# file: cgo_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: CGO -- Cape Grim, Tasmania -- 40.68 S, 144.69 E, 94 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 "cgo_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 # F12ottoCGOyr F12ottoCGOmon F12ottoCGOm F12ottoCGOsd F12ottoCGOn 1994 1 nan nan 0 1994 2 nan nan 0 1994 3 nan nan 0 1994 4 nan nan 0 1994 5 nan nan 0 1994 6 nan nan 0 1994 7 nan nan 0 1994 8 nan nan 0 1994 9 nan nan 0 1994 10 nan nan 0 1994 11 514.980 1.764 1 1994 12 516.527 1.961 4 1995 1 nan nan 0 1995 2 515.370 2.178 1 1995 3 516.032 3.561 3 1995 4 nan nan 0 1995 5 nan nan 0 1995 6 nan nan 0 1995 7 nan nan 0 1995 8 nan nan 0 1995 9 521.540 1.416 1 1995 10 520.392 1.425 3 1995 11 522.472 0.781 3 1995 12 nan nan 0 1996 1 521.526 0.999 2 1996 2 522.357 1.035 3 1996 3 521.941 1.061 4 1996 4 522.798 1.204 2 1996 5 523.599 0.975 4 1996 6 524.552 1.030 3 1996 7 523.630 0.862 3 1996 8 524.616 0.966 4 1996 9 525.502 0.661 4 1996 10 526.075 0.813 3 1996 11 526.204 0.700 2 1996 12 526.850 0.775 1 1997 1 526.790 0.824 2 1997 2 527.361 1.093 2 1997 3 528.656 0.916 5 1997 4 527.300 1.586 1 1997 5 528.277 0.924 4 1997 6 530.845 0.698 2 1997 7 529.354 0.915 5 1997 8 529.369 0.960 2 1997 9 530.999 1.142 2 1997 10 531.560 2.125 1 1997 11 530.981 1.138 4 1997 12 530.694 1.656 4 1998 1 530.915 1.265 2 1998 2 530.660 1.308 3 1998 3 530.918 0.812 5 1998 4 530.408 0.874 4 1998 5 531.188 1.019 3 1998 6 531.547 0.669 4 1998 7 531.851 0.743 3 1998 8 532.770 0.590 2 1998 9 533.939 1.554 3 1998 10 534.953 0.982 5 1998 11 534.592 1.190 5 1998 12 534.487 1.220 2 1999 1 534.315 0.813 2 1999 2 534.809 0.896 3 1999 3 535.709 1.392 5 1999 4 535.925 1.063 4 1999 5 535.207 0.705 4 1999 6 536.116 0.580 4 1999 7 535.252 0.619 3 1999 8 536.342 0.761 3 1999 9 536.879 0.774 5 1999 10 536.648 0.709 6 1999 11 537.731 0.947 3 1999 12 537.362 1.072 2 2000 1 538.530 0.937 1 2000 2 537.160 1.001 3 2000 3 537.399 0.778 4 2000 4 538.174 1.045 3 2000 5 538.650 1.440 4 2000 6 539.180 1.409 4 2000 7 539.649 1.596 2 2000 8 538.262 1.075 4 2000 9 538.821 0.786 4 2000 10 539.106 0.784 4 2000 11 538.467 0.788 4 2000 12 539.165 0.938 3 2001 1 538.751 0.693 4 2001 2 538.630 1.703 3 2001 3 537.792 0.791 3 2001 4 538.575 1.001 3 2001 5 539.510 0.672 2 2001 6 539.110 0.873 4 2001 7 539.376 0.721 3 2001 8 539.472 0.831 3 2001 9 539.481 0.762 4 2001 10 539.383 0.652 5 2001 11 540.697 1.229 3 2001 12 540.580 1.117 2 2002 1 540.269 0.885 5 2002 2 540.428 1.245 4 2002 3 540.699 1.197 4 2002 4 539.544 1.096 2 2002 5 540.006 0.819 3 2002 6 541.520 0.916 5 2002 7 541.311 0.688 3 2002 8 540.380 0.815 4 2002 9 540.189 0.841 3 2002 10 540.861 0.668 6 2002 11 541.501 0.828 4 2002 12 540.145 1.166 5 2003 1 539.672 0.705 5 2003 2 539.875 0.577 4 2003 3 540.386 0.719 4 2003 4 540.309 0.893 3 2003 5 539.412 0.836 4 2003 6 539.342 1.550 3 2003 7 540.358 0.769 3 2003 8 539.865 0.887 4 2003 9 541.142 0.975 4 2003 10 540.801 1.138 3 2003 11 542.295 0.780 5 2003 12 541.684 0.816 3 2004 1 540.581 1.111 3 2004 2 541.033 0.657 7 2004 3 540.088 0.826 5 2004 4 540.024 0.868 3 2004 5 539.325 0.994 6 2004 6 539.679 0.788 6 2004 7 539.901 0.826 6 2004 8 540.122 0.758 3 2004 9 539.939 1.088 6 2004 10 540.381 2.199 4 2004 11 540.360 1.298 3 2004 12 539.829 1.124 5 2005 1 539.960 1.143 5 2005 2 539.490 0.858 5 2005 3 540.053 2.197 2 2005 4 538.351 0.915 5 2005 5 538.582 1.081 5 2005 6 538.640 0.837 2 2005 7 538.157 1.337 3 2005 8 539.424 0.876 5 2005 9 539.467 0.820 3 2005 10 539.660 1.128 3 2005 11 540.218 0.834 2 2005 12 540.306 1.340 5 2006 1 539.950 1.111 3 2006 2 538.013 0.889 4 2006 3 538.662 1.355 4 2006 4 538.448 0.717 4 2006 5 538.120 0.930 2 2006 6 538.232 0.818 3 2006 7 538.411 0.974 4 2006 8 539.248 0.846 3 2006 9 538.466 0.950 5 2006 10 538.044 0.935 4 2006 11 538.103 0.978 4 2006 12 537.814 1.434 3 2007 1 537.577 0.959 4 2007 2 536.769 1.254 2 2007 3 537.107 1.108 4 2007 4 nan nan 0 2007 5 535.301 0.855 4 2007 6 535.080 1.082 3 2007 7 535.288 0.718 4 2007 8 535.608 0.638 4 2007 9 535.698 0.714 4 2007 10 536.130 0.933 4 2007 11 535.676 1.150 3 2007 12 534.736 1.431 4 2008 1 535.473 1.391 4 2008 2 534.865 1.318 5 2008 3 533.912 1.130 4 2008 4 533.079 1.773 2 2008 5 533.548 1.014 2 2008 6 533.341 0.894 4 2008 7 533.570 0.709 7 2008 8 533.816 0.752 3 2008 9 534.010 1.362 5 2008 10 533.248 0.714 5 2008 11 534.159 0.950 4 2008 12 533.431 0.933 4 2009 1 533.331 1.093 2 2009 2 533.759 1.466 2 2009 3 532.700 1.338 4 2009 4 531.662 0.968 5 2009 5 532.091 0.866 3 2009 6 530.924 0.759 3 2009 7 530.620 0.886 3 2009 8 530.729 1.123 6 2009 9 530.721 0.862 3 2009 10 530.210 1.390 1 2009 11 530.731 1.246 4 2009 12 530.357 0.792 4 2010 1 529.930 1.310 4 2010 2 529.909 1.450 2 2010 3 530.130 1.104 3 2010 4 529.293 1.188 2 2010 5 528.319 1.221 2 2010 6 528.531 0.990 4 2010 7 528.579 0.856 3 2010 8 528.533 0.622 7 2010 9 528.092 1.055 4 2010 10 528.724 1.358 2 2010 11 527.724 1.065 3 2010 12 527.389 1.103 3 2011 1 528.284 1.287 3 2011 2 526.639 1.046 2 2011 3 526.552 0.944 4 2011 4 526.859 1.416 2 2011 5 526.938 1.116 4 2011 6 526.086 0.807 4 2011 7 526.256 0.933 3 2011 8 525.667 0.963 2 2011 9 525.264 0.818 2 2011 10 526.110 0.655 3 2011 11 525.410 0.908 4 2011 12 524.190 1.118 1 2012 1 525.150 1.681 1 2012 2 525.696 1.610 2 2012 3 524.322 0.840 2 2012 4 523.559 0.856 2 2012 5 523.417 0.955 2 2012 6 523.461 1.028 4 2012 7 523.162 0.755 2 2012 8 523.600 0.832 5 2012 9 523.628 0.870 4 2012 10 nan nan 0 2012 11 522.475 1.027 2 2012 12 522.654 0.822 3 2013 1 521.793 1.044 3 2013 2 521.353 0.959 4 2013 3 521.590 0.723 3 2013 4 521.362 0.639 2 2013 5 520.740 1.223 1 2013 6 nan nan 0 2013 7 nan nan 0 2013 8 521.285 0.764 4 2013 9 520.582 0.786 4 2013 10 520.668 0.782 4 2013 11 520.100 0.751 2 2013 12 519.561 0.763 3 2014 1 519.307 0.773 2 2014 2 519.313 0.926 2 2014 3 518.609 0.850 4 2014 4 518.610 0.692 1 2014 5 519.370 1.132 1 2014 6 518.543 0.598 3 2014 7 518.234 0.955 2 2014 8 nan nan 0 2014 9 519.245 0.918 3 2014 10 518.207 0.933 2 2014 11 518.385 0.477 3 2014 12 517.975 0.741 3 2015 1 517.480 3.112 1 2015 2 516.690 1.056 1 2015 3 516.322 1.838 2 2015 4 nan nan 0 2015 5 nan nan 0 2015 6 516.131 3.463 2 2015 7 nan nan 0 2015 8 516.780 4.617 1 2015 9 516.681 3.612 3 2015 10 516.250 1.720 1 2015 11 515.470 2.276 1 2015 12 515.110 1.992 1 2016 1 nan nan 0 2016 2 nan nan 0 2016 3 513.280 7.619 1 2016 4 513.520 6.823 1 2016 5 513.860 10.232 1 2016 6 nan nan 0 2016 7 513.030 2.733 1 2016 8 nan nan 0 2016 9 nan nan 0 2016 10 nan nan 0 2016 11 nan nan 0 2016 12 nan nan 0 2017 1 511.980 2.877 1 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