# file: sum_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: SUM -- Summit, Greenland -- 72.58 N, 38.48 W, 3217.54 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 "sum_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 # F12ottoSUMyr F12ottoSUMmon F12ottoSUMm F12ottoSUMsd F12ottoSUMn 2004 1 nan nan 0 2004 2 nan nan 0 2004 3 nan nan 0 2004 4 nan nan 0 2004 5 nan nan 0 2004 6 542.790 0.935 1 2004 7 542.760 1.025 1 2004 8 541.790 1.018 1 2004 9 542.287 0.972 2 2004 10 543.362 1.282 2 2004 11 544.396 1.397 2 2004 12 543.492 1.307 2 2005 1 543.940 1.507 2 2005 2 543.854 1.844 2 2005 3 542.509 1.185 2 2005 4 543.490 0.755 1 2005 5 542.488 1.024 2 2005 6 542.043 0.606 2 2005 7 nan nan 0 2005 8 542.314 0.909 4 2005 9 nan nan 0 2005 10 542.399 1.198 2 2005 11 542.172 1.246 2 2005 12 542.290 2.672 1 2006 1 543.049 1.437 2 2006 2 542.179 0.693 2 2006 3 541.780 0.834 1 2006 4 542.014 0.916 2 2006 5 541.751 0.840 4 2006 6 540.050 0.995 3 2006 7 nan nan 0 2006 8 539.931 0.954 2 2006 9 539.260 0.930 1 2006 10 539.869 0.836 2 2006 11 540.790 0.788 1 2006 12 540.578 0.790 2 2007 1 540.880 0.875 2 2007 2 540.575 1.174 2 2007 3 540.311 1.201 2 2007 4 538.980 1.044 1 2007 5 538.660 1.028 2 2007 6 538.018 0.772 2 2007 7 537.718 0.801 3 2007 8 537.263 0.606 4 2007 9 537.839 1.103 5 2007 10 537.352 1.137 2 2007 11 537.524 0.941 2 2007 12 538.008 1.594 2 2008 1 537.527 1.349 2 2008 2 536.626 1.262 2 2008 3 536.582 1.514 2 2008 4 537.158 0.805 2 2008 5 536.195 0.812 2 2008 6 535.523 0.809 6 2008 7 534.711 0.891 4 2008 8 534.571 0.948 4 2008 9 534.893 1.218 3 2008 10 534.659 0.890 2 2008 11 536.192 1.093 2 2008 12 534.913 1.460 2 2009 1 535.201 1.513 2 2009 2 535.800 1.493 1 2009 3 534.646 0.742 2 2009 4 534.070 1.289 2 2009 5 533.302 0.920 2 2009 6 532.683 1.044 2 2009 7 531.947 0.945 5 2009 8 531.362 0.695 5 2009 9 531.260 0.798 5 2009 10 531.175 1.391 2 2009 11 532.144 1.430 2 2009 12 531.856 1.092 2 2010 1 531.352 1.028 2 2010 2 530.342 0.989 2 2010 3 531.312 1.086 2 2010 4 530.471 0.668 2 2010 5 530.611 0.946 2 2010 6 529.605 1.200 2 2010 7 529.398 0.878 3 2010 8 528.641 1.149 5 2010 9 528.452 0.890 4 2010 10 528.862 1.193 2 2010 11 529.353 1.038 2 2010 12 529.639 0.938 2 2011 1 529.470 0.936 2 2011 2 528.477 0.934 2 2011 3 528.713 1.036 2 2011 4 528.094 0.881 2 2011 5 528.549 0.615 2 2011 6 527.332 0.920 2 2011 7 526.535 0.649 5 2011 8 526.715 0.960 3 2011 9 526.510 0.843 4 2011 10 526.660 1.200 1 2011 11 527.430 0.688 1 2011 12 526.626 0.970 2 2012 1 527.296 0.849 2 2012 2 527.021 0.869 2 2012 3 526.190 0.701 1 2012 4 526.108 1.672 2 2012 5 525.515 1.172 2 2012 6 523.550 0.785 2 2012 7 523.118 0.760 4 2012 8 523.110 0.667 1 2012 9 523.660 1.133 2 2012 10 523.307 0.804 2 2012 11 523.380 1.682 1 2012 12 523.070 1.808 1 2013 1 nan nan 0 2013 2 522.210 1.418 1 2013 3 521.634 1.070 2 2013 4 521.356 0.710 2 2013 5 521.480 0.816 1 2013 6 nan nan 0 2013 7 520.770 0.831 4 2013 8 520.575 0.821 4 2013 9 520.582 1.019 5 2013 10 520.757 1.089 2 2013 11 520.416 0.767 2 2013 12 520.809 0.720 3 2014 1 520.690 0.881 1 2014 2 520.510 0.893 2 2014 3 519.911 0.826 2 2014 4 520.761 0.533 2 2014 5 519.433 0.959 2 2014 6 519.111 0.774 2 2014 7 519.037 0.634 5 2014 8 519.100 0.823 1 2014 9 nan nan 0 2014 10 nan nan 0 2014 11 nan nan 0 2014 12 nan nan 0 2015 1 nan nan 0 2015 2 nan nan 0 2015 3 nan nan 0 2015 4 nan nan 0 2015 5 nan nan 0 2015 6 nan nan 0 2015 7 nan nan 0 2015 8 nan nan 0 2015 9 515.991 4.734 2 2015 10 nan nan 0 2015 11 515.296 3.169 2 2015 12 nan nan 0 2016 1 nan nan 0 2016 2 nan nan 0 2016 3 nan nan 0 2016 4 nan nan 0 2016 5 nan nan 0 2016 6 nan nan 0 2016 7 nan nan 0 2016 8 nan nan 0 2016 9 511.530 1.952 1 2016 10 nan nan 0 2016 11 nan nan 0 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