******************************************************************* *** Cape Kumukahi, Hawaii isotopic ratio of atmospheric *** *** 13C/12C (permil) averages of data adjusted to the *** *** 15th of each month *** *** Source: C.D. Keeling, A.F. Bollenbacher, and T.P. Whorf *** *** Carbon Dioxide Research Group *** *** Scripps Institution of Oceanography (SIO) *** *** University of California *** *** La Jolla, California USA 92093-0444 *** *** *** *** March 2005 *** *** *** ******************************************************************* Year Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Ave FitAve 1980 99.999 -7.653 -7.758 -7.765 -7.812 -7.809 -7.592 -7.498 -7.370 -7.456 -7.699 -7.539 99.999 99.999 1981 -7.661 -7.660 -7.794 -7.708 99.999 99.999 -7.466 -7.324 -7.455 -7.473 -7.556 99.999 99.999 -7.613 1982 99.999 -7.704 -7.808 -7.729 -7.836 -7.722 -7.571 -7.456 99.999 -7.488 -7.592 -7.593 (-7.629) -7.625 1983 -7.664 -7.686 -7.707 -7.783 -7.886 -7.799 -7.636 -7.502 -7.469 -7.600 -7.564 -7.673 -7.664 -7.675 1984 -7.773 -7.869 -7.790 99.999 -7.963 -7.894 -7.651 -7.470 -7.421 -7.475 -7.611 -7.680 (-7.706) -7.703 1985 -7.762 -7.751 -7.807 -7.808 -7.859 -7.916 -7.677 -7.517 -7.462 -7.611 -7.620 -7.668 -7.705 -7.695 1986 -7.717 -7.807 -7.797 -7.892 -7.875 -7.830 -7.640 -7.524 -7.472 -7.594 -7.682 -7.721 -7.713 -7.708 1987 -7.795 -7.766 -7.869 -7.832 -7.888 -7.926 -7.731 -7.609 -7.501 -7.685 -7.766 -7.873 -7.770 -7.769 1988 -7.772 -7.904 -7.951 -7.979 -8.049 -7.960 -7.814 -7.729 -7.588 -7.717 -7.864 -7.808 -7.845 -7.850 1989 -7.900 -7.943 -7.936 -8.017 -8.039 -8.039 -7.815 -7.623 -7.683 -7.702 -7.797 -7.850 -7.862 -7.867 1990 -7.886 -7.909 -8.043 -8.036 -8.096 -8.052 -7.922 -7.771 -7.736 -7.767 -7.799 -7.837 -7.904 -7.892 1991 -7.915 -7.930 -7.988 -8.030 -8.098 -7.921 -7.806 -7.739 -7.607 -7.688 -7.791 -7.885 -7.867 -7.874 1992 -7.904 -7.986 -8.017 -8.061 -8.087 -8.013 -7.775 -7.734 -7.665 -7.722 -7.804 -7.869 -7.886 -7.885 1993 -7.928 -7.986 -7.957 -8.019 -8.093 -7.986 -7.799 -7.664 -7.603 -7.703 -7.814 -7.920 -7.873 -7.878 1994 -7.954 -7.960 -8.083 -8.062 -8.131 -8.002 -7.798 -7.742 -7.689 -7.750 -7.910 -7.964 -7.920 -7.913 1995 -7.973 -8.020 -7.996 -8.118 -8.122 -8.050 -7.853 -7.746 -7.737 -7.833 -7.853 -7.866 -7.930 -7.941 1996 -7.974 -8.063 -8.074 -8.143 -8.118 -8.122 -7.933 -7.839 -7.776 -7.799 -7.953 -8.044 -7.986 -7.978 1997 -7.986 -8.098 -8.087 -8.128 -8.238 -8.140 -7.910 -7.840 -7.740 -7.806 -7.959 -8.026 -7.997 -8.012 1998 -8.072 -8.194 -8.252 -8.256 -8.250 -8.151 -8.028 -7.915 -7.755 -7.982 -8.026 -8.117 -8.083 -8.086 1999 -8.189 -8.223 -8.252 -8.290 -8.279 -8.196 -8.016 -7.853 -7.767 -7.901 -7.958 -8.112 -8.086 -8.093 2000 -8.167 -8.170 -8.267 -8.296 -8.272 -8.234 -8.008 -7.916 -7.891 -7.914 -8.033 -8.064 -8.103 -8.098 2001 -8.146 -8.203 -8.301 -8.254 -8.296 -8.197 -8.029 -7.895 -7.864 -7.941 -8.046 -8.103 -8.106 -8.103 2002 -8.126 -8.241 -8.270 -8.301 -8.301 -8.187 -8.041 -7.929 -7.841 -7.963 -8.020 -8.192 -8.118 -8.122 Monthly averages have been adjusted to the 15th of each month. Missing values are denoted by 99.999. Annual average data have been augmented (data in parentheses) when only 1 or 2 months are missing for that year, by substituting the monthly fit value(s) for missing (99.999) data and then averaging the 12 values. The month without data is still shown as 99.999 while this recomputed annual average is shown in parentheses. These monthly data have been adjusted from January 1992 to the present by adding -0.112 per mil.