# file: mhd_F11_MM.dat # # Atmospheric measurements of CCl3F (CFC-11, Chlorofluorocarbon-11, F11) # # Measurements are from the NOAA/ESRL/GMD/HATS flask program # (http://www.esrl.noaa.gov/gmd/hats/flask/flasks.html). # Instrument ID: Otto # # Location: MHD -- Mace Head, Ireland -- 53.33 N, 9.90 W, 25 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 "mhd_F11_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-11 # data from the NOAA/ESRL halocarbons flask program. # # Calibration scale: NOAA 2016 # 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 F11 in ppt # sd Standard deviation of the mean (or single-sample precision value) # n Number of samples # F11ottoMHDyr F11ottoMHDmon F11ottoMHDm F11ottoMHDsd F11ottoMHDn 1998 1 nan nan 0 1998 2 nan nan 0 1998 3 nan nan 0 1998 4 nan nan 0 1998 5 nan nan 0 1998 6 nan nan 0 1998 7 nan nan 0 1998 8 nan nan 0 1998 9 nan nan 0 1998 10 264.950 0.388 1 1998 11 263.694 0.520 2 1998 12 264.290 0.308 1 1999 1 264.250 0.468 1 1999 2 263.440 0.430 1 1999 3 nan nan 0 1999 4 262.280 0.434 1 1999 5 nan nan 0 1999 6 261.870 0.872 1 1999 7 261.945 0.594 2 1999 8 261.123 0.296 2 1999 9 nan nan 0 1999 10 nan nan 0 1999 11 nan nan 0 1999 12 nan nan 0 2000 1 nan nan 0 2000 2 nan nan 0 2000 3 nan nan 0 2000 4 nan nan 0 2000 5 nan nan 0 2000 6 nan nan 0 2000 7 nan nan 0 2000 8 nan nan 0 2000 9 nan nan 0 2000 10 nan nan 0 2000 11 nan nan 0 2000 12 nan nan 0 2001 1 nan nan 0 2001 2 nan nan 0 2001 3 nan nan 0 2001 4 nan nan 0 2001 5 259.730 0.475 1 2001 6 nan nan 0 2001 7 258.260 0.539 1 2001 8 257.739 0.538 2 2001 9 257.906 0.566 2 2001 10 258.300 0.484 1 2001 11 nan nan 0 2001 12 nan nan 0 2002 1 259.190 0.446 1 2002 2 258.618 0.455 3 2002 3 258.570 0.596 1 2002 4 258.026 0.383 2 2002 5 nan nan 0 2002 6 nan nan 0 2002 7 nan nan 0 2002 8 nan nan 0 2002 9 nan nan 0 2002 10 256.043 0.870 2 2002 11 256.325 0.728 2 2002 12 256.640 0.398 1 2003 1 255.534 0.316 2 2003 2 255.560 0.350 2 2003 3 255.594 0.322 3 2003 4 255.070 0.450 1 2003 5 255.016 0.530 2 2003 6 254.649 0.498 2 2003 7 254.935 0.460 2 2003 8 253.760 0.346 1 2003 9 253.650 0.303 3 2003 10 253.720 0.860 1 2003 11 253.601 0.465 3 2003 12 254.049 0.519 2 2004 1 253.252 0.300 2 2004 2 253.713 0.606 2 2004 3 252.723 0.453 2 2004 4 252.531 0.368 2 2004 5 252.694 0.368 2 2004 6 252.237 0.396 2 2004 7 252.465 0.417 2 2004 8 251.465 0.262 2 2004 9 251.411 0.456 2 2004 10 251.240 0.765 1 2004 11 251.200 0.481 2 2004 12 251.109 0.514 2 2005 1 251.310 0.443 1 2005 2 250.917 0.344 2 2005 3 251.710 0.511 1 2005 4 251.388 0.516 2 2005 5 250.967 0.394 3 2005 6 250.620 0.513 1 2005 7 250.325 0.434 2 2005 8 249.155 0.244 2 2005 9 249.369 0.622 2 2005 10 249.332 0.302 3 2005 11 249.630 0.312 1 2005 12 249.577 0.434 2 2006 1 249.420 0.430 1 2006 2 249.298 0.470 2 2006 3 248.808 0.501 2 2006 4 248.788 0.300 3 2006 5 249.070 0.445 2 2006 6 248.320 0.663 2 2006 7 247.813 0.387 2 2006 8 246.943 0.325 2 2006 9 246.880 0.440 2 2006 10 247.009 0.389 2 2006 11 247.445 0.537 2 2006 12 247.358 0.384 2 2007 1 247.340 0.329 1 2007 2 247.091 0.502 2 2007 3 247.008 0.388 2 2007 4 246.206 0.792 2 2007 5 246.419 0.495 2 2007 6 245.775 0.594 2 2007 7 245.238 0.935 2 2007 8 244.920 0.613 1 2007 9 244.834 0.272 2 2007 10 245.037 0.327 2 2007 11 245.210 0.500 2 2007 12 244.957 0.483 2 2008 1 245.194 0.315 2 2008 2 245.216 0.584 2 2008 3 244.708 0.451 3 2008 4 243.960 0.956 1 2008 5 nan nan 0 2008 6 243.461 0.450 3 2008 7 242.800 0.492 3 2008 8 243.020 0.614 1 2008 9 242.353 0.250 2 2008 10 242.932 0.350 2 2008 11 243.198 0.696 2 2008 12 243.374 0.370 2 2009 1 243.088 0.403 2 2009 2 243.064 0.311 2 2009 3 242.679 0.390 2 2009 4 242.274 0.317 2 2009 5 241.890 0.239 1 2009 6 nan nan 0 2009 7 241.214 0.308 2 2009 8 241.580 0.622 1 2009 9 241.018 0.466 2 2009 10 nan nan 0 2009 11 241.680 0.467 2 2009 12 241.490 0.452 1 2010 1 241.269 0.325 2 2010 2 240.910 0.284 2 2010 3 240.723 0.503 2 2010 4 240.582 0.239 2 2010 5 240.243 0.382 2 2010 6 239.273 0.415 2 2010 7 239.478 0.474 2 2010 8 238.715 0.281 2 2010 9 238.871 0.290 2 2010 10 239.820 0.699 1 2010 11 239.518 0.332 2 2010 12 239.380 0.559 1 2011 1 239.264 0.301 2 2011 2 238.873 0.573 2 2011 3 238.680 0.468 1 2011 4 238.460 0.382 2 2011 5 238.440 0.323 2 2011 6 237.821 0.370 2 2011 7 237.393 0.246 2 2011 8 237.055 0.419 2 2011 9 236.951 0.583 2 2011 10 237.158 0.421 2 2011 11 237.955 0.459 2 2011 12 238.119 0.968 2 2012 1 237.440 0.491 1 2012 2 237.072 0.599 3 2012 3 nan nan 0 2012 4 236.251 0.380 2 2012 5 236.108 0.380 3 2012 6 235.320 0.590 1 2012 7 234.930 0.387 2 2012 8 234.503 0.202 2 2012 9 234.692 0.983 2 2012 10 235.349 0.363 2 2012 11 235.391 0.392 2 2012 12 236.041 0.577 2 2013 1 235.485 0.545 2 2013 2 nan nan 0 2013 3 234.770 0.397 1 2013 4 234.410 0.870 2 2013 5 234.920 0.340 1 2013 6 nan nan 0 2013 7 233.620 1.766 1 2013 8 234.630 0.695 1 2013 9 nan nan 0 2013 10 234.060 1.313 1 2013 11 234.861 2.092 2 2013 12 234.816 0.561 2 2014 1 233.540 0.764 1 2014 2 233.590 0.485 1 2014 3 233.830 1.028 1 2014 4 233.380 1.247 1 2014 5 234.215 0.564 2 2014 6 nan nan 0 2014 7 233.664 0.422 2 2014 8 233.602 0.287 2 2014 9 233.140 0.252 1 2014 10 233.982 0.594 2 2014 11 233.724 0.368 2 2014 12 233.347 0.291 2 2015 1 233.899 0.438 2 2015 2 233.601 0.469 2 2015 3 nan nan 0 2015 4 233.630 1.726 1 2015 5 232.518 0.472 2 2015 6 232.784 0.453 2 2015 7 232.161 0.368 2 2015 8 231.941 0.388 2 2015 9 231.420 0.488 1 2015 10 231.844 0.489 2 2015 11 232.379 0.376 2 2015 12 232.430 0.291 1 2016 1 nan nan 0 2016 2 232.486 0.957 2 2016 3 232.270 0.991 1 2016 4 233.049 1.531 2 2016 5 231.658 1.197 2 2016 6 231.720 1.518 1 2016 7 230.716 0.765 2 2016 8 230.791 0.743 2 2016 9 230.037 0.438 2 2016 10 231.110 0.403 1 2016 11 230.965 0.827 2 2016 12 231.112 0.792 2 2017 1 230.905 0.417 2 2017 2 231.420 0.539 1 2017 3 230.058 0.799 2 2017 4 230.334 1.082 2 2017 5 230.551 0.461 3 2017 6 229.520 0.783 1 2017 7 229.834 1.046 2 2017 8 230.335 1.471 2 2017 9 229.803 0.467 2 2017 10 230.851 0.470 2 2017 11 230.249 0.604 2 2017 12 230.307 0.873 2 2018 1 229.702 0.506 2 2018 2 229.527 0.490 2 2018 3 228.939 0.460 2 2018 4 229.245 0.560 3 2018 5 230.220 0.595 1 2018 6 nan nan 0 2018 7 nan nan 0 2018 8 228.560 0.392 1 2018 9 227.632 0.629 2 2018 10 228.596 0.845 2 2018 11 229.139 0.784 2 2018 12 228.562 0.771 2 2019 1 228.100 0.617 1 2019 2 228.010 0.744 2 2019 3 227.747 0.389 3 2019 4 227.470 0.774 1 2019 5 nan nan 0 2019 6 227.400 1.066 1 2019 7 226.550 0.896 1 2019 8 226.900 0.619 2 2019 9 nan nan 0 2019 10 nan nan 0 2019 11 nan nan 0 2019 12 nan nan 0