# File: insitu_global_F12.txt # Date: 2023-08-29 # # Data use policy see https://gml.noaa.gov/hats/hats_datause.html # # Chloroflurocarbon-12 (F12) 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 Chloroflurocarbon-12 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_F12_YYYY insitu_F12_MM insitu_NH_F12 insitu_NH_F12_sd insitu_SH_F12 insitu_SH_F12_sd insitu_Global_F12 insitu_Global_F12_sd 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 nan nan nan nan 1999 1 nan nan nan nan nan nan 1999 2 nan nan nan nan nan nan 1999 3 nan nan nan nan nan nan 1999 4 nan nan nan nan nan nan 1999 5 nan nan nan nan nan nan 1999 6 nan nan nan nan nan nan 1999 7 nan nan nan nan nan nan 1999 8 nan nan nan nan nan nan 1999 9 nan nan nan nan nan nan 1999 10 nan nan nan nan nan nan 1999 11 nan nan nan nan nan nan 1999 12 nan nan nan nan nan nan 2000 1 nan nan nan nan nan nan 2000 2 nan nan nan nan nan nan 2000 3 nan nan nan nan nan nan 2000 4 nan nan 538.380 0.590 nan nan 2000 5 nan nan 538.043 0.622 nan nan 2000 6 nan nan 538.069 0.528 nan nan 2000 7 nan nan 538.466 0.554 nan nan 2000 8 nan nan 539.012 0.547 nan nan 2000 9 nan nan 539.247 0.612 nan nan 2000 10 543.623 0.211 539.333 0.591 541.478 0.627 2000 11 543.462 0.303 539.572 0.565 541.517 0.641 2000 12 543.460 0.229 539.927 0.694 541.694 0.731 2001 1 543.443 0.223 540.310 0.687 541.876 0.722 2001 2 543.298 0.246 540.382 0.886 541.840 0.920 2001 3 543.084 0.223 540.170 0.802 541.627 0.833 2001 4 542.921 0.223 539.483 0.683 541.202 0.719 2001 5 542.887 0.211 538.990 0.730 540.938 0.760 2001 6 544.452 0.551 539.334 0.565 541.893 0.789 2001 7 544.318 0.611 540.273 0.608 542.296 0.862 2001 8 543.958 0.507 540.663 0.611 542.311 0.794 2001 9 544.268 0.545 540.427 0.561 542.348 0.782 2001 10 544.584 0.476 540.644 0.578 542.614 0.749 2001 11 544.993 0.512 541.120 0.751 543.056 0.909 2001 12 545.325 0.540 541.409 0.831 543.367 0.991 2002 1 545.567 0.704 541.527 0.861 543.547 1.113 2002 2 545.555 0.725 541.637 0.542 543.596 0.906 2002 3 544.798 0.663 541.314 0.497 543.056 0.828 2002 4 543.996 0.636 540.846 0.529 542.421 0.827 2002 5 544.184 0.745 540.570 0.532 542.377 0.916 2002 6 544.592 0.562 540.541 0.523 542.566 0.768 2002 7 544.629 0.529 540.614 0.499 542.622 0.727 2002 8 544.783 0.540 540.441 0.715 542.612 0.896 2002 9 545.371 0.559 540.361 0.541 542.866 0.778 2002 10 545.182 0.590 540.551 0.608 542.866 0.848 2002 11 544.589 0.568 540.539 0.544 542.564 0.786 2002 12 543.999 0.500 540.849 0.571 542.424 0.759 2003 1 543.827 0.530 540.828 0.515 542.328 0.739 2003 2 543.630 0.459 540.918 0.706 542.274 0.842 2003 3 543.536 0.406 540.798 0.488 542.167 0.635 2003 4 542.836 0.453 540.680 0.559 541.758 0.719 2003 5 542.656 0.447 540.333 0.547 541.494 0.706 2003 6 543.098 0.341 540.587 0.375 541.842 0.507 2003 7 543.642 0.318 540.818 0.473 542.230 0.570 2003 8 543.565 0.595 540.886 0.517 542.226 0.789 2003 9 543.664 0.618 540.827 0.584 542.245 0.850 2003 10 543.760 0.521 540.742 0.517 542.251 0.734 2003 11 543.779 0.525 541.276 0.558 542.527 0.766 2003 12 543.501 0.541 541.656 0.581 542.578 0.794 2004 1 543.300 0.604 541.612 0.636 542.456 0.877 2004 2 543.162 0.616 541.592 0.603 542.377 0.862 2004 3 543.156 0.544 541.637 0.672 542.397 0.865 2004 4 543.107 0.474 541.296 0.717 542.201 0.860 2004 5 543.314 0.602 540.829 0.515 542.071 0.792 2004 6 543.478 0.299 540.664 0.542 542.071 0.618 2004 7 543.461 0.470 540.713 0.513 542.087 0.696 2004 8 543.280 0.488 540.900 0.617 542.090 0.786 2004 9 543.334 0.613 540.844 0.665 542.089 0.904 2004 10 543.519 0.437 540.962 0.661 542.241 0.792 2004 11 543.497 0.288 541.059 0.767 542.278 0.819 2004 12 543.261 0.325 541.216 0.700 542.239 0.771 2005 1 543.076 0.310 540.945 0.608 542.011 0.682 2005 2 542.891 0.362 540.780 0.618 541.836 0.716 2005 3 542.783 0.331 540.613 0.639 541.698 0.719 2005 4 542.758 0.379 540.174 0.650 541.466 0.752 2005 5 542.682 0.375 539.790 0.587 541.236 0.697 2005 6 542.628 0.343 539.486 0.572 541.057 0.667 2005 7 542.689 0.359 539.557 0.603 541.123 0.702 2005 8 542.612 0.410 539.837 0.548 541.225 0.684 2005 9 542.358 0.513 540.320 0.563 541.339 0.762 2005 10 542.268 0.509 540.255 0.549 541.261 0.749 2005 11 542.189 0.453 540.239 0.608 541.214 0.758 2005 12 541.763 0.422 540.151 0.654 540.957 0.778 2006 1 541.379 0.357 540.207 0.725 540.793 0.808 2006 2 541.067 0.354 540.063 0.679 540.565 0.766 2006 3 540.913 0.459 539.332 0.638 540.122 0.786 2006 4 540.954 0.406 538.688 0.669 539.821 0.783 2006 5 540.953 0.619 538.539 0.824 539.746 1.031 2006 6 540.761 0.624 538.416 0.634 539.589 0.889 2006 7 540.523 0.621 538.077 0.590 539.300 0.857 2006 8 540.321 0.588 538.206 0.606 539.263 0.845 2006 9 540.113 0.567 538.472 0.665 539.292 0.874 2006 10 540.125 0.552 538.541 0.586 539.333 0.805 2006 11 540.050 0.568 538.479 0.579 539.264 0.811 2006 12 539.852 0.524 538.210 0.488 539.031 0.716 2007 1 539.604 0.472 538.138 0.457 538.871 0.657 2007 2 539.218 0.429 538.429 0.647 538.823 0.776 2007 3 538.905 0.473 538.541 0.711 538.723 0.854 2007 4 538.734 0.546 537.729 0.611 538.232 0.819 2007 5 538.590 0.504 537.140 0.543 537.865 0.741 2007 6 538.354 0.509 536.723 0.633 537.538 0.812 2007 7 538.339 0.538 536.339 0.444 537.339 0.697 2007 8 538.034 0.752 536.243 0.458 537.139 0.881 2007 9 537.903 0.744 536.421 0.452 537.162 0.871 2007 10 538.111 0.800 536.438 0.463 537.275 0.924 2007 11 538.158 0.734 536.258 0.494 537.208 0.884 2007 12 537.622 0.490 536.464 0.480 537.043 0.686 2008 1 537.119 0.523 536.543 0.629 536.831 0.818 2008 2 536.770 0.487 536.281 0.581 536.526 0.758 2008 3 536.602 0.401 535.657 0.600 536.130 0.722 2008 4 536.507 0.385 535.378 0.634 535.943 0.742 2008 5 536.260 0.702 535.090 0.581 535.675 0.912 2008 6 535.940 0.743 534.734 0.582 535.337 0.944 2008 7 535.812 0.641 534.404 0.562 535.108 0.852 2008 8 535.760 0.765 534.396 0.525 535.078 0.928 2008 9 535.557 0.804 534.568 0.617 535.063 1.014 2008 10 535.409 1.011 534.831 0.526 535.120 1.139 2008 11 535.254 0.732 534.996 0.579 535.125 0.933 2008 12 535.024 0.846 535.170 0.579 535.097 1.025 2009 1 534.728 0.763 534.860 0.601 534.794 0.971 2009 2 534.396 0.852 534.279 0.637 534.338 1.064 2009 3 534.085 0.623 533.673 0.620 533.879 0.879 2009 4 533.841 0.430 533.334 0.629 533.587 0.762 2009 5 533.529 0.447 532.833 0.609 533.181 0.755 2009 6 533.164 0.429 532.508 0.767 532.836 0.879 2009 7 533.157 0.415 532.162 0.880 532.660 0.973 2009 8 533.340 0.462 532.122 0.771 532.731 0.899 2009 9 533.243 0.444 531.819 1.159 532.531 1.242 2009 10 532.943 0.396 531.599 1.080 532.271 1.150 2009 11 532.855 0.386 531.358 1.348 532.106 1.402 2009 12 532.977 0.422 531.541 0.861 532.259 0.959 2010 1 532.940 0.445 531.272 0.885 532.106 0.991 2010 2 532.375 0.517 530.879 0.789 531.627 0.943 2010 3 531.964 0.492 530.612 0.987 531.288 1.103 2010 4 531.862 0.458 530.426 1.191 531.144 1.276 2010 5 531.848 0.466 530.138 0.430 530.993 0.634 2010 6 531.375 0.471 529.713 1.012 530.544 1.116 2010 7 530.943 0.490 529.258 1.195 530.101 1.291 2010 8 530.662 0.465 528.802 1.359 529.732 1.436 2010 9 530.623 0.501 528.779 1.341 529.701 1.432 2010 10 530.525 0.461 528.710 1.387 529.617 1.461 2010 11 530.146 0.487 528.612 1.173 529.379 1.270 2010 12 529.750 0.485 528.543 1.076 529.147 1.180 2011 1 529.270 0.510 528.257 0.867 528.764 1.006 2011 2 528.928 0.530 527.814 0.826 528.371 0.981 2011 3 528.561 0.551 527.279 1.176 527.920 1.299 2011 4 528.289 0.507 526.838 0.785 527.563 0.935 2011 5 527.951 0.511 526.741 0.849 527.346 0.991 2011 6 527.790 0.492 526.769 0.647 527.280 0.813 2011 7 527.429 0.514 526.501 0.715 526.965 0.881 2011 8 527.002 0.563 526.588 1.015 526.795 1.160 2011 9 526.869 0.543 526.770 1.244 526.819 1.357 2011 10 526.831 0.511 526.197 1.122 526.514 1.233 2011 11 526.589 0.523 525.195 0.941 525.892 1.076 2011 12 526.353 0.506 525.102 1.312 525.727 1.406 2012 1 526.645 0.538 525.242 1.140 525.943 1.261 2012 2 526.457 0.489 525.772 1.306 526.115 1.395 2012 3 525.843 0.478 525.745 1.594 525.794 1.665 2012 4 525.370 0.541 525.117 1.003 525.244 1.139 2012 5 525.251 0.532 524.264 0.783 524.758 0.947 2012 6 524.822 0.511 523.856 0.798 524.339 0.948 2012 7 524.434 0.523 523.640 0.701 524.037 0.875 2012 8 524.344 0.532 523.549 0.663 523.947 0.850 2012 9 524.761 0.535 523.005 0.748 523.883 0.919 2012 10 524.897 0.458 522.310 0.837 523.604 0.954 2012 11 524.707 0.487 521.974 0.819 523.341 0.953 2012 12 524.726 0.383 521.798 0.736 523.262 0.829 2013 1 525.005 0.290 522.019 0.722 523.512 0.778 2013 2 524.345 0.396 521.903 0.834 523.124 0.923 2013 3 523.236 0.465 521.304 0.947 522.270 1.055 2013 4 522.460 0.440 520.746 0.388 521.603 0.587 2013 5 522.251 0.348 520.626 0.788 521.438 0.861 2013 6 522.076 0.457 520.434 0.918 521.255 1.026 2013 7 521.935 0.442 520.324 0.894 521.129 0.998 2013 8 521.950 0.400 519.675 0.871 520.813 0.959 2013 9 521.821 0.480 519.019 0.949 520.420 1.064 2013 10 521.444 0.487 518.649 1.001 520.047 1.113 2013 11 520.996 0.447 518.386 0.918 519.691 1.021 2013 12 520.465 0.458 518.027 1.047 519.246 1.143 2014 1 520.312 0.677 517.523 0.852 518.918 1.088 2014 2 520.663 0.768 517.314 0.883 518.988 1.170 2014 3 520.701 0.666 517.343 0.834 519.022 1.067 2014 4 520.157 0.696 517.390 0.962 518.774 1.187 2014 5 519.771 0.573 517.344 0.967 518.557 1.124 2014 6 519.459 0.684 517.150 1.028 518.305 1.235 2014 7 519.022 0.625 516.785 0.569 517.904 0.846 2014 8 518.713 0.759 516.685 0.529 517.699 0.925 2014 9 518.630 0.753 516.688 0.518 517.659 0.914 2014 10 518.490 0.771 516.455 0.540 517.473 0.941 2014 11 518.201 0.859 515.970 0.543 517.085 1.016 2014 12 518.040 0.884 515.739 0.534 516.889 1.033 2015 1 517.838 0.822 515.812 0.551 516.825 0.990 2015 2 517.432 0.751 515.830 0.548 516.631 0.929 2015 3 516.974 0.694 515.356 0.472 516.165 0.840 2015 4 516.739 0.646 514.931 0.452 515.835 0.788 2015 5 516.508 0.580 514.527 0.488 515.517 0.758 2015 6 516.272 0.550 514.297 0.454 515.285 0.714 2015 7 515.804 0.580 514.361 0.487 515.083 0.757 2015 8 515.364 0.570 514.433 0.406 514.898 0.700 2015 9 515.170 0.569 513.958 0.448 514.564 0.724 2015 10 515.256 0.542 513.348 0.476 514.302 0.721 2015 11 515.170 0.522 513.066 0.470 514.118 0.703 2015 12 514.949 0.587 513.074 0.454 514.011 0.742 2016 1 514.681 0.426 512.872 0.441 513.776 0.613 2016 2 514.238 0.469 512.701 0.478 513.470 0.670 2016 3 513.650 0.504 512.539 0.486 513.094 0.700 2016 4 513.261 0.561 512.307 0.547 512.784 0.783 2016 5 512.818 0.465 511.815 0.478 512.316 0.667 2016 6 512.123 0.507 511.481 0.471 511.802 0.692 2016 7 511.464 0.515 511.058 0.551 511.261 0.754 2016 8 511.199 0.493 510.830 0.482 511.014 0.690 2016 9 511.297 0.523 510.688 0.517 510.992 0.736 2016 10 511.306 0.550 510.454 0.522 510.880 0.758 2016 11 511.051 0.597 510.028 0.568 510.540 0.824 2016 12 510.577 0.626 510.181 0.660 510.379 0.910 2017 1 510.231 0.537 509.744 0.674 509.988 0.862 2017 2 509.754 0.555 508.872 0.798 509.313 0.972 2017 3 509.388 0.601 508.375 0.871 508.882 1.059 2017 4 508.849 0.654 508.503 0.897 508.676 1.110 2017 5 508.567 0.601 508.249 0.894 508.408 1.077 2017 6 508.276 0.679 508.055 0.790 508.165 1.042 2017 7 507.876 0.678 507.833 0.490 507.854 0.836 2017 8 507.578 0.362 507.687 0.737 507.632 0.821 2017 9 507.582 0.356 507.565 0.667 507.574 0.756 2017 10 507.608 0.316 507.613 0.667 507.610 0.738 2017 11 507.678 0.253 507.252 0.646 507.465 0.694 2017 12 507.672 0.262 506.728 0.478 507.200 0.545 2018 1 507.471 0.259 506.222 0.479 506.847 0.545 2018 2 507.252 0.265 506.168 0.849 506.710 0.889 2018 3 507.015 0.276 506.229 1.117 506.622 1.150 2018 4 506.631 0.370 506.054 0.812 506.343 0.892 2018 5 506.299 0.360 505.626 0.861 505.963 0.934 2018 6 505.894 0.406 505.359 0.821 505.626 0.916 2018 7 505.416 0.400 505.181 0.821 505.299 0.913 2018 8 505.005 0.377 504.835 0.700 504.920 0.795 2018 9 504.811 0.356 504.533 0.697 504.672 0.783 2018 10 504.734 0.370 504.164 0.678 504.449 0.772 2018 11 504.923 0.420 503.693 0.706 504.308 0.821 2018 12 505.054 0.397 503.638 0.660 504.346 0.770 2019 1 504.513 0.443 503.183 0.699 503.848 0.827 2019 2 503.941 0.431 502.471 0.560 503.206 0.707 2019 3 503.598 0.446 501.878 0.457 502.738 0.639 2019 4 503.134 0.689 501.557 0.418 502.345 0.806 2019 5 502.303 0.659 501.068 0.466 501.686 0.807 2019 6 501.437 0.626 500.796 0.446 501.117 0.768 2019 7 500.632 0.508 500.623 0.471 500.627 0.692 2019 8 500.179 0.477 500.474 0.499 500.326 0.690 2019 9 500.135 0.543 500.266 0.509 500.201 0.744 2019 10 500.149 0.449 499.772 0.465 499.961 0.646 2019 11 500.089 0.420 499.365 0.496 499.727 0.650 2019 12 499.834 0.430 499.093 0.553 499.464 0.701 2020 1 499.503 0.444 498.873 0.571 499.188 0.723 2020 2 499.199 0.484 498.733 0.473 498.966 0.677 2020 3 498.938 0.462 498.519 0.370 498.729 0.592 2020 4 498.474 0.411 498.251 0.459 498.362 0.616 2020 5 497.939 0.719 497.968 0.447 497.953 0.846 2020 6 497.570 0.614 497.675 0.511 497.623 0.799 2020 7 497.314 0.606 497.368 0.623 497.341 0.869 2020 8 496.932 0.651 497.319 0.706 497.125 0.960 2020 9 496.571 0.572 496.874 0.804 496.722 0.987 2020 10 496.215 0.566 495.885 1.127 496.050 1.261 2020 11 495.555 0.592 495.065 0.655 495.310 0.883 2020 12 495.026 0.646 495.129 0.676 495.078 0.935 2021 1 495.038 0.637 495.385 0.442 495.212 0.776 2021 2 495.044 0.610 494.863 0.916 494.954 1.100 2021 3 494.556 0.550 494.391 0.820 494.474 0.987 2021 4 493.969 0.552 493.815 0.575 493.892 0.797 2021 5 493.477 0.500 493.420 0.609 493.448 0.788 2021 6 492.756 0.554 493.496 0.687 493.126 0.882 2021 7 492.237 0.587 493.944 0.460 493.091 0.745 2021 8 492.116 0.516 493.506 0.451 492.811 0.685 2021 9 492.286 0.529 492.884 0.433 492.585 0.684 2021 10 492.384 0.495 492.280 0.499 492.332 0.703 2021 11 492.565 0.411 491.735 0.451 492.150 0.610 2021 12 492.333 0.511 491.367 0.446 491.850 0.678 2022 1 491.850 0.533 491.357 0.416 491.604 0.676 2022 2 491.702 0.581 491.424 0.397 491.563 0.703 2022 3 491.714 0.620 491.381 0.435 491.547 0.758 2022 4 490.926 0.536 491.100 0.381 491.013 0.658 2022 5 489.964 0.544 490.779 0.381 490.371 0.664 2022 6 489.572 0.564 490.592 0.379 490.082 0.679 2022 7 489.295 0.582 490.384 0.337 489.839 0.672 2022 8 488.873 0.511 490.119 0.344 489.496 0.616 2022 9 488.631 0.563 489.395 0.359 489.013 0.668 2022 10 488.336 0.530 488.889 0.303 488.613 0.611 2022 11 487.760 0.568 488.573 0.271 488.167 0.629 2022 12 486.785 0.568 nan nan nan nan 2023 1 486.269 0.587 nan nan nan nan 2023 2 486.264 0.599 nan nan nan nan 2023 3 485.362 0.584 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