------------------------------------------------------------------------------- d13C(CH4) data of the clean air monitoring station Izaņa ------------------------------------------------------------------------------- Institut für Umweltphysik (IUP) University of Heidelberg, Germany ------------------------------------------------------------------------------- LAST UPDATE: 05/2017 CONTRIBUTORS: C.Veidt, C.Poß, and I. Levin ------------------------------------------------------------------------------- SAMPLING LOCATION: Izaņa, Tenerife, Spain 28.30°N 16.48°W 2367m 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: start of sampling (Izaņa: integrated sampling) Column 2: end of sampling in decimal year Column 3: Izaņa CH4 mole fraction in ppb Column 4: individual error in ppb (1 sigma standard deviation + error propagation) Column 3: Izaņa d13C(CH4) data in permil versus V-PDB Column 4: individual error in permil point (1 sigma standard deviation + error propagation) -------------------------------------------------------------------------- start stop CH4 1sig d13CH4 1sig 1991.729 1991.767 1770.3 5.0 -47.65 0.15 1991.844 1991.882 1771.3 5.0 -47.72 0.15 1991.997 1992.036 1784.2 5.0 -47.74 0.15 1992.074 1992.112 1797.1 5.0 -47.66 0.15 1992.112 1992.151 1778.2 5.0 -47.57 0.15 1992.266 1992.307 1774.3 5.0 -47.38 0.15 1992.457 1992.496 1775.3 5.0 -47.26 0.15 1992.611 1992.649 1754.4 5.0 -47.31 0.15 1992.687 1992.726 1761.4 5.0 -47.39 0.15 1992.764 1992.802 1759.4 5.0 -47.70 0.15 1992.841 1992.879 1770.3 5.0 -47.58 0.15 1992.917 1992.956 1764.3 5.0 -47.59 0.15 1992.994 1993.032 1754.9 5.0 -47.82 0.15 1993.070 1993.109 1755.4 5.0 -47.74 0.15 1993.109 1993.147 1767.3 5.0 -47.64 0.15 1993.147 1993.185 1766.3 5.0 -47.70 0.15 1993.224 1993.262 1770.3 5.0 -47.54 0.20 1993.300 1993.339 1787.2 5.0 -47.50 0.15 1993.415 1993.454 1781.2 5.0 -47.53 0.15 1993.454 1993.492 1762.4 5.0 -47.56 0.15 1993.492 1993.530 1781.2 5.0 -47.54 0.15 1993.530 1993.569 1744.7 1.6 -47.44 0.04 1993.645 1993.684 1768.3 5.0 -47.45 0.10 1993.725 1993.763 1772.3 5.0 -47.57 0.10 1993.799 1993.837 1782.6 1.4 -47.66 0.03 1993.837 1993.878 1795.1 5.0 -47.70 0.10 1993.914 1993.952 1779.2 5.0 -47.60 0.15 1994.073 1994.105 1779.2 5.0 -47.56 0.10 1994.220 1994.259 1767.1 1.3 -47.49 0.10 1994.272 1994.335 1785.8 2.5 -47.58 0.10 1994.335 1994.374 1780.7 1.2 -47.44 0.10 1994.450 1994.489 1768.8 1.6 -47.42 0.10 1994.489 1994.527 1756.4 5.0 -47.39 0.10 1994.604 1994.642 1758.6 2.0 -47.51 0.10 1994.642 1994.680 1768.6 1.6 -47.55 0.10 1994.834 1994.872 1781.0 2.5 -47.56 0.10 1994.910 1994.951 1783.3 1.2 -47.71 0.10 1994.951 1994.987 1776.6 1.1 -47.55 0.10 1994.987 1995.025 1776.5 1.8 -47.51 0.10 1995.146 1995.176 1777.3 2.1 -47.45 0.10 1995.217 1995.255 1791.1 2.6 -47.44 0.10 1995.255 1995.294 1772.7 2.2 -47.31 0.10 1995.332 1995.370 1776.2 1.5 -47.33 0.10 1995.409 1995.447 1773.4 3.0 -47.39 0.10 1995.485 1995.524 1781.7 2.2 -47.43 0.10 1995.524 1995.562 1768.2 1.5 -47.37 0.10 1995.562 1995.600 1763.7 1.6 -47.48 0.10 1995.680 1995.718 1773.3 2.2 -47.63 0.10 1995.718 1995.756 1787.8 0.8 -47.63 0.10 1995.830 1995.869 1790.2 1.7 -47.66 0.10 1995.907 1995.945 1806.6 1.2 -47.83 0.10 1996.060 1996.101 1806.3 1.9 -47.58 0.10 1996.101 1996.137 1793.1 1.2 -47.51 0.01 1996.137 1996.175 1801.3 4.5 -47.68 0.10 1996.214 1996.249 1789.1 0.6 -47.57 0.10 1996.252 1996.290 1783.7 1.4 -47.43 0.02 1996.405 1996.444 1772.8 1.4 -47.36 0.10 1996.482 1996.501 1771.9 1.8 -47.39 0.10 1996.559 1996.597 1771.1 2.4 -47.51 0.10 1996.635 1996.674 1774.9 2.5 -47.57 0.10 1996.712 1996.753 1775.3 2.4 -47.57 0.10 1996.789 1996.827 1793.0 2.9 -47.52 0.10 1996.827 1996.865 1797.2 1.2 -47.70 0.02 1996.865 1996.903 1804.1 1.2 -47.68 0.06 1996.903 1996.942 1786.1 1.1 -47.58 0.10 1996.942 1996.977 1789.7 1.9 -47.50 0.06 1997.018 1997.057 1789.2 2.9 -47.47 0.07 1997.095 1997.133 1795.6 2.2 -47.58 0.07 1997.172 1997.210 1795.8 3.0 -47.52 0.10 1997.325 1997.363 1804.0 2.8 -47.40 0.10 1997.443 1997.478 1782.4 0.5 -47.31 0.07 1997.478 1997.517 1790.5 3.0 -47.19 0.10 1997.517 1997.555 1799.2 2.0 -47.46 0.10 1997.593 1997.632 1768.1 1.5 -47.43 0.02 1997.670 1997.708 1764.2 0.1 -47.39 0.02 1997.708 1997.747 1781.4 1.9 -47.62 0.03 1997.823 1997.862 1783.1 1.9 -47.58 0.02 1997.862 1997.900 1797.6 2.7 -47.79 0.10 1997.900 1997.938 1797.5 1.3 -47.47 0.02 1997.938 1997.974 1801.2 2.8 -47.67 0.07 1997.974 1998.012 1801.1 1.6 -47.52 0.02 1998.015 1998.053 1796.6 2.4 -47.40 0.10 1998.053 1998.092 1792.3 1.5 -47.50 0.02 1998.398 1998.475 1791.1 2.6 -47.37 0.10 1998.478 1998.552 1788.5 1.6 -47.34 0.02 1998.667 1998.741 1791.3 1.9 -47.47 0.02 1998.820 1998.897 1804.8 1.7 -47.47 0.02 1998.973 1999.077 1815.8 1.4 -47.50 0.02 -------------------------------------------------------------------------