# file: alt_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: ALT -- Alert, Canada -- 82.45 N, 62.51 W, 200 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 "alt_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 # SF6ottoALTyr SF6ottoALTmon SF6ottoALTm SF6ottoALTsd SF6ottoALTn 1995 1 3.640 0.233 1 1995 2 nan nan 0 1995 3 3.600 0.270 1 1995 4 3.670 0.306 2 1995 5 3.670 0.213 1 1995 6 3.616 0.166 2 1995 7 3.640 0.298 1 1995 8 3.747 0.308 2 1995 9 3.811 0.073 3 1995 10 3.786 0.073 2 1995 11 3.865 0.078 4 1995 12 3.897 0.102 2 1996 1 3.840 0.086 3 1996 2 3.910 0.081 5 1996 3 nan nan 0 1996 4 3.903 0.090 2 1996 5 3.921 0.064 4 1996 6 3.961 0.104 3 1996 7 3.866 0.095 3 1996 8 3.929 0.078 4 1996 9 4.050 0.102 1 1996 10 4.016 0.076 3 1996 11 3.974 0.083 3 1996 12 nan nan 0 1997 1 4.077 0.078 2 1997 2 4.095 0.089 4 1997 3 4.110 0.114 2 1997 4 4.220 0.188 1 1997 5 4.080 0.094 1 1997 6 4.121 0.054 4 1997 7 4.145 0.086 2 1997 8 nan nan 0 1997 9 nan nan 0 1997 10 4.157 0.056 3 1997 11 nan nan 0 1997 12 4.295 0.081 2 1998 1 4.285 0.055 3 1998 2 4.270 0.042 1 1998 3 4.260 0.100 1 1998 4 4.296 0.048 3 1998 5 4.332 0.071 2 1998 6 4.327 0.063 2 1998 7 4.326 0.069 3 1998 8 4.395 0.062 3 1998 9 4.339 0.065 5 1998 10 4.402 0.074 3 1998 11 4.425 0.052 4 1998 12 4.445 0.065 3 1999 1 4.518 0.093 2 1999 2 4.497 0.060 4 1999 3 4.506 0.090 3 1999 4 4.490 0.074 1 1999 5 4.516 0.056 4 1999 6 4.552 0.072 3 1999 7 4.491 0.060 4 1999 8 4.491 0.086 2 1999 9 4.503 0.080 3 1999 10 4.591 0.063 4 1999 11 4.588 0.039 3 1999 12 nan nan 0 2000 1 4.652 0.073 4 2000 2 4.663 0.054 3 2000 3 4.651 0.052 3 2000 4 4.686 0.042 3 2000 5 4.671 0.075 4 2000 6 4.740 0.057 1 2000 7 4.732 0.054 4 2000 8 4.751 0.046 4 2000 9 4.760 0.061 1 2000 10 nan nan 0 2000 11 4.817 0.048 4 2000 12 4.856 0.045 3 2001 1 nan nan 0 2001 2 4.884 0.064 4 2001 3 4.938 0.050 3 2001 4 4.900 0.059 1 2001 5 4.927 0.061 5 2001 6 4.974 0.052 4 2001 7 4.965 0.058 4 2001 8 4.939 0.067 5 2001 9 4.966 0.052 3 2001 10 4.954 0.041 4 2001 11 5.069 0.056 4 2001 12 5.035 0.057 4 2002 1 5.099 0.072 4 2002 2 5.082 0.065 2 2002 3 5.107 0.060 4 2002 4 5.121 0.044 4 2002 5 5.103 0.067 4 2002 6 5.140 0.078 4 2002 7 5.184 0.045 5 2002 8 5.225 0.049 3 2002 9 5.214 0.051 4 2002 10 5.199 0.061 5 2002 11 5.252 0.073 4 2002 12 5.263 0.057 4 2003 1 5.313 0.062 3 2003 2 5.338 0.064 4 2003 3 5.318 0.061 2 2003 4 5.368 0.070 5 2003 5 5.375 0.056 4 2003 6 5.432 0.066 4 2003 7 5.420 0.060 5 2003 8 5.418 0.069 4 2003 9 5.391 0.050 4 2003 10 5.451 0.048 5 2003 11 5.488 0.064 4 2003 12 5.543 0.058 3 2004 1 5.549 0.065 5 2004 2 5.544 0.055 4 2004 3 5.550 0.063 4 2004 4 5.539 0.049 4 2004 5 5.553 0.070 3 2004 6 5.580 0.060 5 2004 7 5.594 0.058 4 2004 8 5.613 0.059 3 2004 9 5.571 0.081 4 2004 10 5.631 0.056 4 2004 11 5.678 0.037 4 2004 12 5.728 0.040 4 2005 1 5.741 0.051 5 2005 2 5.749 0.042 5 2005 3 5.758 0.060 4 2005 4 5.766 0.046 4 2005 5 5.800 0.066 4 2005 6 5.801 0.061 5 2005 7 5.858 0.059 4 2005 8 5.827 0.057 5 2005 9 5.843 0.071 4 2005 10 5.855 0.059 4 2005 11 5.940 0.062 4 2005 12 5.958 0.058 4 2006 1 5.953 0.060 4 2006 2 5.968 0.059 5 2006 3 6.000 0.059 4 2006 4 6.023 0.061 4 2006 5 6.055 0.044 5 2006 6 6.046 0.049 4 2006 7 6.084 0.061 4 2006 8 6.077 0.048 4 2006 9 6.082 0.048 4 2006 10 6.092 0.041 4 2006 11 6.175 0.049 5 2006 12 6.194 0.053 4 2007 1 6.216 0.048 4 2007 2 6.218 0.062 4 2007 3 6.278 0.066 4 2007 4 6.312 0.049 4 2007 5 6.276 0.067 5 2007 6 6.321 0.049 4 2007 7 6.350 0.046 4 2007 8 6.372 0.058 4 2007 9 6.396 0.046 4 2007 10 6.385 0.057 4 2007 11 6.418 0.070 4 2007 12 6.511 0.060 4 2008 1 6.521 0.049 5 2008 2 6.545 0.051 3 2008 3 6.552 0.062 4 2008 4 6.592 0.046 4 2008 5 6.585 0.063 4 2008 6 6.632 0.070 4 2008 7 6.698 0.068 5 2008 8 6.651 0.051 4 2008 9 6.632 0.077 3 2008 10 6.693 0.081 5 2008 11 6.782 0.060 4 2008 12 6.834 0.044 5 2009 1 6.821 0.034 3 2009 2 6.857 0.055 4 2009 3 6.850 0.049 4 2009 4 6.875 0.069 4 2009 5 6.934 0.053 4 2009 6 6.905 0.065 5 2009 7 6.930 0.051 4 2009 8 6.956 0.064 4 2009 9 6.909 0.047 4 2009 10 6.989 0.051 4 2009 11 7.047 0.091 4 2009 12 7.078 0.046 5 2010 1 7.053 0.057 3 2010 2 7.118 0.046 4 2010 3 7.140 0.061 5 2010 4 7.174 0.040 4 2010 5 7.205 0.047 4 2010 6 7.216 0.058 5 2010 7 7.245 0.061 4 2010 8 7.237 0.083 3 2010 9 7.225 0.050 4 2010 10 7.267 0.070 4 2010 11 7.314 0.053 3 2010 12 7.368 0.050 5 2011 1 7.388 0.055 4 2011 2 7.375 0.063 4 2011 3 7.409 0.057 5 2011 4 7.406 0.053 4 2011 5 7.439 0.068 5 2011 6 7.469 0.058 4 2011 7 nan nan 0 2011 8 7.542 0.076 2 2011 9 7.541 0.049 5 2011 10 7.582 0.051 4 2011 11 7.637 0.070 4 2011 12 7.671 0.056 5 2012 1 7.667 0.046 4 2012 2 7.724 0.053 4 2012 3 7.656 0.050 5 2012 4 7.718 0.041 4 2012 5 7.748 0.055 4 2012 6 7.744 0.049 4 2012 7 7.780 0.072 4 2012 8 7.772 0.056 5 2012 9 7.791 0.057 4 2012 10 7.811 0.047 4 2012 11 7.839 0.044 4 2012 12 7.927 0.066 4 2013 1 7.987 0.046 5 2013 2 7.973 0.055 4 2013 3 7.976 0.051 4 2013 4 8.066 0.072 2 2013 5 8.044 0.040 4 2013 6 8.099 0.066 4 2013 7 8.111 0.065 4 2013 8 8.167 0.077 3 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