# File: insitu_global_CCl4.txt # Date: 2023-08-29 # # Data use policy see https://gml.noaa.gov/hats/hats_datause.html # # Carbon tetrachloride (CCl4) hemispheric and global monthly means from the NOAA/GML # Chromatograph for Atmospheric Trace Species (CATS) data from baseline observatories (Barrow, Alaska; # Summit, Greenland; Niwot Ridge, Colorado; Mauna Loa, Hawaii; American Samoa; South Pole). # This work was funded in part by the Atmospheric Chemistry Project of NOAA's Climate and # Global Change Program. # # Citation: # G.S. Dutton and B.D. Hall (2023), # Global Atmospheric Carbon tetrachloride Hemispheric and Global Mean Dry Air Mole Fractions from the # NOAA GML Halocarbons in situ Network, 1998-2023, Version: 2023-08-29, # https://doi.org/10.7289/V5X0659V # # For contact information see https://gml.noaa.gov/about/stafflist.html # # Calibration scale used: NOAA 2008 # More information about the calibration scale can be found at: https://gml.noaa.gov/ccl/ # # See (http://www.esrl.noaa.gov/gmd/obop/) for station statistics and personnel. # # The CATS GCs sample air once an hour. Global monthly data are provided in parts-per-trillion, ppt. # Abbreviations used: # yr=year, mon=month, m=monthly data; gc=type of sample--in situ GC data, sd=standard deviation of samples, # n=number of samples, brw=Pt. Barrow, Alaska, sum=Summit, Greenland, nwr= Niwot Ridge, Colorado # mlo=Mauna Loa, Hawaii, smo = American Samoa, spo=South Pole, Antarctica # NAN=not a number or no data, and space(s) is the delimiter. # # # The standard deviation (unc) reported is the estimate of insturmental precision. # The standard deviation (sd) reported is the estimate of insturmental precision and atmospheric variablity. # insitu_CCl4_YYYY insitu_CCl4_MM insitu_NH_CCl4 insitu_NH_CCl4_sd insitu_SH_CCl4 insitu_SH_CCl4_sd insitu_Global_CCl4 insitu_Global_CCl4_sd 1998 2 nan nan nan nan nan nan 1998 3 nan nan nan nan nan nan 1998 4 nan nan nan nan nan nan 1998 5 nan nan nan nan nan nan 1998 6 nan nan nan nan nan nan 1998 7 nan nan nan nan nan nan 1998 8 nan nan nan nan nan nan 1998 9 nan nan nan nan nan nan 1998 10 nan nan nan nan nan nan 1998 11 nan nan nan nan nan nan 1998 12 nan nan 101.429 0.157 nan nan 1999 1 nan nan 101.404 0.156 nan nan 1999 2 nan nan 101.308 0.140 nan nan 1999 3 nan nan 100.900 0.124 nan nan 1999 4 nan nan 100.875 0.113 nan nan 1999 5 nan nan 100.876 0.188 nan nan 1999 6 101.058 0.192 100.717 0.188 100.888 0.269 1999 7 100.859 0.195 100.545 0.132 100.702 0.236 1999 8 100.767 0.194 100.334 0.110 100.551 0.223 1999 9 100.946 0.197 100.069 0.161 100.508 0.254 1999 10 100.976 0.188 99.928 0.136 100.452 0.232 1999 11 100.993 0.193 99.954 0.143 100.473 0.240 1999 12 101.068 0.193 100.036 0.158 100.552 0.249 2000 1 101.021 0.206 99.958 0.113 100.490 0.235 2000 2 100.815 0.201 99.772 0.206 100.294 0.288 2000 3 100.691 0.236 99.519 0.206 100.105 0.314 2000 4 100.631 0.218 99.299 0.176 99.965 0.281 2000 5 100.677 0.261 98.949 0.170 99.813 0.311 2000 6 100.638 0.305 98.763 0.168 99.701 0.348 2000 7 100.427 0.158 98.716 0.170 99.571 0.232 2000 8 100.204 0.119 98.706 0.178 99.455 0.214 2000 9 100.399 0.127 98.645 0.179 99.522 0.219 2000 10 100.687 0.120 98.581 0.198 99.634 0.232 2000 11 100.791 0.128 98.593 0.136 99.692 0.187 2000 12 100.691 0.146 98.646 0.189 99.669 0.239 2001 1 100.490 0.091 98.715 0.119 99.602 0.150 2001 2 100.307 0.117 98.694 0.190 99.500 0.223 2001 3 100.186 0.116 98.594 0.189 99.390 0.222 2001 4 100.088 0.107 98.206 0.148 99.147 0.182 2001 5 99.699 0.126 97.948 0.131 98.823 0.182 2001 6 99.413 0.128 97.818 0.113 98.616 0.171 2001 7 98.979 0.109 97.843 0.164 98.411 0.197 2001 8 98.868 0.107 97.637 0.143 98.253 0.179 2001 9 99.035 0.129 97.618 0.185 98.326 0.226 2001 10 99.164 0.132 97.583 0.264 98.374 0.295 2001 11 99.114 0.128 97.485 0.167 98.299 0.210 2001 12 99.032 0.142 97.348 0.197 98.190 0.243 2002 1 98.894 0.147 97.405 0.140 98.149 0.203 2002 2 98.738 0.169 97.407 0.132 98.072 0.214 2002 3 98.593 0.146 97.224 0.120 97.909 0.189 2002 4 98.412 0.120 97.044 0.131 97.728 0.178 2002 5 98.386 0.107 96.838 0.143 97.612 0.179 2002 6 98.469 0.125 96.712 0.178 97.591 0.218 2002 7 98.340 0.105 96.620 0.174 97.480 0.203 2002 8 98.164 0.115 96.455 0.168 97.310 0.204 2002 9 98.326 0.116 96.321 0.143 97.324 0.185 2002 10 98.494 0.131 96.394 0.157 97.444 0.204 2002 11 98.413 0.137 96.490 0.199 97.451 0.241 2002 12 98.222 0.107 96.578 0.199 97.400 0.226 2003 1 98.096 0.122 96.512 0.183 97.304 0.220 2003 2 97.931 0.110 96.536 0.215 97.234 0.241 2003 3 97.767 0.127 96.525 0.209 97.146 0.244 2003 4 97.683 0.099 96.525 0.223 97.104 0.244 2003 5 97.689 0.116 96.244 0.194 96.967 0.226 2003 6 97.511 0.107 96.094 0.168 96.803 0.199 2003 7 97.217 0.117 96.093 0.144 96.655 0.186 2003 8 97.178 0.149 96.105 0.150 96.641 0.211 2003 9 97.343 0.168 95.929 0.176 96.636 0.244 2003 10 97.385 0.155 95.780 0.205 96.582 0.257 2003 11 97.239 0.207 95.811 0.174 96.525 0.271 2003 12 97.069 0.162 95.718 0.097 96.393 0.188 2004 1 96.883 0.151 95.539 0.212 96.211 0.260 2004 2 96.692 0.177 95.474 0.106 96.083 0.206 2004 3 96.665 0.155 95.427 0.128 96.046 0.201 2004 4 96.664 0.130 95.446 0.164 96.055 0.209 2004 5 96.541 0.126 95.304 0.164 95.923 0.206 2004 6 96.300 0.114 95.079 0.133 95.689 0.175 2004 7 96.277 0.274 94.896 0.116 95.586 0.298 2004 8 96.231 0.317 94.871 0.146 95.551 0.349 2004 9 96.051 0.135 94.767 0.202 95.409 0.243 2004 10 95.923 0.127 94.736 0.224 95.330 0.257 2004 11 95.949 0.105 94.856 0.240 95.402 0.262 2004 12 95.852 0.093 94.994 0.270 95.423 0.286 2005 1 95.618 0.092 94.886 0.212 95.252 0.231 2005 2 95.401 0.152 94.698 0.200 95.049 0.251 2005 3 95.320 0.156 94.687 0.251 95.003 0.296 2005 4 95.325 0.160 94.438 0.307 94.881 0.346 2005 5 95.281 0.159 94.096 0.252 94.689 0.298 2005 6 95.090 0.141 93.816 0.181 94.453 0.229 2005 7 94.848 0.151 93.712 0.184 94.280 0.238 2005 8 94.691 0.147 93.639 0.153 94.165 0.213 2005 9 94.722 0.176 93.767 0.152 94.245 0.233 2005 10 94.840 0.258 93.730 0.175 94.285 0.312 2005 11 94.849 0.239 93.741 0.145 94.295 0.279 2005 12 94.719 0.183 93.683 0.156 94.201 0.241 2006 1 94.381 0.160 93.657 0.165 94.019 0.230 2006 2 94.053 0.160 93.551 0.168 93.802 0.232 2006 3 93.863 0.360 93.327 0.135 93.595 0.384 2006 4 93.906 0.264 93.060 0.124 93.483 0.292 2006 5 93.884 0.257 92.958 0.174 93.421 0.310 2006 6 93.737 0.239 92.863 0.139 93.300 0.276 2006 7 93.604 0.181 92.659 0.145 93.132 0.232 2006 8 93.631 0.209 92.548 0.132 93.089 0.248 2006 9 93.683 0.223 92.556 0.146 93.119 0.266 2006 10 93.665 0.210 92.494 0.152 93.079 0.259 2006 11 93.617 0.135 92.451 0.133 93.034 0.190 2006 12 93.502 0.132 92.411 0.150 92.956 0.200 2007 1 93.346 0.193 92.436 0.139 92.891 0.237 2007 2 93.195 0.191 92.450 0.120 92.822 0.226 2007 3 93.091 0.192 92.395 0.122 92.743 0.227 2007 4 92.988 0.195 92.166 0.137 92.577 0.238 2007 5 92.916 0.216 91.910 0.115 92.413 0.244 2007 6 92.767 0.210 91.648 0.131 92.207 0.248 2007 7 92.661 0.235 91.393 0.125 92.027 0.266 2007 8 92.584 0.322 91.342 0.151 91.963 0.356 2007 9 92.507 0.331 91.336 0.141 91.922 0.359 2007 10 92.477 0.265 91.352 0.153 91.915 0.306 2007 11 92.388 0.245 91.223 0.166 91.806 0.296 2007 12 92.232 0.122 91.116 0.162 91.674 0.203 2008 1 92.104 0.152 91.052 0.169 91.578 0.227 2008 2 92.056 0.143 90.941 0.144 91.499 0.203 2008 3 91.900 0.146 90.775 0.156 91.338 0.214 2008 4 91.789 0.160 90.632 0.151 91.210 0.220 2008 5 91.753 0.185 90.512 0.160 91.133 0.244 2008 6 91.673 0.159 90.311 0.166 90.992 0.230 2008 7 91.487 0.115 90.100 0.167 90.794 0.203 2008 8 91.244 0.114 89.905 0.133 90.575 0.175 2008 9 91.195 0.323 89.730 0.160 90.462 0.361 2008 10 91.242 0.191 89.567 0.135 90.405 0.234 2008 11 91.210 0.146 89.536 0.165 90.373 0.220 2008 12 91.029 0.134 89.565 0.174 90.297 0.220 2009 1 90.839 0.131 89.531 0.165 90.185 0.211 2009 2 90.643 0.123 89.402 0.154 90.023 0.197 2009 3 90.413 0.211 89.268 0.152 89.841 0.260 2009 4 90.216 0.109 89.063 0.139 89.639 0.177 2009 5 90.129 0.137 88.881 0.132 89.505 0.190 2009 6 90.013 0.108 88.703 0.210 89.358 0.236 2009 7 89.795 0.113 88.672 0.206 89.233 0.235 2009 8 89.700 0.121 88.577 0.184 89.138 0.220 2009 9 89.650 0.164 88.453 0.227 89.052 0.280 2009 10 89.567 0.123 88.388 0.237 88.977 0.267 2009 11 89.442 0.121 88.387 0.255 88.914 0.282 2009 12 89.358 0.189 88.346 0.241 88.852 0.306 2010 1 89.291 0.478 88.172 0.223 88.732 0.527 2010 2 89.209 0.226 87.998 0.187 88.603 0.293 2010 3 89.075 0.574 87.909 0.226 88.492 0.617 2010 4 88.904 0.150 87.922 0.231 88.413 0.276 2010 5 88.986 0.120 87.810 0.196 88.398 0.230 2010 6 89.009 0.152 87.825 0.192 88.417 0.245 2010 7 88.775 0.133 87.760 0.243 88.267 0.277 2010 8 88.554 0.222 87.538 0.221 88.046 0.313 2010 9 88.644 0.199 87.464 0.247 88.054 0.317 2010 10 88.652 0.148 87.709 0.276 88.180 0.313 2010 11 88.386 0.183 87.636 0.319 88.011 0.368 2010 12 88.171 0.140 87.426 0.252 87.799 0.288 2011 1 88.014 0.138 87.204 0.217 87.609 0.258 2011 2 87.882 0.147 86.985 0.171 87.434 0.225 2011 3 87.727 0.118 86.792 0.207 87.259 0.238 2011 4 87.631 0.328 86.826 0.165 87.228 0.367 2011 5 87.543 0.118 86.758 0.198 87.150 0.231 2011 6 87.410 0.128 86.824 0.150 87.117 0.198 2011 7 87.212 0.126 86.746 0.244 86.979 0.275 2011 8 87.129 0.141 86.681 0.268 86.905 0.302 2011 9 87.203 0.161 86.567 0.288 86.885 0.330 2011 10 87.206 0.136 86.524 0.284 86.865 0.315 2011 11 87.150 0.213 86.298 0.233 86.724 0.315 2011 12 87.116 0.121 86.207 0.285 86.662 0.310 2012 1 87.019 0.137 86.212 0.299 86.615 0.329 2012 2 86.768 0.112 86.318 0.315 86.543 0.334 2012 3 86.661 0.106 86.221 0.380 86.441 0.395 2012 4 86.649 0.114 85.937 0.265 86.293 0.288 2012 5 86.583 0.222 85.814 0.156 86.199 0.271 2012 6 86.362 0.192 85.756 0.226 86.059 0.296 2012 7 86.155 0.322 85.626 0.203 85.891 0.381 2012 8 86.080 0.159 85.465 0.156 85.772 0.223 2012 9 86.118 0.133 85.369 0.214 85.743 0.251 2012 10 86.205 0.135 85.287 0.200 85.746 0.242 2012 11 86.227 0.161 85.286 0.189 85.756 0.248 2012 12 86.108 0.112 85.336 0.177 85.722 0.209 2013 1 85.909 0.150 85.293 0.237 85.601 0.281 2013 2 85.762 0.111 85.284 0.243 85.523 0.267 2013 3 85.610 0.140 85.074 0.211 85.342 0.253 2013 4 85.719 0.151 84.877 0.208 85.298 0.257 2013 5 85.883 0.116 84.647 0.236 85.265 0.263 2013 6 85.710 0.166 84.528 0.233 85.119 0.286 2013 7 85.363 0.251 84.406 0.225 84.885 0.337 2013 8 85.242 0.148 84.391 0.207 84.817 0.254 2013 9 85.257 0.220 84.239 0.213 84.748 0.306 2013 10 85.179 0.205 84.031 0.231 84.605 0.309 2013 11 85.068 0.130 83.973 0.205 84.521 0.243 2013 12 84.857 0.143 83.966 0.214 84.411 0.258 2014 1 84.788 0.128 83.921 0.262 84.355 0.291 2014 2 84.801 0.162 83.937 0.223 84.369 0.276 2014 3 84.829 0.127 83.814 0.221 84.322 0.255 2014 4 84.760 0.142 83.522 0.226 84.141 0.267 2014 5 84.680 0.109 83.274 0.229 83.977 0.254 2014 6 84.507 0.136 83.144 0.253 83.826 0.287 2014 7 84.249 0.126 82.943 0.186 83.596 0.225 2014 8 84.211 0.225 82.803 0.133 83.507 0.261 2014 9 84.317 0.527 82.718 0.169 83.518 0.554 2014 10 84.341 0.518 82.655 0.186 83.498 0.550 2014 11 84.236 0.235 82.540 0.184 83.388 0.298 2014 12 84.213 0.211 82.551 0.183 83.382 0.279 2015 1 84.126 0.202 82.621 0.194 83.374 0.280 2015 2 83.941 0.198 82.598 0.187 83.270 0.272 2015 3 83.775 0.158 82.379 0.201 83.077 0.256 2015 4 83.695 0.155 82.217 0.169 82.956 0.229 2015 5 83.638 0.138 81.859 0.167 82.749 0.216 2015 6 83.498 0.172 81.483 0.184 82.491 0.252 2015 7 83.263 0.294 81.295 0.196 82.279 0.353 2015 8 83.078 0.124 81.301 0.193 82.190 0.229 2015 9 82.950 0.225 81.183 0.186 82.066 0.292 2015 10 82.906 0.114 81.138 0.175 82.022 0.209 2015 11 82.849 0.124 81.135 0.184 81.992 0.222 2015 12 82.749 0.198 81.171 0.196 81.960 0.278 2016 1 82.550 0.184 81.156 0.195 81.853 0.268 2016 2 82.367 0.121 81.172 0.197 81.770 0.231 2016 3 82.286 0.128 81.087 0.196 81.687 0.234 2016 4 82.278 0.173 80.940 0.232 81.609 0.289 2016 5 82.270 0.093 80.742 0.249 81.506 0.266 2016 6 82.099 0.089 80.539 0.183 81.319 0.204 2016 7 81.872 0.093 80.410 0.170 81.141 0.194 2016 8 81.729 0.097 80.513 0.153 81.121 0.181 2016 9 81.738 0.131 80.564 0.159 81.151 0.206 2016 10 81.817 0.139 80.479 0.185 81.148 0.231 2016 11 81.752 0.158 80.344 0.174 81.048 0.235 2016 12 81.594 0.099 80.271 0.193 80.933 0.217 2017 1 81.431 0.107 80.241 0.200 80.836 0.227 2017 2 81.367 0.134 80.159 0.200 80.763 0.241 2017 3 81.252 0.129 79.953 0.211 80.603 0.247 2017 4 81.201 0.140 79.658 0.224 80.430 0.264 2017 5 81.214 0.119 79.613 0.197 80.414 0.230 2017 6 81.177 0.120 79.586 0.211 80.382 0.243 2017 7 81.082 0.117 79.432 0.130 80.257 0.175 2017 8 81.053 0.103 79.221 0.147 80.137 0.179 2017 9 81.118 0.096 79.192 0.132 80.155 0.163 2017 10 81.146 0.125 79.221 0.153 80.183 0.197 2017 11 81.038 0.113 79.229 0.135 80.133 0.176 2017 12 80.898 0.105 79.181 0.129 80.040 0.166 2018 1 80.774 0.101 79.172 0.143 79.973 0.175 2018 2 80.610 0.095 79.166 0.148 79.888 0.176 2018 3 80.473 0.088 79.045 0.210 79.759 0.228 2018 4 80.432 0.086 78.899 0.229 79.665 0.244 2018 5 80.354 0.091 78.787 0.243 79.570 0.260 2018 6 80.225 0.094 78.731 0.217 79.478 0.237 2018 7 80.080 0.146 78.634 0.235 79.357 0.276 2018 8 79.980 0.120 78.294 0.142 79.137 0.186 2018 9 79.984 0.088 78.051 0.148 79.018 0.172 2018 10 80.126 0.098 78.152 0.217 79.139 0.238 2018 11 80.188 0.107 78.310 0.209 79.249 0.235 2018 12 80.069 0.118 78.072 0.195 79.070 0.227 2019 1 79.846 0.121 78.066 0.273 78.956 0.299 2019 2 79.696 0.112 78.352 0.289 79.024 0.310 2019 3 79.560 0.108 78.512 0.184 79.036 0.213 2019 4 79.519 0.097 78.333 0.129 78.926 0.161 2019 5 79.317 0.110 78.212 0.238 78.764 0.262 2019 6 78.987 0.089 78.103 0.221 78.545 0.238 2019 7 78.685 0.101 78.118 0.283 78.402 0.301 2019 8 78.563 0.095 78.232 0.308 78.397 0.322 2019 9 78.517 0.103 78.064 0.274 78.290 0.293 2019 10 78.560 0.091 77.695 0.163 78.127 0.187 2019 11 78.546 0.110 77.393 0.189 77.969 0.219 2019 12 78.414 0.081 77.069 0.246 77.742 0.259 2020 1 78.262 0.082 76.635 0.234 77.448 0.248 2020 2 78.118 0.084 76.711 0.199 77.414 0.216 2020 3 77.983 0.076 76.958 0.189 77.471 0.204 2020 4 77.999 0.077 76.922 0.240 77.460 0.252 2020 5 78.037 0.154 76.542 0.215 77.290 0.265 2020 6 77.909 0.127 76.478 0.203 77.193 0.239 2020 7 77.646 0.104 76.546 0.251 77.096 0.272 2020 8 77.581 0.103 76.545 0.137 77.063 0.171 2020 9 77.575 0.119 76.455 0.133 77.015 0.178 2020 10 77.545 0.135 76.620 0.304 77.082 0.333 2020 11 77.427 0.109 76.696 0.268 77.062 0.289 2020 12 77.276 0.094 76.389 0.244 76.832 0.261 2021 1 77.145 0.114 76.046 0.244 76.595 0.270 2021 2 77.060 0.089 76.066 0.271 76.563 0.285 2021 3 77.000 0.100 75.984 0.339 76.492 0.353 2021 4 76.918 0.114 75.929 0.300 76.424 0.321 2021 5 76.848 0.121 75.984 0.221 76.416 0.252 2021 6 76.633 0.107 75.919 0.220 76.276 0.245 2021 7 76.483 0.110 75.774 0.224 76.128 0.250 2021 8 76.488 0.104 75.636 0.224 76.062 0.247 2021 9 76.517 0.095 75.368 0.204 75.943 0.225 2021 10 76.419 0.147 75.100 0.220 75.759 0.265 2021 11 76.364 0.184 75.099 0.223 75.731 0.289 2021 12 76.283 0.107 75.175 0.211 75.729 0.237 2022 1 76.144 0.095 75.243 0.184 75.693 0.207 2022 2 75.942 0.101 75.268 0.209 75.605 0.232 2022 3 75.773 0.131 75.193 0.220 75.483 0.256 2022 4 75.612 0.112 75.012 0.175 75.312 0.208 2022 5 75.520 0.107 74.749 0.172 75.134 0.202 2022 6 75.370 0.095 74.624 0.181 74.997 0.204 2022 7 75.128 0.100 74.564 0.211 74.846 0.234 2022 8 74.869 0.098 74.396 0.174 74.633 0.199 2022 9 74.758 0.104 74.219 0.111 74.489 0.152 2022 10 74.695 0.101 74.235 0.127 74.465 0.162 2022 11 74.701 0.096 74.180 0.108 74.441 0.145 2022 12 74.956 0.077 nan nan nan nan 2023 1 74.809 0.074 nan nan nan nan 2023 2 74.644 0.083 nan nan nan nan 2023 3 74.505 0.077 nan nan nan nan 2023 4 nan nan nan nan nan nan 2023 5 nan nan nan nan nan nan 2023 6 nan nan nan nan nan nan 2023 7 nan nan nan nan nan nan 2023 8 nan nan nan nan nan nan 2023 9 nan nan nan nan nan nan 2023 10 nan nan nan nan nan nan 2023 11 nan nan nan nan nan nan 2023 12 nan nan nan nan nan nan