# file: nwr_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: NWR -- Niwot Ridge, Colorado -- 40.05 N, 105.58 W, 3523 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 "nwr_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 # SF6ottoNWRyr SF6ottoNWRmon SF6ottoNWRm SF6ottoNWRsd SF6ottoNWRn 1995 1 nan nan 0 1995 2 nan nan 0 1995 3 3.770 0.270 1 1995 4 nan nan 0 1995 5 3.729 0.277 2 1995 6 3.637 0.188 2 1995 7 3.699 0.103 2 1995 8 3.721 0.395 2 1995 9 3.677 0.107 3 1995 10 3.735 0.070 5 1995 11 3.811 0.086 3 1995 12 3.761 0.071 4 1996 1 3.793 0.070 5 1996 2 3.852 0.076 4 1996 3 3.917 0.068 3 1996 4 3.856 0.091 5 1996 5 3.837 0.090 3 1996 6 3.853 0.073 4 1996 7 3.938 0.096 4 1996 8 3.903 0.048 2 1996 9 3.916 0.105 3 1996 10 3.970 0.096 4 1996 11 3.895 0.069 4 1996 12 4.052 0.092 3 1997 1 3.991 0.084 4 1997 2 4.030 0.070 4 1997 3 4.011 0.083 5 1997 4 4.051 0.085 3 1997 5 4.235 0.122 2 1997 6 4.115 0.072 5 1997 7 4.155 0.135 3 1997 8 4.099 0.077 4 1997 9 4.091 0.045 5 1997 10 4.182 0.074 3 1997 11 4.237 0.075 3 1997 12 4.287 0.079 5 1998 1 4.277 0.062 3 1998 2 4.262 0.080 3 1998 3 4.252 0.064 3 1998 4 4.310 0.055 3 1998 5 4.327 0.106 2 1998 6 4.276 0.097 3 1998 7 4.246 0.068 3 1998 8 4.340 0.085 2 1998 9 4.372 0.057 5 1998 10 4.322 0.046 3 1998 11 4.414 0.076 4 1998 12 4.377 0.059 5 1999 1 4.375 0.062 3 1999 2 4.420 0.071 5 1999 3 4.404 0.074 3 1999 4 4.346 0.106 2 1999 5 4.530 0.070 4 1999 6 4.493 0.070 4 1999 7 4.480 0.073 3 1999 8 4.481 0.065 3 1999 9 4.555 0.092 3 1999 10 4.540 0.075 3 1999 11 4.534 0.065 4 1999 12 4.585 0.064 2 2000 1 4.601 0.058 4 2000 2 4.583 0.068 5 2000 3 4.661 0.060 4 2000 4 4.612 0.057 3 2000 5 4.610 0.064 5 2000 6 4.721 0.070 3 2000 7 4.645 0.074 4 2000 8 4.709 0.077 4 2000 9 4.751 0.048 4 2000 10 4.798 0.046 2 2000 11 4.762 0.046 4 2000 12 4.834 0.079 4 2001 1 4.843 0.054 5 2001 2 4.836 0.061 3 2001 3 4.860 0.058 4 2001 4 4.885 0.045 4 2001 5 4.859 0.058 4 2001 6 4.899 0.074 3 2001 7 4.874 0.044 4 2001 8 4.912 0.052 3 2001 9 4.924 0.041 3 2001 10 4.986 0.077 5 2001 11 4.963 0.057 2 2001 12 5.089 0.075 4 2002 1 5.013 0.061 4 2002 2 5.050 0.071 1 2002 3 5.096 0.063 4 2002 4 5.112 0.042 4 2002 5 5.192 0.056 3 2002 6 5.176 0.082 3 2002 7 5.111 0.051 3 2002 8 5.144 0.053 3 2002 9 5.208 0.067 3 2002 10 5.215 0.083 2 2002 11 5.271 0.065 3 2002 12 5.274 0.080 4 2003 1 5.245 0.053 4 2003 2 5.310 0.030 1 2003 3 5.298 0.051 3 2003 4 5.366 0.057 2 2003 5 5.375 0.071 4 2003 6 5.416 0.066 3 2003 7 5.322 0.065 3 2003 8 5.450 0.086 1 2003 9 5.390 0.060 4 2003 10 5.440 0.052 4 2003 11 5.484 0.054 4 2003 12 5.529 0.077 5 2004 1 5.457 0.092 2 2004 2 5.462 0.074 3 2004 3 5.475 0.059 4 2004 4 5.556 0.064 3 2004 5 5.576 0.080 2 2004 6 5.577 0.071 3 2004 7 5.557 0.076 3 2004 8 5.618 0.085 2 2004 9 5.650 0.060 3 2004 10 5.657 0.081 4 2004 11 5.699 0.069 2 2004 12 5.674 0.087 4 2005 1 5.667 0.079 3 2005 2 5.737 0.033 2 2005 3 5.739 0.052 4 2005 4 5.776 0.049 3 2005 5 5.761 0.079 2 2005 6 nan nan 0 2005 7 5.795 0.045 4 2005 8 5.829 0.051 4 2005 9 5.780 0.066 1 2005 10 5.890 0.063 1 2005 11 5.865 0.052 4 2005 12 5.935 0.061 3 2006 1 5.936 0.056 4 2006 2 5.936 0.072 5 2006 3 5.973 0.063 2 2006 4 5.965 0.050 3 2006 5 6.041 0.064 3 2006 6 5.988 0.058 3 2006 7 6.088 0.064 5 2006 8 6.011 0.035 2 2006 9 6.103 0.052 4 2006 10 6.087 0.058 4 2006 11 6.109 0.035 4 2006 12 6.129 0.066 3 2007 1 6.197 0.067 4 2007 2 6.238 0.055 3 2007 3 6.170 0.068 1 2007 4 6.278 0.063 3 2007 5 6.331 0.049 4 2007 6 6.306 0.092 2 2007 7 6.321 0.046 3 2007 8 6.377 0.049 2 2007 9 6.345 0.051 2 2007 10 6.423 0.058 4 2007 11 6.431 0.081 4 2007 12 6.541 0.127 2 2008 1 6.487 0.092 4 2008 2 6.540 0.075 4 2008 3 6.560 0.075 4 2008 4 6.580 0.083 5 2008 5 6.609 0.058 2 2008 6 6.649 0.053 5 2008 7 6.631 0.065 2 2008 8 6.661 0.076 2 2008 9 6.758 0.072 4 2008 10 6.741 0.069 4 2008 11 6.750 0.076 4 2008 12 6.769 0.065 5 2009 1 6.800 0.112 4 2009 2 6.778 0.077 3 2009 3 6.803 0.051 4 2009 4 6.800 0.051 2 2009 5 6.865 0.078 2 2009 6 6.911 0.063 3 2009 7 6.918 0.056 4 2009 8 6.917 0.081 4 2009 9 6.963 0.055 4 2009 10 7.029 0.054 3 2009 11 6.973 0.052 5 2009 12 7.021 0.042 4 2010 1 7.079 0.042 4 2010 2 7.107 0.062 4 2010 3 7.112 0.053 4 2010 4 7.136 0.059 4 2010 5 7.180 0.053 2 2010 6 7.222 0.042 2 2010 7 7.189 0.077 3 2010 8 7.224 0.045 3 2010 9 7.253 0.062 4 2010 10 7.302 0.088 2 2010 11 7.300 0.080 4 2010 12 7.292 0.053 3 2011 1 7.383 0.040 4 2011 2 7.413 0.070 3 2011 3 7.467 0.054 4 2011 4 7.479 0.059 3 2011 5 7.503 0.075 3 2011 6 7.468 0.059 4 2011 7 7.384 0.067 2 2011 8 7.434 0.095 3 2011 9 7.589 0.055 3 2011 10 7.619 0.061 4 2011 11 7.627 0.058 4 2011 12 7.689 0.065 3 2012 1 7.614 0.082 3 2012 2 7.715 0.047 5 2012 3 7.782 0.055 2 2012 4 7.730 0.059 3 2012 5 7.797 0.072 3 2012 6 7.721 0.065 3 2012 7 7.708 0.061 5 2012 8 7.800 0.062 3 2012 9 7.880 0.075 1 2012 10 7.874 0.050 5 2012 11 7.891 0.060 4 2012 12 7.896 0.059 3 2013 1 7.920 0.056 5 2013 2 8.008 0.071 2 2013 3 7.986 0.062 3 2013 4 8.005 0.057 4 2013 5 8.059 0.065 3 2013 6 8.100 0.115 1 2013 7 8.068 0.056 4 2013 8 8.049 0.086 4 2013 9 8.033 0.094 3 2013 10 nan nan 0 2013 11 8.232 0.040 2 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