 0.6 DE08 394 1880 1911 298.3 4.8 DE08 392 1880 1911 296.7 3.2 DE08 267 1880 1911 298.0 2.5 DE08 429 1879 1910 297.7 1.2 DE08 320 1878 1909 301.6 2.1 DSS0506 07 1847 1907 295.4 0.8 DE08 253 1875 1906 297.2 0.6 DSS 033 1846 1906 299.5 0.6 DE08 254 1875 1906 298.9 0.6 DE08 336 1873 1904 296.1 0.9 DE08 363 1871 1902 295.3 2.0 DE08 364 1871 1902 294.5 2.0 DSS 007 1842 1902 297.1 0.6 DE08 435 1869 1900 294.1 1.2 DE08 318 1868 1899 297.1 2.1 DE08 230 1868 1899 295.3 0.6 DE08 478 1866 1897 293.3 0.6 DE08 479 1866 1897 292.0 1.2 DE08 480 1866 1897 291.8 0.9 DE08 483 1866 1897 294.5 0.6 DE08 484 1866 1897 294.7 0.9 DSS0506 33 1837 1897 297.3 1.2 DE08 485 1866 1897 291.9 0.6 DSS0506 14 1834 1894 291.9 0.5 DE08 343 1863 1894 293.9 0.9 DE08 384 1863 1894 292.2 3.2 DE08 382a 1862 1893 293.9 3.2 DSS 030 1833 1893 295.3 0.6 DE08 241 1862 1893 295.2 0.6 DE08 427 1859 1890 290.8 1.2 DE08 334 1858 1889 292.5 0.9 DE08 335 1858 1889 292.4 0.4 DE08 252 1857 1888 294.3 0.6 DE08 470 1856 1887 289.9 0.5 DE08 469 1856 1887 290.4 0.5 DE08 471 1856 1887 291.1 0.5 DE08 370 1855 1886 288.2 2.0 DSS 172 1824 1884 289.4 0.6 DE08 344 1853 1884 289.9 0.9 DE08 229 1852 1883 292.5 0.9 DE08 425 1849 1880 287.6 1.2 DE08 255 1846 1877 289.2 0.6 DE08 330 1843 1874 291.6 2.1 DE08 362 1842 1873 286.7 1.3 DE08 436 1839 1870 286.2 1.2 DE08 228 1839 1870 288.0 0.6 DE08 379a 1838 1869 288.8 3.2 DE08 380a 1838 1869 288.2 3.2 DSS 171 1808 1868 288.1 0.4 DE08 367 1836 1867 284.8 1.3 DE08 368 1836 1867 285.5 2.7 DE08 447 1833 1864 286.5 1.2 DE08 346 1832 1863 285.5 0.9 DSS0506 32 1803 1863 283.0 0.7 DE08 232 1831 1862 287.2 0.6 DSS0506 19 1799 1859 284.9 0.5 DE08 347 1828 1859 286.8 0.4 DE08 421 1826 1857 283.0 1.2 DSS0506 17 1795 1855 283.3 0.5 DE08 234 1824 1855 285.6 0.6 DE08 328 1823 1854 288.1 2.1 DSS0506 18 1792 1852 284.0 0.5 DE08 200 1820 1851 285.5 0.9 DSS 170 1791 1851 288.9 0.4 DE08 446 1820 1851 283.9 1.2 DSS0506 31 1788 1848 283.6 0.5 DSS 009 1787 1847 286.8 0.6 DE08 365 1815 1846 282.9 2.0 DE08 366 1815 1846 284.5 2.0 DE08 433 1814 1845 283.0 1.2 DE08 414 1814 1845 283.4 1.2 DE08 441 1813 1844 282.0 1.2 DE08 442 1813 1844 280.8 1.2 DE08 466 1812 1843 282.7 0.5 DE08 467 1811 1842 282.8 0.5 DE08 222 1810 1841 283.6 0.6 DSS0506 16 1778 1838 282.6 0.5 DSS 151 1777 1837 284.3 0.9 DSS 140 1773 1833 284.0 0.9 DE08-2 006 1801 1833 285.1 0.9 DSS 010 1767 1827 285.9 0.6 DSS0506 23 1766 1826 281.8 0.5 DSS 139 1765 1825 281.5 0.9 DSS0506 09 1757 1817 280.9 0.5 DSS 152 1754 1814 284.6 0.9 DSS0506 20 1750 1810 281.1 0.5 DSS 015 1739 1799 284.4 0.6 DSS 142 1739 1799 281.4 0.9 DSS 189 1736 1796 279.4 3.2 DSS0506 21 1736 1796 279.3 0.5 DSS 016 1736 1796 282.3 0.6 DSS 153 1734 1794 281.8 0.9 DSS 182 1720 1780 273.2 0.4 DSS 017 1719 1779 280.2 0.6 DSS0506 24 1715 1775 277.7 0.5 DSS 154 1713 1773 278.0 0.9 DSS 155 1704 1764 276.5 0.9 DSS 031 1703 1763 277.2 0.9 DSS0506 25 1700 1760 276.6 0.5 DSS 014 1692 1752 278.0 0.6 DSS 156 1692 1752 276.6 0.9 DSS 025 1689 1749 277.6 0.6 DSS0506 22 1686 1746 275.4 0.5 DSS 138 1681 1741 276.9 0.9 DSS 157 1674 1734 278.4 0.9 DSS 144 1663 1723 277.1 0.9 DSS 019 1663 1723 278.3 0.9 DSS0506 27 1659 1719 276.4 0.5 DSS0506 34 1650 1710 276.3 0.6 DSS0506 28 1643 1703 275.0 0.5 DSS 011 1634 1694 277.4 0.6 DSS 159 1630 1690 276.5 0.9 DSS 020 1622 1682 276.7 0.6 DSS 013 1589 1649 278.0 0.6 DSS 160 1580 1640 276.8 0.9 DSS 183 1569 1629 273.9 0.4 DSS 184 1549 1609 271.2 0.4 DSS 012 1543 1603 275.1 0.6 DSS 021 1531 1591 279.4 0.6 DSS 146 1528 1588 281.2 0.9 DSS 032 1513 1573 282.5 0.6 DSS 162 1500 1560 282.0 0.9 DSS 018 1490 1550 283.5 1.3 DSS 035 1470 1530 283.8 0.6 DSS 023 1442 1502 283.1 0.6 DSS 044 1409 1469 280.2 1.3 DSS 022 1389 1449 282.4 0.9 DSS 174 1369 1429 279.9 0.4 DSS 165 1351 1411 279.8 0.9 DSS 024 1330 1390 280.7 0.6 DSS 026 1330 1390 281.1 0.6 DSS 185 1289 1349 278.5 0.4 DSS 034 1270 1330 284.0 0.9 DSS 148 1247 1307 281.7 0.9 DSS 186 1218 1278 278.6 0.4 DSS 167 1200 1260 282.3 0.9 DSS 039 1191 1251 282.3 0.6 DSS 168 1151 1211 283.8 0.9 DSS 036 1140 1200 284.4 0.9 DSS 137 1106 1166 284.1 1.4 DSS 043 1086 1146 284.4 1.3 DSS 169 1056 1116 283.0 0.9 DSS 042 1039 1099 283.0 0.6 DSS 149 1010 1070 283.0 0.9 DSS 040 989 1049 281.0 0.6 DSS 150 980 1040 281.0 0.9 DSS 038 959 1019 280.0 0.6 DSS 182a 958 1018 279.9 1.3 DSS 125 923 983 278.9 1.4 DSS 187 898 958 277.5 0.4 DSS 109 854 914 280.2 2.1 DSS 126 815 875 279.6 1.4 DSS 128 762 822 278.8 1.4 DSS 110 733 793 279.8 3.2 DSS 111 702 762 279.3 2.1 DSS 112 670 730 280.1 0.4 DSS 113 641 701 277.2 0.4 DSS 114 609 669 278.6 0.4 DSS 115 577 637 279.7 0.4 DSS 117 555 615 278.0 0.4 DSS 116 522 582 276.3 0.4 DSS 080 497 557 278.5 3.8 DSS 118 492 552 276.7 0.4 DSS 119 458 518 276.9 1.4 DSS 120 428 488 277.2 0.4 DSS 121 377 437 280.1 0.4 DSS 122 346 406 279.3 0.4 DSS 123 324 384 277.4 0.4 DSS 124 297 357 277.9 0.4 DSS 129 258 318 281.8 0.4 DSS 130 236 296 281.0 0.4 DSS 082 214 274 280.2 2.5 DSS 131 206 266 278.4 0.6 DSS 132 181 241 280.4 0.6 DSS 134 115 175 277.7 0.4 DSS 135 94 154 278.2 0.4