# file: cgo_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: 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. # # 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 "cgo_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 # N2OottoCGOyr N2OottoCGOmon N2OottoCGOm N2OottoCGOsd N2OottoCGOn 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 11 308.430 1.120 1 1994 12 308.750 1.260 3 1995 1 309.200 0.844 1 1995 2 309.620 1.152 1 1995 3 309.551 0.645 4 1995 4 309.252 1.496 2 1995 5 309.523 1.576 3 1995 6 310.040 1.308 2 1995 7 310.620 1.838 1 1995 8 310.705 1.734 2 1995 9 nan nan 0 1995 10 309.554 0.929 4 1995 11 309.892 1.538 3 1995 12 nan nan 0 1996 1 310.610 1.632 1 1996 2 310.353 1.086 3 1996 3 310.253 0.744 3 1996 4 310.442 0.909 2 1996 5 310.076 0.823 5 1996 6 310.283 0.468 3 1996 7 310.458 0.681 3 1996 8 310.755 0.453 4 1996 9 310.953 0.574 4 1996 10 310.790 0.591 3 1996 11 311.263 0.629 2 1996 12 311.090 0.606 1 1997 1 311.087 0.692 2 1997 2 310.900 0.407 1 1997 3 310.779 0.374 5 1997 4 311.050 0.567 1 1997 5 310.998 1.146 2 1997 6 311.370 0.370 1 1997 7 311.474 0.434 5 1997 8 312.049 0.743 2 1997 9 312.350 0.881 3 1997 10 312.110 0.310 1 1997 11 311.943 0.500 4 1997 12 311.913 0.583 3 1998 1 312.381 0.533 2 1998 2 312.004 0.699 3 1998 3 311.743 0.394 5 1998 4 311.274 0.445 4 1998 5 311.484 0.372 3 1998 6 311.619 0.372 4 1998 7 312.428 0.555 3 1998 8 312.260 0.445 2 1998 9 312.589 0.519 4 1998 10 312.807 0.406 4 1998 11 313.234 0.424 5 1998 12 313.253 0.657 3 1999 1 313.541 0.542 2 1999 2 312.874 0.464 3 1999 3 313.217 0.425 5 1999 4 312.777 0.388 4 1999 5 312.970 0.714 4 1999 6 313.378 0.598 4 1999 7 313.151 0.589 3 1999 8 313.555 0.457 3 1999 9 313.952 0.357 4 1999 10 314.077 0.413 6 1999 11 313.977 0.321 2 1999 12 314.108 0.948 2 2000 1 313.520 0.663 1 2000 2 313.576 0.693 3 2000 3 312.989 0.425 3 2000 4 313.656 0.574 3 2000 5 314.104 0.554 4 2000 6 314.021 0.589 4 2000 7 314.913 0.863 4 2000 8 315.040 0.647 1 2000 9 314.341 0.472 3 2000 10 314.798 0.686 2 2000 11 314.745 0.433 4 2000 12 314.395 0.494 3 2001 1 314.440 0.263 4 2001 2 314.654 0.372 2 2001 3 314.190 0.482 1 2001 4 314.286 1.145 2 2001 5 314.010 0.728 2 2001 6 313.950 0.974 4 2001 7 315.153 0.773 2 2001 8 314.643 0.976 2 2001 9 314.750 0.328 4 2001 10 315.343 0.481 4 2001 11 315.714 0.513 3 2001 12 315.805 0.313 2 2002 1 315.845 0.287 5 2002 2 315.417 0.497 4 2002 3 314.318 0.585 4 2002 4 314.464 0.414 2 2002 5 314.749 0.483 3 2002 6 315.140 0.504 5 2002 7 315.237 0.735 3 2002 8 316.097 0.378 4 2002 9 316.248 0.414 4 2002 10 315.772 0.265 6 2002 11 315.817 0.473 4 2002 12 315.395 0.543 5 2003 1 315.023 0.668 3 2003 2 315.437 0.521 3 2003 3 315.312 0.285 3 2003 4 315.464 0.523 3 2003 5 316.082 0.334 4 2003 6 315.944 0.457 3 2003 7 316.469 0.315 3 2003 8 316.487 0.426 4 2003 9 316.819 0.551 3 2003 10 316.833 0.310 3 2003 11 317.042 0.415 5 2003 12 316.901 0.434 4 2004 1 316.053 0.341 3 2004 2 316.768 0.474 7 2004 3 317.104 0.373 6 2004 4 316.703 0.377 3 2004 5 316.450 0.365 6 2004 6 316.440 0.422 6 2004 7 316.909 0.505 6 2004 8 316.876 0.485 3 2004 9 317.140 0.425 6 2004 10 317.450 0.509 4 2004 11 317.609 0.542 5 2004 12 317.684 0.581 5 2005 1 317.665 0.397 5 2005 2 317.298 0.488 5 2005 3 317.441 0.755 3 2005 4 317.651 0.650 5 2005 5 317.663 0.421 6 2005 6 317.804 0.849 2 2005 7 317.470 0.728 3 2005 8 317.755 0.393 5 2005 9 317.816 0.343 3 2005 10 317.759 0.603 3 2005 11 318.383 0.521 2 2005 12 318.437 0.449 5 2006 1 317.844 0.618 3 2006 2 318.365 0.574 4 2006 3 318.341 0.721 4 2006 4 318.401 0.761 4 2006 5 318.087 0.670 2 2006 6 318.774 0.552 3 2006 7 318.782 0.595 4 2006 8 319.077 0.765 3 2006 9 319.039 0.373 5 2006 10 319.020 0.233 4 2006 11 319.350 0.515 4 2006 12 318.955 0.512 3 2007 1 319.154 0.476 4 2007 2 318.951 0.592 2 2007 3 318.821 0.783 4 2007 4 nan nan 0 2007 5 318.367 0.586 3 2007 6 318.189 0.444 2 2007 7 318.529 0.387 4 2007 8 319.457 0.391 4 2007 9 320.062 1.093 4 2007 10 319.613 0.571 4 2007 11 319.355 0.425 3 2007 12 319.608 0.510 4 2008 1 319.345 0.401 4 2008 2 319.572 0.286 5 2008 3 319.745 0.639 4 2008 4 319.710 0.723 2 2008 5 320.021 0.709 2 2008 6 319.955 0.275 4 2008 7 319.969 0.497 7 2008 8 320.108 0.660 3 2008 9 320.404 0.359 5 2008 10 320.530 0.324 5 2008 11 320.788 0.317 4 2008 12 321.036 0.380 5 2009 1 320.580 0.454 2 2009 2 320.821 0.630 2 2009 3 320.692 0.305 4 2009 4 320.550 0.285 5 2009 5 320.488 0.620 3 2009 6 320.534 0.391 3 2009 7 320.695 0.487 3 2009 8 321.463 0.403 6 2009 9 321.441 0.683 3 2009 10 321.520 0.473 1 2009 11 321.406 0.465 4 2009 12 321.561 0.419 4 2010 1 321.666 0.416 4 2010 2 321.671 0.686 2 2010 3 322.270 0.421 3 2010 4 321.705 0.498 2 2010 5 321.302 0.522 3 2010 6 321.466 0.433 4 2010 7 321.834 0.554 3 2010 8 321.835 0.553 7 2010 9 322.710 0.492 4 2010 10 323.058 0.592 2 2010 11 322.624 0.665 3 2010 12 322.856 0.389 3 2011 1 322.650 0.366 3 2011 2 322.543 0.542 3 2011 3 322.916 0.465 4 2011 4 322.597 0.594 2 2011 5 322.604 0.470 4 2011 6 323.151 0.746 4 2011 7 323.156 0.599 3 2011 8 322.967 0.490 2 2011 9 323.335 0.465 3 2011 10 323.563 0.501 3 2011 11 323.738 0.393 4 2011 12 324.110 0.690 1 2012 1 324.216 0.431 3 2012 2 324.078 0.564 2 2012 3 323.669 0.695 3 2012 4 324.375 0.408 2 2012 5 324.115 0.622 2 2012 6 324.147 0.409 4 2012 7 324.109 0.383 2 2012 8 324.513 0.775 4 2012 9 324.472 0.379 4 2012 10 nan nan 0 2012 11 324.737 0.520 2 2012 12 324.972 0.384 3 2013 1 324.717 0.413 3 2013 2 324.465 0.590 3 2013 3 324.857 0.420 3 2013 4 324.398 0.355 2 2013 5 324.910 0.921 1 2013 6 nan nan 0 2013 7 nan nan 0 2013 8 325.869 0.591 2 2013 9 nan nan 0 2013 10 325.464 0.707 3 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