---------------------------------------------------------------------------------------- d13C(CH4) data of the clean air monitoring station Neumayer ---------------------------------------------------------------------------------------- Institut für Umweltphysik (IUP) University of Heidelberg, Germany ---------------------------------------------------------------------------------------- LAST UPDATE: 05/2017 CONTRIBUTORS: C.Veidt, C.Poß, and I. Levin ---------------------------------------------------------------------------------------- SAMPLING LOCATION: Neumayer station, Dronning Maud Land, Antarctica 70.65°S 8.25°W 42m a.s.l. ---------------------------------------------------------------------------------------- REFERENCES: C. Veidt PhD thesis in preparation Levin I., C. Veidt, B. H. Vaughn, G. Brailsford, T. Bromley, R.Heinz, D. Lowe, J. B. Miller, C. Poß, and J. W. C. White No inter-hemispheric d13CH4 trend observedNature, Vol.486, 28.6.2012, pages E3-E4, doi:10.1038/nature11175 NOTE: PLEASE CITE THE LATTER REFERENCE WHEN USING THIS DATA ---------------------------------------------------------------------------------------- 13C/12C ratios of CO2 derived from catalytical combustion of the extracted CH4 samples were measured with a dual inlet mass spectrometer (MAT 252, Finnigan). Hence d13C(CH4) results are NOT affected by the Kr-effect described in J. Schmitt et al., AMT 2013, DOI: 10.5194/amt-6-1425-2013. ---------------------------------------------------------------------------------------- SCALE: mole fraction on NOAA04 scale d13C is reported as deviation from the standard VPDB in permil d13C(CH4) values are reported on UHEI scale ---------------------------------------------------------------------------------------- Column 1: date of sampling in decimal year (Neumayer: spot samples) Column 2: Neumayer CH4 mole fraction in ppb Column 3: individual error in ppb (1 sigma standard deviation + error+A50 propagation) Column 4: Neumayer d13C(CH4) data in permil versus V-PDB Column 5: individual error in permil point (1 sigma standard deviation + error propagation) ---------------------------------------------------------------------------------------- sampling date CH4 1sig d13(CH4) 1sig 1988.487 1636.9 5.0 -47.68 0.02 1988.507 1646.4 5.0 -47.55 0.10 1988.564 1647.9 5.0 -47.54 0.02 1988.583 1651.0 1.8 -47.62 0.07 1988.613 1657.9 5.2 -47.47 0.07 1988.972 1661.3 5.0 -47.43 0.10 1989.142 1642.9 2.0 -47.48 0.07 1989.476 1653.3 5.0 -47.64 0.02 1989.517 1660.5 5.0 -47.66 0.02 1990.040 1653.9 1.7 -47.50 0.05 1990.155 1644.3 5.0 -47.59 0.10 1990.248 1645.4 3.3 -47.48 0.07 1990.286 1650.9 2.0 -47.47 0.10 1990.497 1667.4 2.4 -47.49 0.02 1990.516 1669.8 2.0 -47.55 0.10 1990.535 1672.1 5.0 -47.63 0.02 1990.554 1672.4 5.0 -47.55 0.10 1990.710 1674.8 3.0 -47.54 0.10 1990.752 1674.1 5.0 -47.54 0.10 1990.899 1670.9 1.8 -47.51 0.06 1990.957 1672.1 5.0 -47.44 0.07 1990.971 1673.1 5.0 -47.53 0.10 1991.072 1655.1 5.0 -47.37 0.10 1991.129 1659.2 5.0 -47.36 0.07 1991.212 1651.3 5.0 -47.40 0.10 1991.264 1655.8 5.0 -47.43 0.07 1991.359 1658.2 5.0 -47.44 0.07 1991.494 1674.8 1.7 -47.63 0.02 1991.532 1674.1 5.0 -47.57 0.10 1991.595 1684.0 1.2 -47.59 0.02 1991.688 1684.0 5.0 -47.53 0.10 1991.759 1692.0 5.0 -47.57 0.10 1991.784 1693.9 5.0 -47.59 0.10 1991.923 1687.0 5.0 -47.42 0.10 1992.090 1672.7 1.9 -47.37 0.01 1992.175 1674.3 1.7 -47.29 0.07 1992.361 1685.4 2.1 -47.43 0.02 1992.389 1687.0 5.0 -47.40 0.10 1992.413 1684.6 1.4 -47.44 0.10 1992.463 1688.1 2.1 -47.37 0.01 1992.616 1701.9 5.0 -47.51 0.09 1992.638 1702.9 5.0 -47.61 0.10 1992.734 1709.8 5.0 -47.59 0.10 1992.832 1697.7 2.2 -47.41 0.10 1992.865 1694.9 5.0 -47.42 0.10 1992.887 1694.9 5.0 -47.35 0.10 1992.956 1687.9 2.5 -47.44 0.10 1992.988 n.m. n.m. -47.41 0.07 1993.133 1667.2 5.0 -47.29 0.10 1993.199 1672.1 5.0 -47.29 0.07 1993.265 1674.1 5.0 -47.41 0.07 1993.446 1691.0 5.0 -47.38 0.02 1993.506 1694.1 1.7 -47.56 0.09 1993.582 1698.8 2.5 -47.60 0.09 1993.626 1707.8 5.0 -47.49 0.07 1993.697 1703.0 2.2 -47.45 0.10 1993.741 1702.7 5.0 -47.42 0.10 1993.826 1691.9 5.0 -47.51 0.07 1993.886 1695.1 2.1 -47.37 0.06 1994.001 1681.0 5.0 -47.38 0.07 1994.051 1681.2 5.0 -47.42 0.10 1994.125 1674.6 1.3 -47.25 0.10 1994.146 1676.5 1.0 -47.30 0.07 1994.204 1676.5 5.0 -47.26 0.10 1994.231 1675.6 1.2 -47.28 0.09 1994.253 1675.3 2.2 -47.30 0.10 1994.355 1684.3 1.1 -47.36 0.04 1994.374 1685.1 2.1 -47.39 0.10 1994.398 1686.9 1.1 -47.38 0.09 1994.431 1691.1 2.6 -47.40 0.10 1994.453 1693.1 1.0 -47.39 0.02 1994.497 1696.8 1.9 -47.49 0.10 1994.519 1696.9 1.7 -47.47 0.02 1994.541 1695.2 1.8 -47.55 0.10 1994.568 1698.3 1.0 -47.49 0.10 1994.590 1702.3 1.3 -47.48 0.10 1994.617 1702.6 1.1 -47.45 0.03 1994.645 1702.7 1.2 -47.42 0.10 1994.689 1705.4 3.2 -47.46 0.10 1994.782 1707.6 2.2 -47.33 0.10 1994.839 1699.1 1.3 -47.48 0.02 1994.877 1705.5 0.9 -47.43 0.10 1994.905 1701.2 2.4 -47.46 0.10 1994.921 1699.6 1.6 -47.34 0.10 1994.960 1699.1 1.7 -47.42 0.10 1995.091 1688.4 1.4 -47.36 0.03 1995.132 1688.0 1.5 -47.25 0.10 1995.179 1678.9 4.4 -47.22 0.07 1995.206 1687.2 1.3 -47.31 0.10 1995.244 1686.8 1.3 -47.16 0.04 1995.283 1688.3 1.8 -47.24 0.07 1995.398 1697.6 2.0 -47.29 0.10 1995.436 1700.2 2.5 -47.31 0.10 1995.472 1700.9 3.0 -47.19 0.10 1995.592 1713.4 2.1 -47.35 0.07 1995.663 1713.4 2.2 -47.31 0.10 1995.704 1716.4 1.4 -47.40 0.04 1995.781 1715.6 1.4 -47.33 0.07 1995.975 1703.4 1.4 -47.25 0.10 1996.052 1695.1 1.8 -47.27 0.10 1996.120 1687.3 2.6 -47.27 0.02 1996.159 1687.4 2.6 -47.23 0.07 1996.222 1686.8 3.0 -47.15 0.07 1996.246 1690.7 0.9 -47.24 0.03 1996.274 1687.8 2.4 -47.30 0.10 1996.334 1693.0 3.2 -47.25 0.07 1996.361 1695.7 1.3 -47.29 0.03 1996.389 1697.5 2.3 -47.29 0.07 1996.427 1701.1 1.3 -47.31 0.15 1996.446 1703.5 1.9 -47.38 0.07 1996.471 1704.6 1.4 -47.25 0.06 1996.507 1706.3 1.5 -47.34 0.06 1996.567 1711.8 1.8 -47.40 0.07 1996.613 1711.5 1.6 -47.38 0.02 1996.695 1712.1 2.5 -47.52 0.07 1996.810 1715.9 3.1 -47.42 0.07 1996.873 1712.7 2.5 -47.36 0.06 1996.893 1709.8 1.5 -47.37 0.07 1996.928 1705.8 2.9 -47.32 0.07 1996.986 1698.6 1.8 -47.21 0.07 1997.010 1697.3 1.6 -47.33 0.15 1997.043 1696.9 3.1 -47.23 0.07 1997.123 1690.9 3.3 -47.28 0.10 1997.155 1690.8 1.9 -47.27 0.18 1997.169 1689.3 2.0 -47.19 0.10 1997.227 1693.4 2.0 -47.22 0.18 1997.262 1697.4 1.4 -47.18 0.05 1997.344 1702.4 2.7 -47.41 0.09 1997.440 1708.6 2.0 -47.37 0.09 1997.552 1717.1 1.9 -47.57 0.09 1997.662 1723.2 1.9 -47.50 0.09 1997.703 1722.7 1.0 -47.40 0.06 1997.777 1722.5 2.4 -47.50 0.07 1997.900 1715.5 2.0 -47.09 0.09 1997.936 1711.9 1.2 -47.19 0.04 1997.963 1711.2 2.4 -47.20 0.19 1998.045 1704.7 2.0 -47.06 0.09 1998.259 1701.7 1.8 -47.27 0.07 1998.327 1702.8 3.2 -47.15 0.12 1998.415 1713.7 1.8 -47.34 0.09 1998.667 1730.2 2.1 -47.21 0.12 1998.801 1731.3 1.6 -47.28 0.02 1998.905 1724.3 1.6 -47.29 0.09 1998.968 1718.0 2.3 -47.15 0.11 1999.077 1711.9 3.4 -47.23 0.02 1999.135 1708.4 1.7 -47.19 0.09 1999.209 1708.5 2.0 -47.04 0.13 1999.362 1720.9 2.6 -47.14 0.08 1999.535 1732.2 2.4 -47.14 0.12 1999.671 1744.4 2.2 -47.24 0.08 1999.748 1740.7 1.7 -47.25 0.09 1999.828 1737.0 2.2 -47.20 0.12 1999.995 1724.1 2.4 -47.30 0.02 2000.063 1715.0 1.5 -47.25 0.07 2000.129 1711.9 2.0 -46.99 0.18 2000.397 1721.2 2.2 -47.10 0.11 2000.512 1731.2 1.3 -47.27 0.12 2000.715 1743.6 2.0 -47.27 0.13 2000.745 1741.1 2.1 -47.29 0.09 2000.857 1737.4 1.7 -47.34 0.09 2001.087 1713.5 1.8 -47.09 0.15 2001.314 1715.1 1.4 -47.21 0.09 2001.399 1719.7 1.4 -47.27 0.06 2001.509 1731.6 1.4 -47.32 0.09 2001.585 1737.6 1.1 -47.34 0.04 2001.662 1740.4 1.7 -47.32 0.09 2001.739 1741.1 1.2 -47.25 0.01 2001.815 1737.7 1.6 -47.33 0.09 2001.892 1732.2 1.4 -47.24 0.01 2001.969 1723.9 1.7 -47.24 0.03 2002.084 1713.3 1.7 -47.23 0.09 2002.160 1711.1 1.7 -47.25 0.09 2002.275 1714.6 1.5 -47.18 0.09 2002.428 1729.0 1.7 -47.30 0.09 2002.505 1733.4 1.3 -47.30 0.01 2002.582 1740.3 1.5 -47.37 0.09 2002.735 1744.1 1.6 -47.33 0.09 2002.812 1742.0 1.4 -47.31 0.01 2002.888 1737.6 1.8 -47.29 0.09 2002.965 1730.3 1.7 -47.31 0.02 2003.061 1718.1 1.7 -47.29 0.09 2003.110 1713.9 1.5 -47.32 0.06 2003.222 1716.6 2.3 -47.28 0.09 2003.332 1721.4 1.4 -47.30 0.02 2003.444 1736.7 1.5 -47.36 0.03 2003.606 1751.0 1.4 -47.42 0.03 2003.661 1747.8 1.5 -47.41 0.03 2003.784 1745.9 1.3 -47.44 0.01 2003.934 1743.1 1.5 -47.40 0.02 2003.989 1728.2 1.3 -47.30 0.02 2004.099 1724.6 2.2 -47.20 0.03 2004.211 1713.9 1.5 -47.14 0.02 2004.323 1727.3 1.3 -47.25 0.01 2004.542 1737.1 1.5 -47.32 0.01 2004.649 1747.1 1.6 -47.40 0.01 2004.758 1753.5 1.4 -47.46 0.02 2004.871 1742.6 1.3 -47.35 0.01 2004.977 1727.5 1.3 -47.27 0.02 2005.087 1715.3 2.5 -47.17 0.02 2005.196 1711.8 2.8 -47.12 0.01 2005.306 1715.8 2.1 -47.13 0.02 2005.418 1723.0 2.4 -47.13 0.01 2005.525 1735.4 2.4 -47.28 0.02 2005.637 1741.3 2.4 -47.25 0.01 2005.744 1741.3 2.7 -47.19 0.02 2005.854 1739.0 2.2 -47.10 0.01 2005.963 1729.9 2.6 -47.12 0.02 2006.073 1714.2 2.1 -47.08 0.06 2006.182 1708.6 1.8 -47.03 0.07 2006.401 1725.6 2.0 -46.99 0.06 2006.511 1731.7 2.1 -47.06 0.01 2006.839 1738.2 2.1 -47.23 0.06 2006.949 1723.8 2.3 -47.26 0.06 2007.058 1715.1 3.9 -47.21 0.02 2007.277 1716.4 4.1 -47.13 0.03 2007.496 1733.6 3.3 -47.16 0.04 2007.825 1741.9 3.9 -47.36 0.07 2007.934 1735.5 3.3 -47.20 0.04 2008.049 1722.8 3.3 -47.17 0.07 2008.181 1722.8 2.2 -47.18 0.05 2008.298 1729.5 1.8 -47.05 0.10 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