# file: spo_F12_MM.dat # # Atmospheric measurements of CCl2F2 (CFC-12, Chlorofluorocarbon-12, F12) # # Measurements are from the NOAA/ESRL/GMD/HATS flask program # (http://www.esrl.noaa.gov/gmd/hats/flask/flasks.html). # Instrument ID: Otto # # Location: SPO -- South Pole, Antarctica -- 89.98 S, 24.80 W, 2810 m Elev. # See http://www.esrl.noaa.gov/gmd/dv/site/site_table.html#hats_flask for # more information about flask sampling sites. # # The data reported are from samples collected approximately once per week in # matching, concurrent, flask pairs and later analyzed on a gas chromatograph # with electron capture detection (GC-ECD) located in Boulder, Colorado, USA. # This system uses two standard reference gases for calibration and has been # in operation since very early in 1995. # # These data represent monthly mean estimates computed using those data marked # with a 0 in flag column 7 of the companion file named "spo_F12_All.dat". With # flask samples collected only weekly on average, monthly sampling statistics # are poor at best. As a result, the error reported is either the standard # deviation of the mean or a floor single-sample precision estimate. # # PIs: Dr. James W. Elkins, Dr. Bradley D. Hall, # Debra J. Mondeel, J. David Nance # # National Oceanic and Atmospheric Administration (NOAA) # Earth System Research Laboratory (ESRL) # 325 Broadway, R/GMD1 # Boulder, CO 80305-3328 # # Email: James.W.Elkins@noaa.gov; Bradley.Hall@noaa.gov # Phone: (303) 497-6224 (303) 497-7011 # # Email: Debra.J.Mondeel@noaa.gov; David.Nance@noaa.gov # Phone: (303) 497-6013 (303) 497-7002 # # Fax: (303) 497-6290 # # Data use policy: # If you use this data in a publication or report, we would appreciate that you # contact the principal investigators (PIs) first and discuss your interests. # The PIs can discuss the quality of the data and any potential problems with # its analysis. Please contact the PIs for more information. The data should # be cited in presentations or publications along the following lines: CFC-12 # data from the NOAA/ESRL halocarbons flask program. # # Calibration scale: NOAA 2008 # See http://www.esrl.noaa.gov/gmd/ccl/scales.html for more information about # calibration scales. # # Units: ppt # # Missing value: "nan" # # Data Columns: # yr Year # mon Month # m Monthly mean concentration of F12 in ppt # sd Standard deviation of the mean (or single-sample precision value) # n Number of samples # F12ottoSPOyr F12ottoSPOmon F12ottoSPOm F12ottoSPOsd F12ottoSPOn 1995 1 514.230 1.995 1 1995 2 514.910 1.579 1 1995 3 515.236 1.579 2 1995 4 nan nan 0 1995 5 516.280 1.151 1 1995 6 nan nan 0 1995 7 519.224 2.027 2 1995 8 519.610 2.448 1 1995 9 519.130 1.151 1 1995 10 521.440 2.075 1 1995 11 520.346 2.310 3 1995 12 520.200 1.151 1 1996 1 522.188 1.822 2 1996 2 520.970 1.428 2 1996 3 nan nan 0 1996 4 524.750 1.396 1 1996 5 524.170 2.310 1 1996 6 524.403 0.974 3 1996 7 524.420 1.948 1 1996 8 525.039 1.655 2 1996 9 525.929 1.452 3 1996 10 524.920 0.626 1 1996 11 526.346 0.626 2 1996 12 526.950 1.144 2 1997 1 527.440 0.886 2 1997 2 527.973 1.380 2 1997 3 526.290 0.934 1 1997 4 527.711 0.890 2 1997 5 527.876 1.457 2 1997 6 528.193 0.833 2 1997 7 527.980 1.607 1 1997 8 529.270 1.850 1 1997 9 529.910 1.380 1 1997 10 529.560 0.869 1 1997 11 nan nan 0 1997 12 530.710 1.694 1 1998 1 nan nan 0 1998 2 529.957 1.315 2 1998 3 530.573 1.172 2 1998 4 nan nan 0 1998 5 531.537 1.028 2 1998 6 531.708 0.868 2 1998 7 532.842 0.594 2 1998 8 532.070 0.797 1 1998 9 533.193 0.800 2 1998 10 533.120 1.271 3 1998 11 nan nan 0 1998 12 533.310 1.585 1 1999 1 533.760 1.098 1 1999 2 534.497 0.791 3 1999 3 535.400 1.554 1 1999 4 534.710 0.892 1 1999 5 536.850 2.035 1 1999 6 534.923 1.017 3 1999 7 535.030 0.794 1 1999 8 535.504 0.757 2 1999 9 536.175 0.943 2 1999 10 536.841 1.308 2 1999 11 534.710 0.715 1 1999 12 537.121 0.943 2 2000 1 536.078 1.421 2 2000 2 536.719 0.624 2 2000 3 536.572 0.991 2 2000 4 536.043 0.787 2 2000 5 537.590 0.764 1 2000 6 536.284 0.996 2 2000 7 537.064 0.500 2 2000 8 537.809 1.131 2 2000 9 538.200 0.443 1 2000 10 537.830 0.485 1 2000 11 538.759 1.117 2 2000 12 538.988 1.091 2 2001 1 538.763 0.733 2 2001 2 538.318 1.053 3 2001 3 538.207 1.064 2 2001 4 538.266 1.219 2 2001 5 538.064 1.291 2 2001 6 538.376 1.145 2 2001 7 538.534 1.247 2 2001 8 538.978 1.160 2 2001 9 539.965 0.992 2 2001 10 540.258 1.213 2 2001 11 539.757 0.889 3 2001 12 540.398 1.365 2 2002 1 540.680 1.336 2 2002 2 540.022 1.072 3 2002 3 541.110 1.149 1 2002 4 540.190 1.170 2 2002 5 540.284 1.283 2 2002 6 539.909 1.138 3 2002 7 540.742 1.170 2 2002 8 541.308 0.961 3 2002 9 540.960 1.122 3 2002 10 541.125 0.863 3 2002 11 541.003 1.062 2 2002 12 539.530 1.216 3 2003 1 539.385 0.912 3 2003 2 540.160 1.189 3 2003 3 538.656 0.946 3 2003 4 538.956 0.684 3 2003 5 538.936 0.947 3 2003 6 540.186 0.880 3 2003 7 540.069 0.684 3 2003 8 540.145 0.974 3 2003 9 540.810 1.206 3 2003 10 541.056 0.710 3 2003 11 540.352 0.982 2 2003 12 540.630 0.904 3 2004 1 540.962 0.857 3 2004 2 540.334 0.876 3 2004 3 539.649 1.247 3 2004 4 540.347 1.539 3 2004 5 539.552 1.145 3 2004 6 539.298 1.136 3 2004 7 539.989 0.806 2 2004 8 539.951 0.883 3 2004 9 539.324 1.150 3 2004 10 540.527 1.248 2 2004 11 539.987 1.107 3 2004 12 540.478 1.070 3 2005 1 539.871 2.034 2 2005 2 540.438 1.145 2 2005 3 538.877 1.281 3 2005 4 538.920 1.461 3 2005 5 538.240 1.197 3 2005 6 539.199 1.356 2 2005 7 539.068 1.160 3 2005 8 540.341 1.639 3 2005 9 538.901 1.497 3 2005 10 539.760 0.892 3 2005 11 539.721 1.553 3 2005 12 538.947 1.365 4 2006 1 538.610 0.948 5 2006 2 538.821 0.906 3 2006 3 537.991 1.216 2 2006 4 538.119 1.062 3 2006 5 537.918 1.056 3 2006 6 537.459 0.868 3 2006 7 538.511 1.102 3 2006 8 537.836 0.979 3 2006 9 538.233 1.719 3 2006 10 537.953 0.990 3 2006 11 538.124 1.437 3 2006 12 537.429 0.878 3 2007 1 537.013 1.326 3 2007 2 536.841 1.165 2 2007 3 535.868 1.208 3 2007 4 535.261 1.072 3 2007 5 534.942 0.753 2 2007 6 535.168 0.906 3 2007 7 535.300 1.246 3 2007 8 535.173 1.215 4 2007 9 535.330 1.042 1 2007 10 535.064 1.186 3 2007 11 534.990 1.158 3 2007 12 534.626 1.160 3 2008 1 535.304 1.152 4 2008 2 534.411 1.127 3 2008 3 534.006 1.522 3 2008 4 533.473 1.105 3 2008 5 534.049 1.328 3 2008 6 534.120 1.127 4 2008 7 534.045 1.196 3 2008 8 533.625 1.659 2 2008 9 533.452 1.850 3 2008 10 534.078 1.099 4 2008 11 533.882 0.935 2 2008 12 533.376 0.943 4 2009 1 532.681 0.963 4 2009 2 532.920 0.831 4 2009 3 531.043 1.291 3 2009 4 530.543 1.304 4 2009 5 530.000 1.148 2 2009 6 530.258 0.915 4 2009 7 530.887 0.893 3 2009 8 530.889 1.173 4 2009 9 530.300 0.971 3 2009 10 529.817 1.263 2 2009 11 530.579 0.966 4 2009 12 529.883 0.868 4 2010 1 529.836 0.874 2 2010 2 530.097 1.260 3 2010 3 528.931 0.822 3 2010 4 528.839 0.841 3 2010 5 528.903 0.765 3 2010 6 528.679 0.999 4 2010 7 528.479 0.988 3 2010 8 528.654 1.419 3 2010 9 528.198 0.962 3 2010 10 527.948 1.100 4 2010 11 528.013 0.962 3 2010 12 527.860 1.030 4 2011 1 527.824 1.097 2 2011 2 527.885 0.807 4 2011 3 526.932 0.775 3 2011 4 526.766 0.929 3 2011 5 526.210 1.055 2 2011 6 526.396 0.563 3 2011 7 526.242 0.628 3 2011 8 526.238 1.118 4 2011 9 526.383 1.323 3 2011 10 527.328 0.964 3 2011 11 526.209 1.612 2 2011 12 524.810 1.356 3 2012 1 525.340 1.149 3 2012 2 524.524 0.901 4 2012 3 523.576 0.846 3 2012 4 523.746 0.738 4 2012 5 523.302 0.731 3 2012 6 524.043 0.904 3 2012 7 523.580 1.286 1 2012 8 522.904 0.839 4 2012 9 523.228 0.724 2 2012 10 522.746 0.636 3 2012 11 522.963 0.751 3 2012 12 521.303 1.278 2 2013 1 522.220 0.770 1 2013 2 521.709 0.995 4 2013 3 520.874 0.976 3 2013 4 520.113 0.750 4 2013 5 520.478 0.743 3 2013 6 520.426 0.702 4 2013 7 520.384 0.797 3 2013 8 520.659 0.842 4 2013 9 520.663 1.372 2 2013 10 519.753 0.716 4 2013 11 519.976 0.747 2 2013 12 519.484 0.843 4 2014 1 519.234 0.863 3 2014 2 518.940 0.793 4 2014 3 518.710 0.811 3 2014 4 517.944 0.692 4 2014 5 517.641 0.814 3 2014 6 517.512 0.646 4 2014 7 517.808 0.724 3 2014 8 517.652 0.864 3 2014 9 517.909 0.948 3 2014 10 516.951 1.196 4 2014 11 518.110 1.436 1 2014 12 519.110 13.291 1 2015 1 nan nan 0 2015 2 518.128 2.653 2 2015 3 516.396 1.283 2 2015 4 515.835 0.968 2 2015 5 516.536 1.683 2 2015 6 516.699 1.732 3 2015 7 515.917 1.266 2 2015 8 516.382 2.088 2 2015 9 516.400 1.088 1 2015 10 515.961 1.512 2 2015 11 516.210 7.287 1 2015 12 nan nan 0 2016 1 nan nan 0 2016 2 nan nan 0 2016 3 514.710 1.897 1 2016 4 nan nan 0 2016 5 nan nan 0 2016 6 nan nan 0 2016 7 nan nan 0 2016 8 nan nan 0 2016 9 513.280 3.066 1 2016 10 510.950 3.519 1 2016 11 510.990 1.870 1 2016 12 nan nan 0 2017 1 nan nan 0 2017 2 nan nan 0 2017 3 nan nan 0 2017 4 nan nan 0 2017 5 nan nan 0 2017 6 nan nan 0 2017 7 nan nan 0 2017 8 nan nan 0 2017 9 nan nan 0 2017 10 nan nan 0 2017 11 nan nan 0 2017 12 nan nan 0