# file: mhd_SF6_MM.dat # # Atmospheric measurements of SF6 (Sulphur Hexaflouride) # # Measurements are from the NOAA/ESRL/GMD/HATS flask program # (http://www.esrl.noaa.gov/gmd/hats/flask/flasks.html). # Instrument ID: Otto # # Location: MHD -- Mace Head, Ireland -- 53.33 N, 9.90 W, 25 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 "mhd_SF6_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: Sulphur Hexaflouride # data from the NOAA/ESRL halocarbons flask program. # # Calibration scale: NOAA 2014 # 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 SF6 in ppt # sd Standard deviation of the mean (or single-sample precision value) # n Number of samples # SF6ottoMHDyr SF6ottoMHDmon SF6ottoMHDm SF6ottoMHDsd SF6ottoMHDn 1998 1 nan nan 0 1998 2 nan nan 0 1998 3 nan nan 0 1998 4 nan nan 0 1998 5 nan nan 0 1998 6 nan nan 0 1998 7 nan nan 0 1998 8 nan nan 0 1998 9 nan nan 0 1998 10 4.390 0.069 1 1998 11 4.386 0.067 2 1998 12 4.400 0.082 1 1999 1 4.480 0.102 1 1999 2 4.370 0.089 1 1999 3 nan nan 0 1999 4 4.460 0.056 1 1999 5 nan nan 0 1999 6 4.540 0.072 1 1999 7 4.549 0.059 2 1999 8 4.513 0.084 2 1999 9 nan nan 0 1999 10 nan nan 0 1999 11 nan nan 0 1999 12 nan nan 0 2000 1 nan nan 0 2000 2 nan nan 0 2000 3 nan nan 0 2000 4 nan nan 0 2000 5 nan nan 0 2000 6 nan nan 0 2000 7 nan nan 0 2000 8 nan nan 0 2000 9 nan nan 0 2000 10 nan nan 0 2000 11 nan nan 0 2000 12 nan nan 0 2001 1 nan nan 0 2001 2 nan nan 0 2001 3 nan nan 0 2001 4 nan nan 0 2001 5 4.990 0.089 1 2001 6 nan nan 0 2001 7 4.940 0.071 1 2001 8 4.995 0.071 2 2001 9 4.957 0.072 2 2001 10 5.020 0.073 1 2001 11 nan nan 0 2001 12 nan nan 0 2002 1 5.110 0.076 1 2002 2 5.081 0.061 3 2002 3 5.120 0.063 1 2002 4 5.112 0.070 2 2002 5 nan nan 0 2002 6 nan nan 0 2002 7 nan nan 0 2002 8 nan nan 0 2002 9 5.120 0.059 1 2002 10 5.180 0.086 2 2002 11 5.310 0.156 2 2002 12 5.270 0.043 1 2003 1 5.326 0.053 2 2003 2 5.306 0.064 2 2003 3 5.391 0.063 3 2003 4 5.430 0.050 1 2003 5 5.379 0.078 2 2003 6 5.399 0.106 2 2003 7 5.431 0.048 2 2003 8 5.430 0.088 1 2003 9 5.414 0.058 3 2003 10 5.470 0.082 1 2003 11 5.455 0.064 3 2003 12 5.553 0.053 2 2004 1 5.554 0.067 2 2004 2 5.598 0.102 2 2004 3 5.570 0.059 2 2004 4 5.590 0.063 2 2004 5 5.630 0.085 2 2004 6 5.663 0.059 2 2004 7 5.642 0.057 2 2004 8 5.605 0.058 2 2004 9 5.613 0.064 2 2004 10 nan nan 0 2004 11 5.737 0.106 2 2004 12 5.766 0.069 2 2005 1 5.791 0.092 2 2005 2 5.732 0.074 2 2005 3 5.740 0.028 1 2005 4 5.795 0.058 2 2005 5 5.792 0.063 3 2005 6 5.890 0.068 1 2005 7 5.849 0.094 2 2005 8 5.826 0.059 2 2005 9 5.885 0.050 2 2005 10 5.831 0.069 3 2005 11 5.892 0.070 2 2005 12 6.040 0.087 1 2006 1 6.040 0.095 1 2006 2 6.036 0.066 2 2006 3 6.014 0.055 2 2006 4 6.032 0.066 3 2006 5 6.110 0.057 2 2006 6 6.065 0.062 2 2006 7 6.045 0.072 2 2006 8 6.086 0.071 2 2006 9 6.079 0.052 2 2006 10 6.116 0.051 2 2006 11 6.164 0.050 2 2006 12 6.175 0.077 2 2007 1 6.203 0.087 2 2007 2 6.222 0.071 2 2007 3 6.240 0.056 2 2007 4 6.315 0.062 2 2007 5 6.324 0.074 2 2007 6 6.333 0.071 2 2007 7 6.338 0.078 2 2007 8 6.400 0.082 1 2007 9 6.407 0.043 2 2007 10 6.479 0.049 2 2007 11 6.480 0.059 2 2007 12 6.478 0.056 2 2008 1 6.547 0.070 2 2008 2 6.554 0.051 2 2008 3 6.609 0.075 3 2008 4 6.550 0.044 1 2008 5 nan nan 0 2008 6 6.652 0.065 3 2008 7 6.666 0.069 3 2008 8 6.740 0.046 1 2008 9 6.643 0.054 2 2008 10 6.776 0.057 2 2008 11 6.797 0.071 2 2008 12 6.864 0.071 2 2009 1 6.820 0.069 2 2009 2 6.841 0.068 2 2009 3 6.825 0.043 2 2009 4 6.868 0.071 2 2009 5 6.908 0.064 2 2009 6 nan nan 0 2009 7 6.984 0.082 2 2009 8 6.995 0.069 2 2009 9 6.949 0.054 2 2009 10 nan nan 0 2009 11 7.041 0.061 2 2009 12 7.000 0.091 1 2010 1 7.088 0.064 2 2010 2 7.069 0.050 2 2010 3 7.144 0.058 2 2010 4 7.160 0.066 2 2010 5 7.200 0.052 2 2010 6 7.169 0.061 2 2010 7 7.258 0.056 2 2010 8 7.212 0.085 2 2010 9 7.220 0.071 2 2010 10 7.279 0.080 2 2010 11 7.301 0.078 2 2010 12 7.379 0.066 2 2011 1 7.340 0.062 2 2011 2 7.393 0.070 2 2011 3 7.401 0.055 2 2011 4 7.410 0.078 2 2011 5 7.436 0.054 2 2011 6 7.437 0.056 2 2011 7 7.483 0.085 2 2011 8 7.537 0.074 2 2011 9 7.572 0.056 2 2011 10 7.514 0.057 2 2011 11 7.664 0.075 2 2011 12 7.677 0.071 2 2012 1 7.660 0.056 1 2012 2 7.723 0.059 3 2012 3 nan nan 0 2012 4 7.686 0.064 2 2012 5 7.759 0.035 3 2012 6 7.640 0.059 1 2012 7 7.769 0.061 2 2012 8 7.772 0.092 2 2012 9 7.807 0.064 2 2012 10 7.825 0.061 2 2012 11 7.891 0.056 2 2012 12 7.897 0.051 2 2013 1 7.957 0.049 2 2013 2 7.980 0.065 1 2013 3 7.980 0.065 1 2013 4 7.993 0.054 2 2013 5 8.080 0.076 2 2013 6 nan nan 0 2013 7 8.056 0.094 2 2013 8 8.140 0.055 1 2013 9 nan nan 0 2013 10 nan nan 0 2013 11 nan nan 0 2013 12 nan nan 0 2014 1 nan nan 0 2014 2 nan nan 0 2014 3 nan nan 0 2014 4 nan nan 0 2014 5 nan nan 0 2014 6 nan nan 0 2014 7 nan nan 0 2014 8 nan nan 0 2014 9 nan nan 0 2014 10 nan nan 0 2014 11 nan nan 0 2014 12 nan nan 0 2015 1 nan nan 0 2015 2 nan nan 0 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 nan nan 0 2015 9 nan nan 0 2015 10 nan nan 0 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 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 nan nan 0 2016 10 nan nan 0 2016 11 nan nan 0 2016 12 nan nan 0