# file: brw_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: BRW -- Barrow, Alaska -- 71.32 N, 156.61 W, 11 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 "brw_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 # N2OottoBRWyr N2OottoBRWmon N2OottoBRWm N2OottoBRWsd N2OottoBRWn 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 12 311.020 2.184 1 1995 1 310.813 0.979 2 1995 2 310.850 0.973 1 1995 3 310.350 2.704 1 1995 4 311.530 1.584 1 1995 5 309.921 1.511 2 1995 6 310.115 1.583 3 1995 7 310.730 1.471 1 1995 8 310.727 1.291 3 1995 9 310.716 1.022 3 1995 10 310.423 0.938 3 1995 11 310.560 0.828 1 1995 12 310.713 1.363 2 1996 1 310.993 1.007 4 1996 2 311.006 0.909 4 1996 3 311.350 2.990 1 1996 4 311.448 0.579 4 1996 5 311.868 1.498 5 1996 6 311.877 0.605 4 1996 7 311.736 0.399 4 1996 8 311.676 0.675 3 1996 9 311.697 0.555 4 1996 10 311.753 0.361 4 1996 11 312.129 0.653 4 1996 12 312.716 0.437 4 1997 1 312.372 0.719 4 1997 2 312.373 0.606 4 1997 3 312.222 0.501 4 1997 4 313.222 0.610 4 1997 5 312.853 0.531 3 1997 6 312.690 1.425 1 1997 7 312.362 0.481 3 1997 8 312.307 0.542 5 1997 9 nan nan 0 1997 10 312.122 0.352 5 1997 11 312.995 0.486 3 1997 12 312.882 0.510 4 1998 1 313.402 0.583 4 1998 2 313.360 0.886 1 1998 3 313.531 0.505 4 1998 4 313.539 0.405 4 1998 5 313.421 0.404 4 1998 6 313.363 0.464 2 1998 7 313.026 0.419 5 1998 8 312.607 0.374 4 1998 9 313.721 0.334 3 1998 10 313.314 0.419 3 1998 11 313.630 0.311 4 1998 12 314.257 0.467 4 1999 1 314.323 0.394 5 1999 2 314.000 0.303 3 1999 3 314.190 0.411 3 1999 4 314.283 0.489 4 1999 5 313.875 0.344 4 1999 6 313.971 0.360 3 1999 7 313.449 0.293 4 1999 8 313.556 0.241 4 1999 9 313.254 0.455 3 1999 10 313.912 0.294 5 1999 11 314.095 0.636 2 1999 12 314.221 0.342 3 2000 1 314.766 0.387 3 2000 2 315.388 0.380 4 2000 3 314.268 0.470 3 2000 4 315.622 0.658 3 2000 5 315.160 0.944 4 2000 6 315.461 0.992 4 2000 7 314.707 0.345 3 2000 8 314.928 0.397 3 2000 9 314.734 0.646 4 2000 10 315.541 0.727 4 2000 11 315.701 0.542 4 2000 12 316.152 0.440 5 2001 1 315.905 0.480 3 2001 2 315.729 0.871 4 2001 3 315.745 0.501 3 2001 4 314.558 0.268 3 2001 5 315.894 0.676 3 2001 6 315.179 0.952 4 2001 7 315.511 0.392 4 2001 8 314.960 0.405 4 2001 9 314.574 0.403 2 2001 10 315.510 0.427 3 2001 11 315.524 0.531 5 2001 12 317.030 0.804 1 2002 1 316.624 0.459 4 2002 2 316.673 0.478 3 2002 3 316.421 0.452 5 2002 4 316.420 0.471 2 2002 5 316.242 0.708 4 2002 6 316.509 0.418 3 2002 7 316.161 0.574 3 2002 8 315.998 0.516 3 2002 9 316.566 0.415 2 2002 10 316.579 0.514 4 2002 11 317.089 0.368 4 2002 12 316.891 0.593 2 2003 1 316.936 0.391 2 2003 2 317.020 0.402 5 2003 3 316.876 0.591 3 2003 4 317.428 0.345 3 2003 5 317.795 0.366 7 2003 6 317.465 0.352 4 2003 7 318.252 0.419 3 2003 8 317.241 0.283 5 2003 9 317.129 0.365 4 2003 10 317.297 0.518 5 2003 11 317.320 0.438 4 2003 12 318.105 0.256 3 2004 1 317.623 0.375 4 2004 2 317.414 0.587 2 2004 3 317.803 0.515 5 2004 4 318.288 0.369 5 2004 5 317.980 0.425 2 2004 6 318.039 0.416 4 2004 7 317.390 0.413 4 2004 8 317.368 0.457 4 2004 9 316.557 0.520 4 2004 10 317.583 0.617 4 2004 11 317.964 0.589 4 2004 12 317.629 0.465 3 2005 1 318.423 0.421 5 2005 2 318.677 0.549 4 2005 3 318.875 0.469 5 2005 4 318.637 0.697 4 2005 5 319.234 0.528 4 2005 6 318.733 0.699 4 2005 7 318.404 0.590 3 2005 8 318.248 0.487 3 2005 9 318.234 0.271 5 2005 10 318.547 0.396 4 2005 11 318.855 0.709 4 2005 12 319.139 0.455 5 2006 1 319.123 0.604 3 2006 2 319.456 0.642 4 2006 3 319.918 0.485 4 2006 4 319.875 0.441 4 2006 5 319.958 0.619 4 2006 6 319.909 0.848 4 2006 7 319.772 0.527 4 2006 8 319.036 0.564 5 2006 9 319.058 0.574 4 2006 10 318.848 0.393 4 2006 11 319.737 0.473 4 2006 12 319.897 0.589 4 2007 1 320.591 0.981 2 2007 2 320.227 0.597 3 2007 3 320.398 0.666 4 2007 4 320.093 0.977 4 2007 5 320.304 0.449 2 2007 6 319.991 0.717 3 2007 7 319.517 0.761 2 2007 8 320.828 0.792 2 2007 9 320.782 0.373 2 2007 10 320.822 0.508 4 2007 11 320.305 0.362 2 2007 12 320.393 0.507 3 2008 1 320.606 0.573 2 2008 2 321.032 0.384 4 2008 3 321.290 0.610 1 2008 4 321.271 0.460 2 2008 5 320.905 0.536 5 2008 6 320.920 0.408 4 2008 7 321.250 0.480 3 2008 8 320.538 0.428 2 2008 9 320.269 0.594 2 2008 10 320.955 0.300 4 2008 11 321.573 0.528 3 2008 12 322.418 0.831 5 2009 1 322.046 0.449 4 2009 2 322.142 0.683 4 2009 3 322.012 0.454 3 2009 4 322.224 0.535 2 2009 5 322.200 0.410 4 2009 6 322.120 0.483 4 2009 7 322.138 0.516 4 2009 8 322.263 0.489 3 2009 9 321.727 0.524 5 2009 10 322.548 0.344 3 2009 11 322.532 0.519 5 2009 12 322.585 0.511 4 2010 1 322.690 0.496 5 2010 2 322.838 0.411 4 2010 3 323.245 0.533 4 2010 4 322.904 0.487 5 2010 5 322.523 0.526 4 2010 6 322.725 0.422 4 2010 7 323.261 0.459 5 2010 8 322.573 0.422 4 2010 9 322.735 0.639 3 2010 10 323.908 0.546 4 2010 11 323.380 0.524 4 2010 12 323.608 0.476 5 2011 1 324.326 0.515 3 2011 2 323.953 0.498 3 2011 3 324.313 0.393 4 2011 4 325.074 0.643 4 2011 5 324.618 0.555 3 2011 6 324.386 0.491 3 2011 7 324.015 0.500 5 2011 8 324.328 0.618 3 2011 9 323.711 0.509 3 2011 10 324.384 0.378 4 2011 11 324.812 0.570 5 2011 12 325.273 0.491 2 2012 1 324.986 0.438 4 2012 2 324.980 0.557 4 2012 3 325.246 0.527 3 2012 4 325.842 0.366 3 2012 5 325.423 0.422 5 2012 6 324.913 0.417 4 2012 7 324.835 0.455 4 2012 8 324.511 0.424 5 2012 9 324.554 0.398 4 2012 10 324.970 0.382 4 2012 11 324.955 0.467 5 2012 12 325.197 0.434 5 2013 1 325.699 0.672 4 2013 2 326.261 0.375 4 2013 3 325.590 0.615 4 2013 4 326.058 0.372 4 2013 5 326.354 0.593 4 2013 6 326.172 0.527 4 2013 7 326.277 0.518 4 2013 8 325.810 0.591 4 2013 9 325.412 0.570 2 2013 10 325.040 0.425 1 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