# file: mlo_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: MLO -- Mauna Loa, Hawaii -- 19.54 N, 155.58 W, 3397 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 "mlo_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 # F11ottoMLOyr F11ottoMLOmon F11ottoMLOm F11ottoMLOsd F11ottoMLOn 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 nan nan 0 1994 12 267.710 0.500 1 1995 1 266.784 0.297 2 1995 2 266.840 1.029 1 1995 3 266.754 0.332 2 1995 4 266.636 0.206 2 1995 5 266.653 0.298 3 1995 6 266.430 0.334 1 1995 7 265.729 0.347 2 1995 8 266.770 0.408 1 1995 9 266.334 0.327 3 1995 10 266.691 0.552 3 1995 11 266.485 0.678 4 1995 12 266.830 0.774 1 1996 1 266.697 0.538 4 1996 2 266.544 0.353 3 1996 3 266.836 0.534 4 1996 4 266.753 0.403 4 1996 5 266.595 0.421 4 1996 6 266.222 0.347 5 1996 7 266.216 0.669 2 1996 8 265.889 0.654 4 1996 9 266.265 0.446 4 1996 10 265.993 0.473 4 1996 11 266.195 0.478 4 1996 12 266.374 0.638 4 1997 1 265.670 0.526 1 1997 2 266.614 0.387 2 1997 3 265.324 0.494 5 1997 4 265.063 0.550 2 1997 5 265.166 0.663 4 1997 6 264.845 0.314 5 1997 7 264.505 0.330 4 1997 8 264.897 0.252 4 1997 9 264.447 0.686 2 1997 10 265.157 0.453 4 1997 11 264.995 0.612 2 1997 12 265.050 0.607 5 1998 1 264.207 0.240 4 1998 2 264.587 0.470 4 1998 3 263.989 0.480 3 1998 4 263.863 0.411 3 1998 5 263.349 0.667 5 1998 6 263.055 0.211 3 1998 7 262.863 0.232 5 1998 8 262.976 0.354 4 1998 9 262.418 0.391 2 1998 10 262.961 0.270 3 1998 11 263.643 0.473 4 1998 12 263.267 0.432 4 1999 1 263.255 0.534 4 1999 2 263.050 0.533 5 1999 3 263.273 0.444 4 1999 4 262.856 0.344 3 1999 5 262.264 0.568 4 1999 6 262.299 0.797 5 1999 7 261.436 0.344 4 1999 8 261.515 0.337 5 1999 9 261.854 0.259 3 1999 10 261.861 0.417 3 1999 11 261.579 0.377 4 1999 12 261.973 0.390 5 2000 1 261.763 0.317 4 2000 2 261.331 0.314 5 2000 3 261.053 0.343 3 2000 4 260.661 1.063 3 2000 5 260.052 0.513 5 2000 6 260.302 0.520 4 2000 7 260.103 0.649 4 2000 8 259.797 0.632 4 2000 9 260.016 0.552 4 2000 10 259.996 0.318 4 2000 11 260.450 0.357 4 2000 12 259.729 0.417 3 2001 1 260.001 0.207 3 2001 2 259.843 0.275 4 2001 3 259.436 0.390 4 2001 4 259.111 0.339 3 2001 5 258.532 0.366 3 2001 6 258.535 0.499 4 2001 7 258.246 0.420 3 2001 8 257.856 0.336 3 2001 9 257.688 0.265 4 2001 10 257.950 0.398 3 2001 11 258.295 0.346 4 2001 12 258.278 0.307 3 2002 1 257.809 0.347 2 2002 2 257.533 0.621 3 2002 3 257.440 0.363 5 2002 4 256.948 0.445 4 2002 5 256.872 0.378 4 2002 6 256.501 0.383 5 2002 7 255.998 0.273 4 2002 8 255.872 0.339 4 2002 9 255.942 0.381 5 2002 10 255.864 0.750 4 2002 11 256.309 0.288 4 2002 12 256.281 0.410 5 2003 1 255.404 0.341 4 2003 2 255.086 0.432 4 2003 3 255.050 0.409 5 2003 4 254.532 0.377 4 2003 5 254.220 0.197 4 2003 6 254.138 0.332 6 2003 7 253.955 0.316 4 2003 8 253.545 0.390 2 2003 9 253.855 0.351 4 2003 10 253.532 0.245 4 2003 11 253.640 0.298 4 2003 12 253.415 0.364 4 2004 1 253.220 0.406 3 2004 2 252.706 0.301 5 2004 3 252.737 0.384 4 2004 4 252.793 0.384 4 2004 5 252.264 0.413 4 2004 6 251.836 0.379 5 2004 7 251.727 0.359 3 2004 8 251.756 0.389 4 2004 9 251.514 0.336 5 2004 10 251.282 0.386 4 2004 11 251.223 0.371 4 2004 12 251.218 0.272 5 2005 1 250.973 0.345 4 2005 2 250.986 0.336 4 2005 3 250.492 0.315 5 2005 4 250.367 0.367 4 2005 5 250.024 0.327 5 2005 6 249.824 0.396 4 2005 7 249.792 0.365 4 2005 8 249.513 0.264 5 2005 9 249.598 0.418 4 2005 10 249.440 0.313 4 2005 11 249.597 0.343 5 2005 12 249.283 0.529 4 2006 1 249.039 0.286 4 2006 2 248.523 0.299 5 2006 3 248.321 0.391 4 2006 4 248.460 0.487 4 2006 5 248.164 0.517 5 2006 6 247.851 0.455 4 2006 7 247.733 0.313 3 2006 8 247.432 0.317 5 2006 9 247.179 0.289 4 2006 10 247.212 0.466 4 2006 11 246.866 0.497 5 2006 12 246.999 0.460 4 2007 1 246.706 0.482 4 2007 2 246.716 0.333 5 2007 3 246.498 0.461 4 2007 4 246.115 0.370 4 2007 5 245.819 0.437 4 2007 6 245.915 0.398 4 2007 7 245.341 0.513 4 2007 8 244.821 0.339 5 2007 9 245.007 0.280 4 2007 10 244.892 0.528 4 2007 11 244.868 0.339 5 2007 12 245.241 0.403 4 2008 1 245.157 0.228 4 2008 2 244.384 0.370 5 2008 3 244.286 0.435 4 2008 4 243.861 0.452 4 2008 5 243.674 0.418 4 2008 6 243.620 0.831 4 2008 7 243.139 0.477 5 2008 8 243.177 0.270 4 2008 9 242.949 0.258 4 2008 10 242.955 0.318 5 2008 11 242.828 0.344 4 2008 12 242.985 0.353 4 2009 1 242.806 0.354 5 2009 2 242.567 0.333 4 2009 3 242.268 0.276 3 2009 4 242.051 0.259 5 2009 5 241.894 0.324 4 2009 6 241.534 0.471 4 2009 7 241.323 0.328 5 2009 8 241.145 0.291 2 2009 9 241.311 0.285 5 2009 10 241.394 0.257 4 2009 11 241.548 0.252 4 2009 12 241.210 0.406 4 2010 1 241.102 0.230 4 2010 2 241.642 0.344 4 2010 3 240.340 0.382 5 2010 4 240.484 0.318 3 2010 5 240.080 0.197 5 2010 6 239.471 0.318 4 2010 7 239.246 0.342 4 2010 8 239.364 0.385 5 2010 9 239.378 0.257 4 2010 10 239.494 0.386 3 2010 11 239.515 0.220 4 2010 12 239.127 0.444 3 2011 1 239.112 0.326 4 2011 2 238.964 0.344 4 2011 3 238.630 0.462 4 2011 4 238.194 0.413 3 2011 5 237.795 0.378 3 2011 6 237.843 0.327 4 2011 7 237.788 0.297 4 2011 8 237.655 0.295 5 2011 9 237.442 0.317 4 2011 10 237.265 0.360 4 2011 11 237.484 0.302 5 2011 12 237.299 0.298 4 2012 1 237.049 0.393 4 2012 2 236.917 0.456 4 2012 3 236.695 0.411 4 2012 4 236.476 0.282 4 2012 5 235.966 0.463 3 2012 6 235.658 0.297 4 2012 7 235.406 0.377 5 2012 8 235.251 0.309 4 2012 9 235.173 0.269 3 2012 10 235.649 0.323 5 2012 11 235.475 0.247 4 2012 12 235.736 0.409 4 2013 1 235.337 0.322 4 2013 2 235.412 0.410 4 2013 3 235.023 0.299 4 2013 4 234.371 0.309 5 2013 5 234.354 0.460 4 2013 6 233.936 0.378 3 2013 7 233.997 0.470 4 2013 8 234.725 0.503 3 2013 9 nan nan 0 2013 10 234.333 3.270 2 2013 11 234.384 0.595 4 2013 12 234.053 0.348 5 2014 1 233.576 0.467 4 2014 2 233.081 0.365 4 2014 3 233.687 0.396 4 2014 4 233.908 0.808 5 2014 5 233.914 0.354 3 2014 6 233.374 0.481 4 2014 7 232.989 0.396 4 2014 8 233.686 0.532 4 2014 9 233.879 0.529 5 2014 10 233.446 0.571 4 2014 11 233.886 0.404 3 2014 12 233.485 0.490 5 2015 1 233.452 0.700 4 2015 2 232.837 0.508 4 2015 3 232.492 0.545 4 2015 4 232.209 0.597 4 2015 5 232.347 0.424 3 2015 6 232.220 0.445 5 2015 7 232.463 0.416 3 2015 8 231.647 0.257 3 2015 9 232.340 0.299 5 2015 10 232.355 0.380 4 2015 11 232.128 0.330 3 2015 12 232.000 0.422 5 2016 1 231.275 0.892 4 2016 2 230.905 0.514 3 2016 3 231.691 0.972 3 2016 4 231.171 1.270 4 2016 5 232.160 0.736 5 2016 6 232.572 1.134 2 2016 7 231.869 1.486 3 2016 8 231.175 0.457 5 2016 9 231.093 0.488 2 2016 10 230.546 0.358 3 2016 11 231.405 0.327 5 2016 12 230.973 0.400 2 2017 1 231.131 0.593 4 2017 2 230.520 0.774 5 2017 3 229.710 0.527 4 2017 4 230.411 0.639 4 2017 5 230.312 0.570 5 2017 6 230.084 0.702 4 2017 7 229.391 0.819 5 2017 8 229.671 0.505 4 2017 9 229.865 0.842 2 2017 10 230.371 0.500 4 2017 11 230.322 0.648 3 2017 12 229.274 0.434 3 2018 1 229.764 0.817 5 2018 2 229.262 0.740 4 2018 3 229.171 0.649 4 2018 4 228.922 1.167 4 2018 5 228.748 0.827 2 2018 6 228.161 0.390 2 2018 7 nan nan 0 2018 8 228.744 0.467 2 2018 9 228.364 0.570 6 2018 10 228.687 0.575 8 2018 11 228.956 0.762 8 2018 12 228.814 0.893 4 2019 1 228.242 0.631 5 2019 2 227.398 0.448 4 2019 3 228.587 0.366 4 2019 4 227.514 0.590 5 2019 5 226.848 0.632 4 2019 6 227.327 0.567 4 2019 7 226.849 0.875 4 2019 8 227.258 0.593 4 2019 9 nan nan 0 2019 10 nan nan 0 2019 11 nan nan 0 2019 12 nan nan 0