# file: psa_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: PSA -- Palmer Station, Antarctica -- 64.92 S, 64.00 W, 10 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 "psa_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 # F12ottoPSAyr F12ottoPSAmon F12ottoPSAm F12ottoPSAsd F12ottoPSAn 2001 1 nan nan 0 2001 2 nan nan 0 2001 3 538.040 1.364 1 2001 4 537.980 1.377 2 2001 5 537.591 1.013 2 2001 6 538.257 1.171 2 2001 7 539.140 1.412 1 2001 8 538.558 1.610 3 2001 9 539.138 1.051 2 2001 10 539.923 1.153 2 2001 11 nan nan 0 2001 12 540.351 0.821 2 2002 1 539.935 1.449 2 2002 2 539.815 1.391 2 2002 3 539.540 1.000 1 2002 4 539.394 1.030 2 2002 5 539.210 0.822 1 2002 6 540.415 1.633 2 2002 7 540.298 0.857 2 2002 8 540.214 1.089 2 2002 9 540.896 0.820 2 2002 10 541.399 1.023 2 2002 11 540.998 1.017 2 2002 12 540.720 0.910 2 2003 1 541.020 0.917 1 2003 2 nan nan 0 2003 3 nan nan 0 2003 4 538.820 1.190 1 2003 5 540.620 1.454 1 2003 6 539.473 0.864 3 2003 7 nan nan 0 2003 8 540.509 1.264 2 2003 9 540.183 0.929 2 2003 10 540.150 1.183 1 2003 11 540.030 0.817 2 2003 12 539.685 0.795 2 2004 1 539.312 0.825 3 2004 2 539.087 0.703 2 2004 3 539.038 0.762 2 2004 4 538.670 0.976 3 2004 5 538.988 1.040 2 2004 6 538.711 0.625 3 2004 7 539.056 1.027 3 2004 8 539.660 2.088 1 2004 9 539.190 2.040 2 2004 10 539.083 0.919 2 2004 11 539.626 0.822 2 2004 12 539.429 1.364 2 2005 1 538.801 1.110 2 2005 2 539.584 0.792 3 2005 3 537.684 1.124 2 2005 4 537.502 0.825 2 2005 5 537.968 0.778 2 2005 6 537.916 0.812 2 2005 7 539.498 1.593 2 2005 8 538.621 0.781 3 2005 9 538.900 1.053 2 2005 10 539.010 1.252 2 2005 11 538.996 1.639 2 2005 12 539.497 1.243 2 2006 1 538.916 1.239 2 2006 2 538.913 1.420 3 2006 3 538.196 0.922 2 2006 4 537.690 1.196 1 2006 5 537.785 0.909 2 2006 6 537.622 0.971 2 2006 7 537.344 0.913 3 2006 8 537.590 0.890 1 2006 9 538.400 1.245 1 2006 10 538.207 1.235 2 2006 11 538.749 1.328 2 2006 12 538.220 1.442 1 2007 1 537.785 1.126 2 2007 2 536.630 1.061 2 2007 3 536.239 1.131 2 2007 4 535.792 0.886 2 2007 5 534.870 0.925 3 2007 6 534.800 1.266 2 2007 7 534.680 1.651 1 2007 8 534.882 0.878 2 2007 9 535.461 1.770 2 2007 10 534.997 1.138 2 2007 11 535.467 1.314 2 2007 12 534.715 1.555 2 2008 1 534.711 0.909 2 2008 2 534.177 1.335 2 2008 3 533.990 0.894 2 2008 4 533.437 0.874 2 2008 5 533.382 1.037 2 2008 6 533.546 1.121 2 2008 7 533.692 0.810 2 2008 8 532.910 1.451 1 2008 9 533.669 1.011 2 2008 10 532.985 1.040 2 2008 11 532.316 1.026 2 2008 12 532.950 0.603 1 2009 1 531.520 1.302 1 2009 2 532.541 1.604 2 2009 3 nan nan 0 2009 4 530.190 1.383 2 2009 5 529.810 0.946 1 2009 6 530.621 0.664 2 2009 7 529.818 0.702 2 2009 8 530.154 1.132 2 2009 9 529.766 0.801 2 2009 10 530.170 0.778 2 2009 11 530.633 1.755 2 2009 12 529.031 1.261 2 2010 1 528.480 2.029 1 2010 2 530.460 3.204 1 2010 3 529.110 1.198 1 2010 4 528.118 0.953 2 2010 5 527.693 0.860 3 2010 6 528.313 0.638 2 2010 7 527.826 1.247 2 2010 8 527.280 1.054 1 2010 9 527.677 1.061 2 2010 10 527.820 1.056 1 2010 11 526.952 1.200 3 2010 12 526.994 0.900 2 2011 1 526.165 0.876 2 2011 2 526.720 1.004 2 2011 3 526.065 0.714 2 2011 4 525.579 0.858 3 2011 5 525.115 0.965 2 2011 6 524.947 0.890 2 2011 7 525.671 1.008 2 2011 8 525.049 1.046 2 2011 9 524.702 1.266 2 2011 10 526.299 0.778 2 2011 11 525.739 1.013 2 2011 12 525.286 1.357 3 2012 1 524.457 1.056 2 2012 2 524.180 1.056 2 2012 3 523.034 0.783 2 2012 4 522.647 0.936 3 2012 5 522.605 1.776 2 2012 6 523.114 0.956 2 2012 7 522.344 1.046 2 2012 8 522.634 0.854 2 2012 9 523.330 1.338 2 2012 10 523.633 1.340 2 2012 11 522.596 0.967 2 2012 12 520.871 0.915 2 2013 1 nan nan 0 2013 2 521.450 2.688 1 2013 3 nan nan 0 2013 4 521.690 2.100 2 2013 5 520.472 0.946 2 2013 6 520.494 0.904 2 2013 7 520.284 1.032 2 2013 8 520.918 0.831 2 2013 9 519.822 0.787 2 2013 10 518.985 1.123 2 2013 11 520.381 0.866 2 2013 12 519.569 0.932 2 2014 1 518.699 0.959 2 2014 2 518.714 0.888 2 2014 3 518.280 0.737 1 2014 4 517.583 0.655 3 2014 5 517.139 0.822 2 2014 6 517.070 0.664 2 2014 7 517.187 0.772 2 2014 8 517.196 0.715 2 2014 9 517.530 0.672 2 2014 10 517.311 1.018 2 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 6 517.010 3.403 1 2015 7 516.060 4.978 1 2015 8 515.340 1.533 1 2015 9 515.470 2.207 1 2015 10 nan nan 0 2015 11 nan nan 0 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 nan nan 0 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