# file: cgo_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: CGO -- Cape Grim, Tasmania -- 40.68 S, 144.69 E, 94 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 "cgo_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 # MCottoCGOyr MCottoCGOmon MCottoCGOm MCottoCGOsd MCottoCGOn 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 nan nan 0 1995 10 97.048 0.891 2 1995 11 96.107 0.764 2 1995 12 nan nan 0 1996 1 92.120 3.901 1 1996 2 90.623 0.620 3 1996 3 89.936 0.732 4 1996 4 89.995 0.688 2 1996 5 89.590 0.762 4 1996 6 86.653 0.762 3 1996 7 87.081 0.992 3 1996 8 86.485 0.617 4 1996 9 85.275 0.511 4 1996 10 83.819 0.663 3 1996 11 82.499 0.678 2 1996 12 81.890 0.517 1 1997 1 81.218 0.643 2 1997 2 78.959 0.567 2 1997 3 77.987 0.534 5 1997 4 77.030 0.619 1 1997 5 76.909 0.380 4 1997 6 75.804 0.474 2 1997 7 75.682 0.537 5 1997 8 75.417 0.664 2 1997 9 74.226 0.570 3 1997 10 nan nan 0 1997 11 72.154 0.744 4 1997 12 71.239 0.851 4 1998 1 69.772 0.790 2 1998 2 68.870 0.653 3 1998 3 67.300 0.597 5 1998 4 66.581 0.618 4 1998 5 65.894 0.552 3 1998 6 65.585 0.772 4 1998 7 65.281 0.353 2 1998 8 64.560 0.544 1 1998 9 62.755 0.406 2 1998 10 61.906 0.380 5 1998 11 61.443 0.777 5 1998 12 59.666 0.721 2 1999 1 58.424 0.360 2 1999 2 57.334 0.375 3 1999 3 56.382 0.291 5 1999 4 55.953 0.473 4 1999 5 54.862 0.380 4 1999 6 54.707 0.334 4 1999 7 54.082 0.253 3 1999 8 53.732 0.259 3 1999 9 53.172 0.501 5 1999 10 52.470 0.284 6 1999 11 52.166 0.298 3 1999 12 50.505 0.587 2 2000 1 49.600 0.253 1 2000 2 48.485 0.361 3 2000 3 47.854 0.398 4 2000 4 46.758 0.728 3 2000 5 45.864 0.366 4 2000 6 45.605 0.251 4 2000 7 45.273 0.274 4 2000 8 44.606 0.444 4 2000 9 43.960 0.201 4 2000 10 43.812 0.290 4 2000 11 42.799 0.184 4 2000 12 42.533 0.225 3 2001 1 41.118 0.325 4 2001 2 40.020 0.194 3 2001 3 39.488 0.206 3 2001 4 39.121 0.260 3 2001 5 38.907 0.474 2 2001 6 38.236 0.189 4 2001 7 37.984 0.273 3 2001 8 37.705 0.211 3 2001 9 37.320 0.286 4 2001 10 36.809 0.170 4 2001 11 35.948 0.302 3 2001 12 35.519 0.226 2 2002 1 34.771 0.468 5 2002 2 34.149 0.193 4 2002 3 33.654 0.248 4 2002 4 33.348 0.235 2 2002 5 32.882 0.225 3 2002 6 32.361 0.177 5 2002 7 32.274 0.308 3 2002 8 32.097 0.276 4 2002 9 31.646 0.200 2 2002 10 30.922 0.263 5 2002 11 30.743 0.188 4 2002 12 30.383 0.223 5 2003 1 29.302 0.324 5 2003 2 28.673 0.192 4 2003 3 28.136 0.278 4 2003 4 27.744 0.296 3 2003 5 27.475 0.296 4 2003 6 27.293 0.225 3 2003 7 27.028 0.206 3 2003 8 26.862 0.157 4 2003 9 26.494 0.230 4 2003 10 26.346 0.168 3 2003 11 25.724 0.267 5 2003 12 25.370 0.285 3 2004 1 25.130 0.308 3 2004 2 24.473 0.179 6 2004 3 23.668 0.305 6 2004 4 23.682 0.164 3 2004 5 23.522 0.296 6 2004 6 23.198 0.184 6 2004 7 22.979 0.164 6 2004 8 22.744 0.236 3 2004 9 21.971 0.102 6 2004 10 21.632 0.309 5 2004 11 21.259 0.148 5 2004 12 20.754 0.190 5 2005 1 20.314 0.310 5 2005 2 20.103 0.203 5 2005 3 19.682 0.179 3 2005 4 19.417 0.223 5 2005 5 19.337 0.120 5 2005 6 18.948 0.149 2 2005 7 18.932 0.194 3 2005 8 18.875 0.265 5 2005 9 18.478 0.227 3 2005 10 18.513 0.198 3 2005 11 17.942 0.198 2 2005 12 17.784 0.192 5 2006 1 17.186 0.361 3 2006 2 16.865 0.182 4 2006 3 16.500 0.321 4 2006 4 16.422 0.198 4 2006 5 16.023 0.125 2 2006 6 15.992 0.185 3 2006 7 15.792 0.188 4 2006 8 15.555 0.252 3 2006 9 15.506 0.164 5 2006 10 15.338 0.230 4 2006 11 14.892 0.181 4 2006 12 14.675 0.355 3 2007 1 14.303 0.122 4 2007 2 14.153 0.502 2 2007 3 13.935 0.211 4 2007 4 nan nan 0 2007 5 13.502 0.150 4 2007 6 13.267 0.181 3 2007 7 13.197 0.195 4 2007 8 13.067 0.146 4 2007 9 13.031 0.128 5 2007 10 12.711 0.174 4 2007 11 12.675 0.247 2 2007 12 12.487 0.198 4 2008 1 12.011 0.259 4 2008 2 11.846 0.177 5 2008 3 11.731 0.230 4 2008 4 11.361 0.200 2 2008 5 11.397 0.162 2 2008 6 11.294 0.208 3 2008 7 11.232 0.115 7 2008 8 11.247 0.201 3 2008 9 11.106 0.172 4 2008 10 10.865 0.296 5 2008 11 10.693 0.210 4 2008 12 10.448 0.204 5 2009 1 10.360 0.237 2 2009 2 10.121 0.313 2 2009 3 9.930 0.175 4 2009 4 9.758 0.132 5 2009 5 9.684 0.192 3 2009 6 9.566 0.185 3 2009 7 9.520 0.154 3 2009 8 9.473 0.139 5 2009 9 9.310 0.147 3 2009 10 9.250 0.247 1 2009 11 8.850 0.175 4 2009 12 8.892 0.150 4 2010 1 8.623 0.203 4 2010 2 8.328 0.167 2 2010 3 8.344 0.177 3 2010 4 8.139 0.120 2 2010 5 8.191 0.127 3 2010 6 8.020 0.177 3 2010 7 7.883 0.142 3 2010 8 7.827 0.130 7 2010 9 7.702 0.163 4 2010 10 7.715 0.201 2 2010 11 7.553 0.205 3 2010 12 7.590 0.191 3 2011 1 7.305 0.223 3 2011 2 7.029 0.210 3 2011 3 7.085 0.200 4 2011 4 6.833 0.201 2 2011 5 6.908 0.189 4 2011 6 6.834 0.195 3 2011 7 6.735 0.127 2 2011 8 6.798 0.158 2 2011 9 6.644 0.167 3 2011 10 6.509 0.218 2 2011 11 6.567 0.155 4 2011 12 6.370 0.265 1 2012 1 nan nan 0 2012 2 5.991 0.282 2 2012 3 5.909 0.147 3 2012 4 5.686 0.113 2 2012 5 5.725 0.129 2 2012 6 5.747 0.126 4 2012 7 5.754 0.143 3 2012 8 5.664 0.181 5 2012 9 5.636 0.175 4 2012 10 nan nan 0 2012 11 5.349 0.159 2 2012 12 5.274 0.311 2 2013 1 5.006 0.143 3 2013 2 5.019 0.263 4 2013 3 4.814 0.212 2 2013 4 4.762 0.227 2 2013 5 4.790 0.175 1 2013 6 nan nan 0 2013 7 nan nan 0 2013 8 4.784 0.326 3 2013 9 4.715 0.184 2 2013 10 4.450 0.228 2 2013 11 4.340 0.274 1 2013 12 4.434 0.238 3 2014 1 4.011 0.220 2 2014 2 3.665 0.204 2 2014 3 3.866 0.111 4 2014 4 4.040 0.256 1 2014 5 3.990 0.286 1 2014 6 4.013 0.211 3 2014 7 4.099 0.199 2 2014 8 3.960 0.211 1 2014 9 3.943 0.191 3 2014 10 3.832 0.183 2 2014 11 3.753 0.231 3 2014 12 3.643 0.199 3 2015 1 3.710 0.215 1 2015 2 3.474 0.185 2 2015 3 3.438 0.204 4 2015 4 3.442 0.182 2 2015 5 3.457 0.159 2 2015 6 3.438 0.215 3 2015 7 3.396 0.133 2 2015 8 3.305 0.127 2 2015 9 3.314 0.177 4 2015 10 3.270 0.220 1 2015 11 3.080 0.216 2 2015 12 3.022 0.191 4 2016 1 2.929 0.169 3 2016 2 2.949 0.188 2 2016 3 2.842 0.165 3 2016 4 2.862 0.161 2 2016 5 2.823 0.142 3 2016 6 2.835 0.122 3 2016 7 2.861 0.165 3 2016 8 2.820 0.211 2 2016 9 2.710 0.163 1 2016 10 2.766 0.177 4 2016 11 2.706 0.185 2 2016 12 2.737 0.169 2 2017 1 2.617 0.105 2 2017 2 2.533 0.169 2 2017 3 nan nan 0 2017 4 2.520 0.142 5 2017 5 2.426 0.074 2 2017 6 2.397 0.124 3 2017 7 2.402 0.161 4 2017 8 2.380 0.165 3 2017 9 2.471 0.150 3 2017 10 2.420 0.130 3 2017 11 2.267 0.123 3 2017 12 2.388 0.160 4 2018 1 2.224 0.164 4 2018 2 2.169 0.260 3 2018 3 2.139 0.239 4 2018 4 2.225 0.164 4 2018 5 2.269 0.262 3 2018 6 2.330 0.282 1 2018 7 nan nan 0 2018 8 nan nan 0 2018 9 2.236 0.218 2 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