********************************************************************** *** Measurements of CH4 mixing ratio and D/H and *** *** 13C/12C isotope ratios in atmospheric samples *** *** from Montana de Oro, CA, USA *** *** *** *** Jan. 23, 1996 to Dec. 01, 2001 *** *** *** *** Source: S.C. Tyler *** *** Department of Earth System Science *** *** University of California *** *** Irvine, CA 92697 *** *** *** *** *** *** May 2003 *** *** *** ********************************************************************** Error in measurement is 1 standard deviation from the mean of multiple samples Date Time conc. CH4 d13CH4 d13CH4 dD-CH4 dD-CH4 wind wind wind (local err. conc. err. spd. spd. dir. time) (ppb) (ppb) (per (per (per s.d. (mph) (km/hr) (degrees) mil) mil) mil) (1s) 1/23/1996 4:45 PM 6 1822 -47.37 0.04 NM NM 7 11.3 290 2/23/1996 3:50 PM 3 1833 -47.56 0 NM NM 16 25.7 310 3/23/1996 5:12 PM 0 1805 -47.22 0 NM NM 20 32.2 310 5/24/1996 7:42 PM 3 1805 -47.63 0.03 NM NM 4 6.4 310 6/20/1996 5:20 PM 5 1804 -47.25 0.01 NM NM 13 20.9 295 7/18/1996 4:31 PM 1 1785 -47.31 0.06 NM NM 5 8 320 8/29/1996 5:00 PM 4 1749 -47.23 0.06 NM NM 9 14.5 320 9/17/1996 5:15 PM 4 1812 -47.64 0.06 NM NM 5 8 290 10/31/1996 2:55 PM 5 1848 -47.5 0.04 NM NM 4 6.4 290 11/14/1996 4:28 PM 4 1804 -47.44 0.07 NM NM 22.5 36.2 285 12/1/1996 3:34 PM 4 1791 -47.5 0 NM NM 18 29 280 12/21/1996 4:48 PM 9 1805 -47.38 0.09 NM NM 11 17.7 140 1/28/1997 11:36AM 2 1839 -47.18 0.14 NM NM 12 19.3 300 2/13/1997 1:32 PM 4 1822 -47.35 0.11 NM NM 14 22.5 300 2/28/1997 3:34 PM 1 1806 -47.31 0.06 NM NM 10 16.1 280 3/25/1997 2:16 PM 7 1842 -47.37 0.08 NM NM 3 4.8 280 4/9/1997 3:53 PM 4 1826 -47.48 0.23 NM NM 19 30.6 290 4/25/1997 3:03 PM 6 1820 -47.21 0.08 NM NM 5 8 280 5/8/1997 5:43 PM 11 1810 -47.36 0.02 NM NM 6 9.7 310 5/29/1997 5:33 PM 8 1753 -47 0.06 NM NM 5 8 300 6/25/1997 6:12 PM 3 1780 -47.28 0.03 NM NM 4 6.4 250 7/10/1997 6:34 PM 11 1787 -47.28 0.02 NM NM 6 9.7 280 8/13/1997 6:24 PM 7 1761 -47.24 0.11 NM NM 7 11.3 290 8/27/1997 6:39 PM 18 1794 -47.53 0.03 NM NM 4 6.4 280 9/10/1997 5:47 PM 64 1826.5 -47.57 0.01 NM NM 4 6.4 305 10/3/1997 6:27 PM 7 1818 -47.63 0.06 NM NM 5 8 320 10/22/1997 5:18 PM 15 1797.5 -47.43 0.01 NM NM 13 20.9 280 11/12/1997 5:55 PM 9 1783.5 -47.54 0.04 NM NM 10 16.1 290 12/11/1997 4:10 PM 1 1823 -47.38 0.07 NM NM 3 4.8 NM 12/23/1997 5:55 PM 8 1823 -47.4 0.01 NM NM 4 6.4 360 1/16/1998 5:34 PM 4 1791 -47.21 0.04 NM NM 13 20.9 275 2/9/1998 4:29 PM 5 1812 -47.19 0.11 NM NM 11 17.7 290 2/27/1998 6:22 PM 0 1814 -47.17 0.08 NM NM NM NM 300 4/5/1998 6:58 PM 1 1811 -47.21 0.04 NM NM 11 17.7 290 5/9/1998 5:48 PM 4 1814 -47.21 0.02 NM NM 19 30.6 280 6/10/1998 4:53 PM 5 1758 -46.95 0.11 NM NM 0 0 NM 7/2/1998 5:48 PM 2 1774 -47.09 0 NM NM 10 16.1 125 7/16/1998 7:07 PM 3 1747 -47.03 0.03 NM NM 4 6.4 290 8/1/1998 5:37 PM 4 1795.6 -47.08 0.04 NM NM 8 12.9 330 8/23/1998 6:24 PM 6.15 1814.1 -47.19 0.06 NM NM 6 9.7 330 9/26/1998 6:55 PM 9.69 1825.5 -47.32 0.02 NM NM 4 6.4 120 10/25/1998 3:05 PM 2.97 1828.3 -47.4 0.01 NM NM 8 12.9 300 11/19/1998 4:28 PM 0.28 1822.5 -47.22 0.07 NM NM 6 9.7 360 12/13/1998 4:56 PM 0.4 1791.1 -47.26 0 NM NM 2 3.2 276 12/28/1998 5:35 PM 2.4 1873.5 -47.11 0.03 NM NM 3 4.8 20 1/31/1999 2:17 PM 1 1839 -47.27 0.05 NM NM 18 29 280 4/18/1999 4:45 PM 3 1833 -47.11 0.02 NM NM 6 9.7 320 4/30/1999 4:52 PM 1 1831 -47.16 0 NM NM 6 9.7 270 6/23/1999 4:20 PM 5 1806 -47.06 0 NM NM 5 8 296 7/12/1999 6:17 PM 0 1770 -47.19 0 NM NM 7 11.3 310 7/25/1999 5:25 AM 5 1756 -47.16 0.03 NM NM 9 14.5 300 8/5/1999 4:58 AM 0 1778 -47.2 0 NM NM 0 0 360 8/22/1999 4:23 PM 4 1793 -47.36 0.01 NM NM 5 8 180 9/30/1999 4:45 PM 1 1815 -47.24 0 NM NM 9 14.5 340 11/1/1999 2:04 PM 2 1898 -47.36 0 NM NM 2 3.2 340 11/3/1999 2:54 PM 4 1836 -47.22 0.03 NM NM 14 22.5 340 11/22/1999 1:52 PM 1 1846 -47.39 0.01 NM NM 8 12.9 340 12/12/1999 2:51 PM 11 1835 -47.31 0.02 NM NM 2 3.2 345 12/30/1999 5:10 PM 5 1867 -47.22 0.01 NM NM 7.5 12.9 300 2/25/2000 5:05 PM 2 1842 -46.96 0 -104.2 1.7 7 11.3 310 3/13/2000 4:10 PM 4 1827 -47.18 0 -98.3 2.3 7 11.3 330 4/5/2000 4:05 PM 1 1784 -47.02 0.02 -98.2 1.2 10 16.1 310 4/19/2000 4:39 PM 8 1846 -47.15 0.01 -103.7 1.5 5 8 317 5/5/2000 3:42 AM 18 1854 -47.16 0.04 -95.4 0.9 6 9.7 317 5/19/2000 4:15 PM 0 1807 -47.12 0 -95.6 1.1 6 9.7 297 6/6/2000 5:19 PM 0 1793 -47.16 0 -98.1 0.4 5 8 297 6/27/2000 5:07 PM 0 1812 -46.92 0.11 -90.9 1.5 8 12.9 297 7/28/2000 4:26 PM 10 1758 -47.15 0.02 -95.4 1.9 6 9.7 335 8/21/2000 3:13 PM 0 1783 -47.31 0 -96.5 1.9 3 4.8 277 9/22/2000 3:50 PM 13 1788 -47.32 0 -96.1 1 8 12.9 177 10/18/2000 3:58 PM 0 1881 -47.39 0.03 -100.4 1.7 8 12.9 336 11/1/2000 5:02 PM 1 1835 -47.31 0.01 -102.4 1.7 9 14.5 300 11/17/2000 4:53 PM 6 1849 -47.4 0.03 -100.3 1.2 10 16.1 300 12/15/2000 3:53 PM 3 1814 -47.18 0.04 -98.7 0.6 11 17.7 320 1/17/2001 3:21 PM 6 1863 NM NM -103.9 2.1 19 30.4 280 2/5/2001 4:56 PM 5 1826 NM NM -98.8 1.6 5 8 300 2/22/2001 3:14 PM 8 1818 NM NM -100.1 1.5 13 20.8 270 4/4/2001 3:06 PM 3 1803 NM NM -94.5 1.9 10 16 270 4/25/2001 3:05 PM 11 1825 NM NM -97.1 0.1 8 12.8 290 5/9/2001 3:21 PM 0 1816 NM NM -94.8 0.1 8 12.8 300 6/1/2001 5:02 PM 2 1819 NM NM -94.4 1.5 3 4.8 290 6/23/2001 4:23 PM 3 1774 NM NM -91.2 0.6 2 3.2 290 7/13/2001 4:10 PM 4 1798 NM NM -94.7 0.3 14 22.4 295 8/4/2001 7:45 PM 5 1765 NM NM -91.7 0.4 9 14.4 320 9/8/2001 4:24 PM 34 1828 NM NM -98.5 1.5 6 9.6 300 9/22/2001 4:41 PM 1 1805 NM NM -94.9 0.8 4 6.4 270 10/19/2001 3:25 PM 12 1830 NM NM -96.6 1.7 6 9.6 300 12/1/2001 3:45 PM 5 1808 NM NM -93.6 0.3 11 17.6 150 NM -- not measured