# file: nwr_N2O_MM.dat # date: 2023-08-29 # # 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/GML 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. # # Data use policy see https://gml.noaa.gov/hats/hats_datause.html # # Citation: # G.S. Dutton and B.D. Hall (2023), # Global Atmospheric Nitrous Oxide Dry Air Mole Fractions from the # NOAA GML Halocarbons in situ Network, 1998-2023, Version: 2023-08-29, # https://doi.org/10.7289/V5X0659V # # For contact information see https://gml.noaa.gov/about/stafflist.html # # Calibration scale used: NOAA 2006A # More information about the calibration scale can be found at: https://gml.noaa.gov/ccl/ # # See (http://www.esrl.noaa.gov/gmd/obop/) for station statistics and personnel. # # 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 2.96 2.23 617 2001 10 317.22 1.83 2.12 736 2001 11 317.68 2.12 2.24 694 2001 12 317.85 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 0.97 1.04 698 2002 4 317.61 1.05 1.26 697 2002 5 317.82 1.50 1.61 697 2002 6 318.54 0.68 1.05 693 2002 7 318.64 0.47 0.77 699 2002 8 318.13 0.36 0.64 618 2002 9 318.92 0.40 0.60 160 2002 10 318.82 3.49 1.48 528 2002 11 318.34 4.09 1.42 571 2002 12 318.61 1.16 1.12 627 2003 1 318.67 0.81 0.81 564 2003 2 318.82 0.59 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 6 319.05 1.11 1.77 503 2003 7 319.01 1.18 1.77 579 2003 8 318.50 1.02 1.52 716 2003 9 318.49 1.06 1.58 586 2003 10 318.71 0.85 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 1.00 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 2.76 1.86 113 2004 7 318.82 2.03 1.80 392 2004 8 318.87 3.10 1.62 287 2004 9 318.99 3.12 1.68 335 2004 10 319.20 1.08 1.56 601 2004 11 319.82 1.28 1.51 644 2004 12 319.46 1.68 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 7 319.15 2.55 3.17 446 2005 8 319.59 2.16 2.52 203 2005 9 318.79 2.27 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 1.90 2.48 55 2006 2 320.01 1.81 2.32 321 2006 3 319.84 2.02 2.24 363 2006 4 319.70 2.01 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 1.00 0.92 444 2007 12 321.56 1.14 0.96 488 2008 1 321.78 0.92 0.83 719 2008 2 321.97 0.77 0.71 692 2008 3 321.93 0.71 0.70 735 2008 4 321.91 0.80 0.77 707 2008 5 321.84 0.54 0.71 703 2008 6 321.96 0.66 0.79 703 2008 7 322.13 0.63 0.75 713 2008 8 322.42 0.58 0.79 694 2008 9 322.18 0.46 0.65 699 2008 10 322.29 0.62 0.76 726 2008 11 322.35 0.70 0.67 623 2008 12 322.40 0.80 0.77 724 2009 1 322.38 0.74 0.74 727 2009 2 322.39 0.81 0.71 650 2009 3 322.40 0.61 0.67 735 2009 4 322.48 0.64 0.76 675 2009 5 322.54 0.51 0.60 735 2009 6 322.62 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 0.71 0.72 635 2009 11 323.12 0.86 0.70 639 2009 12 323.16 1.17 0.83 559 2010 1 323.39 1.21 0.78 565 2010 2 323.49 1.21 0.75 437 2010 3 323.56 1.22 0.79 515 2010 4 323.45 0.91 0.87 371 2010 5 323.52 1.05 0.79 431 2010 6 323.78 1.15 0.47 79 2010 7 323.73 0.63 0.64 569 2010 8 323.79 0.57 0.60 726 2010 9 323.64 0.58 0.64 703 2010 10 323.96 0.63 0.65 720 2010 11 323.99 0.81 0.68 695 2010 12 324.28 0.68 0.68 695 2011 1 324.26 0.88 0.90 708 2011 2 324.24 1.00 0.81 658 2011 3 324.28 0.64 0.66 740 2011 4 324.43 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 8 324.95 0.64 0.70 733 2011 9 324.87 0.62 0.56 708 2011 10 324.95 0.74 0.67 726 2011 11 325.15 1.02 0.81 586 2011 12 325.30 0.96 0.75 644 2012 1 325.30 0.94 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 0.51 0.64 740 2012 6 325.37 0.56 0.68 630 2012 7 325.63 0.58 0.66 625 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 11 325.77 0.77 0.71 712 2012 12 325.81 0.91 0.79 736 2013 1 325.92 0.78 0.72 696 2013 2 325.98 0.73 0.67 613 2013 3 325.92 0.62 0.65 742 2013 4 326.02 0.51 0.77 712 2013 5 326.23 0.78 0.86 440 2013 6 326.47 0.53 0.64 709 2013 7 326.79 0.64 0.76 730 2013 8 326.80 0.42 0.53 737 2013 9 326.90 0.68 0.78 672 2013 10 326.67 0.87 0.83 722 2013 11 326.62 1.16 1.44 660 2013 12 326.77 1.18 1.38 696 2014 1 326.99 1.08 1.01 219 2014 2 326.96 0.78 0.65 161 2014 3 nan nan nan 0 2014 4 327.48 0.82 0.67 417 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 2.10 1.59 554 2014 9 328.43 1.01 1.38 473 2014 10 328.06 1.47 1.86 677 2014 11 327.98 1.86 2.46 661 2014 12 328.19 1.79 1.77 634 2015 1 328.11 1.45 1.43 107 2015 2 328.28 0.99 1.21 182 2015 3 328.27 0.98 1.14 722 2015 4 328.39 0.87 0.88 697 2015 5 328.53 0.93 0.91 641 2015 6 nan nan nan 0 2015 7 nan nan nan 0 2015 8 328.26 0.52 1.36 388 2015 9 329.02 1.18 2.40 430 2015 10 329.02 0.95 2.21 533 2015 11 329.14 1.02 2.32 433 2015 12 329.02 1.11 1.64 418 2016 1 328.74 1.31 1.59 67 2016 2 328.96 1.32 1.37 145 2016 3 329.23 0.97 1.32 305 2016 4 329.37 1.06 1.53 496 2016 5 329.34 1.27 1.03 70 2016 6 329.40 0.86 1.09 312 2016 7 329.41 0.55 1.15 558 2016 8 329.29 0.67 1.47 589 2016 9 329.43 0.85 1.60 627 2016 10 329.89 1.05 2.01 580 2016 11 329.88 0.86 1.87 506 2016 12 329.86 0.38 1.22 646 2017 1 329.85 0.36 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 10 331.05 1.13 1.78 100 2017 11 331.19 1.13 2.03 449 2017 12 330.73 0.94 1.53 522 2018 1 330.89 0.88 1.44 576 2018 2 331.03 0.53 1.29 589 2018 3 331.01 1.27 1.75 603 2018 4 331.03 1.64 1.75 346 2018 5 nan nan nan 0 2018 6 331.32 0.67 1.39 545 2018 7 331.41 0.79 1.43 323 2018 8 331.70 0.49 1.56 714 2018 9 331.87 0.70 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 nan nan nan 0 2019 5 nan nan nan 0 2019 6 nan nan nan 0 2019 7 332.66 0.64 1.96 200 2019 8 332.51 0.50 1.90 631 2019 9 332.54 2.84 2.87 327 2019 10 331.87 1.01 2.35 134 2019 11 332.45 1.05 3.98 106 2019 12 332.73 1.07 5.56 537 2020 1 332.89 1.16 5.84 674 2020 2 334.13 0.86 4.92 57 2020 3 nan nan nan 0 2020 4 nan nan nan 0 2020 5 333.88 0.90 2.05 221 2020 6 334.04 0.99 1.92 463 2020 7 334.06 0.73 2.07 622 2020 8 334.23 0.67 2.30 677 2020 9 334.29 0.91 3.56 379 2020 10 333.96 1.20 4.32 635 2020 11 333.73 1.18 4.71 616 2020 12 333.56 1.41 5.46 530 2021 1 334.22 1.35 6.02 604 2021 2 334.61 1.12 5.75 600 2021 3 334.91 1.22 6.22 541 2021 4 335.02 1.15 5.62 495 2021 5 335.33 1.14 5.75 343 2021 6 nan nan nan 0 2021 7 334.93 0.69 2.20 299 2021 8 334.83 0.58 1.94 58 2021 9 334.47 0.99 2.31 99 2021 10 335.28 1.35 1.15 156 2021 11 335.15 0.94 1.20 398 2021 12 335.36 0.63 1.08 440 2022 1 335.31 0.38 0.48 618 2022 2 335.32 0.31 0.35 669 2022 3 336.07 0.25 0.44 422 2022 4 336.26 0.35 0.31 311 2022 5 336.22 0.69 1.15 291 2022 6 336.19 0.90 1.71 334 2022 7 336.57 0.84 1.73 201 2022 8 335.87 1.12 1.97 586 2022 9 335.58 0.96 1.78 695 2022 10 335.50 0.79 1.28 673 2022 11 335.65 0.41 0.63 714 2022 12 335.71 0.47 0.78 644 2023 1 335.73 0.50 0.69 578 2023 2 335.76 0.83 0.98 345 2023 3 335.84 1.10 1.03 461 2023 4 nan nan nan 0 2023 5 nan nan nan 0 2023 6 nan nan nan 0 2023 7 nan nan nan 0 2023 8 nan nan nan 0