# # These data are freely available for use in education and research. If the data are used for scientific publication and/or presentation, it is necessary to get approval of the data provider in advance. Judging from the nature of the data usage, the data provider may require fair acknowledgement including co-authorship to the data user. # For technical reasons, the data may be revised without any notice. This data file must be obtained from the original data site and not be re-distributed. For more information, please contact with the data provider. # # CATEGORY: d18O instantaneous data (air sampling observation) # STATION NAME : Syowa Station, Antarctica # LOCATION: 69.00 S, 39.58 E # CONTRIBUTOR: National Institute of Polar Research and Tohoku University # CONTACT PERSON: Daisuke Goto (goto.daisuke@nipr.ac.jp) # PARAMETER: carbon isotope ratio of CO2 (d18O) # COVERING PERIOD: 1995-02-09 2021-01-26 # DATA FREQUENCY: event # MEASUREMENT UNIT: per mil # MEASUREMENT METHOD: Mass spectorometer # SAMPLING TYPE: flask # MEASUREMENT SCALE: Tohoku University scale # REMARKS: date are shown in local time (UTC+3) # VERSION: 20210319 # year month day delta O-18 (per mil) 1995 2 9 0.976 1995 2 10 0.954 1995 2 16 1.025 1995 2 17 0.833 1995 2 24 0.962 1995 2 25 1.137 1995 3 3 1.097 1995 3 10 1.008 1995 3 12 1.065 1995 3 18 1.007 1995 3 19 1.159 1995 3 25 1.138 1995 3 26 0.911 1995 4 2 1.204 1995 4 3 1.079 1995 4 12 0.966 1995 4 16 1.033 1995 4 18 1.072 1995 4 24 1.020 1995 4 28 1.180 1995 4 29 1.072 1995 5 9 1.144 1995 5 14 1.041 1995 5 16 0.871 1995 5 21 1.006 1995 5 27 1.113 1995 5 28 0.749 1995 6 3 1.113 1995 6 4 0.904 1995 6 11 0.977 1995 6 19 1.061 1995 6 24 0.761 1995 7 3 1.058 1995 7 9 0.981 1995 7 15 0.953 1995 7 20 1.000 1995 7 23 1.091 1995 7 30 0.663 1995 8 6 0.909 1995 8 14 0.909 1995 8 19 0.960 1995 8 25 0.713 1995 9 6 0.927 1995 9 12 0.975 1995 9 21 0.994 1995 9 26 0.904 1995 10 3 0.944 1995 10 5 1.124 1995 10 8 1.194 1995 10 16 1.065 1995 10 23 1.092 1995 10 25 1.290 1995 10 29 0.964 1995 11 11 1.068 1995 11 13 1.180 1995 11 16 0.969 1995 11 18 1.201 1995 11 26 0.956 1995 12 2 1.196 1995 12 4 1.038 1995 12 9 1.111 1995 12 11 1.245 1995 12 18 1.086 1995 12 21 1.227 1995 12 26 0.921 1995 12 31 1.138 1996 1 9 1.126 1996 1 13 1.113 1996 1 22 1.148 1996 1 28 0.986 1996 2 8 1.093 1996 2 19 1.085 1996 2 28 0.953 1996 3 29 0.971 1996 4 17 1.032 1996 4 18 1.026 1996 4 27 0.737 1996 5 13 0.775 1996 5 24 0.965 1996 5 30 0.774 1996 6 3 0.949 1996 6 14 0.790 1996 6 24 0.768 1996 7 3 0.903 1996 7 12 0.820 1996 7 19 0.858 1996 7 30 0.718 1996 8 12 0.799 1996 8 21 0.845 1996 9 1 0.664 1996 9 22 0.921 1996 9 30 0.781 1996 10 10 0.965 1996 10 22 0.924 1996 10 25 0.746 1996 11 5 0.970 1996 11 18 0.939 1996 11 22 0.808 1996 12 7 0.797 1996 12 14 0.730 1997 1 22 0.737 1997 4 29 0.654 1997 5 8 0.689 1997 5 15 0.666 1997 5 22 0.671 1997 6 1 0.799 1997 6 12 0.657 1997 7 5 0.717 1997 7 9 0.508 1997 7 14 0.605 1997 7 24 0.575 1997 7 29 0.596 1997 8 11 0.811 1997 8 15 0.691 1997 8 16 0.760 1997 8 25 0.690 1997 9 3 0.832 1997 9 10 0.719 1997 9 15 0.751 1997 9 23 0.739 1997 10 3 0.826 1997 10 14 0.728 1997 10 18 0.723 1997 10 19 0.798 1997 11 4 0.846 1997 11 10 0.962 1997 11 18 0.824 1997 11 27 0.766 1997 12 1 0.899 1997 12 9 0.886 1997 12 17 0.870 1997 12 23 0.839 1997 12 31 0.870 1998 1 11 0.875 1998 1 14 0.897 1998 1 20 0.899 1998 1 27 0.771 1998 2 4 0.924 1998 2 13 0.906 1998 2 20 0.803 1998 2 26 0.845 1998 3 5 1.007 1998 3 12 0.785 1998 3 19 0.647 1998 3 26 0.794 1998 4 2 0.708 1998 4 9 0.837 1998 4 17 0.758 1998 4 25 0.779 1998 5 1 0.669 1998 5 6 0.837 1998 5 15 0.597 1998 5 21 0.631 1998 5 28 0.717 1998 6 3 0.649 1998 6 9 0.750 1998 6 16 0.619 1998 6 25 0.668 1998 7 2 0.643 1998 7 8 0.785 1998 7 13 0.683 1998 7 27 0.689 1998 8 1 0.652 1998 8 7 0.769 1998 8 18 0.687 1998 8 25 0.652 1998 8 30 0.536 1998 9 15 0.706 1998 9 22 0.937 1998 10 2 0.764 1998 10 12 0.769 1998 10 28 0.831 1998 11 7 0.831 1998 11 12 0.796 1998 11 29 1.032 1998 12 10 0.749 1998 12 25 0.866 1999 1 14 0.770 1999 1 21 0.994 1999 1 31 0.824 1999 2 9 0.975 1999 3 4 0.930 1999 3 7 0.764 1999 3 10 0.801 1999 3 22 0.773 1999 3 29 0.641 1999 4 6 0.827 1999 4 14 0.854 1999 4 19 0.608 1999 4 27 0.564 1999 5 5 0.819 1999 5 11 0.726 1999 5 18 0.536 1999 5 26 0.765 1999 6 1 0.686 1999 6 10 0.659 1999 6 14 0.720 1999 6 27 0.521 1999 6 29 0.615 1999 7 6 0.664 1999 7 14 0.644 1999 7 20 0.799 1999 7 28 0.551 1999 8 4 0.583 1999 8 10 0.608 1999 8 19 0.604 1999 8 24 0.732 1999 8 30 0.674 1999 9 9 0.699 1999 9 13 0.719 1999 9 22 0.665 1999 9 28 0.782 1999 10 6 0.675 1999 10 12 0.783 1999 10 19 0.614 1999 10 25 0.657 1999 11 2 0.851 1999 11 10 0.705 1999 11 17 0.655 1999 11 23 0.784 1999 11 30 0.794 1999 12 6 0.756 1999 12 14 0.820 1999 12 20 0.771 1999 12 28 0.681 2000 1 3 0.935 2000 1 8 0.878 2000 1 17 0.822 2000 1 26 0.854 2000 2 3 0.928 2000 2 13 0.887 2000 2 19 0.824 2000 2 27 0.815 2000 3 7 0.962 2000 3 15 0.939 2000 3 28 0.860 2000 3 31 0.770 2000 4 11 0.821 2000 4 14 0.834 2000 4 22 0.718 2000 4 25 0.727 2000 5 7 0.699 2000 5 11 0.745 2000 5 23 0.641 2000 5 30 0.773 2000 6 8 0.658 2000 6 17 0.656 2000 6 22 0.462 2000 7 1 0.546 2000 7 10 0.676 2000 7 22 0.692 2000 7 26 0.624 2000 8 10 0.687 2000 8 14 0.690 2000 8 26 0.775 2000 8 30 0.723 2000 9 10 0.720 2000 9 17 0.781 2000 9 27 0.692 2000 10 2 0.808 2000 10 14 0.748 2000 10 17 0.809 2000 11 3 0.759 2000 11 9 0.846 2000 11 17 0.775 2000 11 23 0.884 2000 11 27 0.803 2000 12 14 0.946 2000 12 24 0.921 2000 12 29 0.903 2001 1 2 0.903 2001 1 26 0.987 2001 1 30 0.948 2002 2 2 0.925 2002 2 4 0.902 2002 2 8 0.976 2002 2 13 1.046 2002 2 18 0.941 2002 2 25 0.956 2002 3 5 0.940 2002 3 15 0.953 2002 3 19 1.153 2002 3 25 0.890 2002 3 31 0.902 2002 4 10 1.117 2002 4 17 0.914 2002 4 22 0.829 2002 5 1 0.958 2002 5 6 0.833 2002 5 13 0.697 2002 5 19 0.775 2002 5 27 0.845 2002 6 3 0.991 2002 6 12 0.838 2002 6 17 0.782 2002 6 24 0.761 2002 7 1 0.761 2002 7 9 0.758 2002 7 15 0.787 2002 7 22 0.916 2002 7 29 0.708 2002 8 6 0.794 2002 8 12 0.798 2002 8 19 0.786 2002 8 27 0.988 2002 9 2 0.838 2002 9 11 0.811 2002 9 20 1.021 2002 9 23 0.793 2002 9 30 0.869 2002 10 7 1.023 2002 10 14 0.912 2002 10 21 0.845 2002 10 30 0.883 2002 11 6 0.918 2002 11 12 0.909 2002 11 19 0.987 2002 11 27 1.185 2002 12 2 0.945 2002 12 9 1.103 2002 12 16 1.024 2002 12 26 0.992 2002 12 30 0.939 2003 1 5 1.061 2003 1 11 1.180 2003 1 21 1.135 2003 2 12 0.896 2003 2 17 0.924 2003 2 25 1.059 2003 3 3 0.891 2003 3 11 1.008 2003 3 17 0.977 2003 3 25 1.009 2003 4 1 0.947 2003 4 7 0.961 2003 4 14 1.022 2003 4 21 0.958 2003 4 28 0.899 2003 5 5 0.963 2003 5 13 0.938 2003 5 19 1.026 2003 5 27 1.069 2003 6 5 0.948 2003 6 9 0.938 2003 6 16 0.894 2003 6 25 1.036 2003 7 8 0.970 2003 7 28 0.964 2003 8 3 0.860 2003 8 8 0.935 2003 8 12 0.936 2003 8 19 0.955 2003 8 26 0.964 2003 9 5 1.051 2003 9 14 1.006 2003 9 17 0.887 2003 9 23 1.048 2003 10 10 0.980 2003 10 18 1.121 2003 10 26 1.033 2003 10 31 1.179 2003 11 4 1.054 2003 11 8 1.035 2003 11 15 1.053 2003 11 20 1.103 2003 11 26 0.991 2003 12 3 1.013 2003 12 9 1.156 2003 12 28 1.060 2004 1 10 1.047 2004 1 14 1.012 2004 1 20 1.089 2004 1 24 1.022 2004 1 29 1.030 2004 2 9 1.066 2004 2 17 1.180 2004 2 24 1.108 2004 3 3 1.017 2004 3 16 1.020 2004 3 24 1.078 2004 3 30 1.042 2004 4 6 1.091 2004 4 13 0.998 2004 4 20 0.997 2004 4 27 0.971 2004 5 6 0.983 2004 5 11 0.976 2004 5 18 0.945 2004 5 28 0.945 2004 6 2 0.950 2004 6 8 0.947 2004 6 15 0.892 2004 6 25 0.947 2004 6 29 0.921 2004 7 14 0.961 2004 7 22 0.961 2004 7 30 0.913 2004 8 3 1.016 2004 8 11 0.935 2004 8 17 1.014 2004 8 17 0.898 2004 8 24 1.056 2004 8 30 0.990 2004 9 6 1.016 2004 9 17 0.922 2004 9 21 1.098 2004 9 28 0.952 2004 10 3 1.084 2004 10 10 1.076 2004 10 18 1.192 2004 10 27 1.061 2004 11 2 1.125 2004 11 8 1.073 2004 11 14 1.211 2004 11 22 1.178 2004 11 29 1.197 2004 12 6 1.123 2004 12 13 1.221 2004 12 20 1.124 2004 12 27 1.256 2005 1 3 1.256 2005 1 10 1.200 2005 1 17 1.174 2005 1 25 1.221 2005 2 3 0.884 2005 2 14 0.942 2005 2 26 nan 2005 3 7 0.869 2005 3 28 0.932 2005 6 6 0.696 2005 6 14 0.740 2005 7 3 0.663 2005 7 15 nan 2005 7 25 0.526 2005 10 3 nan 2005 10 20 0.596 2005 11 14 nan 2005 11 21 0.772 2005 11 29 0.555 2006 2 3 0.640 2006 2 14 0.611 2006 3 8 0.518 2006 3 13 0.537 2006 3 22 0.915 2006 6 6 0.738 2006 6 29 0.700 2006 7 9 nan 2006 7 29 0.792 2006 10 7 0.894 2006 10 17 0.651 2006 11 6 0.792 2006 11 15 0.816 2006 11 19 0.833 2007 2 5 0.946 2007 2 20 0.807 2007 3 2 0.839 2007 3 14 0.833 2007 3 29 0.855 2007 6 4 0.780 2007 6 11 0.791 2007 7 5 0.802 2007 7 30 0.852 2007 10 4 0.952 2007 10 16 0.760 2007 10 30 0.777 2007 11 15 0.770 2007 11 28 0.806 2008 2 15 0.703 2008 3 22 0.549 2008 4 9 0.586 2008 4 26 0.740 2008 5 19 nan 2008 6 12 0.630 2008 9 10 nan 2008 10 12 nan 2008 11 22 nan 2008 12 2 nan 2009 1 3 nan 2009 1 26 nan 2009 2 13 nan 2009 3 12 nan 2009 4 16 0.597 2009 5 13 0.719 2009 6 19 0.599 2009 7 15 0.533 2009 8 15 0.652 2009 9 15 0.596 2009 10 15 0.646 2009 11 16 nan 2009 12 16 0.753 2010 1 15 0.689 2010 2 5 0.537 2010 3 16 nan 2010 4 7 0.690 2010 5 1 0.730 2010 8 10 0.476 2010 10 16 0.797 2010 12 7 0.737 2011 2 15 0.959 2011 3 15 0.896 2011 4 20 0.860 2011 5 12 0.600 2011 6 17 0.743 2011 7 25 0.706 2011 8 15 0.810 2011 9 22 0.784 2011 10 4 nan 2011 11 3 0.956 2011 12 12 0.960 2012 1 10 0.998 2012 2 19 1.009 2012 3 16 0.981 2012 4 18 0.793 2012 5 15 0.826 2012 6 11 0.928 2012 7 17 0.834 2012 8 16 0.900 2012 9 17 1.002 2012 10 12 0.810 2012 11 20 1.000 2012 12 17 1.015 2013 1 20 1.109 2013 2 9 0.811 2013 3 12 0.727 2013 4 24 0.758 2013 5 31 0.726 2013 6 10 0.669 2013 7 25 0.757 2013 8 18 0.751 2013 9 24 0.788 2013 10 16 nan 2013 11 24 0.861 2013 12 18 0.858 2014 1 26 0.754 2014 2 13 0.825 2014 3 19 0.778 2014 4 20 0.573 2014 5 12 0.588 2014 6 11 0.570 2014 7 11 0.645 2014 8 15 nan 2014 9 9 0.632 2014 10 3 0.808 2014 11 9 0.869 2014 12 23 0.810 2015 1 9 0.950 2015 2 16 1.273 2015 3 11 1.292 2015 4 20 1.232 2015 5 18 1.112 2015 6 15 1.221 2015 7 14 1.187 2015 8 16 1.193 2015 9 13 nan 2015 10 15 1.206 2015 11 16 1.377 2015 12 13 1.399 2016 1 8 1.342 2016 2 6 1.193 2016 4 13 1.166 2016 6 9 1.085 2016 8 2 1.003 2016 10 2 1.133 2016 12 8 1.318 2017 2 9 1.354 2017 3 12 1.268 2017 4 19 1.206 2017 5 6 1.134 2017 6 8 1.069 2017 7 6 1.009 2017 8 4 0.992 2017 9 19 1.031 2017 10 14 1.039 2017 11 10 1.065 2017 12 7 1.103 2018 1 15 1.068 2018 2 2 0.956 2018 2 15 1.090 2018 3 22 0.911 2018 4 18 0.962 2018 5 3 0.944 2018 6 19 0.843 2018 7 19 0.843 2018 8 23 0.870 2018 9 21 0.590 2018 10 15 0.512 2018 11 12 nan 2018 12 16 0.594 2019 1 17 1.087 2019 1 28 1.082 2019 2 4 nan 2019 2 12 nan 2019 2 19 0.965 2019 2 24 0.972 2019 3 4 0.955 2019 3 12 0.931 2019 3 18 0.946 2019 3 25 0.858 2019 4 4 0.958 2019 4 8 nan 2019 4 16 0.948 2019 4 25 0.975 2019 5 2 0.921 2019 5 6 0.875 2019 5 14 0.956 2019 5 16 0.910 2019 5 20 0.997 2019 5 30 0.910 2019 6 3 0.934 2019 6 10 0.901 2019 6 19 0.849 2019 6 25 nan 2019 7 5 0.697 2019 7 8 0.812 2019 7 19 0.813 2019 7 26 0.698 2019 7 30 0.788 2019 8 7 0.829 2019 8 17 0.815 2019 9 23 0.926 2019 10 4 0.817 2019 10 8 0.936 2019 10 17 0.902 2019 10 24 0.946 2019 10 28 0.979 2019 11 10 0.998 2019 11 15 0.857 2019 11 20 1.025 2019 11 27 0.909 2019 12 5 0.937 2019 12 10 0.904 2019 12 17 0.853 2019 12 23 0.916 2019 12 30 0.939 2020 1 6 0.874 2020 1 15 0.938 2020 1 20 1.010 2020 1 26 0.972