# file: nwr_MC_MM.dat # # Atmospheric measurements of CH3CCl3 (Methyl Chloroform, MC) # # 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_MC_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: Methyl Chloroform # data from the NOAA/ESRL halocarbons flask program. # # Calibration scale: NOAA 2003 # 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 MC in ppt # sd Standard deviation of the mean (or single-sample precision value) # n Number of samples # MCottoNWRyr MCottoNWRmon MCottoNWRm MCottoNWRsd MCottoNWRn 1994 1 nan nan 0 1994 2 nan nan 0 1994 3 nan nan 0 1994 4 nan nan 0 1994 5 nan nan 0 1994 6 nan nan 0 1994 7 nan nan 0 1994 8 nan nan 0 1994 9 nan nan 0 1994 10 nan nan 0 1994 11 117.020 0.790 1 1994 12 nan nan 0 1995 1 nan nan 0 1995 2 110.870 1.619 2 1995 3 110.980 0.986 1 1995 4 110.683 1.427 4 1995 5 106.930 0.546 1 1995 6 nan nan 0 1995 7 nan nan 0 1995 8 104.340 1.669 1 1995 9 102.258 1.504 3 1995 10 104.535 1.634 4 1995 11 104.060 0.848 1 1995 12 101.145 1.867 3 1996 1 100.686 2.546 4 1996 2 101.141 2.531 4 1996 3 100.556 0.898 2 1996 4 95.760 1.291 1 1996 5 96.439 0.614 4 1996 6 90.943 1.855 4 1996 7 91.087 2.703 5 1996 8 88.238 0.696 2 1996 9 87.896 0.811 3 1996 10 86.859 0.715 4 1996 11 85.286 1.204 4 1996 12 84.203 1.356 3 1997 1 85.530 0.738 4 1997 2 84.309 0.995 4 1997 3 83.532 1.162 5 1997 4 82.213 0.773 3 1997 5 80.391 0.776 2 1997 6 80.221 2.548 5 1997 7 77.346 0.506 3 1997 8 74.485 0.771 4 1997 9 74.512 0.559 5 1997 10 73.291 0.458 3 1997 11 73.864 0.520 3 1997 12 73.556 0.863 5 1998 1 72.948 1.497 3 1998 2 71.131 2.147 4 1998 3 69.633 0.969 3 1998 4 69.879 0.650 3 1998 5 69.223 1.322 2 1998 6 66.443 0.673 3 1998 7 64.992 0.405 2 1998 8 63.578 0.593 3 1998 9 61.387 1.075 3 1998 10 60.786 0.684 3 1998 11 60.575 0.624 4 1998 12 59.896 0.251 4 1999 1 59.702 0.435 3 1999 2 59.452 0.413 5 1999 3 57.755 1.020 3 1999 4 56.355 0.587 2 1999 5 56.747 1.188 4 1999 6 54.939 0.317 4 1999 7 53.402 0.478 3 1999 8 51.962 0.344 3 1999 9 51.951 0.297 3 1999 10 51.386 0.466 3 1999 11 50.841 0.674 5 1999 12 50.580 0.433 1 2000 1 49.884 0.330 4 2000 2 49.898 0.272 5 2000 3 49.154 0.421 4 2000 4 48.034 0.318 2 2000 5 46.377 0.662 5 2000 6 46.162 0.293 3 2000 7 44.381 0.232 4 2000 8 43.677 0.537 4 2000 9 43.147 0.273 4 2000 10 42.745 0.209 2 2000 11 42.647 0.261 4 2000 12 42.511 0.186 4 2001 1 41.986 0.181 5 2001 2 40.990 0.231 3 2001 3 40.798 0.411 4 2001 4 40.067 0.866 4 2001 5 39.392 0.445 3 2001 6 38.695 0.860 3 2001 7 37.059 0.614 4 2001 8 36.693 0.460 3 2001 9 36.506 0.312 3 2001 10 36.133 0.231 3 2001 11 35.909 0.269 2 2001 12 35.974 0.188 4 2002 1 35.528 0.534 3 2002 2 35.164 0.345 2 2002 3 34.860 0.171 4 2002 4 33.886 0.398 3 2002 5 33.741 0.218 3 2002 6 32.725 0.436 3 2002 7 31.788 0.223 3 2002 8 31.412 0.312 3 2002 9 30.868 0.276 2 2002 10 30.520 0.245 1 2002 11 30.702 0.221 2 2002 12 30.368 0.277 3 2003 1 29.653 0.241 4 2003 2 29.680 0.197 1 2003 3 29.298 0.653 3 2003 4 28.221 0.834 2 2003 5 28.322 0.534 4 2003 6 27.732 0.389 2 2003 7 26.588 0.173 3 2003 8 26.670 0.246 1 2003 9 26.166 0.213 3 2003 10 25.930 0.264 4 2003 11 25.643 0.250 3 2003 12 25.635 0.236 5 2004 1 25.234 0.255 2 2004 2 25.335 0.303 3 2004 3 24.532 0.391 4 2004 4 24.481 0.630 3 2004 5 24.055 0.375 2 2004 6 23.363 0.240 3 2004 7 22.629 0.321 3 2004 8 22.325 0.146 2 2004 9 21.816 0.223 3 2004 10 21.389 0.321 4 2004 11 21.442 0.247 2 2004 12 21.023 0.276 4 2005 1 20.879 0.310 3 2005 2 20.781 0.221 3 2005 3 20.676 0.249 4 2005 4 20.280 0.237 3 2005 5 19.754 0.169 3 2005 6 nan nan 0 2005 7 18.896 0.366 4 2005 8 18.405 0.195 4 2005 9 17.690 0.239 1 2005 10 17.930 0.213 1 2005 11 17.846 0.149 4 2005 12 18.086 0.201 4 2006 1 17.677 0.266 4 2006 2 17.445 0.274 4 2006 3 17.357 0.318 2 2006 4 17.117 0.222 4 2006 5 16.473 0.381 3 2006 6 15.847 0.163 3 2006 7 15.390 0.222 5 2006 8 15.000 0.203 2 2006 9 15.218 0.190 4 2006 10 15.054 0.176 4 2006 11 14.956 0.227 4 2006 12 14.985 0.241 3 2007 1 14.645 0.167 4 2007 2 14.530 0.254 3 2007 3 14.036 0.280 2 2007 4 14.463 0.123 3 2007 5 14.074 0.198 4 2007 6 13.557 0.240 2 2007 7 13.089 0.140 3 2007 8 12.701 0.132 2 2007 9 12.682 0.269 2 2007 10 12.518 0.299 4 2007 11 12.448 0.197 4 2007 12 12.712 0.225 2 2008 1 12.587 0.170 4 2008 2 12.445 0.212 4 2008 3 12.201 0.272 4 2008 4 11.981 0.255 5 2008 5 11.562 0.190 2 2008 6 11.315 0.201 5 2008 7 11.133 0.170 2 2008 8 10.855 0.226 2 2008 9 10.785 0.225 4 2008 10 10.725 0.282 3 2008 11 10.673 0.245 4 2008 12 10.516 0.224 5 2009 1 10.379 0.205 4 2009 2 10.512 0.460 2 2009 3 10.204 0.197 4 2009 4 9.916 0.253 2 2009 5 9.807 0.204 2 2009 6 9.559 0.241 3 2009 7 9.236 0.162 4 2009 8 9.083 0.185 4 2009 9 8.977 0.127 4 2009 10 9.036 0.212 3 2009 11 8.878 0.217 5 2009 12 8.927 0.143 4 2010 1 8.779 0.178 4 2010 2 8.702 0.192 3 2010 3 8.482 0.155 4 2010 4 8.410 0.184 3 2010 5 8.289 0.175 2 2010 6 7.964 0.201 2 2010 7 7.863 0.226 3 2010 8 7.571 0.177 3 2010 9 7.570 0.167 3 2010 10 7.529 0.332 2 2010 11 7.549 0.189 4 2010 12 7.253 0.241 3 2011 1 7.379 0.126 4 2011 2 7.224 0.212 4 2011 3 7.298 0.180 3 2011 4 7.122 0.175 3 2011 5 7.273 0.164 3 2011 6 6.883 0.202 4 2011 7 6.736 0.146 2 2011 8 6.416 0.147 3 2011 9 6.386 0.140 3 2011 10 6.380 0.159 4 2011 11 6.391 0.207 3 2011 12 6.238 0.211 3 2012 1 6.220 0.258 1 2012 2 6.173 0.211 5 2012 3 6.252 0.320 2 2012 4 5.743 0.178 3 2012 5 5.759 0.166 3 2012 6 5.734 0.143 3 2012 7 5.568 0.132 5 2012 8 5.183 0.168 3 2012 9 5.210 0.122 1 2012 10 5.253 0.191 5 2012 11 5.165 0.188 4 2012 12 5.333 0.204 3 2013 1 5.159 0.173 3 2013 2 5.298 0.226 2 2013 3 5.052 0.141 3 2013 4 4.990 0.162 4 2013 5 4.782 0.175 3 2013 6 nan nan 0 2013 7 4.694 0.179 4 2013 8 4.653 0.281 4 2013 9 4.321 0.428 3 2013 10 4.420 0.183 1 2013 11 4.352 0.157 3 2013 12 4.338 0.174 5 2014 1 4.250 0.382 1 2014 2 4.176 0.180 4 2014 3 3.958 0.166 3 2014 4 3.990 0.207 1 2014 5 4.329 0.213 3 2014 6 3.870 0.240 4 2014 7 3.988 0.174 3 2014 8 3.916 0.170 3 2014 9 3.816 0.150 5 2014 10 3.711 0.132 3 2014 11 3.680 0.229 1 2014 12 3.736 0.187 5 2015 1 3.564 0.169 4 2015 2 3.587 0.191 4 2015 3 3.515 0.186 2 2015 4 3.546 0.173 4 2015 5 3.441 0.271 2 2015 6 3.439 0.157 5 2015 7 3.247 0.147 4 2015 8 3.308 0.149 3 2015 9 3.232 0.170 4 2015 10 3.219 0.197 3 2015 11 3.083 0.201 4 2015 12 3.014 0.230 4 2016 1 2.949 0.160 4 2016 2 3.098 0.170 4 2016 3 2.931 0.142 3 2016 4 2.827 0.233 2 2016 5 2.963 0.109 3 2016 6 2.793 0.151 4 2016 7 2.580 0.147 1 2016 8 2.655 0.146 3 2016 9 2.694 0.182 4 2016 10 2.677 0.177 4 2016 11 2.673 0.230 3 2016 12 2.655 0.168 4 2017 1 2.705 0.156 3 2017 2 2.657 0.170 4 2017 3 2.615 0.088 3 2017 4 2.575 0.193 2 2017 5 2.457 0.152 4 2017 6 2.395 0.139 3 2017 7 2.290 0.195 1 2017 8 2.307 0.160 3 2017 9 2.338 0.107 4 2017 10 2.301 0.181 3 2017 11 2.260 0.213 3 2017 12 2.198 0.110 4 2018 1 2.261 0.106 5 2018 2 2.275 0.124 4 2018 3 2.252 0.113 2 2018 4 2.248 0.172 3 2018 5 2.390 0.225 1 2018 6 2.165 0.212 2 2018 7 nan nan 0 2018 8 2.075 0.192 2 2018 9 2.124 0.198 3 2018 10 nan nan 0 2018 11 nan nan 0 2018 12 nan nan 0 2019 1 nan nan 0 2019 2 nan nan 0 2019 3 nan nan 0 2019 4 nan nan 0 2019 5 nan nan 0 2019 6 nan nan 0 2019 7 nan nan 0 2019 8 nan nan 0 2019 9 nan nan 0 2019 10 nan nan 0 2019 11 nan nan 0 2019 12 nan nan 0