# file: lef_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: LEF -- Park Falls, Wisconsin -- 45.95 N, 90.27 W, 472 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 "lef_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 # MCottoLEFyr MCottoLEFmon MCottoLEFm MCottoLEFsd MCottoLEFn 1996 1 nan nan 0 1996 2 nan nan 0 1996 3 nan nan 0 1996 4 nan nan 0 1996 5 nan nan 0 1996 6 nan nan 0 1996 7 nan nan 0 1996 8 nan nan 0 1996 9 nan nan 0 1996 10 91.660 0.637 1 1996 11 nan nan 0 1996 12 87.130 0.872 1 1997 1 nan nan 0 1997 2 86.760 1.284 1 1997 3 87.450 0.979 1 1997 4 nan nan 0 1997 5 82.970 0.526 1 1997 6 81.580 0.493 1 1997 7 77.860 0.698 1 1997 8 nan nan 0 1997 9 76.660 0.813 1 1997 10 nan nan 0 1997 11 74.250 1.118 1 1997 12 73.760 0.771 1 1998 1 72.645 0.570 2 1998 2 72.290 0.695 1 1998 3 nan nan 0 1998 4 70.880 0.872 1 1998 5 69.736 0.778 2 1998 6 67.416 0.750 3 1998 7 65.405 1.223 2 1998 8 66.101 1.641 2 1998 9 63.610 0.561 1 1998 10 62.090 0.242 1 1998 11 61.450 0.410 2 1998 12 60.960 0.230 1 1999 1 60.690 0.439 1 1999 2 60.522 0.211 3 1999 3 60.170 0.365 1 1999 4 58.630 0.361 1 1999 5 57.874 0.361 2 1999 6 55.768 0.841 4 1999 7 54.678 0.898 2 1999 8 52.910 0.252 1 1999 9 53.213 0.764 3 1999 10 52.457 0.314 2 1999 11 51.870 0.467 2 1999 12 51.774 0.530 2 2000 1 51.450 0.431 1 2000 2 51.394 0.554 3 2000 3 50.711 0.707 2 2000 4 49.360 1.062 3 2000 5 48.235 0.523 3 2000 6 46.250 0.207 1 2000 7 46.100 0.531 3 2000 8 44.544 0.196 3 2000 9 44.473 0.801 3 2000 10 43.460 0.227 1 2000 11 43.581 0.316 3 2000 12 43.064 0.288 2 2001 1 42.779 0.203 3 2001 2 41.938 0.377 3 2001 3 42.058 0.214 2 2001 4 41.413 0.471 3 2001 5 40.255 0.520 4 2001 6 39.512 0.773 3 2001 7 38.149 1.209 5 2001 8 37.589 0.345 4 2001 9 36.771 0.263 3 2001 10 36.950 0.527 4 2001 11 36.428 0.170 2 2001 12 36.557 0.877 2 2002 1 36.229 0.184 4 2002 2 35.920 0.282 3 2002 3 35.605 0.184 4 2002 4 34.758 0.405 3 2002 5 34.294 0.202 4 2002 6 33.305 0.577 4 2002 7 32.554 0.615 4 2002 8 32.069 0.475 3 2002 9 31.353 0.211 4 2002 10 31.162 0.239 4 2002 11 30.877 0.288 2 2002 12 30.797 0.173 3 2003 1 30.634 0.242 4 2003 2 30.209 0.132 2 2003 3 29.975 0.257 4 2003 4 29.564 0.256 4 2003 5 28.884 0.360 5 2003 6 28.285 0.700 4 2003 7 27.279 0.440 4 2003 8 26.727 0.393 4 2003 9 26.757 0.479 4 2003 10 26.386 0.197 3 2003 11 26.099 0.252 2 2003 12 26.095 0.241 3 2004 1 25.978 0.240 3 2004 2 25.822 0.219 2 2004 3 25.632 0.286 4 2004 4 25.041 0.179 3 2004 5 24.478 0.400 4 2004 6 24.025 0.539 4 2004 7 23.261 0.483 4 2004 8 22.570 0.251 3 2004 9 22.241 0.372 4 2004 10 21.569 0.328 4 2004 11 21.400 0.171 4 2004 12 21.311 0.192 5 2005 1 21.199 0.176 3 2005 2 21.100 0.160 5 2005 3 20.988 0.130 2 2005 4 20.644 0.177 4 2005 5 20.327 0.258 5 2005 6 19.632 0.237 3 2005 7 19.319 0.361 4 2005 8 18.842 0.237 5 2005 9 18.328 0.206 4 2005 10 18.294 0.273 4 2005 11 18.212 0.126 4 2005 12 18.198 0.202 2 2006 1 17.970 0.215 3 2006 2 17.727 0.237 4 2006 3 17.734 0.375 3 2006 4 17.313 0.199 3 2006 5 16.843 0.235 4 2006 6 16.397 0.195 4 2006 7 16.061 0.342 4 2006 8 15.547 0.173 5 2006 9 15.373 0.198 3 2006 10 15.375 0.165 4 2006 11 15.227 0.250 5 2006 12 15.172 0.240 3 2007 1 15.006 0.180 3 2007 2 14.893 0.284 4 2007 3 14.966 0.269 4 2007 4 14.545 0.239 3 2007 5 14.586 0.226 2 2007 6 13.995 0.344 4 2007 7 13.471 0.232 4 2007 8 13.187 0.158 4 2007 9 13.070 0.160 4 2007 10 12.868 0.137 4 2007 11 12.699 0.216 3 2007 12 12.877 0.216 3 2008 1 12.726 0.171 3 2008 2 12.634 0.159 4 2008 3 12.453 0.144 4 2008 4 12.341 0.187 5 2008 5 11.989 0.159 3 2008 6 11.722 0.360 4 2008 7 11.344 0.195 4 2008 8 11.237 0.160 4 2008 9 10.999 0.263 2 2008 10 10.984 0.192 5 2008 11 10.987 0.239 4 2008 12 10.760 0.173 5 2009 1 10.754 0.332 2 2009 2 10.751 0.202 4 2009 3 10.494 0.187 4 2009 4 10.300 0.171 4 2009 5 10.210 0.205 2 2009 6 10.019 0.155 3 2009 7 9.693 0.111 3 2009 8 9.371 0.168 4 2009 9 9.292 0.116 4 2009 10 9.197 0.165 4 2009 11 9.323 0.229 3 2009 12 9.201 0.201 3 2010 1 9.039 0.158 3 2010 2 8.871 0.177 4 2010 3 8.744 0.183 3 2010 4 8.718 0.217 4 2010 5 8.651 0.145 4 2010 6 8.261 0.357 4 2010 7 8.016 0.147 3 2010 8 7.876 0.165 2 2010 9 7.853 0.151 3 2010 10 7.825 0.164 3 2010 11 7.758 0.214 3 2010 12 7.796 0.151 3 2011 1 7.470 0.168 4 2011 2 7.505 0.140 3 2011 3 7.461 0.181 4 2011 4 7.274 0.199 3 2011 5 7.245 0.160 4 2011 6 7.129 0.135 2 2011 7 6.830 0.131 3 2011 8 6.702 0.178 3 2011 9 6.726 0.255 3 2011 10 6.552 0.260 3 2011 11 6.727 0.285 3 2011 12 6.490 0.563 1 2012 1 6.412 0.195 2 2012 2 6.355 0.131 4 2012 3 6.118 0.281 4 2012 4 6.136 0.190 3 2012 5 6.162 0.155 3 2012 6 5.865 0.129 4 2012 7 5.674 0.179 3 2012 8 5.529 0.143 3 2012 9 5.512 0.184 3 2012 10 5.312 0.173 3 2012 11 5.318 0.224 2 2012 12 5.375 0.325 2 2013 1 5.296 0.150 2 2013 2 5.342 0.168 3 2013 3 5.090 0.197 3 2013 4 5.098 0.207 3 2013 5 4.923 0.109 3 2013 6 5.030 0.250 1 2013 7 4.791 0.154 3 2013 8 4.920 0.229 1 2013 9 4.745 0.298 3 2013 10 nan nan 0 2013 11 nan nan 0 2013 12 4.376 0.122 2 2014 1 4.293 0.217 3 2014 2 4.201 0.122 2 2014 3 4.123 0.230 4 2014 4 4.227 0.197 4 2014 5 4.197 0.186 2 2014 6 4.076 0.174 3 2014 7 4.113 0.182 2 2014 8 4.027 0.154 4 2014 9 3.921 0.182 4 2014 10 3.844 0.175 4 2014 11 3.897 0.216 3 2014 12 3.776 0.196 2 2015 1 3.605 0.233 2 2015 2 3.751 0.192 2 2015 3 3.684 0.190 3 2015 4 3.526 0.154 3 2015 5 3.540 0.244 1 2015 6 3.637 0.176 5 2015 7 3.476 0.164 2 2015 8 3.383 0.174 4 2015 9 3.291 0.189 4 2015 10 3.373 0.202 2 2015 11 3.198 0.164 2 2015 12 3.395 0.237 3 2016 1 3.149 0.253 3 2016 2 3.197 0.140 3 2016 3 3.038 0.207 2 2016 4 3.042 0.138 2 2016 5 3.035 0.148 4 2016 6 3.001 0.111 2 2016 7 2.978 0.137 3 2016 8 2.779 0.149 3 2016 9 2.744 0.162 3 2016 10 2.830 0.166 2 2016 11 2.776 0.127 5 2016 12 2.764 0.247 2 2017 1 2.745 0.241 2 2017 2 2.749 0.212 4 2017 3 2.615 0.137 2 2017 4 2.679 0.208 3 2017 5 2.594 0.186 5 2017 6 2.390 0.158 2 2017 7 2.400 0.132 3 2017 8 2.414 0.110 3 2017 9 2.402 0.126 2 2017 10 2.477 0.118 3 2017 11 2.375 0.104 3 2017 12 2.389 0.161 3 2018 1 2.432 0.165 3 2018 2 2.304 0.150 3 2018 3 2.220 0.200 1 2018 4 2.276 0.149 4 2018 5 2.281 0.161 2 2018 6 2.335 0.215 2 2018 7 nan nan 0 2018 8 nan nan 0 2018 9 2.083 0.144 3 2018 10 2.220 0.227 1 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