# file: global_F12_MM.dat # # Atmospheric measurements of CCl2F2 (CFC-12, Chlorofluorocarbon-12, F12) # # Measurements are from the NOAA/ESRL/GMD/HATS flask program # (http://www.esrl.noaa.gov/gmd/hats/flask/flasks.html). # Instrument ID: Otto # # Location: Global -- Monthly Global-Hemispheric Means # 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 global and hemispheric mean estimates computed # using data from the monthly companion files named *_F12_MM.dat, where * # refers to a 3-character baseline site code. For any given month in the more # recent period, data from as many as 12 sites may be used to derive the global # mean, including as many as 4 sites in the southern hemisphere and up to 8 in # the northern hemisphere. From north to south, these baseline sites include # ALT, SUM, BRW, MHD, THD, NWR, MLO, KUM, SMO, CGO, PSA, and SPO: # # ALT - Alert, Canada 82.45 N 62.51 W 190 m # SUM - Summit, Greenland 72.60 N 38.42 W 3209 m # BRW - Barrow, Alaska 71.32 N 156.61 W 11 m # MHD - Mace Head, Ireland 53.33 N 9.90 W 5 m # THD - Trinidad Head, California 41.05 N 124.15 W 107 m # NWR - Niwot Ridge, Colorado 40.05 N 105.59 W 3523 m # MLO - Mauna Loa, Hawaii 19.54 N 155.58 W 3397 m # KUM - Cape Kumukahi, Hawaii 19.52 N 154.82 W 3 m # SMO - Tutuila, Samoa 14.25 S 170.56 W 42 m # CGO - Cape Grim, Tasmania 40.68 S 144.69 E 94 m # PSA - Palmer Station, Antarctica 64.92 S 64.00 W 10 m # SPO - South Pole, Antarctica 89.98 S 24.80 W 2810 m # # The global and hemispheric uncertainties reported here are bootstrapped from # 1000 'resamples' of the input monthly means drawn in accordance with the # uncertainties reported in the companion files. # # 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: CFC-12 # 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 # # Mising value: "nan" # # Data Columns: # yr Year # mon Month # NHm Northern Hemispheric mean concentration of F12 in ppt # NHsd Northern Hemispheric standard deviation # SHm Southern Hemispheric mean concentration # SHsd Southern Hemispheric standard deviation # GLm Global mean concentration # GLsd Global standard deviation # F12ottoyr F12ottomon F12ottoNHm F12ottoNHsd F12ottoSHm F12ottoSHsd F12ottoGLm F12ottoGLsd 1995 1 nan nan nan nan nan nan 1995 2 nan nan nan nan nan nan 1995 3 527.579 1.201 518.574 1.909 523.076 1.145 1995 4 529.511 1.246 519.345 0.959 524.428 0.764 1995 5 529.892 1.090 519.733 0.985 524.812 0.748 1995 6 528.777 0.766 520.041 0.962 524.409 0.604 1995 7 529.789 1.240 520.471 0.977 525.130 0.796 1995 8 532.159 0.748 520.845 0.964 526.502 0.619 1995 9 530.864 0.938 521.883 0.733 526.373 0.603 1995 10 532.871 0.871 522.580 1.058 527.725 0.699 1995 11 532.542 0.567 523.682 0.622 528.112 0.425 1995 12 532.133 0.470 523.553 0.898 527.843 0.511 1996 1 532.423 0.759 524.730 0.596 528.576 0.474 1996 2 533.429 0.543 524.840 0.701 529.135 0.438 1996 3 532.920 0.687 524.333 0.806 528.626 0.525 1996 4 532.381 0.577 524.344 0.811 528.362 0.499 1996 5 532.735 0.633 525.346 0.674 529.041 0.470 1996 6 533.182 0.628 525.693 0.646 529.437 0.449 1996 7 533.291 0.585 525.301 0.552 529.296 0.412 1996 8 534.480 0.570 525.595 0.751 530.038 0.470 1996 9 535.067 0.457 526.746 0.749 530.907 0.446 1996 10 535.211 0.447 526.682 0.658 530.946 0.408 1996 11 535.621 0.611 528.239 0.635 531.930 0.449 1996 12 535.471 0.450 529.425 0.514 532.448 0.345 1997 1 536.619 0.552 529.126 0.628 532.872 0.423 1997 2 536.431 0.599 529.322 0.838 532.876 0.502 1997 3 536.237 0.539 529.821 0.952 533.029 0.560 1997 4 535.578 0.677 529.750 0.982 532.664 0.608 1997 5 536.263 0.366 529.470 0.787 532.866 0.434 1997 6 536.257 0.452 530.394 0.657 533.326 0.406 1997 7 536.391 0.777 530.294 0.660 533.342 0.514 1997 8 537.332 0.465 530.214 0.643 533.773 0.394 1997 9 538.459 0.578 531.505 0.792 534.982 0.486 1997 10 539.445 0.599 531.915 1.446 535.680 0.790 1997 11 539.428 0.693 531.857 0.728 535.643 0.497 1997 12 539.635 0.631 532.227 1.045 535.931 0.607 1998 1 539.116 0.518 531.723 0.932 535.420 0.534 1998 2 539.665 0.742 531.656 0.695 535.660 0.504 1998 3 539.150 0.617 531.636 0.715 535.393 0.478 1998 4 539.240 0.577 531.261 0.609 535.251 0.412 1998 5 539.308 0.440 531.998 0.729 535.653 0.424 1998 6 539.473 0.574 532.297 0.566 535.885 0.390 1998 7 539.549 0.372 532.924 0.580 536.237 0.345 1998 8 539.722 0.458 533.449 0.435 536.586 0.311 1998 9 540.710 0.562 534.468 0.851 537.589 0.503 1998 10 540.794 0.571 536.418 1.116 538.606 0.630 1998 11 541.442 0.434 536.248 0.880 538.845 0.486 1998 12 541.767 0.598 536.905 1.040 539.336 0.601 1999 1 541.783 0.613 536.236 0.554 539.009 0.413 1999 2 542.032 0.455 537.061 0.967 539.547 0.537 1999 3 541.720 0.687 537.728 1.155 539.724 0.670 1999 4 542.174 0.519 538.205 0.856 540.190 0.500 1999 5 541.660 0.495 536.707 0.726 539.184 0.435 1999 6 541.926 0.442 537.209 0.636 539.567 0.391 1999 7 541.793 0.403 536.365 0.437 539.079 0.297 1999 8 541.722 0.417 537.432 0.487 539.577 0.320 1999 9 542.379 0.400 537.648 0.580 540.013 0.352 1999 10 543.047 0.583 537.957 0.692 540.502 0.448 1999 11 543.063 0.493 538.078 0.741 540.570 0.450 1999 12 543.141 0.545 538.658 1.043 540.899 0.593 2000 1 543.808 0.540 539.703 0.709 541.755 0.453 2000 2 543.592 0.450 539.528 0.728 541.560 0.431 2000 3 543.211 0.506 538.898 0.708 541.055 0.433 2000 4 544.102 0.582 539.186 0.883 541.644 0.531 2000 5 544.675 0.513 539.859 0.737 542.267 0.447 2000 6 545.134 0.614 539.947 1.078 542.541 0.623 2000 7 544.986 0.769 540.683 1.018 542.834 0.653 2000 8 543.801 0.415 539.835 1.159 541.818 0.611 2000 9 544.392 0.499 539.821 0.868 542.106 0.500 2000 10 545.560 0.415 540.058 1.028 542.809 0.558 2000 11 545.715 0.400 539.936 0.670 542.826 0.389 2000 12 545.619 0.436 540.531 1.278 543.075 0.678 2001 1 545.109 0.455 540.362 0.608 542.735 0.362 2001 2 545.357 0.417 540.564 1.096 542.961 0.588 2001 3 545.048 0.588 539.640 0.694 542.344 0.449 2001 4 544.618 0.461 539.273 0.793 541.945 0.466 2001 5 545.252 0.395 539.727 0.441 542.489 0.296 2001 6 544.534 0.487 539.731 0.514 542.132 0.360 2001 7 544.223 0.419 539.844 0.546 542.033 0.347 2001 8 544.358 0.355 539.857 0.606 542.107 0.356 2001 9 544.557 0.390 539.988 0.494 542.273 0.309 2001 10 545.360 0.359 540.357 0.545 542.859 0.327 2001 11 546.050 0.481 541.330 0.754 543.690 0.447 2001 12 545.909 0.640 541.098 0.656 543.504 0.467 2002 1 545.972 0.609 541.326 0.616 543.649 0.442 2002 2 546.256 0.514 541.495 0.678 543.876 0.430 2002 3 545.904 0.543 541.216 0.774 543.560 0.465 2002 4 546.142 0.528 540.187 0.713 543.165 0.445 2002 5 545.480 0.459 540.507 0.598 542.993 0.382 2002 6 545.756 0.383 541.536 0.527 543.646 0.327 2002 7 545.014 0.383 541.499 0.502 543.256 0.308 2002 8 545.200 0.462 540.642 0.462 542.921 0.325 2002 9 545.301 0.375 540.928 0.492 543.115 0.306 2002 10 545.889 0.382 541.675 0.459 543.782 0.299 2002 11 546.383 0.359 541.925 0.488 544.154 0.298 2002 12 546.155 0.416 541.004 0.759 543.579 0.425 2003 1 545.785 0.574 540.764 0.456 543.274 0.361 2003 2 545.776 0.370 540.935 0.715 543.356 0.398 2003 3 545.815 0.403 541.310 0.532 543.563 0.331 2003 4 545.814 0.423 541.410 0.583 543.612 0.356 2003 5 545.167 0.583 540.215 0.594 542.691 0.406 2003 6 544.073 0.368 539.904 0.692 541.989 0.384 2003 7 544.620 0.346 540.284 0.529 542.452 0.317 2003 8 543.794 0.390 540.940 0.517 542.367 0.327 2003 9 545.079 0.390 541.320 0.509 543.199 0.324 2003 10 545.142 0.490 541.046 0.633 543.094 0.396 2003 11 545.656 0.439 541.897 0.491 543.777 0.328 2003 12 545.368 0.318 541.696 0.469 543.532 0.286 2004 1 545.057 0.393 541.206 0.777 543.131 0.440 2004 2 545.607 0.360 541.579 0.462 543.593 0.293 2004 3 544.790 0.374 541.199 0.602 542.995 0.356 2004 4 545.029 0.375 540.653 0.589 542.841 0.351 2004 5 544.361 0.419 540.178 0.521 542.270 0.340 2004 6 543.921 0.356 539.829 0.559 541.875 0.336 2004 7 543.874 0.340 540.350 0.484 542.112 0.290 2004 8 543.093 0.388 540.703 0.620 541.898 0.370 2004 9 543.146 0.441 540.067 0.710 541.607 0.418 2004 10 543.375 0.535 541.140 1.117 542.258 0.615 2004 11 544.858 0.521 540.951 0.679 542.905 0.427 2004 12 543.962 0.430 540.581 0.685 542.271 0.402 2005 1 544.012 0.478 540.415 0.720 542.214 0.431 2005 2 544.485 0.399 540.352 0.505 542.418 0.317 2005 3 544.519 0.539 540.350 1.113 542.434 0.607 2005 4 544.050 0.530 539.338 0.536 541.694 0.375 2005 5 543.374 0.436 538.849 0.654 541.112 0.391 2005 6 542.979 0.486 539.419 0.522 541.199 0.358 2005 7 542.655 0.356 539.090 0.752 540.873 0.410 2005 8 542.587 0.403 539.763 0.495 541.175 0.316 2005 9 542.200 0.396 539.832 0.476 541.016 0.303 2005 10 543.155 0.422 540.276 0.598 541.715 0.368 2005 11 543.626 0.450 540.899 0.765 542.262 0.429 2005 12 543.535 0.597 540.539 0.753 542.037 0.486 2006 1 543.559 0.547 540.449 0.803 542.004 0.500 2006 2 542.703 0.589 539.667 0.750 541.185 0.479 2006 3 542.661 0.581 539.657 0.785 541.159 0.496 2006 4 542.763 0.479 539.205 0.653 540.984 0.390 2006 5 542.210 0.398 538.976 0.555 540.593 0.346 2006 6 541.588 0.388 538.776 0.551 540.182 0.340 2006 7 541.394 0.373 538.619 0.549 540.006 0.331 2006 8 540.747 0.309 538.779 0.526 539.763 0.313 2006 9 540.633 0.379 538.553 0.587 539.593 0.345 2006 10 540.759 0.388 538.473 0.551 539.616 0.333 2006 11 540.839 0.398 538.685 0.636 539.762 0.373 2006 12 540.871 0.406 538.287 0.698 539.579 0.407 2007 1 540.718 0.411 537.859 0.574 539.288 0.352 2007 2 540.823 0.365 537.720 0.611 539.271 0.357 2007 3 540.130 0.375 537.821 0.659 538.975 0.378 2007 4 540.297 0.493 537.616 0.651 538.957 0.400 2007 5 540.101 0.426 536.616 0.570 538.358 0.356 2007 6 539.237 0.341 535.685 0.599 537.461 0.348 2007 7 538.583 0.395 535.900 0.528 537.242 0.336 2007 8 538.844 0.369 535.922 0.532 537.383 0.323 2007 9 538.460 0.370 536.476 0.698 537.468 0.392 2007 10 538.851 0.539 536.097 0.671 537.474 0.435 2007 11 538.000 0.460 536.223 0.738 537.112 0.434 2007 12 538.440 0.697 535.629 0.832 537.035 0.556 2008 1 537.877 0.531 535.755 0.804 536.816 0.483 2008 2 537.566 0.617 535.590 0.804 536.578 0.508 2008 3 537.365 0.478 534.527 0.767 535.946 0.451 2008 4 536.961 0.464 534.181 0.760 535.571 0.449 2008 5 536.776 0.425 534.283 0.563 535.529 0.347 2008 6 536.302 0.413 534.077 0.504 535.190 0.328 2008 7 536.069 0.390 534.082 0.502 535.076 0.313 2008 8 535.788 0.338 533.970 0.530 534.879 0.321 2008 9 536.399 0.328 534.242 0.699 535.321 0.389 2008 10 535.743 0.327 533.591 0.501 534.667 0.303 2008 11 536.018 0.452 533.750 0.555 534.884 0.342 2008 12 536.710 0.571 533.834 0.472 535.272 0.367 2009 1 536.063 0.525 533.665 0.660 534.864 0.421 2009 2 535.616 0.470 533.972 0.825 534.794 0.466 2009 3 535.636 0.473 533.231 0.755 534.434 0.446 2009 4 534.621 0.427 532.221 0.622 533.421 0.378 2009 5 534.416 0.368 532.102 0.470 533.259 0.292 2009 6 534.077 0.389 531.525 0.479 532.801 0.305 2009 7 533.170 0.393 530.634 0.508 531.902 0.323 2009 8 533.452 0.435 531.228 0.622 532.340 0.375 2009 9 532.876 0.385 530.848 0.561 531.862 0.343 2009 10 532.665 0.422 530.712 0.621 531.688 0.375 2009 11 532.905 0.336 531.043 0.723 531.974 0.400 2009 12 532.703 0.421 530.347 0.644 531.525 0.390 2010 1 532.442 0.456 530.369 0.771 531.405 0.445 2010 2 532.704 0.457 529.465 1.005 531.085 0.547 2010 3 532.722 0.519 530.864 0.804 531.793 0.484 2010 4 531.701 0.562 529.626 0.692 530.664 0.440 2010 5 530.772 0.381 529.024 0.731 529.898 0.420 2010 6 530.986 0.542 529.070 0.468 530.028 0.367 2010 7 530.628 0.377 528.726 0.606 529.677 0.360 2010 8 530.012 0.338 528.709 0.439 529.361 0.275 2010 9 529.965 0.384 528.533 0.534 529.249 0.333 2010 10 530.179 0.425 528.338 0.684 529.259 0.393 2010 11 529.847 0.479 527.966 0.683 528.907 0.408 2010 12 530.099 0.539 527.897 0.612 528.998 0.408 2011 1 530.274 0.465 528.177 0.749 529.226 0.450 2011 2 529.287 0.715 527.348 0.871 528.317 0.546 2011 3 528.858 0.370 527.006 0.521 527.932 0.323 2011 4 529.598 0.440 527.524 0.642 528.561 0.392 2011 5 529.002 0.448 527.211 0.534 528.106 0.341 2011 6 528.632 0.358 526.346 0.497 527.489 0.311 2011 7 528.163 0.383 526.287 0.572 527.225 0.341 2011 8 527.844 0.424 526.388 0.659 527.116 0.395 2011 9 527.686 0.383 526.079 0.513 526.883 0.305 2011 10 528.632 0.338 526.402 0.476 527.517 0.289 2011 11 527.622 0.360 525.947 0.531 526.785 0.317 2011 12 527.801 0.546 525.639 0.580 526.720 0.406 2012 1 527.122 0.499 525.283 0.819 526.202 0.474 2012 2 526.868 0.534 525.869 0.992 526.369 0.560 2012 3 526.563 0.479 524.537 0.522 525.550 0.353 2012 4 526.574 0.356 523.915 0.519 525.245 0.319 2012 5 525.891 0.455 523.440 0.644 524.665 0.393 2012 6 525.283 0.367 523.733 0.516 524.508 0.311 2012 7 524.442 0.472 522.829 0.540 523.635 0.359 2012 8 524.128 0.367 523.463 0.531 523.795 0.323 2012 9 524.992 0.387 523.674 0.594 524.333 0.353 2012 10 524.417 0.416 523.429 0.653 523.923 0.400 2012 11 524.311 0.352 522.746 0.581 523.529 0.334 2012 12 524.525 0.362 522.521 0.602 523.523 0.357 2013 1 524.354 0.422 522.584 0.575 523.469 0.348 2013 2 524.006 0.394 522.249 0.725 523.127 0.404 2013 3 523.777 0.309 521.810 0.465 522.793 0.271 2013 4 523.586 0.333 522.087 0.565 522.837 0.328 2013 5 523.255 0.401 521.235 0.586 522.245 0.361 2013 6 523.051 0.353 521.313 0.513 522.182 0.319 2013 7 522.391 0.369 521.145 0.577 521.768 0.339 2013 8 522.238 0.355 521.364 0.413 521.801 0.278 2013 9 522.122 0.357 521.040 0.593 521.581 0.343 2013 10 521.932 0.403 520.597 0.395 521.265 0.278 2013 11 521.580 0.355 520.332 0.516 520.956 0.320 2013 12 521.311 0.343 520.108 0.591 520.710 0.340 2014 1 521.489 0.322 519.958 0.425 520.723 0.267 2014 2 521.421 0.402 519.818 0.603 520.620 0.362 2014 3 521.547 0.409 519.620 0.531 520.584 0.336 2014 4 521.044 0.400 519.261 0.405 520.152 0.282 2014 5 521.408 0.335 518.864 0.607 520.136 0.344 2014 6 520.735 0.410 518.697 0.388 519.716 0.280 2014 7 520.455 0.308 518.625 0.461 519.540 0.278 2014 8 520.559 0.350 518.563 0.620 519.561 0.352 2014 9 520.399 0.305 518.907 0.482 519.653 0.287 2014 10 519.861 0.301 518.446 0.548 519.153 0.318 2014 11 519.788 0.304 518.440 0.461 519.114 0.280 2014 12 519.829 0.359 517.952 0.471 518.891 0.301 2015 1 519.655 0.356 518.003 1.208 518.829 0.633 2015 2 519.288 0.585 517.523 1.258 518.406 0.696 2015 3 519.128 0.700 517.163 1.020 518.145 0.614 2015 4 518.815 0.708 516.986 1.163 517.901 0.670 2015 5 518.646 0.880 516.799 1.214 517.722 0.757 2015 6 518.946 1.052 516.782 1.605 517.864 0.947 2015 7 518.260 0.920 516.490 1.657 517.375 0.951 2015 8 518.424 1.052 516.182 3.915 517.303 2.056 2015 9 518.021 0.691 516.311 1.673 517.166 0.913 2015 10 516.974 0.817 516.029 1.295 516.501 0.746 2015 11 517.274 0.637 515.815 1.706 516.545 0.925 2015 12 516.873 0.905 515.511 1.787 516.192 1.003 2016 1 516.892 1.705 515.257 2.213 516.074 1.406 2016 2 515.597 1.484 514.809 2.305 515.203 1.356 2016 3 515.146 1.651 514.282 3.800 514.714 2.104 2016 4 515.360 2.109 514.381 3.709 514.871 2.158 2016 5 515.155 1.507 514.412 5.000 514.783 2.584 2016 6 515.192 1.230 514.030 2.644 514.611 1.446 2016 7 514.863 1.142 513.521 2.538 514.192 1.401 2016 8 514.321 1.180 513.013 1.705 513.667 1.048 2016 9 514.363 1.204 512.999 2.222 513.681 1.277 2016 10 514.145 1.419 512.863 2.341 513.504 1.375 2016 11 514.044 1.252 512.377 2.308 513.211 1.284 2016 12 nan nan nan nan nan nan