# file: smo_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: SMO -- Tutuila, Samoa -- 14.25 S, 170.56 W, 42 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 "smo_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 # F12ottoSMOyr F12ottoSMOmon F12ottoSMOm F12ottoSMOsd F12ottoSMOn 1995 1 nan nan 0 1995 2 nan nan 0 1995 3 520.470 1.857 1 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 9 522.143 0.770 2 1995 10 524.332 1.585 3 1995 11 524.600 0.931 1 1995 12 525.180 1.198 1 1996 1 527.177 0.708 3 1996 2 526.780 1.025 1 1996 3 526.240 1.204 1 1996 4 525.495 1.128 3 1996 5 526.705 0.940 4 1996 6 526.608 0.900 5 1996 7 526.650 0.722 2 1996 8 526.319 1.089 2 1996 9 527.725 1.249 3 1996 10 527.085 0.997 2 1996 11 529.833 0.990 4 1996 12 531.430 0.648 1 1997 1 530.900 0.911 3 1997 2 530.851 1.301 2 1997 3 530.763 1.538 3 1997 4 531.700 1.290 3 1997 5 530.360 1.190 1 1997 6 529.998 0.984 5 1997 7 531.058 0.931 3 1997 8 530.807 0.843 4 1997 9 531.950 1.216 2 1997 10 532.116 1.864 2 1997 11 532.562 0.952 3 1997 12 533.520 1.346 3 1998 1 532.430 1.344 1 1998 2 532.386 0.638 2 1998 3 532.172 1.105 5 1998 4 531.897 0.837 2 1998 5 532.734 1.087 4 1998 6 532.918 0.823 3 1998 7 533.801 0.902 3 1998 8 533.973 0.626 4 1998 9 534.828 1.032 4 1998 10 537.504 1.830 3 1998 11 537.637 1.290 4 1998 12 538.694 1.577 2 1999 1 537.748 0.793 4 1999 2 538.906 1.684 5 1999 3 539.209 1.740 2 1999 4 539.947 1.255 2 1999 5 537.902 1.212 3 1999 6 538.048 1.016 4 1999 7 537.249 0.632 5 1999 8 538.319 0.620 4 1999 9 538.267 0.823 3 1999 10 538.982 1.141 4 1999 11 538.312 1.052 4 1999 12 539.734 1.606 4 2000 1 540.635 1.031 4 2000 2 541.407 0.998 3 2000 3 540.083 1.094 3 2000 4 540.046 1.299 4 2000 5 540.826 0.735 3 2000 6 540.533 1.660 4 2000 7 541.531 1.326 3 2000 8 541.025 1.941 4 2000 9 540.582 1.423 4 2000 10 540.701 1.758 4 2000 11 541.049 1.013 5 2000 12 541.537 2.178 2 2001 1 541.665 0.938 5 2001 2 542.046 1.511 3 2001 3 541.887 1.278 3 2001 4 540.435 1.457 2 2001 5 540.847 0.680 5 2001 6 540.863 0.785 4 2001 7 540.489 0.860 3 2001 8 540.661 1.011 5 2001 9 540.746 0.760 4 2001 10 541.305 0.958 4 2001 11 542.367 1.286 4 2001 12 541.841 1.067 3 2002 1 542.776 0.978 6 2002 2 543.087 1.017 3 2002 3 542.343 1.313 5 2002 4 541.126 1.282 4 2002 5 541.526 1.040 6 2002 6 542.062 0.635 7 2002 7 542.161 0.842 4 2002 8 541.033 0.707 5 2002 9 541.468 0.744 5 2002 10 542.390 0.785 6 2002 11 542.653 0.735 5 2002 12 541.837 1.395 4 2003 1 541.504 0.770 7 2003 2 542.041 1.457 4 2003 3 542.681 0.923 6 2003 4 543.447 0.899 6 2003 5 540.734 0.951 7 2003 6 540.514 0.811 6 2003 7 540.328 0.925 5 2003 8 542.022 0.712 5 2003 9 541.977 0.745 6 2003 10 541.510 1.004 5 2003 11 542.434 0.865 5 2003 12 542.604 0.742 4 2004 1 542.514 1.422 3 2004 2 543.102 0.852 5 2004 3 543.016 1.116 5 2004 4 542.060 0.977 6 2004 5 541.406 0.671 4 2004 6 540.494 1.034 6 2004 7 541.246 0.717 4 2004 8 541.649 0.830 3 2004 9 540.562 0.962 6 2004 10 542.648 1.776 4 2004 11 542.039 1.105 5 2004 12 541.711 1.062 5 2005 1 541.544 1.265 5 2005 2 541.280 0.837 5 2005 3 541.727 1.653 6 2005 4 540.949 0.875 4 2005 5 539.476 1.125 4 2005 6 540.619 0.942 6 2005 7 539.649 1.125 5 2005 8 540.513 0.805 6 2005 9 540.496 0.738 4 2005 10 541.201 0.806 5 2005 11 542.332 1.369 3 2005 12 541.191 1.226 5 2006 1 541.501 1.431 4 2006 2 541.256 1.461 5 2006 3 541.106 1.308 4 2006 4 540.487 1.231 4 2006 5 540.157 0.957 6 2006 6 539.721 0.943 4 2006 7 539.382 0.878 4 2006 8 538.909 0.871 7 2006 9 538.706 0.972 3 2006 10 538.980 0.879 5 2006 11 539.159 1.042 5 2006 12 538.674 0.950 5 2007 1 538.121 0.876 5 2007 2 538.926 0.833 5 2007 3 539.042 1.088 5 2007 4 539.638 1.068 5 2007 5 538.360 0.923 4 2007 6 536.475 0.914 4 2007 7 536.918 0.735 4 2007 8 536.609 1.064 6 2007 9 537.517 1.217 4 2007 10 536.452 1.254 5 2007 11 536.962 1.221 5 2007 12 536.784 1.331 4 2008 1 536.400 1.238 5 2008 2 536.747 1.292 5 2008 3 535.222 1.394 5 2008 4 535.350 0.826 6 2008 5 535.222 0.847 5 2008 6 534.883 0.800 5 2008 7 534.700 0.915 6 2008 8 534.569 0.815 5 2008 9 534.704 1.077 4 2008 10 534.111 0.850 6 2008 11 534.078 0.801 5 2008 12 534.526 0.836 4 2009 1 534.962 1.040 5 2009 2 534.836 1.191 3 2009 3 534.397 1.197 5 2009 4 533.548 0.997 6 2009 5 533.114 0.714 5 2009 6 532.381 0.845 4 2009 7 530.954 0.822 9 2009 8 532.095 0.916 6 2009 9 531.454 0.956 9 2009 10 531.352 0.807 3 2009 11 531.482 0.979 6 2009 12 530.905 1.123 6 2010 1 531.544 1.063 3 2010 2 528.730 1.200 1 2010 3 532.152 1.485 4 2010 4 nan nan 0 2010 5 nan nan 0 2010 6 529.820 0.647 1 2010 7 529.249 0.982 4 2010 8 529.486 0.707 4 2010 9 529.270 0.670 5 2010 10 528.207 0.925 3 2010 11 528.640 1.135 1 2010 12 528.720 0.973 4 2011 1 529.036 1.324 3 2011 2 528.222 1.773 2 2011 3 527.855 0.837 5 2011 4 528.904 0.850 3 2011 5 528.331 0.676 4 2011 6 527.122 0.843 3 2011 7 526.570 0.940 3 2011 8 527.512 1.123 3 2011 9 527.316 0.731 6 2011 10 526.696 0.805 5 2011 11 526.468 0.838 3 2011 12 527.011 0.816 2 2012 1 525.746 1.160 2 2012 2 526.648 1.686 4 2012 3 525.360 0.896 4 2012 4 524.749 0.872 4 2012 5 523.828 1.000 2 2012 6 524.262 0.725 4 2012 7 522.722 0.971 4 2012 8 523.742 0.878 3 2012 9 523.891 0.856 4 2012 10 523.778 1.082 5 2012 11 522.987 0.935 4 2012 12 523.113 1.149 4 2013 1 523.514 0.813 5 2013 2 523.223 0.774 5 2013 3 522.375 0.647 4 2013 4 522.888 0.676 3 2013 5 521.946 0.640 5 2013 6 521.943 0.747 4 2013 7 521.672 0.930 4 2013 8 521.657 0.593 6 2013 9 521.915 1.133 4 2013 10 521.207 0.399 4 2013 11 520.489 0.964 4 2013 12 520.797 1.142 4 2014 1 521.042 0.675 5 2014 2 520.676 1.079 3 2014 3 521.022 0.941 3 2014 4 520.531 0.629 5 2014 5 519.209 0.950 2 2014 6 519.545 0.634 3 2014 7 519.535 0.637 5 2014 8 518.936 0.778 4 2014 9 519.265 0.784 5 2014 10 519.105 0.846 4 2014 11 519.149 0.742 4 2014 12 518.447 0.541 5 2015 1 519.141 1.084 3 2015 2 518.680 2.726 3 2015 3 nan nan 0 2015 4 nan nan 0 2015 5 nan nan 0 2015 6 nan nan 0 2015 7 nan nan 0 2015 8 516.320 8.043 1 2015 9 516.470 2.251 2 2015 10 515.805 1.955 3 2015 11 nan nan 0 2015 12 nan nan 0 2016 1 nan nan 0 2016 2 nan nan 0 2016 3 nan nan 0 2016 4 515.140 3.614 1 2016 5 nan nan 0 2016 6 nan nan 0 2016 7 nan nan 0 2016 8 513.020 2.983 1 2016 9 nan nan 0 2016 10 nan nan 0 2016 11 nan nan 0 2016 12 511.250 1.775 1 2017 1 nan nan 0 2017 2 513.170 8.425 1 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