# file: kum_CCl4_MM.dat # # Atmospheric measurements of CCl4 (Carbon Tetrachloride, CT) # # Measurements are from the NOAA/ESRL/GMD/HATS flask program # (http://www.esrl.noaa.gov/gmd/hats/flask/flasks.html). # Instrument ID: Otto # # Location: KUM -- Cape Kumukahi, Hawaii -- 19.52 N, 154.82 W, 3 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. # # CCl4 loss during storage in stainless-steel canisters arises most commonly at # high-latitude and/or high-altitude sites where the air is dry (i.e. ALT, BRW, # MLO, NWR, and SPO -- especially in winter). Extra efforts have been made to # flag samples suspected of suffering from this known artifact, thereby barring # them from inclusion in monthly mean estimates. The user is cautioned, # however, that small biases to the low side may nevertheless remain. # # These data represent monthly mean estimates computed using those data marked # with a 0 in flag column 7 of the companion file named "kum_CCl4_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: Carbon Tetrachloride # data from the NOAA/ESRL halocarbons flask program. # # Calibration scale: NOAA 2008 # 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 CCl4 in ppt # sd Standard deviation of the mean (or single-sample precision value) # n Number of samples # CCl4ottoKUMyr CCl4ottoKUMmon CCl4ottoKUMm CCl4ottoKUMsd CCl4ottoKUMn 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 nan nan 0 1995 11 106.290 0.413 1 1995 12 105.510 0.455 1 1996 1 105.040 0.499 2 1996 2 105.400 0.381 1 1996 3 105.570 0.274 2 1996 4 105.695 0.559 2 1996 5 105.430 0.423 3 1996 6 105.578 0.717 3 1996 7 105.420 0.353 4 1996 8 105.180 0.749 3 1996 9 105.725 0.736 4 1996 10 105.027 0.548 2 1996 11 104.505 0.544 2 1996 12 104.670 0.326 3 1997 1 104.495 0.446 2 1997 2 104.733 0.467 2 1997 3 104.443 1.039 2 1997 4 104.829 0.858 3 1997 5 104.617 0.523 2 1997 6 104.197 0.314 2 1997 7 104.195 0.668 3 1997 8 104.110 0.276 1 1997 9 103.975 0.332 2 1997 10 104.628 0.484 3 1997 11 103.910 0.368 2 1997 12 103.889 0.413 2 1998 1 103.845 0.544 2 1998 2 104.402 0.353 2 1998 3 104.096 0.735 2 1998 4 103.328 0.296 2 1998 5 103.394 0.385 4 1998 6 103.216 0.559 2 1998 7 103.302 0.242 4 1998 8 103.600 0.936 4 1998 9 102.763 0.320 2 1998 10 102.966 0.339 2 1998 11 103.054 0.233 3 1998 12 102.490 0.315 1 1999 1 102.570 0.679 2 1999 2 102.241 0.237 2 1999 3 102.895 0.190 2 1999 4 102.190 0.225 1 1999 5 101.792 0.148 2 1999 6 102.405 0.665 4 1999 7 101.047 0.199 3 1999 8 101.360 0.233 4 1999 9 101.566 0.255 2 1999 10 101.559 0.187 4 1999 11 101.564 0.300 5 1999 12 101.457 0.225 3 2000 1 101.420 0.389 4 2000 2 101.448 0.306 5 2000 3 100.707 0.314 3 2000 4 100.695 0.506 4 2000 5 101.280 0.269 1 2000 6 100.426 0.404 4 2000 7 100.200 0.349 3 2000 8 100.625 0.249 4 2000 9 100.370 0.113 1 2000 10 100.545 0.220 3 2000 11 101.051 0.325 4 2000 12 100.459 0.346 2 2001 1 100.960 0.469 2 2001 2 100.018 0.471 4 2001 3 99.955 0.309 4 2001 4 100.011 0.197 5 2001 5 nan nan 0 2001 6 99.949 0.221 5 2001 7 99.622 0.188 4 2001 8 99.652 0.289 4 2001 9 100.146 0.237 4 2001 10 99.935 0.184 4 2001 11 100.176 0.329 3 2001 12 99.834 0.405 3 2002 1 99.311 0.253 4 2002 2 99.489 0.402 4 2002 3 99.109 0.233 4 2002 4 99.250 0.495 2 2002 5 98.851 0.199 3 2002 6 98.631 0.323 5 2002 7 98.200 0.488 2 2002 8 98.225 0.263 4 2002 9 98.838 0.371 5 2002 10 98.945 0.402 4 2002 11 98.370 0.770 3 2002 12 99.156 0.289 5 2003 1 98.182 0.233 4 2003 2 97.973 0.184 4 2003 3 97.895 0.205 5 2003 4 97.789 0.349 4 2003 5 97.394 0.202 4 2003 6 97.874 0.232 4 2003 7 97.609 0.151 4 2003 8 97.120 0.240 3 2003 9 97.377 0.187 5 2003 10 97.447 0.164 4 2003 11 97.229 0.245 2 2003 12 97.022 0.284 4 2004 1 96.948 0.273 3 2004 2 96.762 0.338 5 2004 3 96.359 0.188 3 2004 4 96.856 0.168 4 2004 5 96.778 0.203 4 2004 6 96.618 0.219 5 2004 7 96.416 0.151 4 2004 8 96.546 0.223 5 2004 9 96.546 0.262 4 2004 10 96.180 0.281 4 2004 11 96.101 0.393 4 2004 12 96.415 0.251 4 2005 1 96.516 0.188 4 2005 2 96.296 0.190 5 2005 3 96.275 0.231 4 2005 4 96.323 0.419 3 2005 5 96.218 0.204 5 2005 6 95.952 0.436 4 2005 7 95.557 0.343 5 2005 8 95.630 0.246 4 2005 9 95.163 0.159 4 2005 10 95.486 0.254 5 2005 11 95.309 0.279 2 2005 12 95.951 0.290 2 2006 1 95.077 0.153 4 2006 2 94.511 0.318 4 2006 3 94.455 0.189 4 2006 4 94.535 0.263 5 2006 5 94.296 0.273 4 2006 6 94.578 0.188 4 2006 7 94.090 0.178 5 2006 8 93.815 0.259 4 2006 9 93.635 0.182 4 2006 10 93.804 0.178 5 2006 11 93.967 0.235 4 2006 12 93.719 0.228 4 2007 1 93.835 0.185 4 2007 2 93.559 0.229 4 2007 3 93.514 0.417 4 2007 4 93.540 0.354 5 2007 5 93.231 0.378 4 2007 6 93.340 0.239 4 2007 7 93.217 0.282 4 2007 8 93.177 0.353 4 2007 9 93.042 0.277 4 2007 10 92.645 0.293 5 2007 11 92.726 0.238 3 2007 12 92.408 0.210 5 2008 1 92.273 0.274 4 2008 2 92.298 0.172 4 2008 3 92.076 0.193 4 2008 4 91.611 0.205 4 2008 5 92.132 0.215 4 2008 6 91.718 0.252 5 2008 7 91.095 0.209 4 2008 8 91.121 0.271 4 2008 9 91.190 0.224 5 2008 10 91.214 0.203 4 2008 11 90.984 0.215 3 2008 12 90.763 0.380 4 2009 1 90.364 0.236 4 2009 2 90.163 0.174 4 2009 3 90.141 0.233 3 2009 4 90.072 0.246 5 2009 5 90.026 0.296 3 2009 6 90.043 0.226 5 2009 7 89.754 0.183 4 2009 8 89.821 0.221 5 2009 9 90.148 0.174 4 2009 10 90.313 0.357 4 2009 11 90.288 0.266 5 2009 12 90.016 0.318 4 2010 1 89.934 0.183 3 2010 2 89.881 0.200 3 2010 3 89.841 0.222 3 2010 4 89.596 0.297 4 2010 5 89.655 0.158 5 2010 6 89.254 0.172 3 2010 7 89.010 0.150 4 2010 8 89.153 0.281 5 2010 9 89.082 0.197 4 2010 10 89.088 0.260 4 2010 11 88.673 0.329 3 2010 12 88.600 0.263 4 2011 1 89.014 0.209 3 2011 2 88.377 0.170 4 2011 3 88.312 0.188 5 2011 4 88.415 0.222 3 2011 5 87.898 0.205 5 2011 6 87.945 0.191 4 2011 7 87.735 0.188 4 2011 8 87.590 0.208 5 2011 9 87.565 0.183 4 2011 10 87.277 0.164 4 2011 11 87.817 0.244 4 2011 12 87.442 0.246 4 2012 1 87.303 0.179 4 2012 2 86.953 0.226 4 2012 3 87.060 0.311 3 2012 4 86.580 0.205 5 2012 5 86.918 0.270 4 2012 6 87.059 0.144 4 2012 7 86.636 0.496 5 2012 8 86.737 0.140 4 2012 9 86.328 0.283 2 2012 10 86.549 0.236 4 2012 11 86.676 0.197 4 2012 12 86.196 0.257 4 2013 1 86.424 0.233 4 2013 2 86.419 0.348 2 2013 3 86.240 0.211 4 2013 4 85.927 0.252 4 2013 5 85.777 0.262 2 2013 6 86.085 0.205 3 2013 7 85.538 0.311 2 2013 8 85.319 0.566 2 2013 9 nan nan 0 2013 10 85.520 2.023 1 2013 11 85.508 0.231 2 2013 12 85.208 0.232 5 2014 1 85.206 0.169 4 2014 2 85.418 0.206 4 2014 3 nan nan 0 2014 4 nan nan 0 2014 5 nan nan 0 2014 6 nan nan 0 2014 7 84.515 0.268 4 2014 8 84.724 0.327 3 2014 9 84.406 0.476 4 2014 10 84.531 0.171 4 2014 11 84.441 0.235 2 2014 12 84.508 0.206 5 2015 1 83.703 0.212 4 2015 2 83.642 0.364 4 2015 3 83.162 0.257 3 2015 4 83.209 0.182 4 2015 5 83.480 0.241 4 2015 6 83.291 0.170 5 2015 7 83.605 0.218 4 2015 8 83.089 0.297 3 2015 9 83.313 0.515 5 2015 10 83.361 0.219 3 2015 11 83.370 0.262 4 2015 12 82.997 0.090 4 2016 1 82.785 0.826 2 2016 2 82.510 0.602 1 2016 3 82.974 0.311 3 2016 4 82.246 0.294 4 2016 5 82.442 0.370 3 2016 6 82.617 0.292 3 2016 7 82.256 0.514 4 2016 8 82.231 0.360 4 2016 9 82.593 0.304 2 2016 10 81.826 0.446 2 2016 11 82.362 0.516 3 2016 12 82.785 0.682 4 2017 1 82.083 0.615 5 2017 2 81.977 0.336 4 2017 3 81.781 0.216 4 2017 4 82.085 0.629 2 2017 5 81.902 0.336 4 2017 6 82.058 0.509 4 2017 7 81.261 0.644 5 2017 8 81.046 0.335 4 2017 9 81.331 0.587 2 2017 10 81.186 0.506 4 2017 11 80.927 0.700 5 2017 12 80.778 0.692 4 2018 1 80.943 0.621 4 2018 2 80.740 0.781 4 2018 3 79.868 0.574 4 2018 4 80.306 0.516 4 2018 5 79.860 0.478 1 2018 6 80.564 0.516 2 2018 7 nan nan 0 2018 8 80.140 0.381 1 2018 9 79.451 0.398 3 2018 10 79.634 0.571 3 2018 11 80.013 0.314 3 2018 12 79.364 0.629 2 2019 1 79.600 2.161 1 2019 2 78.790 0.266 3 2019 3 79.274 0.371 4 2019 4 79.013 0.236 4 2019 5 79.121 0.343 3 2019 6 78.787 0.188 5 2019 7 78.894 0.389 3 2019 8 78.886 0.377 2 2019 9 nan nan 0 2019 10 nan nan 0 2019 11 nan nan 0 2019 12 nan nan 0