# file: smo_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: SMO -- Tutuila, Samoa -- 14.25 S, 170.56 W, 42 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 "smo_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 # MCottoSMOyr MCottoSMOmon MCottoSMOm MCottoSMOsd MCottoSMOn 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 96.194 0.651 2 1995 10 94.996 0.603 2 1995 11 93.870 0.663 1 1995 12 93.180 0.806 1 1996 1 93.504 1.398 4 1996 2 90.790 1.806 1 1996 3 89.560 0.800 1 1996 4 89.482 0.642 3 1996 5 88.645 0.626 4 1996 6 86.422 0.926 5 1996 7 85.648 0.634 2 1996 8 85.058 0.650 3 1996 9 85.009 1.157 3 1996 10 83.078 2.326 2 1996 11 80.460 0.552 4 1996 12 79.881 1.598 2 1997 1 79.631 0.929 3 1997 2 77.592 0.749 2 1997 3 77.939 1.064 3 1997 4 76.222 0.621 3 1997 5 75.940 0.426 1 1997 6 75.566 0.420 5 1997 7 74.556 0.496 3 1997 8 74.287 0.629 4 1997 9 73.231 0.770 2 1997 10 71.742 0.919 2 1997 11 70.914 0.447 3 1997 12 69.063 0.912 3 1998 1 69.010 0.788 2 1998 2 67.951 0.650 2 1998 3 65.774 0.630 4 1998 4 64.967 0.692 2 1998 5 64.812 0.582 4 1998 6 64.270 0.586 3 1998 7 64.322 0.506 3 1998 8 63.581 0.678 4 1998 9 60.847 0.241 2 1998 10 60.535 0.913 3 1998 11 59.054 0.768 4 1998 12 57.440 0.339 2 1999 1 56.955 0.495 4 1999 2 55.778 0.369 5 1999 3 55.330 0.288 2 1999 4 54.924 0.258 2 1999 5 53.634 0.568 3 1999 6 53.502 0.409 4 1999 7 52.851 0.270 5 1999 8 52.265 0.349 4 1999 9 51.060 0.345 3 1999 10 50.516 0.495 4 1999 11 49.680 0.284 4 1999 12 48.734 0.452 4 2000 1 48.162 0.353 4 2000 2 47.514 0.395 3 2000 3 46.763 0.762 3 2000 4 46.099 0.443 3 2000 5 45.053 0.215 3 2000 6 44.906 0.353 4 2000 7 44.105 0.191 4 2000 8 43.596 0.641 4 2000 9 42.474 0.390 4 2000 10 41.730 0.666 4 2000 11 41.406 0.148 4 2000 12 40.686 0.311 2 2001 1 39.605 0.443 5 2001 2 38.590 0.141 3 2001 3 38.344 0.225 4 2001 4 38.174 0.255 2 2001 5 37.889 0.310 4 2001 6 37.283 0.250 4 2001 7 37.032 0.245 3 2001 8 36.544 0.254 4 2001 9 36.026 0.580 4 2001 10 35.561 0.414 4 2001 11 34.737 0.412 4 2001 12 34.420 0.245 3 2002 1 33.570 0.343 5 2002 2 33.362 0.239 4 2002 3 32.585 0.202 5 2002 4 32.199 0.208 4 2002 5 31.860 0.246 4 2002 6 31.615 0.240 7 2002 7 31.069 0.310 4 2002 8 31.320 0.217 5 2002 9 30.679 0.480 3 2002 10 29.720 0.303 5 2002 11 29.329 0.372 4 2002 12 28.950 0.228 4 2003 1 28.309 0.248 6 2003 2 27.669 0.296 4 2003 3 27.396 0.183 5 2003 4 26.930 0.238 6 2003 5 26.847 0.186 5 2003 6 26.806 0.195 5 2003 7 26.530 0.280 5 2003 8 25.952 0.342 5 2003 9 25.778 0.257 6 2003 10 25.218 0.329 5 2003 11 24.978 0.227 5 2003 12 24.396 0.264 4 2004 1 23.992 0.224 3 2004 2 23.776 0.308 5 2004 3 23.305 0.210 5 2004 4 23.123 0.175 6 2004 5 22.756 0.204 5 2004 6 22.711 0.115 6 2004 7 22.428 0.239 4 2004 8 22.001 0.171 4 2004 9 21.413 0.428 6 2004 10 20.774 0.197 4 2004 11 20.408 0.187 5 2004 12 19.970 0.187 5 2005 1 19.712 0.198 5 2005 2 19.411 0.168 5 2005 3 19.198 0.194 6 2005 4 18.935 0.178 4 2005 5 18.951 0.151 5 2005 6 18.673 0.182 6 2005 7 18.472 0.216 5 2005 8 18.168 0.209 6 2005 9 17.982 0.205 5 2005 10 17.526 0.246 5 2005 11 17.194 0.270 4 2005 12 17.026 0.235 5 2006 1 16.821 0.248 4 2006 2 16.624 0.328 5 2006 3 16.147 0.233 4 2006 4 15.880 0.188 4 2006 5 15.639 0.163 6 2006 6 15.439 0.154 4 2006 7 15.237 0.217 4 2006 8 15.171 0.149 7 2006 9 15.088 0.222 4 2006 10 14.765 0.219 5 2006 11 14.506 0.179 5 2006 12 14.107 0.181 5 2007 1 14.020 0.226 5 2007 2 13.873 0.234 5 2007 3 13.664 0.235 5 2007 4 13.204 0.183 5 2007 5 13.175 0.144 4 2007 6 12.977 0.125 4 2007 7 12.887 0.204 4 2007 8 12.722 0.148 6 2007 9 12.593 0.211 4 2007 10 12.228 0.230 6 2007 11 12.065 0.182 5 2007 12 11.889 0.214 4 2008 1 11.684 0.241 5 2008 2 11.540 0.182 5 2008 3 11.496 0.154 5 2008 4 11.244 0.136 6 2008 5 11.127 0.155 5 2008 6 10.998 0.219 5 2008 7 10.990 0.159 6 2008 8 10.861 0.132 5 2008 9 10.608 0.290 4 2008 10 10.389 0.202 6 2008 11 10.317 0.258 5 2008 12 10.028 0.234 5 2009 1 9.972 0.269 5 2009 2 9.908 0.215 4 2009 3 9.685 0.257 5 2009 4 9.622 0.195 6 2009 5 9.385 0.228 5 2009 6 9.382 0.163 4 2009 7 9.225 0.135 9 2009 8 9.080 0.153 6 2009 9 8.894 0.130 8 2009 10 8.793 0.158 3 2009 11 8.623 0.157 6 2009 12 8.492 0.164 6 2010 1 8.224 0.220 3 2010 2 8.023 0.262 4 2010 3 8.016 0.148 5 2010 4 nan nan 0 2010 5 nan nan 0 2010 6 7.770 0.256 1 2010 7 7.714 0.148 4 2010 8 7.532 0.146 4 2010 9 7.545 0.189 5 2010 10 7.311 0.209 3 2010 11 7.090 0.285 1 2010 12 7.059 0.246 4 2011 1 7.052 0.188 3 2011 2 7.110 0.238 1 2011 3 6.651 0.178 5 2011 4 6.641 0.204 3 2011 5 6.728 0.190 4 2011 6 6.569 0.202 3 2011 7 6.542 0.161 3 2011 8 6.505 0.181 3 2011 9 6.312 0.164 6 2011 10 6.309 0.208 5 2011 11 6.106 0.216 3 2011 12 6.065 0.205 2 2012 1 5.851 0.203 2 2012 2 5.929 0.171 4 2012 3 5.873 0.188 3 2012 4 5.675 0.159 4 2012 5 5.544 0.157 2 2012 6 5.641 0.192 3 2012 7 5.625 0.142 3 2012 8 5.307 0.146 3 2012 9 5.383 0.208 3 2012 10 5.212 0.151 5 2012 11 5.220 0.190 4 2012 12 4.951 0.153 4 2013 1 4.930 0.142 4 2013 2 4.853 0.181 4 2013 3 4.710 0.190 3 2013 4 4.646 0.152 3 2013 5 4.624 0.123 4 2013 6 4.619 0.130 3 2013 7 4.660 0.184 4 2013 8 4.510 0.285 6 2013 9 4.319 0.181 4 2013 10 4.240 0.181 1 2013 11 4.197 0.166 3 2013 12 4.148 0.177 4 2014 1 3.897 0.165 5 2014 2 3.817 0.175 2 2014 3 3.751 0.216 3 2014 4 3.724 0.197 5 2014 5 3.848 0.233 2 2014 6 3.914 0.252 3 2014 7 3.889 0.159 5 2014 8 3.917 0.153 4 2014 9 3.781 0.191 4 2014 10 3.687 0.189 4 2014 11 3.589 0.227 4 2014 12 3.566 0.197 5 2015 1 3.453 0.169 3 2015 2 3.357 0.206 4 2015 3 3.437 0.167 3 2015 4 3.336 0.153 4 2015 5 3.313 0.148 5 2015 6 3.458 0.206 3 2015 7 3.336 0.181 4 2015 8 3.147 0.197 4 2015 9 3.038 0.224 4 2015 10 3.159 0.176 4 2015 11 3.067 0.180 2 2015 12 2.987 0.149 4 2016 1 2.936 0.160 5 2016 2 2.929 0.228 2 2016 3 2.863 0.131 2 2016 4 2.771 0.131 4 2016 5 2.797 0.177 2 2016 6 2.799 0.138 5 2016 7 2.672 0.148 4 2016 8 2.748 0.134 4 2016 9 2.627 0.140 4 2016 10 2.536 0.130 4 2016 11 2.582 0.182 4 2016 12 2.521 0.136 2 2017 1 2.460 0.130 5 2017 2 2.500 0.145 3 2017 3 2.467 0.169 4 2017 4 2.378 0.200 3 2017 5 2.454 0.245 2 2017 6 2.316 0.116 3 2017 7 2.356 0.083 4 2017 8 2.335 0.108 6 2017 9 2.391 0.157 3 2017 10 2.238 0.129 6 2017 11 2.171 0.121 4 2017 12 2.160 0.206 1 2018 1 nan nan 0 2018 2 2.096 0.119 3 2018 3 2.150 0.245 3 2018 4 2.126 0.166 4 2018 5 2.130 0.163 4 2018 6 2.310 0.154 1 2018 7 nan nan 0 2018 8 2.073 0.138 3 2018 9 2.070 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