# file: lef_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: 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_F12_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: 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 # # Missing value: "nan" # # Data Columns: # yr Year # mon Month # m Monthly mean concentration of F12 in ppt # sd Standard deviation of the mean (or single-sample precision value) # n Number of samples # F12ottoLEFyr F12ottoLEFmon F12ottoLEFm F12ottoLEFsd F12ottoLEFn 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 8 600.430 0.787 1 1996 9 nan nan 0 1996 10 545.330 0.925 1 1996 11 nan nan 0 1996 12 539.480 0.901 1 1997 1 nan nan 0 1997 2 539.030 1.130 1 1997 3 541.500 0.893 1 1997 4 nan nan 0 1997 5 537.440 1.050 1 1997 6 542.780 1.897 1 1997 7 540.970 1.473 1 1997 8 540.540 35.715 1 1997 9 536.240 1.044 1 1997 10 nan nan 0 1997 11 540.760 1.655 1 1997 12 541.860 1.710 1 1998 1 542.596 1.346 2 1998 2 541.300 0.841 1 1998 3 nan nan 0 1998 4 539.900 2.490 1 1998 5 543.793 5.197 2 1998 6 542.155 2.533 3 1998 7 538.363 0.664 2 1998 8 542.740 1.556 2 1998 9 541.550 0.874 1 1998 10 543.200 1.180 1 1998 11 543.562 2.694 2 1998 12 543.900 1.675 1 1999 1 542.030 1.169 1 1999 2 544.345 1.853 3 1999 3 543.620 2.157 1 1999 4 543.910 1.305 1 1999 5 542.196 1.980 2 1999 6 542.497 1.438 4 1999 7 541.387 1.492 2 1999 8 542.470 0.773 1 1999 9 545.691 3.242 3 1999 10 545.432 3.769 2 1999 11 543.865 1.169 2 1999 12 547.865 7.552 2 2000 1 547.030 1.702 1 2000 2 546.741 2.931 3 2000 3 552.402 8.450 2 2000 4 544.322 1.869 3 2000 5 546.933 1.523 3 2000 6 547.530 1.647 1 2000 7 548.608 1.867 3 2000 8 544.691 1.808 3 2000 9 547.609 1.929 3 2000 10 547.760 0.627 1 2000 11 548.116 3.405 3 2000 12 546.724 2.093 2 2001 1 546.976 1.248 3 2001 2 546.426 0.711 3 2001 3 545.838 0.909 2 2001 4 546.427 1.805 3 2001 5 545.738 1.143 4 2001 6 545.285 2.235 3 2001 7 544.699 1.079 5 2001 8 549.056 3.779 4 2001 9 544.423 0.784 3 2001 10 547.282 1.974 4 2001 11 545.902 1.690 3 2001 12 550.931 3.189 2 2002 1 547.116 1.188 4 2002 2 546.775 1.154 3 2002 3 546.595 1.313 4 2002 4 547.672 1.200 3 2002 5 548.360 1.648 4 2002 6 546.890 0.939 4 2002 7 549.874 1.869 4 2002 8 546.791 2.083 3 2002 9 546.621 1.649 4 2002 10 545.640 0.891 5 2002 11 547.058 0.846 3 2002 12 547.990 1.255 3 2003 1 546.582 0.986 4 2003 2 547.036 1.241 2 2003 3 545.872 0.946 4 2003 4 545.974 0.753 4 2003 5 545.365 1.673 5 2003 6 544.407 1.543 4 2003 7 544.176 0.658 4 2003 8 544.241 0.700 4 2003 9 544.601 0.856 4 2003 10 545.501 2.378 3 2003 11 545.458 1.395 2 2003 12 546.493 1.036 3 2004 1 546.502 0.825 3 2004 2 547.608 1.486 2 2004 3 546.551 1.264 4 2004 4 544.856 0.986 3 2004 5 544.774 0.920 4 2004 6 543.789 0.756 4 2004 7 543.627 0.839 4 2004 8 544.404 2.173 3 2004 9 544.674 2.002 4 2004 10 545.056 1.284 4 2004 11 547.879 2.738 4 2004 12 544.688 2.212 5 2005 1 544.997 0.909 3 2005 2 544.452 1.070 5 2005 3 544.754 1.464 2 2005 4 544.531 1.027 4 2005 5 543.707 0.930 5 2005 6 543.792 0.861 3 2005 7 543.470 2.228 4 2005 8 542.313 1.495 5 2005 9 542.387 1.285 4 2005 10 545.281 2.372 4 2005 11 544.229 1.386 4 2005 12 543.868 2.237 2 2006 1 544.201 2.033 3 2006 2 543.853 0.944 4 2006 3 543.277 1.330 3 2006 4 543.738 1.031 3 2006 5 543.049 0.875 4 2006 6 541.579 1.208 4 2006 7 541.872 1.180 4 2006 8 540.713 0.614 5 2006 9 540.226 1.073 3 2006 10 541.116 0.747 4 2006 11 540.780 1.677 5 2006 12 541.109 0.739 3 2007 1 541.392 1.239 3 2007 2 540.647 1.486 4 2007 3 540.979 1.443 4 2007 4 541.311 1.501 3 2007 5 539.975 2.680 2 2007 6 539.178 1.911 4 2007 7 539.210 0.870 4 2007 8 538.974 0.967 4 2007 9 538.291 1.540 4 2007 10 539.414 0.837 4 2007 11 538.185 0.975 3 2007 12 537.713 1.114 3 2008 1 539.397 0.929 3 2008 2 537.508 1.124 4 2008 3 537.277 1.164 4 2008 4 537.150 1.075 5 2008 5 537.068 0.792 3 2008 6 536.098 1.150 4 2008 7 535.598 0.738 4 2008 8 537.507 2.172 4 2008 9 537.322 0.584 2 2008 10 535.929 0.759 5 2008 11 537.034 0.647 4 2008 12 536.696 1.563 5 2009 1 536.599 1.182 2 2009 2 536.020 1.675 4 2009 3 535.826 1.188 4 2009 4 535.150 0.800 4 2009 5 534.363 0.958 2 2009 6 533.959 0.871 3 2009 7 533.444 0.944 3 2009 8 533.209 0.805 4 2009 9 533.151 1.783 4 2009 10 533.571 1.018 4 2009 11 535.256 1.307 3 2009 12 532.903 1.307 3 2010 1 533.751 1.185 3 2010 2 532.946 1.103 4 2010 3 533.534 1.180 3 2010 4 532.057 1.680 4 2010 5 530.792 0.712 4 2010 6 530.758 1.389 4 2010 7 530.319 2.215 3 2010 8 530.106 1.263 2 2010 9 529.838 0.729 3 2010 10 530.227 0.885 4 2010 11 530.587 1.288 3 2010 12 530.541 1.034 3 2011 1 530.903 1.266 4 2011 2 529.723 1.104 3 2011 3 529.064 1.099 4 2011 4 528.300 0.912 3 2011 5 529.478 0.938 4 2011 6 528.020 0.733 2 2011 7 528.129 0.959 3 2011 8 527.986 0.619 3 2011 9 527.516 1.220 3 2011 10 529.545 2.089 3 2011 11 528.440 0.800 3 2011 12 525.730 1.246 1 2012 1 528.707 1.386 2 2012 2 527.812 0.817 4 2012 3 526.425 0.914 4 2012 4 526.654 0.877 3 2012 5 526.706 1.091 3 2012 6 525.208 1.399 4 2012 7 523.087 0.525 2 2012 8 523.908 1.319 3 2012 9 524.345 1.158 3 2012 10 524.649 0.848 3 2012 11 524.357 1.598 2 2012 12 524.763 1.090 2 2013 1 523.535 0.771 2 2013 2 524.100 0.784 3 2013 3 524.187 0.901 3 2013 4 523.685 0.654 3 2013 5 523.727 1.095 4 2013 6 523.450 0.886 1 2013 7 522.634 0.521 3 2013 8 520.840 1.070 1 2013 9 522.261 1.626 3 2013 10 523.790 1.087 1 2013 11 522.850 0.936 1 2013 12 521.583 1.152 2 2014 1 521.051 1.182 3 2014 2 521.725 1.144 2 2014 3 522.986 1.225 4 2014 4 521.546 0.914 4 2014 5 521.988 1.209 2 2014 6 520.608 0.778 3 2014 7 520.189 0.579 2 2014 8 520.485 1.086 4 2014 9 521.145 0.766 4 2014 10 519.614 0.726 4 2014 11 519.422 0.690 3 2014 12 519.519 0.711 2 2015 1 519.375 1.147 2 2015 2 519.420 1.967 2 2015 3 518.560 1.353 1 2015 4 nan nan 0 2015 5 nan nan 0 2015 6 518.332 3.073 3 2015 7 nan nan 0 2015 8 518.262 1.757 2 2015 9 517.776 1.502 5 2015 10 518.690 1.944 1 2015 11 nan nan 0 2015 12 518.040 2.338 1 2016 1 517.770 2.417 1 2016 2 514.430 1.195 1 2016 3 nan nan 0 2016 4 nan nan 0 2016 5 514.823 3.517 2 2016 6 nan nan 0 2016 7 515.290 7.317 1 2016 8 nan nan 0 2016 9 nan nan 0 2016 10 nan nan 0 2016 11 512.670 1.974 1 2016 12 nan nan 0 2017 1 nan nan 0 2017 2 nan nan 0 2017 3 nan nan 0 2017 4 nan nan 0 2017 5 nan nan 0 2017 6 nan nan 0 2017 7 nan nan 0 2017 8 nan nan 0 2017 9 nan nan 0 2017 10 nan nan 0 2017 11 nan nan 0 2017 12 nan nan 0