# file: cgo_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: CGO -- Cape Grim, Tasmania -- 40.68 S, 144.69 E, 94 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 "cgo_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 # F11ottoCGOyr F11ottoCGOmon F11ottoCGOm F11ottoCGOsd F11ottoCGOn 1994 1 nan nan 0 1994 2 nan nan 0 1994 3 nan nan 0 1994 4 nan nan 0 1994 5 nan nan 0 1994 6 nan nan 0 1994 7 nan nan 0 1994 8 nan nan 0 1994 9 nan nan 0 1994 10 nan nan 0 1994 11 263.810 0.522 1 1994 12 263.702 0.189 3 1995 1 nan nan 0 1995 2 263.056 0.474 2 1995 3 262.875 0.378 4 1995 4 262.629 0.323 3 1995 5 262.870 0.198 1 1995 6 263.289 0.330 3 1995 7 262.720 0.955 1 1995 8 nan nan 0 1995 9 264.030 0.657 1 1995 10 263.297 0.466 3 1995 11 263.402 0.387 2 1995 12 nan nan 0 1996 1 262.500 0.907 1 1996 2 262.730 0.406 3 1996 3 262.909 0.514 4 1996 4 263.172 0.460 2 1996 5 263.357 0.414 4 1996 6 262.758 0.435 3 1996 7 262.848 0.445 3 1996 8 262.978 0.344 4 1996 9 263.007 0.351 4 1996 10 262.387 0.467 3 1996 11 262.737 0.426 2 1996 12 262.660 0.479 1 1997 1 262.251 0.529 2 1997 2 262.436 0.597 2 1997 3 262.591 0.529 5 1997 4 262.600 0.530 1 1997 5 262.052 0.303 4 1997 6 262.493 0.389 2 1997 7 262.142 0.247 5 1997 8 261.950 0.530 2 1997 9 262.233 0.407 2 1997 10 nan nan 0 1997 11 261.721 0.445 4 1997 12 261.614 0.471 4 1998 1 261.089 0.362 2 1998 2 260.975 0.534 3 1998 3 260.658 0.433 5 1998 4 260.208 0.683 4 1998 5 259.913 0.406 3 1998 6 260.317 0.230 4 1998 7 260.693 0.345 3 1998 8 261.156 0.615 2 1998 9 261.035 0.337 3 1998 10 261.195 0.441 5 1998 11 261.252 0.464 5 1998 12 260.668 0.550 2 1999 1 260.508 0.456 2 1999 2 260.050 0.247 3 1999 3 259.891 0.345 5 1999 4 259.701 0.246 4 1999 5 259.803 0.468 4 1999 6 259.427 0.317 4 1999 7 259.317 0.308 3 1999 8 259.730 0.300 3 1999 9 259.547 0.253 5 1999 10 259.488 0.384 6 1999 11 259.940 0.334 3 1999 12 259.408 0.467 2 2000 1 258.990 0.536 1 2000 2 258.828 0.327 3 2000 3 258.446 0.395 4 2000 4 257.833 0.420 3 2000 5 257.541 0.483 4 2000 6 257.484 0.537 3 2000 7 257.343 0.773 3 2000 8 257.346 0.269 4 2000 9 257.434 0.289 4 2000 10 257.495 0.271 4 2000 11 257.561 0.336 4 2000 12 257.255 0.238 3 2001 1 256.983 0.414 4 2001 2 256.232 0.322 3 2001 3 255.806 0.261 3 2001 4 255.541 0.298 3 2001 5 256.041 0.424 2 2001 6 255.969 0.402 4 2001 7 255.887 0.297 3 2001 8 255.865 0.464 3 2001 9 255.887 0.252 4 2001 10 255.673 0.262 5 2001 11 255.725 0.408 3 2001 12 255.573 0.299 2 2002 1 255.385 0.248 5 2002 2 255.025 0.390 4 2002 3 255.133 0.231 4 2002 4 254.123 0.355 2 2002 5 254.106 0.369 3 2002 6 254.067 0.267 5 2002 7 254.282 0.487 3 2002 8 254.087 0.309 4 2002 9 253.885 0.523 2 2002 10 254.177 0.332 5 2002 11 253.598 0.366 4 2002 12 253.380 0.341 5 2003 1 252.291 0.245 5 2003 2 252.009 0.322 3 2003 3 251.927 0.319 4 2003 4 251.595 0.356 3 2003 5 251.850 0.323 3 2003 6 251.928 0.376 3 2003 7 251.834 0.367 3 2003 8 252.094 0.325 3 2003 9 251.725 0.243 4 2003 10 251.478 0.320 3 2003 11 251.388 0.216 5 2003 12 251.174 0.249 2 2004 1 251.032 0.441 3 2004 2 250.508 0.364 7 2004 3 250.237 0.349 6 2004 4 249.847 0.381 3 2004 5 249.754 0.383 6 2004 6 249.484 0.306 4 2004 7 249.554 0.320 6 2004 8 249.879 0.337 3 2004 9 249.439 0.245 5 2004 10 249.089 0.279 4 2004 11 248.845 0.293 5 2004 12 248.793 0.327 5 2005 1 248.635 0.353 4 2005 2 248.063 0.501 4 2005 3 247.865 0.537 2 2005 4 247.560 0.372 4 2005 5 247.432 0.307 5 2005 6 247.562 0.369 2 2005 7 247.256 0.332 3 2005 8 247.537 0.383 5 2005 9 247.297 0.251 3 2005 10 247.286 0.291 2 2005 11 247.134 0.472 2 2005 12 246.791 0.430 5 2006 1 246.378 0.439 3 2006 2 246.386 0.293 4 2006 3 245.928 0.406 3 2006 4 245.994 0.265 4 2006 5 245.779 0.492 2 2006 6 245.929 0.286 3 2006 7 246.084 0.323 4 2006 8 245.655 0.311 3 2006 9 245.713 0.239 5 2006 10 245.415 0.372 4 2006 11 245.187 0.279 3 2006 12 244.931 0.467 3 2007 1 244.597 0.326 4 2007 2 244.550 0.573 1 2007 3 244.174 0.619 4 2007 4 nan nan 0 2007 5 243.052 0.380 4 2007 6 243.013 0.611 3 2007 7 242.858 0.362 4 2007 8 242.943 0.300 4 2007 9 243.014 0.450 5 2007 10 242.532 0.229 4 2007 11 242.925 0.332 3 2007 12 242.957 0.392 4 2008 1 242.645 0.326 4 2008 2 242.306 0.330 5 2008 3 241.745 0.341 4 2008 4 241.078 0.563 2 2008 5 241.481 0.530 2 2008 6 241.305 0.354 4 2008 7 241.241 0.282 7 2008 8 241.282 0.272 3 2008 9 240.920 0.260 5 2008 10 240.734 0.287 5 2008 11 241.119 0.287 4 2008 12 240.831 0.496 4 2009 1 240.454 0.393 2 2009 2 240.600 0.438 2 2009 3 239.912 0.251 4 2009 4 239.289 0.289 5 2009 5 239.301 0.279 3 2009 6 239.291 0.415 3 2009 7 239.035 0.337 3 2009 8 239.306 0.302 4 2009 9 239.563 0.244 3 2009 10 239.510 0.282 1 2009 11 239.442 0.467 4 2009 12 239.088 0.347 4 2010 1 238.750 0.232 4 2010 2 238.451 0.516 2 2010 3 238.035 0.292 3 2010 4 238.356 0.442 2 2010 5 237.692 0.364 2 2010 6 237.681 0.222 3 2010 7 237.721 0.290 2 2010 8 237.655 0.193 7 2010 9 237.504 0.315 4 2010 10 237.368 0.373 2 2010 11 237.084 0.377 3 2010 12 237.057 0.407 3 2011 1 236.935 0.285 2 2011 2 236.413 0.342 3 2011 3 236.008 0.361 4 2011 4 236.009 0.519 2 2011 5 235.806 0.315 4 2011 6 235.676 0.362 3 2011 7 235.736 0.292 2 2011 8 235.462 0.279 2 2011 9 235.323 0.374 3 2011 10 235.205 0.319 2 2011 11 235.281 0.368 4 2011 12 235.300 0.372 1 2012 1 234.934 0.451 2 2012 2 234.694 0.502 2 2012 3 234.395 0.369 3 2012 4 234.063 0.305 2 2012 5 233.618 0.673 2 2012 6 233.702 0.307 4 2012 7 233.861 0.427 3 2012 8 233.485 0.324 5 2012 9 233.376 0.338 3 2012 10 nan nan 0 2012 11 233.012 0.336 2 2012 12 233.044 0.378 3 2013 1 232.482 0.507 3 2013 2 232.722 0.598 4 2013 3 232.072 0.374 2 2013 4 231.606 0.267 2 2013 5 231.890 0.378 1 2013 6 nan nan 0 2013 7 nan nan 0 2013 8 nan nan 0 2013 9 231.640 3.016 1 2013 10 231.648 0.574 2 2013 11 231.556 0.757 2 2013 12 231.637 0.455 3 2014 1 230.339 0.389 2 2014 2 230.963 1.129 2 2014 3 230.694 1.021 4 2014 4 230.680 0.564 1 2014 5 230.760 0.390 1 2014 6 230.395 0.374 3 2014 7 230.472 0.302 2 2014 8 231.010 0.430 1 2014 9 230.515 0.373 3 2014 10 230.531 0.309 2 2014 11 230.510 0.357 3 2014 12 229.990 0.300 3 2015 1 229.870 0.475 1 2015 2 229.476 0.566 2 2015 3 229.421 0.371 4 2015 4 229.667 0.417 2 2015 5 229.348 0.451 2 2015 6 229.717 0.468 3 2015 7 229.696 0.400 2 2015 8 229.195 0.577 2 2015 9 229.303 0.315 4 2015 10 228.960 0.661 1 2015 11 228.966 0.422 2 2015 12 229.097 0.349 4 2016 1 228.436 0.419 3 2016 2 228.833 0.989 2 2016 3 228.252 0.408 3 2016 4 228.104 2.060 2 2016 5 228.306 1.304 3 2016 6 228.133 0.885 2 2016 7 228.090 0.584 1 2016 8 227.600 0.973 1 2016 9 227.070 0.559 1 2016 10 227.072 0.327 4 2016 11 226.968 0.357 2 2016 12 226.647 0.925 2 2017 1 226.760 0.314 1 2017 2 226.612 0.666 2 2017 3 nan nan 0 2017 4 226.097 0.520 3 2017 5 225.921 1.188 2 2017 6 225.952 0.356 4 2017 7 226.333 0.574 4 2017 8 226.065 0.622 3 2017 9 226.105 0.475 3 2017 10 226.793 0.351 2 2017 11 226.770 0.715 3 2017 12 227.295 0.189 4 2018 1 226.804 0.705 4 2018 2 226.191 0.476 3 2018 3 225.823 0.772 4 2018 4 226.857 0.313 4 2018 5 226.527 0.699 3 2018 6 225.730 0.507 1 2018 7 nan nan 0 2018 8 227.180 0.718 1 2018 9 225.771 0.547 3 2018 10 225.850 0.735 1 2018 11 226.110 0.860 5 2018 12 225.144 0.589 3 2019 1 224.476 0.566 3 2019 2 224.611 0.550 2 2019 3 225.046 0.891 3 2019 4 224.239 0.640 3 2019 5 225.185 0.405 3 2019 6 224.757 0.613 5 2019 7 224.737 0.508 2 2019 8 nan nan 0 2019 9 nan nan 0 2019 10 nan nan 0 2019 11 nan nan 0 2019 12 nan nan 0