# file: nwr_N2O_MM.dat # date: Wed, Apr 27, 2022 1:48:29 PM # # Nitrous Oxide (N2O) data from hourly in situ samples analyzed on a gas chromatograph located # at Niwot Ridge (NWR), Colorado (C-1 site: 40.04 N, 105.54 W, elevation: 3018 m) # # Atmospheric Measurements from the NOAA/ESRL Chromatograph for Atmospheric Trace Species # (CATS) Program. This GC replaces the RITS GCs operated during the period of 1986 through 2000. # This work was funded in part by the Atmospheric Chemistry Project of NOAA's Climate and # Global Change Program. # # (PIs) Geoffrey S. Dutton, Dr. James W. Elkins, Dr. Bradley D. Hall # # National Oceanic and Atmospheric Administration (NOAA) # Earth System Research Laboratory (ESRL) # 325 Broadway, R/GML # Boulder, CO 80305-3328 # # Email: Geoff.Dutton@noaa.gov; James.W.Elkins@noaa.gov; Bradley.Hall@noaa.gov # Phone: (303) 497-6086 (303) 497-6224 (303) 497-7011 # Fax: (303) 497-6290 # # See (http://www.esrl.noaa.gov/gmd/obop/) for station statistics and personnel. # # 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. We are trying to encourage scientific discussion. # The PIs can discuss the quality of the data and any potential problems with its analysis. Recent data (less # than 1.5 years) are considered preliminary. Please contact the PIs for more information. # # The data should be cited in presentations or publications as the flowing: Nitrous Oxide data from # the NOAA/ESRL halocarbons in situ program. # # DOI: http://doi.org/10.7289/V5X0659V # # Calibration scale used: NOAA 2006A # # More information about the calibration scale can be found at: # http://www.esrl.noaa.gov/gmd/ccl/ # # The CATS GCs sample air once an hour. Monthly median data are provided in parts-per-billion, ppb. # Abbreviations used: # yr=year, mon=month, m=monthly data; gc=type of sample--in situ GC data, sd=standard deviation of samples, # n=number of samples, brw=Pt. Barrow, Alaska, sum=Summit, Greenland, nwr= Niwot Ridge, Colorado # mlo=Mauna Loa, Hawaii, smo = American Samoa, spo=South Pole, Antarctica # NAN=not a number or no data, and space(s) is the delimiter. # # The standard deviation (unc) reported is the estimate of insturmental precision. # The standard deviation (sd) reported is the estimate of atmospheric variability. # # year, month, monthly median of N2O in ppb, uncertainty (unc), std. dev. (sd), number of samples # N2OcatsNWRyr N2OcatsNWRmon N2OcatsNWRm N2OcatsNWRunc N2OcatsNWRsd N2OcatsNWRn 1998 1 nan nan nan 0 1998 2 nan nan nan 0 1998 3 nan nan nan 0 1998 4 nan nan nan 0 1998 5 nan nan nan 0 1998 6 nan nan nan 0 1998 7 nan nan nan 0 1998 8 nan nan nan 0 1998 9 nan nan nan 0 1998 10 nan nan nan 0 1998 11 nan nan nan 0 1998 12 nan nan nan 0 1999 1 nan nan nan 0 1999 2 nan nan nan 0 1999 3 nan nan nan 0 1999 4 nan nan nan 0 1999 5 nan nan nan 0 1999 6 nan nan nan 0 1999 7 nan nan nan 0 1999 8 nan nan nan 0 1999 9 nan nan nan 0 1999 10 nan nan nan 0 1999 11 nan nan nan 0 1999 12 nan nan nan 0 2000 1 nan nan nan 0 2000 2 nan nan nan 0 2000 3 nan nan nan 0 2000 4 nan nan nan 0 2000 5 nan nan nan 0 2000 6 nan nan nan 0 2000 7 nan nan nan 0 2000 8 nan nan nan 0 2000 9 nan nan nan 0 2000 10 nan nan nan 0 2000 11 nan nan nan 0 2000 12 nan nan nan 0 2001 1 317.22 0.74 0.98 354 2001 2 316.96 0.93 1.05 424 2001 3 317.16 0.71 1.01 576 2001 4 316.96 0.78 1.04 688 2001 5 316.98 0.93 1.07 678 2001 6 317.29 1.03 1.27 188 2001 7 317.35 0.67 1.11 680 2001 8 317.04 2.83 2.02 485 2001 9 317.29 2.92 2.23 617 2001 10 317.22 1.83 2.12 736 2001 11 317.67 2.12 2.24 694 2001 12 317.84 2.17 1.96 556 2002 1 317.75 1.48 1.50 481 2002 2 317.81 1.32 1.23 634 2002 3 317.91 0.96 1.04 698 2002 4 317.61 1.05 1.26 697 2002 5 317.81 1.50 1.61 697 2002 6 318.55 0.68 1.05 693 2002 7 318.64 0.47 0.77 699 2002 8 318.12 0.36 0.64 618 2002 9 318.92 0.40 0.60 160 2002 10 318.80 3.52 1.47 528 2002 11 318.34 4.09 1.42 571 2002 12 318.61 1.16 1.12 627 2003 1 318.67 0.80 0.81 564 2003 2 318.81 0.60 0.82 481 2003 3 318.81 0.57 0.85 464 2003 4 318.75 0.56 0.86 688 2003 5 318.86 0.59 0.86 656 2003 6 319.03 1.11 1.77 503 2003 7 319.02 1.18 1.77 579 2003 8 318.50 1.02 1.52 716 2003 9 318.49 1.06 1.58 586 2003 10 318.70 0.86 1.29 580 2003 11 318.81 0.87 1.17 621 2003 12 318.79 1.11 1.21 603 2004 1 318.89 1.37 1.38 620 2004 2 318.94 0.96 1.27 530 2004 3 318.79 0.68 0.80 432 2004 4 319.08 0.59 0.92 350 2004 5 318.70 0.67 0.84 83 2004 6 318.67 2.77 1.86 113 2004 7 318.81 2.04 1.80 392 2004 8 318.89 3.04 1.62 287 2004 9 319.00 3.09 1.68 335 2004 10 319.21 1.08 1.56 601 2004 11 319.81 1.30 1.51 644 2004 12 319.46 1.67 1.43 582 2005 1 nan nan nan 0 2005 2 nan nan nan 0 2005 3 nan nan nan 0 2005 4 nan nan nan 0 2005 5 nan nan nan 0 2005 6 nan nan nan 0 2005 7 319.16 2.55 3.17 446 2005 8 319.58 2.10 2.53 203 2005 9 318.78 2.28 2.38 280 2005 10 nan nan nan 0 2005 11 nan nan nan 0 2005 12 nan nan nan 0 2006 1 320.07 1.92 2.48 55 2006 2 320.01 1.82 2.32 321 2006 3 319.86 2.02 2.24 363 2006 4 319.70 2.02 2.30 159 2006 5 nan nan nan 0 2006 6 nan nan nan 0 2006 7 nan nan nan 0 2006 8 nan nan nan 0 2006 9 nan nan nan 0 2006 10 nan nan nan 0 2006 11 nan nan nan 0 2006 12 nan nan nan 0 2007 1 nan nan nan 0 2007 2 nan nan nan 0 2007 3 nan nan nan 0 2007 4 nan nan nan 0 2007 5 nan nan nan 0 2007 6 nan nan nan 0 2007 7 nan nan nan 0 2007 8 nan nan nan 0 2007 9 nan nan nan 0 2007 10 nan nan nan 0 2007 11 321.58 0.99 0.92 444 2007 12 321.57 1.13 0.96 488 2008 1 321.78 0.92 0.83 719 2008 2 321.97 0.78 0.71 692 2008 3 321.93 0.71 0.70 735 2008 4 321.92 0.80 0.77 707 2008 5 321.84 0.54 0.71 703 2008 6 321.96 0.68 0.79 703 2008 7 322.14 0.64 0.75 713 2008 8 322.43 0.58 0.79 694 2008 9 322.17 0.47 0.65 699 2008 10 322.29 0.62 0.76 726 2008 11 322.35 0.70 0.67 623 2008 12 322.39 0.80 0.77 724 2009 1 322.38 0.74 0.74 727 2009 2 322.39 0.82 0.71 650 2009 3 322.40 0.62 0.67 735 2009 4 322.47 0.65 0.75 675 2009 5 322.54 0.51 0.60 735 2009 6 322.63 0.41 0.60 710 2009 7 322.83 0.40 0.57 732 2009 8 322.73 0.46 0.62 733 2009 9 322.93 0.42 0.55 667 2009 10 322.86 0.70 0.72 635 2009 11 323.12 0.85 0.70 639 2009 12 323.16 1.16 0.83 559 2010 1 323.39 1.23 0.78 565 2010 2 323.50 1.19 0.75 437 2010 3 323.57 1.22 0.79 515 2010 4 323.45 0.92 0.87 371 2010 5 323.52 1.07 0.79 431 2010 6 323.78 0.83 0.47 79 2010 7 323.73 0.64 0.64 569 2010 8 323.79 0.58 0.60 726 2010 9 323.65 0.59 0.64 703 2010 10 323.96 0.63 0.66 720 2010 11 323.99 0.80 0.68 695 2010 12 324.28 0.67 0.68 695 2011 1 324.26 0.89 0.90 708 2011 2 324.23 1.00 0.81 658 2011 3 324.28 0.64 0.66 740 2011 4 324.42 0.62 0.66 709 2011 5 324.34 0.57 0.73 721 2011 6 324.17 0.58 0.64 567 2011 7 324.69 0.66 0.74 721 2011 8 324.96 0.63 0.70 733 2011 9 324.87 0.62 0.56 708 2011 10 324.94 0.74 0.67 726 2011 11 325.15 1.01 0.81 586 2011 12 325.30 0.96 0.75 644 2012 1 325.30 1.04 0.78 344 2012 2 nan nan nan 0 2012 3 325.34 0.82 0.70 473 2012 4 325.42 0.74 0.71 711 2012 5 325.34 0.50 0.64 740 2012 6 325.36 0.56 0.68 630 2012 7 325.63 0.58 0.67 625 2012 8 325.46 0.57 0.64 742 2012 9 325.51 0.52 0.58 712 2012 10 325.53 0.78 0.66 676 2012 11 325.76 0.77 0.71 712 2012 12 325.81 0.91 0.79 736 2013 1 325.92 0.79 0.72 696 2013 2 325.98 0.73 0.67 613 2013 3 325.93 0.62 0.65 742 2013 4 326.02 0.51 0.77 712 2013 5 326.23 0.78 0.86 440 2013 6 326.48 0.53 0.64 709 2013 7 326.79 0.64 0.76 730 2013 8 326.80 0.41 0.53 737 2013 9 326.90 0.69 0.78 672 2013 10 326.67 0.89 0.83 722 2013 11 326.62 1.17 1.44 660 2013 12 326.77 1.16 1.38 696 2014 1 326.99 1.07 1.00 219 2014 2 326.97 0.78 0.65 161 2014 3 nan nan nan 0 2014 4 327.48 0.81 0.66 417 2014 5 327.64 0.68 0.67 531 2014 6 327.65 0.45 0.68 651 2014 7 328.07 1.81 1.66 631 2014 8 328.00 2.04 1.60 554 2014 9 328.42 1.03 1.39 473 2014 10 328.05 1.47 1.86 677 2014 11 328.02 1.86 2.46 661 2014 12 328.18 1.80 1.78 634 2015 1 328.10 1.45 1.47 107 2015 2 328.30 1.00 1.21 182 2015 3 328.26 0.98 1.14 722 2015 4 328.39 0.87 0.88 697 2015 5 328.52 0.92 0.91 641 2015 6 nan nan nan 0 2015 7 nan nan nan 0 2015 8 328.27 0.50 1.36 388 2015 9 328.98 1.18 2.42 430 2015 10 329.02 0.95 2.22 533 2015 11 329.14 1.01 2.30 433 2015 12 329.02 1.10 1.63 418 2016 1 328.70 1.30 1.59 67 2016 2 328.96 1.30 1.37 145 2016 3 329.25 0.94 1.32 305 2016 4 329.38 1.07 1.52 496 2016 5 329.35 1.28 1.03 70 2016 6 329.40 0.86 1.09 312 2016 7 329.41 0.58 1.15 558 2016 8 329.29 0.66 1.47 589 2016 9 329.42 0.87 1.60 627 2016 10 329.89 1.06 2.01 580 2016 11 329.89 0.85 1.87 506 2016 12 329.86 0.37 1.22 646 2017 1 329.86 0.35 1.11 616 2017 2 329.93 0.77 1.11 207 2017 3 nan nan nan 0 2017 4 nan nan nan 0 2017 5 nan nan nan 0 2017 6 nan nan nan 0 2017 7 nan nan nan 0 2017 8 nan nan nan 0 2017 9 nan nan nan 0 2017 10 331.02 1.12 1.78 100 2017 11 331.17 1.10 2.03 449 2017 12 330.73 0.94 1.53 522 2018 1 330.89 0.87 1.44 576 2018 2 331.04 0.53 1.29 589 2018 3 331.00 1.28 1.75 603 2018 4 331.01 1.66 1.74 346 2018 5 nan nan nan 0 2018 6 331.32 0.68 1.39 545 2018 7 331.42 0.80 1.43 323 2018 8 331.71 0.49 1.56 714 2018 9 331.86 0.69 1.52 507 2018 10 nan nan nan 0 2018 11 nan nan nan 0 2018 12 nan nan nan 0 2019 1 nan nan nan 0 2019 2 nan nan nan 0 2019 3 nan nan nan 0 2019 4 333.14 2.36 0.57 66 2019 5 332.92 0.84 0.52 141 2019 6 332.75 0.86 0.40 107 2019 7 332.57 0.43 0.48 484 2019 8 332.53 0.34 0.49 631 2019 9 332.51 1.77 0.76 331 2019 10 332.38 0.64 0.60 134 2019 11 332.63 0.81 0.93 106 2019 12 332.81 0.74 1.34 537 2020 1 332.97 0.77 1.38 674 2020 2 333.33 0.59 1.16 57 2020 3 nan nan nan 0 2020 4 nan nan nan 0 2020 5 333.80 0.57 0.52 221 2020 6 334.04 0.63 0.50 463 2020 7 334.15 0.51 0.53 622 2020 8 334.29 0.43 0.60 677 2020 9 334.38 0.69 0.91 379 2020 10 334.32 0.78 1.08 635 2020 11 334.30 0.82 1.10 616 2020 12 334.24 0.98 1.22 530 2021 1 334.47 0.93 1.53 617 2021 2 334.54 0.77 1.25 603 2021 3 334.72 0.90 1.42 544 2021 4 334.78 0.80 1.31 495 2021 5 334.94 0.77 1.31 344 2021 6 nan nan nan 0 2021 7 334.98 0.47 0.58 313 2021 8 335.07 0.41 0.49 59 2021 9 335.32 0.66 1.31 393 2021 10 335.51 1.26 1.76 618 2021 11 335.17 1.33 0.94 503 2021 12 335.38 0.94 0.94 443 2022 1 335.31 0.58 0.48 618 2022 2 335.32 0.46 0.35 669 2022 3 336.07 0.35 0.44 423 2022 4 336.26 0.47 0.32 287