# file: brw_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: BRW -- Barrow, Alaska -- 71.32 N, 156.61 W, 11 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 "brw_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 # F11ottoBRWyr F11ottoBRWmon F11ottoBRWm F11ottoBRWsd F11ottoBRWn 1995 1 268.890 0.475 1 1995 2 269.680 0.338 1 1995 3 268.835 0.566 2 1995 4 267.909 0.453 2 1995 5 268.200 0.395 3 1995 6 nan nan 0 1995 7 nan nan 0 1995 8 267.151 0.686 2 1995 9 266.892 0.328 3 1995 10 267.589 0.640 3 1995 11 268.020 0.866 1 1995 12 nan nan 0 1996 1 268.204 0.431 2 1996 2 267.921 0.570 4 1996 3 268.011 0.747 2 1996 4 267.949 0.427 4 1996 5 268.109 0.569 5 1996 6 267.640 0.643 4 1996 7 266.800 0.490 4 1996 8 266.779 0.298 3 1996 9 266.229 0.407 3 1996 10 266.315 0.551 4 1996 11 266.558 0.608 3 1996 12 266.904 0.405 4 1997 1 266.766 0.539 3 1997 2 266.643 0.349 4 1997 3 266.176 0.481 4 1997 4 266.436 0.364 4 1997 5 265.971 0.286 5 1997 6 265.621 0.300 4 1997 7 265.045 0.234 3 1997 8 264.617 0.258 5 1997 9 nan nan 0 1997 10 264.843 0.367 5 1997 11 265.589 0.587 3 1997 12 265.377 0.296 4 1998 1 265.530 0.375 4 1998 2 265.489 0.304 2 1998 3 264.871 0.277 3 1998 4 264.826 0.280 4 1998 5 264.456 0.356 4 1998 6 263.852 0.481 2 1998 7 262.675 0.239 4 1998 8 262.292 0.438 2 1998 9 263.212 0.497 2 1998 10 263.199 0.590 3 1998 11 263.310 0.422 3 1998 12 263.679 0.420 4 1999 1 263.935 0.523 5 1999 2 263.505 0.411 2 1999 3 263.259 0.508 3 1999 4 263.114 0.379 4 1999 5 262.984 0.523 4 1999 6 262.369 0.649 3 1999 7 261.450 0.313 4 1999 8 260.927 0.261 4 1999 9 260.975 0.211 3 1999 10 261.291 0.291 5 1999 11 262.110 0.527 2 1999 12 262.178 0.400 4 2000 1 262.681 0.425 3 2000 2 262.643 0.543 4 2000 3 262.039 0.205 4 2000 4 261.561 0.615 2 2000 5 261.170 0.403 4 2000 6 260.865 0.556 4 2000 7 260.034 0.550 4 2000 8 259.902 0.347 4 2000 9 259.651 0.215 4 2000 10 260.291 0.392 4 2000 11 260.546 0.292 4 2000 12 261.209 0.297 5 2001 1 260.789 0.343 2 2001 2 260.659 0.413 4 2001 3 260.445 0.281 3 2001 4 259.820 0.320 3 2001 5 259.489 0.267 4 2001 6 259.128 0.551 5 2001 7 258.449 0.363 3 2001 8 257.820 0.245 4 2001 9 257.709 0.372 4 2001 10 258.134 0.314 3 2001 11 258.503 0.239 5 2001 12 258.430 0.352 1 2002 1 258.656 0.257 4 2002 2 258.659 0.555 3 2002 3 258.289 0.412 5 2002 4 257.875 0.387 2 2002 5 257.361 0.438 4 2002 6 257.007 0.425 3 2002 7 256.540 0.273 3 2002 8 255.893 0.776 2 2002 9 255.514 0.323 2 2002 10 256.049 0.349 4 2002 11 256.269 0.353 5 2002 12 256.456 0.587 2 2003 1 255.486 0.419 2 2003 2 255.946 0.312 5 2003 3 255.582 0.331 3 2003 4 255.322 0.360 3 2003 5 255.110 0.262 7 2003 6 254.807 0.390 3 2003 7 254.052 0.321 3 2003 8 253.681 0.518 5 2003 9 253.041 0.330 3 2003 10 253.378 0.263 5 2003 11 253.690 0.210 4 2003 12 254.075 0.216 3 2004 1 253.767 0.407 3 2004 2 253.278 0.306 3 2004 3 253.470 0.301 5 2004 4 253.448 0.410 4 2004 5 253.151 0.567 2 2004 6 252.316 0.335 4 2004 7 251.823 0.394 4 2004 8 251.070 0.240 4 2004 9 251.204 0.349 4 2004 10 251.078 0.458 3 2004 11 251.142 0.743 2 2004 12 nan nan 0 2005 1 251.701 0.257 4 2005 2 251.651 0.208 4 2005 3 251.213 0.282 5 2005 4 251.156 0.395 3 2005 5 250.676 0.393 4 2005 6 250.424 0.506 4 2005 7 249.719 0.790 3 2005 8 249.337 0.181 3 2005 9 249.247 0.240 5 2005 10 249.157 0.386 4 2005 11 249.438 0.555 4 2005 12 249.716 0.396 5 2006 1 249.543 0.500 3 2006 2 249.178 0.378 4 2006 3 249.033 0.387 3 2006 4 249.109 0.342 4 2006 5 248.827 0.445 4 2006 6 248.368 0.563 3 2006 7 247.606 0.348 4 2006 8 246.864 0.297 5 2006 9 246.622 0.445 4 2006 10 246.941 0.417 4 2006 11 247.376 0.380 4 2006 12 247.325 0.398 4 2007 1 247.473 0.585 2 2007 2 247.276 0.583 4 2007 3 247.196 0.327 4 2007 4 246.438 0.345 4 2007 5 246.550 0.360 1 2007 6 246.126 0.577 3 2007 7 245.203 0.865 2 2007 8 244.786 0.395 2 2007 9 244.787 0.333 4 2007 10 244.805 0.336 4 2007 11 245.269 0.410 2 2007 12 245.470 0.397 3 2008 1 245.982 0.406 2 2008 2 245.449 0.504 4 2008 3 nan nan 0 2008 4 244.660 0.430 1 2008 5 244.096 0.503 5 2008 6 243.826 0.312 4 2008 7 243.279 0.455 4 2008 8 242.888 0.330 2 2008 9 242.730 0.341 2 2008 10 242.906 0.321 4 2008 11 243.181 0.379 3 2008 12 243.650 0.320 5 2009 1 242.866 0.517 3 2009 2 243.037 0.352 4 2009 3 243.143 0.379 3 2009 4 242.322 0.362 2 2009 5 242.125 0.236 4 2009 6 241.751 0.344 4 2009 7 241.237 0.307 3 2009 8 241.158 0.290 4 2009 9 240.914 0.283 5 2009 10 241.454 0.175 3 2009 11 241.418 0.397 5 2009 12 241.466 0.316 4 2010 1 241.498 0.232 5 2010 2 241.292 0.287 4 2010 3 241.240 0.396 4 2010 4 240.905 0.478 5 2010 5 240.643 0.367 4 2010 6 239.962 0.470 4 2010 7 239.154 0.343 5 2010 8 239.045 0.320 3 2010 9 238.697 0.380 3 2010 10 238.954 0.341 4 2010 11 239.277 0.292 4 2010 12 239.560 0.338 4 2011 1 240.090 0.503 4 2011 2 239.804 0.595 3 2011 3 239.270 0.520 3 2011 4 nan nan 0 2011 5 238.293 0.341 3 2011 6 237.818 0.327 4 2011 7 237.570 0.339 5 2011 8 236.842 0.351 3 2011 9 236.875 0.268 3 2011 10 236.939 0.326 4 2011 11 237.480 0.222 5 2011 12 237.881 0.337 2 2012 1 237.641 0.389 4 2012 2 237.609 0.549 4 2012 3 237.269 0.458 3 2012 4 236.592 0.460 2 2012 5 236.517 0.278 5 2012 6 235.971 0.264 4 2012 7 235.120 0.397 4 2012 8 234.792 0.309 3 2012 9 234.426 0.269 4 2012 10 235.176 0.356 4 2012 11 235.618 0.336 5 2012 12 235.929 0.409 5 2013 1 235.918 0.498 4 2013 2 235.808 0.415 4 2013 3 235.345 0.345 4 2013 4 234.769 0.338 3 2013 5 234.682 0.458 4 2013 6 234.679 0.261 4 2013 7 234.302 0.411 4 2013 8 233.840 1.201 1 2013 9 nan nan 0 2013 10 nan nan 0 2013 11 234.510 0.315 2 2013 12 234.529 0.421 3 2014 1 233.782 0.457 4 2014 2 233.708 0.307 3 2014 3 234.111 0.357 4 2014 4 233.659 1.129 2 2014 5 233.953 0.303 4 2014 6 233.864 0.263 5 2014 7 233.490 0.333 4 2014 8 232.994 0.333 2 2014 9 233.173 0.382 4 2014 10 233.481 0.249 4 2014 11 234.073 0.312 4 2014 12 233.877 0.374 5 2015 1 233.773 0.411 4 2015 2 233.480 0.422 5 2015 3 232.823 0.500 4 2015 4 232.406 0.368 4 2015 5 232.825 0.514 3 2015 6 232.859 0.333 5 2015 7 232.253 0.415 4 2015 8 231.458 0.418 4 2015 9 231.298 0.334 4 2015 10 231.911 0.304 5 2015 11 232.274 0.383 5 2015 12 232.334 0.315 4 2016 1 232.047 0.424 4 2016 2 231.300 0.398 1 2016 3 231.889 1.044 3 2016 4 231.797 0.976 4 2016 5 232.262 1.245 4 2016 6 232.444 0.857 5 2016 7 231.388 1.032 2 2016 8 230.907 0.547 5 2016 9 230.938 0.671 3 2016 10 230.522 0.771 2 2016 11 230.905 0.500 3 2016 12 231.233 0.356 3 2017 1 231.067 0.706 4 2017 2 231.420 0.504 3 2017 3 230.518 0.527 4 2017 4 230.636 0.524 5 2017 5 229.694 0.415 3 2017 6 230.626 0.794 4 2017 7 229.615 0.496 4 2017 8 229.474 0.519 4 2017 9 229.044 0.362 3 2017 10 229.894 0.377 4 2017 11 230.512 0.594 5 2017 12 230.384 0.568 4 2018 1 230.848 0.478 4 2018 2 229.823 0.626 5 2018 3 229.072 0.469 4 2018 4 229.784 0.625 6 2018 5 229.833 0.466 4 2018 6 228.842 0.546 2 2018 7 nan nan 0 2018 8 nan nan 0 2018 9 228.031 0.381 3 2018 10 227.916 0.581 5 2018 11 229.059 0.779 4 2018 12 229.077 0.579 3 2019 1 228.333 0.497 4 2019 2 228.069 0.495 4 2019 3 228.289 0.450 4 2019 4 227.784 0.621 4 2019 5 228.011 0.630 5 2019 6 227.358 0.318 4 2019 7 226.758 0.709 5 2019 8 226.890 0.721 1 2019 9 nan nan 0 2019 10 nan nan 0 2019 11 nan nan 0 2019 12 nan nan 0 2020 1 nan nan 0 2020 2 nan nan 0 2020 3 nan nan 0 2020 4 nan nan 0 2020 5 nan nan 0 2020 6 nan nan 0 2020 7 nan nan 0 2020 8 nan nan 0 2020 9 nan nan 0 2020 10 nan nan 0 2020 11 nan nan 0 2020 12 nan nan 0