# # 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: atmospheric d(O2/N2) measurement # STATION NAME : Syowa Station, Antarctica # LOCATION: 69.00 S, 39.58 E # CONTRIBUTOR: Tohoku University and National Institute of Polar Research # CONTACT PERSON: Shinji Morimoto (mon@tohoku.ac.jp), Daisuke Goto (goto.daisuke@nipr.ac.jp) # PARAMETER: O2/N2 # COVERING PERIOD: 2008-01 2020-01 # DATA FREQUENCY: monthly average # MEASUREMENT UNIT: per meg # MEASUREMENT METHOD: Fuel Cell (Oxizilla FC-2) # SAMPLING TYPE: continuous # MEASUREMENT SCALE: Tohoku University scale # REMARKS: date are shown in local time (UTC+3) # VERSION: 20210319 # REFERENCES: # Morimoto, S., S. Ishidoya, D. Goto, A. Ogi, S. Aoki and T. Nakazawa, High precision continuous measurement system of the atmospheric O2/N2 ratio using a fuel cell oxygen analyzer, WMO/GAW report no. 186, 67-70, 2009. # year month monthly_mean(per meg) standard_deviation(per meg) 2008 1 -210.88 3.87 2008 2 -209.89 3.58 2008 3 -215.61 3.95 2008 4 -229.12 5.59 2008 5 -241.00 5.84 2008 6 -254.34 5.40 2008 7 -273.51 5.63 2008 8 -284.22 3.97 2008 9 -296.31 3.61 2008 10 -294.06 2.52 2008 11 -286.49 5.62 2008 12 -265.96 7.27 2009 1 -241.33 17.33 2009 2 -221.16 3.62 2009 3 -231.88 4.76 2009 4 -244.42 5.18 2009 5 -258.53 4.70 2009 6 -270.52 3.69 2009 7 -282.93 4.66 2009 8 -293.38 3.68 2009 9 -304.12 2.90 2009 10 -306.84 3.62 2009 11 -300.92 4.45 2009 12 -279.60 6.11 2010 1 -254.27 19.68 2010 2 -230.84 5.61 2010 3 -236.29 3.42 2010 4 -249.00 4.59 2010 5 -261.11 3.59 2010 6 -275.05 6.40 2010 7 -292.54 4.54 2010 8 -306.33 5.48 2010 9 -316.16 3.62 2010 10 -325.06 4.06 2010 11 -317.11 3.41 2010 12 -297.41 9.35 2011 1 -267.82 12.93 2011 2 -263.69 4.42 2011 3 -271.91 7.99 2011 4 -287.70 5.56 2011 5 -300.48 4.75 2011 6 -314.30 8.45 2011 7 -329.25 2.49 2011 8 -337.91 3.89 2011 9 -345.50 2.38 2011 10 -345.51 3.33 2011 11 -338.97 4.24 2011 12 -320.70 9.40 2012 1 -296.92 6.30 2012 2 -279.34 5.43 2012 3 -289.10 4.90 2012 4 -301.99 4.72 2012 5 -315.71 4.78 2012 6 -332.62 6.63 2012 7 -345.19 5.77 2012 8 -362.00 4.66 2012 9 -366.87 2.80 2012 10 -367.90 2.61 2012 11 -356.56 4.05 2012 12 -341.17 7.75 2013 1 -322.15 11.79 2013 2 -316.79 4.07 2013 3 -320.81 3.33 2013 4 -333.27 5.28 2013 5 -346.34 4.45 2013 6 -358.70 5.52 2013 7 -374.60 3.57 2013 8 -384.33 2.15 2013 9 -385.46 2.94 2013 10 -385.22 3.27 2013 11 -374.95 4.94 2013 12 -356.35 9.05 2014 1 -339.98 6.50 2014 2 -328.41 4.63 2014 3 -332.74 3.76 2014 4 -346.84 5.08 2014 5 -359.71 5.22 2014 6 -369.17 4.82 2014 7 -382.73 4.66 2014 8 -389.99 7.58 2014 9 -398.10 2.91 2014 10 -396.75 2.01 2014 11 -387.77 2.60 2014 12 -381.10 5.07 2015 1 -370.22 4.27 2015 2 -361.46 3.95 2015 3 -366.32 3.51 2015 4 -379.54 4.75 2015 5 -392.41 9.07 2015 6 -408.05 4.41 2015 7 -422.87 9.54 2015 8 -439.61 5.25 2015 9 -448.22 3.05 2015 10 -444.47 7.37 2015 11 -440.60 5.27 2015 12 -423.83 7.16 2016 1 -400.58 9.54 2016 2 -387.59 5.70 2016 3 -385.09 5.41 2016 4 -401.39 5.42 2016 5 -419.71 6.10 2016 6 -439.12 3.88 2016 7 -451.00 9.86 2016 8 -470.37 4.18 2016 9 -479.22 4.00 2016 10 -483.02 3.46 2016 11 -472.54 3.97 2016 12 -457.29 5.51 2017 1 -438.21 7.96 2017 2 -419.02 6.75 2017 3 -414.92 3.90 2017 4 -426.71 6.74 2017 5 -442.84 5.75 2017 6 -459.36 5.80 2017 7 -477.26 7.61 2017 8 -493.91 14.23 2017 9 -505.46 11.14 2017 10 -502.76 6.56 2017 11 -492.90 7.10 2017 12 -474.09 6.14 2018 1 -454.33 12.77 2018 2 -432.12 9.69 2018 3 -446.87 3.95 2018 4 -459.47 4.30 2018 5 -474.01 4.74 2018 6 -486.80 3.92 2018 7 -502.95 9.73 2018 8 -517.79 5.77 2018 9 -528.29 4.46 2018 10 -530.35 3.86 2018 11 -520.62 5.77 2018 12 -496.57 12.67 2019 1 -478.23 10.46 2019 2 -474.60 7.58 2019 3 -477.68 3.82 2019 4 -494.39 5.44 2019 5 -512.87 5.35 2019 6 -525.59 5.51 2019 7 -536.57 5.64 2019 8 -551.30 4.42 2019 9 -560.59 3.78 2019 10 -565.78 6.54 2019 11 -556.29 4.80 2019 12 -539.59 9.63 2020 1 -507.61 7.87