# file: lef_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: LEF -- Park Falls, Wisconsin -- 45.95 N, 90.27 W, 472 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 "lef_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 # F11ottoLEFyr F11ottoLEFmon F11ottoLEFm F11ottoLEFsd F11ottoLEFn 1996 1 nan nan 0 1996 2 nan nan 0 1996 3 nan nan 0 1996 4 nan nan 0 1996 5 nan nan 0 1996 6 nan nan 0 1996 7 nan nan 0 1996 8 nan nan 0 1996 9 nan nan 0 1996 10 nan nan 0 1996 11 nan nan 0 1996 12 267.020 0.416 1 1997 1 nan nan 0 1997 2 266.320 0.473 1 1997 3 267.180 0.300 1 1997 4 nan nan 0 1997 5 266.000 0.487 1 1997 6 266.280 0.459 1 1997 7 265.410 0.521 1 1997 8 nan nan 0 1997 9 264.590 0.261 1 1997 10 nan nan 0 1997 11 265.390 0.487 1 1997 12 265.570 0.557 1 1998 1 265.363 0.542 2 1998 2 264.640 0.319 1 1998 3 nan nan 0 1998 4 264.720 0.434 1 1998 5 264.770 1.054 2 1998 6 263.328 0.910 3 1998 7 262.678 0.587 2 1998 8 263.131 0.721 2 1998 9 262.350 0.570 1 1998 10 263.030 0.406 1 1998 11 264.173 0.839 2 1998 12 264.230 0.760 1 1999 1 263.660 0.580 1 1999 2 264.284 0.572 3 1999 3 263.450 0.608 1 1999 4 262.860 0.394 1 1999 5 262.696 0.417 2 1999 6 261.711 0.367 4 1999 7 261.313 0.573 2 1999 8 nan nan 0 1999 9 261.943 1.146 3 1999 10 262.481 0.983 2 1999 11 261.852 0.417 2 1999 12 263.063 2.100 2 2000 1 263.480 0.448 1 2000 2 262.818 0.701 3 2000 3 262.565 3.408 2 2000 4 261.755 0.746 3 2000 5 261.404 0.540 3 2000 6 261.120 0.536 1 2000 7 261.136 0.846 3 2000 8 259.697 0.405 3 2000 9 261.002 1.035 3 2000 10 261.060 0.338 1 2000 11 261.643 1.754 3 2000 12 261.174 0.517 2 2001 1 261.077 0.385 3 2001 2 260.332 0.412 3 2001 3 259.943 0.364 2 2001 4 262.163 4.200 3 2001 5 259.052 0.506 4 2001 6 259.325 0.364 3 2001 7 258.428 0.389 5 2001 8 259.769 1.517 4 2001 9 257.875 0.547 3 2001 10 259.391 0.903 4 2001 11 258.737 0.332 2 2001 12 260.446 1.676 2 2002 1 258.909 0.728 4 2002 2 258.484 0.363 3 2002 3 258.667 0.819 4 2002 4 258.323 0.365 3 2002 5 257.955 0.485 4 2002 6 256.812 0.482 4 2002 7 258.508 1.416 4 2002 8 256.302 0.876 3 2002 9 256.641 1.072 4 2002 10 255.837 0.343 4 2002 11 256.369 0.342 2 2002 12 258.341 1.359 3 2003 1 256.923 0.728 4 2003 2 256.224 0.494 2 2003 3 257.294 1.579 4 2003 4 255.766 0.356 4 2003 5 255.439 0.668 5 2003 6 256.976 1.241 4 2003 7 254.191 1.338 4 2003 8 253.853 0.639 4 2003 9 253.655 1.216 4 2003 10 254.627 1.504 3 2003 11 253.815 0.391 2 2003 12 258.914 4.287 3 2004 1 254.163 0.298 3 2004 2 254.454 0.566 2 2004 3 253.966 0.409 4 2004 4 253.327 0.396 3 2004 5 253.200 0.234 4 2004 6 252.772 0.878 4 2004 7 252.465 0.554 4 2004 8 252.657 1.317 3 2004 9 252.341 0.764 4 2004 10 252.928 1.714 4 2004 11 252.346 1.261 4 2004 12 252.078 0.555 5 2005 1 251.549 0.391 3 2005 2 251.416 0.527 5 2005 3 251.679 1.711 2 2005 4 251.112 0.327 4 2005 5 251.126 0.582 5 2005 6 250.408 0.535 3 2005 7 250.085 0.707 4 2005 8 250.001 0.665 5 2005 9 249.346 0.494 4 2005 10 250.997 1.353 4 2005 11 249.871 0.342 4 2005 12 249.672 0.795 2 2006 1 250.398 1.045 3 2006 2 249.298 0.344 4 2006 3 249.985 1.062 3 2006 4 249.381 0.886 3 2006 5 248.957 0.368 4 2006 6 247.842 0.339 4 2006 7 248.313 0.311 4 2006 8 247.107 0.385 5 2006 9 246.783 0.574 3 2006 10 247.104 0.384 4 2006 11 248.777 1.881 5 2006 12 247.364 0.260 3 2007 1 247.474 0.320 3 2007 2 247.397 0.605 4 2007 3 247.334 1.078 4 2007 4 246.711 0.426 3 2007 5 246.592 0.884 2 2007 6 246.390 1.696 4 2007 7 246.385 1.159 4 2007 8 244.897 0.666 4 2007 9 245.408 1.388 4 2007 10 245.345 0.912 4 2007 11 245.284 0.438 3 2007 12 246.042 0.465 3 2008 1 246.101 0.871 3 2008 2 245.002 0.361 4 2008 3 244.580 0.374 4 2008 4 244.421 0.585 5 2008 5 244.715 1.471 3 2008 6 244.090 0.446 4 2008 7 243.009 0.516 4 2008 8 245.923 2.745 4 2008 9 242.709 0.256 2 2008 10 243.526 0.946 5 2008 11 244.712 0.927 4 2008 12 243.686 0.475 5 2009 1 243.015 0.401 2 2009 2 243.200 0.375 4 2009 3 243.086 0.355 4 2009 4 242.113 0.251 4 2009 5 242.270 0.453 2 2009 6 242.328 0.685 3 2009 7 241.258 0.372 3 2009 8 241.224 0.285 4 2009 9 241.928 0.839 4 2009 10 241.824 0.884 4 2009 11 242.738 2.550 3 2009 12 242.184 0.875 3 2010 1 241.734 0.499 3 2010 2 241.344 0.314 4 2010 3 241.278 0.434 3 2010 4 241.538 1.140 4 2010 5 240.240 0.369 4 2010 6 240.095 0.718 4 2010 7 239.041 0.364 3 2010 8 239.414 0.537 2 2010 9 239.500 0.596 3 2010 10 239.324 0.350 4 2010 11 240.256 0.936 3 2010 12 239.967 0.324 3 2011 1 239.552 0.411 4 2011 2 239.459 0.345 3 2011 3 238.969 0.508 4 2011 4 238.768 0.408 3 2011 5 238.232 0.327 4 2011 6 237.932 0.392 2 2011 7 237.623 0.864 3 2011 8 237.888 1.360 3 2011 9 237.589 1.326 3 2011 10 238.106 0.636 3 2011 11 238.086 0.225 3 2011 12 237.530 0.653 1 2012 1 239.988 3.415 2 2012 2 237.825 0.651 4 2012 3 237.416 0.811 4 2012 4 236.682 0.392 3 2012 5 237.748 1.510 3 2012 6 235.595 0.714 4 2012 7 235.317 0.425 3 2012 8 234.792 0.357 3 2012 9 235.028 0.416 3 2012 10 235.449 1.012 3 2012 11 236.192 0.580 2 2012 12 236.265 0.540 2 2013 1 235.636 0.559 2 2013 2 235.829 0.415 3 2013 3 235.024 0.598 3 2013 4 234.727 0.325 3 2013 5 235.070 0.492 3 2013 6 235.620 1.223 1 2013 7 234.867 0.650 2 2013 8 nan nan 0 2013 9 nan nan 0 2013 10 nan nan 0 2013 11 nan nan 0 2013 12 234.979 0.480 2 2014 1 234.597 0.436 3 2014 2 234.182 0.629 2 2014 3 234.530 0.994 4 2014 4 234.414 0.695 4 2014 5 234.567 0.438 2 2014 6 233.920 0.429 3 2014 7 233.306 0.530 2 2014 8 233.908 0.879 4 2014 9 234.318 0.462 4 2014 10 233.968 0.366 4 2014 11 234.078 0.406 3 2014 12 234.093 0.417 2 2015 1 233.350 0.465 1 2015 2 233.357 0.771 2 2015 3 233.740 0.831 3 2015 4 232.609 0.282 3 2015 5 232.890 1.149 1 2015 6 232.851 0.803 5 2015 7 233.022 0.419 2 2015 8 232.547 0.648 4 2015 9 232.499 0.518 5 2015 10 233.039 1.160 2 2015 11 232.998 0.516 2 2015 12 233.607 0.635 3 2016 1 232.193 0.473 3 2016 2 232.972 0.991 3 2016 3 231.618 1.171 2 2016 4 231.905 1.425 2 2016 5 232.488 1.815 3 2016 6 231.816 0.950 2 2016 7 232.321 0.893 3 2016 8 230.963 0.592 3 2016 9 231.303 0.687 3 2016 10 230.739 0.976 2 2016 11 231.228 0.773 5 2016 12 231.963 0.700 2 2017 1 231.117 0.645 2 2017 2 231.020 0.668 4 2017 3 230.461 0.562 2 2017 4 230.631 0.468 3 2017 5 230.511 1.193 5 2017 6 230.256 0.700 2 2017 7 229.935 0.817 3 2017 8 230.130 0.330 3 2017 9 230.861 1.867 2 2017 10 230.212 0.743 3 2017 11 231.003 1.062 3 2017 12 230.603 0.917 3 2018 1 230.018 0.723 3 2018 2 229.619 1.110 3 2018 3 229.690 0.508 1 2018 4 229.773 0.500 4 2018 5 230.565 0.441 2 2018 6 229.120 0.688 2 2018 7 nan nan 0 2018 8 nan nan 0 2018 9 228.529 0.269 3 2018 10 229.218 0.544 2 2018 11 229.274 0.625 2 2018 12 229.051 0.850 2 2019 1 nan nan 0 2019 2 228.130 0.489 4 2019 3 228.206 0.446 2 2019 4 227.747 0.404 3 2019 5 227.886 0.738 2 2019 6 228.082 0.517 2 2019 7 227.506 0.792 4 2019 8 226.550 0.517 1 2019 9 nan nan 0 2019 10 nan nan 0 2019 11 nan nan 0 2019 12 nan nan 0