# file: lef_N2O_MM.dat # # Atmospheric measurements of N2O (Nitrous Oxide) # # 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. # # A known, systematic, low-side bias in the N2O measurements performed on Otto # has largely been eliminated since January of 2009. Prior to this date, # offsets are added to these flask data for the purpose of combining them with # baseline N2O data from other monitoring systems (see # http://www.esrl.noaa.gov/gmd/hats/ combined/N2O.html). The offsets -- 1.3 ppb # at Samoa and 0.6 ppb elsewhere -- were determined in reference to CATS data # (http://www.esrl.noaa.gov/gmd/hats/ insitu/cats) but have not been applied to # the Otto data reported here. # # These data represent monthly mean estimates computed using those data marked # with a 0 in flag column 7 of the companion file named "lef_N2O_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: Nitrous Oxide # data from the NOAA/ESRL halocarbons flask program. # # Calibration scale: NOAA 2006A # See http://www.esrl.noaa.gov/gmd/ccl/scales.html for more information about # calibration scales. # # Units: ppb # # Missing value: "nan" # # Data Columns: # yr Year # mon Month # m Monthly mean concentration of N2O in ppb # sd Standard deviation of the mean (or single-sample precision value) # n Number of samples # N2OottoLEFyr N2OottoLEFmon N2OottoLEFm N2OottoLEFsd N2OottoLEFn 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 8 317.040 0.771 1 1996 9 nan nan 0 1996 10 312.260 0.799 1 1996 11 nan nan 0 1996 12 312.380 0.723 1 1997 1 nan nan 0 1997 2 312.770 0.618 1 1997 3 312.990 0.817 1 1997 4 nan nan 0 1997 5 313.170 19.216 1 1997 6 nan nan 0 1997 7 313.760 0.795 1 1997 8 nan nan 0 1997 9 311.760 0.484 1 1997 10 nan nan 0 1997 11 313.530 0.695 1 1997 12 313.230 0.687 1 1998 1 313.221 1.039 2 1998 2 314.110 0.446 1 1998 3 nan nan 0 1998 4 313.620 0.659 1 1998 5 314.106 1.216 2 1998 6 313.414 1.324 3 1998 7 312.775 0.573 2 1998 8 313.358 0.686 2 1998 9 312.490 0.370 1 1998 10 313.520 0.589 1 1998 11 314.342 0.414 2 1998 12 314.150 0.479 1 1999 1 313.990 0.573 1 1999 2 315.283 0.816 3 1999 3 314.230 0.709 1 1999 4 314.040 0.490 1 1999 5 313.878 0.476 2 1999 6 314.477 0.829 4 1999 7 314.068 0.405 2 1999 8 313.580 1.273 1 1999 9 314.050 0.504 3 1999 10 314.209 0.997 2 1999 11 314.178 0.438 2 1999 12 314.952 0.467 2 2000 1 315.820 0.525 1 2000 2 315.243 0.515 3 2000 3 314.361 0.584 2 2000 4 314.719 0.696 3 2000 5 316.039 0.573 3 2000 6 315.560 1.427 1 2000 7 316.079 0.902 3 2000 8 315.652 1.348 3 2000 9 316.497 1.301 2 2000 10 315.990 0.347 1 2000 11 316.471 0.396 2 2000 12 316.040 0.469 2 2001 1 316.926 0.569 3 2001 2 316.965 0.382 2 2001 3 316.317 0.608 2 2001 4 315.196 0.491 3 2001 5 316.180 0.671 4 2001 6 315.627 1.140 3 2001 7 315.901 0.525 5 2001 8 316.188 0.289 3 2001 9 315.238 0.620 3 2001 10 316.971 1.154 4 2001 11 317.485 1.109 3 2001 12 317.838 1.994 2 2002 1 316.885 0.376 4 2002 2 317.259 0.582 3 2002 3 316.550 0.509 4 2002 4 318.014 0.597 3 2002 5 318.412 1.236 3 2002 6 317.257 1.086 4 2002 7 317.493 0.488 4 2002 8 316.651 0.637 3 2002 9 316.760 0.364 4 2002 10 316.952 0.358 5 2002 11 317.604 0.465 3 2002 12 318.131 0.412 3 2003 1 317.186 0.997 4 2003 2 317.549 0.592 2 2003 3 316.912 0.692 4 2003 4 317.277 0.609 4 2003 5 318.009 0.532 5 2003 6 317.630 1.048 4 2003 7 317.686 0.862 4 2003 8 317.093 0.347 4 2003 9 317.851 0.507 5 2003 10 317.763 0.439 3 2003 11 317.830 0.460 2 2003 12 318.806 0.481 3 2004 1 318.023 0.560 3 2004 2 319.240 0.510 2 2004 3 319.234 0.858 4 2004 4 318.399 0.358 3 2004 5 318.836 0.821 4 2004 6 317.989 0.686 4 2004 7 318.661 0.535 4 2004 8 317.479 0.678 3 2004 9 318.435 0.803 4 2004 10 318.797 0.686 4 2004 11 319.471 1.009 4 2004 12 318.777 0.468 5 2005 1 318.603 0.502 3 2005 2 319.279 0.725 5 2005 3 318.475 0.699 2 2005 4 319.030 0.785 4 2005 5 319.327 0.925 5 2005 6 320.083 0.655 3 2005 7 319.011 0.486 4 2005 8 318.760 0.593 5 2005 9 318.579 0.448 4 2005 10 319.909 1.345 4 2005 11 319.479 0.827 4 2005 12 319.017 1.343 2 2006 1 319.601 0.635 3 2006 2 319.690 0.686 4 2006 3 320.615 1.149 3 2006 4 320.215 1.013 3 2006 5 319.791 0.735 4 2006 6 319.787 0.600 4 2006 7 320.209 0.682 3 2006 8 319.611 0.427 4 2006 9 319.502 0.602 3 2006 10 319.501 0.401 4 2006 11 320.617 0.531 5 2006 12 320.248 0.417 3 2007 1 320.047 0.698 3 2007 2 320.515 0.709 4 2007 3 321.219 0.720 4 2007 4 320.890 0.874 3 2007 5 320.954 1.605 2 2007 6 320.680 0.378 4 2007 7 320.256 0.697 4 2007 8 321.114 0.402 4 2007 9 320.846 0.326 4 2007 10 321.610 0.718 4 2007 11 320.160 0.751 3 2007 12 320.756 0.357 3 2008 1 320.937 0.535 3 2008 2 320.546 0.378 4 2008 3 321.136 0.386 4 2008 4 321.117 0.512 5 2008 5 320.844 0.657 3 2008 6 321.679 0.770 4 2008 7 321.081 0.457 4 2008 8 321.207 0.928 4 2008 9 322.161 0.496 2 2008 10 321.731 0.334 5 2008 11 321.980 0.459 4 2008 12 322.380 0.926 5 2009 1 321.719 0.587 2 2009 2 322.391 1.492 4 2009 3 322.679 0.755 4 2009 4 321.976 0.443 4 2009 5 322.335 0.557 2 2009 6 323.477 0.817 3 2009 7 322.162 0.411 3 2009 8 322.627 0.591 4 2009 9 322.716 0.461 3 2009 10 322.516 0.502 4 2009 11 323.473 0.967 3 2009 12 323.262 0.495 3 2010 1 323.158 0.562 3 2010 2 323.033 0.417 4 2010 3 323.702 0.684 3 2010 4 323.049 0.613 4 2010 5 322.986 0.626 4 2010 6 324.109 1.093 4 2010 7 323.829 0.918 3 2010 8 323.240 0.461 2 2010 9 323.384 0.811 3 2010 10 324.004 0.521 4 2010 11 324.320 1.185 3 2010 12 324.275 0.598 3 2011 1 324.330 0.629 4 2011 2 324.990 0.986 3 2011 3 324.246 0.658 4 2011 4 324.532 0.569 3 2011 5 324.324 0.558 4 2011 6 324.118 0.660 2 2011 7 324.735 1.046 3 2011 8 324.826 0.562 3 2011 9 325.157 0.825 3 2011 10 325.011 0.771 3 2011 11 325.124 0.593 3 2011 12 325.180 0.790 1 2012 1 326.617 1.542 2 2012 2 326.147 0.800 4 2012 3 326.567 1.147 4 2012 4 326.131 1.004 3 2012 5 326.550 1.492 3 2012 6 325.422 0.496 4 2012 7 324.865 0.553 3 2012 8 324.629 0.665 3 2012 9 325.285 0.325 3 2012 10 325.250 0.497 3 2012 11 325.957 1.138 2 2012 12 325.492 0.820 2 2013 1 326.170 0.590 2 2013 2 325.898 0.230 3 2013 3 326.318 0.399 3 2013 4 325.656 0.428 3 2013 5 327.360 0.960 3 2013 6 330.230 1.189 1 2013 7 326.718 0.916 3 2013 8 nan nan 0 2013 9 326.614 0.601 2 2013 10 nan nan 0 2013 11 nan nan 0 2013 12 nan nan 0 2014 1 nan nan 0 2014 2 nan nan 0 2014 3 nan nan 0 2014 4 nan nan 0 2014 5 nan nan 0 2014 6 nan nan 0 2014 7 nan nan 0 2014 8 nan nan 0 2014 9 nan nan 0 2014 10 nan nan 0 2014 11 nan nan 0 2014 12 nan nan 0 2015 1 nan nan 0 2015 2 nan nan 0 2015 3 nan nan 0 2015 4 nan nan 0 2015 5 nan nan 0 2015 6 nan nan 0 2015 7 nan nan 0 2015 8 nan nan 0 2015 9 nan nan 0 2015 10 nan nan 0 2015 11 nan nan 0 2015 12 nan nan 0 2016 1 nan nan 0 2016 2 nan nan 0 2016 3 nan nan 0 2016 4 nan nan 0 2016 5 nan nan 0 2016 6 nan nan 0 2016 7 nan nan 0 2016 8 nan nan 0 2016 9 nan nan 0 2016 10 nan nan 0 2016 11 nan nan 0 2016 12 nan nan 0