# file: hfm_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: HFM -- Harvard Forest, Massachusetts -- 42.54 N, 72.17 W, 340 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 "hfm_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 # SF6ottoHFMyr SF6ottoHFMmon SF6ottoHFMm SF6ottoHFMsd SF6ottoHFMn 1995 1 nan nan 0 1995 2 nan nan 0 1995 3 nan nan 0 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 4.030 0.159 1 1995 10 nan nan 0 1995 11 4.132 0.082 2 1995 12 nan nan 0 1996 1 4.030 0.079 1 1996 2 4.240 0.235 1 1996 3 nan nan 0 1996 4 5.290 0.488 2 1996 5 5.870 0.111 1 1996 6 4.170 0.262 2 1996 7 nan nan 0 1996 8 5.140 0.143 1 1996 9 3.986 0.160 3 1996 10 4.020 0.090 1 1996 11 4.111 0.177 2 1996 12 nan nan 0 1997 1 4.182 0.156 2 1997 2 4.110 0.084 1 1997 3 4.790 0.078 1 1997 4 4.030 0.112 1 1997 5 4.291 0.126 2 1997 6 4.130 0.163 1 1997 7 4.120 0.067 1 1997 8 4.403 0.094 2 1997 9 4.670 0.077 1 1997 10 4.972 0.559 2 1997 11 nan nan 0 1997 12 5.560 0.820 2 1998 1 7.750 0.060 1 1998 2 4.373 0.062 2 1998 3 nan nan 0 1998 4 4.380 0.072 1 1998 5 4.500 0.081 1 1998 6 5.710 0.061 1 1998 7 5.528 1.231 3 1998 8 4.804 0.424 2 1998 9 5.415 1.350 3 1998 10 4.483 0.065 2 1998 11 4.690 0.082 1 1998 12 4.830 0.067 1 1999 1 4.578 0.084 2 1999 2 4.795 0.699 3 1999 3 4.630 0.097 1 1999 4 4.700 0.157 1 1999 5 4.792 0.233 3 1999 6 4.540 0.116 1 1999 7 5.340 0.096 1 1999 8 nan nan 0 1999 9 4.770 0.123 1 1999 10 nan nan 0 1999 11 5.304 0.361 2 1999 12 5.006 0.279 3 2000 1 4.840 0.070 1 2000 2 4.753 0.087 4 2000 3 4.975 0.276 2 2000 4 4.750 0.084 1 2000 5 4.856 0.048 3 2000 6 4.852 0.063 2 2000 7 4.911 0.198 2 2000 8 4.792 0.050 2 2000 9 4.950 0.177 2 2000 10 4.910 0.060 1 2000 11 5.740 0.778 2 2000 12 4.870 0.067 1 2001 1 5.888 1.308 2 2001 2 5.031 0.092 2 2001 3 4.920 0.059 1 2001 4 5.086 0.057 2 2001 5 5.210 0.255 2 2001 6 5.399 0.231 3 2001 7 5.026 0.099 2 2001 8 5.170 0.085 1 2001 9 4.980 0.045 1 2001 10 5.598 0.435 3 2001 11 5.778 0.622 2 2001 12 5.685 0.226 2 2002 1 5.181 0.099 2 2002 2 6.465 1.386 2 2002 3 5.252 0.071 2 2002 4 5.549 0.790 4 2002 5 5.754 0.092 2 2002 6 5.904 0.523 2 2002 7 5.338 0.256 3 2002 8 6.420 1.188 2 2002 9 5.217 0.099 2 2002 10 5.375 0.153 3 2002 11 5.850 0.042 1 2002 12 5.616 0.353 2 2003 1 6.632 1.025 2 2003 2 5.505 0.113 2 2003 3 6.255 0.106 2 2003 4 6.315 1.103 2 2003 5 5.522 0.130 4 2003 6 5.819 0.252 6 2003 7 5.870 0.062 1 2003 8 5.814 0.325 2 2003 9 5.440 0.067 1 2003 10 5.726 0.317 3 2003 11 5.829 0.389 2 2003 12 5.770 0.064 1 2004 1 7.170 0.050 1 2004 2 5.671 0.177 2 2004 3 5.766 0.170 2 2004 4 5.693 0.072 2 2004 5 5.966 0.067 2 2004 6 5.670 0.093 1 2004 7 5.710 0.128 1 2004 8 5.830 0.118 1 2004 9 5.891 0.410 2 2004 10 5.809 0.306 3 2004 11 5.834 0.071 2 2004 12 nan nan 0 2005 1 5.831 0.047 2 2005 2 6.319 1.240 3 2005 3 5.867 0.066 2 2005 4 5.860 0.075 4 2005 5 5.928 0.119 5 2005 6 6.091 0.375 3 2005 7 5.977 0.075 2 2005 8 6.029 0.195 3 2005 9 6.443 0.904 3 2005 10 6.460 0.060 1 2005 11 6.000 0.063 1 2005 12 6.020 0.099 1 2006 1 7.135 1.457 2 2006 2 7.800 0.076 1 2006 3 6.172 0.297 2 2006 4 6.100 0.059 1 2006 5 6.869 1.520 5 2006 6 6.537 0.674 4 2006 7 6.289 0.411 4 2006 8 6.125 0.068 4 2006 9 6.507 0.535 4 2006 10 6.353 0.204 5 2006 11 6.327 0.317 4 2006 12 6.565 0.451 4 2007 1 6.379 0.148 4 2007 2 6.267 0.080 5 2007 3 6.276 0.092 3 2007 4 6.326 0.067 5 2007 5 6.404 0.239 4 2007 6 6.441 0.074 4 2007 7 6.779 0.334 4 2007 8 6.563 0.175 3 2007 9 6.514 0.423 3 2007 10 6.858 0.907 4 2007 11 6.621 0.196 3 2007 12 6.490 0.056 2 2008 1 6.651 0.118 4 2008 2 6.691 0.089 3 2008 3 6.693 0.222 3 2008 4 6.610 0.057 5 2008 5 6.646 0.058 4 2008 6 6.763 0.129 3 2008 7 6.683 0.060 4 2008 8 6.824 0.175 3 2008 9 6.816 0.159 4 2008 10 7.011 0.283 5 2008 11 6.842 0.054 3 2008 12 7.140 0.403 2 2009 1 7.080 0.163 4 2009 2 6.890 0.056 4 2009 3 6.892 0.055 5 2009 4 7.018 0.186 4 2009 5 6.984 0.072 4 2009 6 7.000 0.101 4 2009 7 7.015 0.111 5 2009 8 7.070 0.117 4 2009 9 7.005 0.065 5 2009 10 7.037 0.057 4 2009 11 7.078 0.056 3 2009 12 7.051 0.047 3 2010 1 7.173 0.143 4 2010 2 7.264 0.262 4 2010 3 7.180 0.069 4 2010 4 7.291 0.061 3 2010 5 7.201 0.058 4 2010 6 7.289 0.122 4 2010 7 7.319 0.214 4 2010 8 7.455 0.217 3 2010 9 7.447 0.386 3 2010 10 7.330 0.070 4 2010 11 7.461 0.235 5 2010 12 7.398 0.059 3 2011 1 7.548 0.107 3 2011 2 7.419 0.056 4 2011 3 7.520 0.107 3 2011 4 7.522 0.113 4 2011 5 7.464 0.060 3 2011 6 7.503 0.083 4 2011 7 7.517 0.053 3 2011 8 7.529 0.061 4 2011 9 7.687 0.209 5 2011 10 7.847 0.348 4 2011 11 7.757 0.095 5 2011 12 7.814 0.071 2 2012 1 7.702 0.044 4 2012 2 7.915 0.217 3 2012 3 7.808 0.257 3 2012 4 7.749 0.049 5 2012 5 7.823 0.076 4 2012 6 7.823 0.104 2 2012 7 7.799 0.058 4 2012 8 7.790 0.069 3 2012 9 7.797 0.065 3 2012 10 7.883 0.060 3 2012 11 8.019 0.082 3 2012 12 8.017 0.053 2 2013 1 8.438 0.396 2 2013 2 7.978 0.062 4 2013 3 8.034 0.065 2 2013 4 8.188 0.116 4 2013 5 8.138 0.148 2 2013 6 8.100 0.063 1 2013 7 8.207 0.137 4 2013 8 8.210 0.162 4 2013 9 nan nan 0 2013 10 8.378 0.382 2 2013 11 8.130 0.083 1 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