# file: mlo_N2O_MM.dat # date: 2023-04-13 # # Nitrous Oxide (N2O) data from hourly in situ samples analyzed on a gas chromatograph located # at Mauna Loa (MLO), Hawaii (19.539 N, 155.578 W, elevation: 3397 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: 2023-04-13, # 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 # N2OcatsMLOyr N2OcatsMLOmon N2OcatsMLOm N2OcatsMLOunc N2OcatsMLOsd N2OcatsMLOn 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 7 315.16 0.32 0.50 546 1999 8 315.07 0.29 0.45 643 1999 9 315.08 0.27 0.43 473 1999 10 315.17 0.26 0.39 615 1999 11 315.46 0.28 0.72 569 1999 12 315.42 0.41 0.47 392 2000 1 315.54 0.40 0.53 551 2000 2 315.78 0.42 0.51 621 2000 3 315.70 0.39 0.55 705 2000 4 315.79 0.40 0.55 680 2000 5 315.76 0.39 0.54 644 2000 6 316.03 0.38 0.52 533 2000 7 316.17 0.37 0.52 566 2000 8 315.83 0.36 0.54 161 2000 9 316.62 0.28 0.51 213 2000 10 316.49 0.31 0.49 682 2000 11 316.71 0.60 1.17 139 2000 12 316.53 0.65 1.40 636 2001 1 316.61 0.70 1.82 434 2001 2 316.72 0.73 1.88 648 2001 3 316.69 0.81 1.95 730 2001 4 316.54 0.68 1.66 697 2001 5 316.58 0.57 1.41 739 2001 6 316.65 0.85 1.68 350 2001 7 316.82 0.59 1.37 637 2001 8 316.94 0.63 1.42 724 2001 9 317.05 0.62 1.47 708 2001 10 317.29 0.85 1.65 675 2001 11 317.40 0.76 1.71 629 2001 12 317.40 0.73 1.62 630 2002 1 317.51 0.68 1.50 670 2002 2 317.16 0.76 1.73 660 2002 3 317.50 0.92 1.59 651 2002 4 317.48 0.93 1.83 674 2002 5 317.91 0.82 1.73 282 2002 6 nan nan nan 0 2002 7 nan nan nan 0 2002 8 nan nan nan 0 2002 9 317.49 0.40 0.56 141 2002 10 317.71 0.34 0.63 679 2002 11 317.81 0.32 0.54 676 2002 12 317.77 0.26 0.54 699 2003 1 317.91 0.26 0.54 675 2003 2 317.79 0.23 0.52 636 2003 3 318.05 0.25 0.53 735 2003 4 318.07 0.25 0.57 692 2003 5 318.18 0.23 0.52 726 2003 6 318.18 0.25 0.54 695 2003 7 318.29 0.27 0.55 686 2003 8 318.34 0.31 0.61 689 2003 9 318.52 0.30 0.52 666 2003 10 318.60 0.33 0.56 691 2003 11 318.61 0.24 0.50 692 2003 12 318.64 0.25 0.50 732 2004 1 318.76 0.25 0.49 725 2004 2 318.69 0.30 0.57 659 2004 3 318.65 0.25 0.58 672 2004 4 318.75 0.24 0.54 706 2004 5 318.85 0.25 0.54 697 2004 6 318.90 0.24 0.52 680 2004 7 318.94 0.25 0.51 626 2004 8 319.03 0.33 0.59 583 2004 9 319.11 0.32 0.56 636 2004 10 319.20 0.27 0.49 699 2004 11 319.33 0.26 0.56 704 2004 12 319.34 0.27 0.53 678 2005 1 319.46 0.26 0.48 636 2005 2 319.53 0.21 0.45 633 2005 3 319.56 0.25 0.55 700 2005 4 319.55 0.24 0.51 681 2005 5 319.64 0.21 0.50 706 2005 6 319.66 0.23 0.49 662 2005 7 319.80 0.21 0.48 678 2005 8 319.96 0.33 0.66 709 2005 9 319.83 0.34 0.66 700 2005 10 319.91 0.46 0.63 722 2005 11 319.92 0.37 0.60 707 2005 12 320.16 0.29 0.60 590 2006 1 320.19 0.30 0.55 698 2006 2 320.17 0.29 0.53 599 2006 3 320.08 0.26 0.55 716 2006 4 320.29 0.29 0.63 692 2006 5 320.27 0.25 0.64 687 2006 6 320.40 0.26 0.54 653 2006 7 320.43 0.25 0.56 244 2006 8 320.47 0.38 0.67 124 2006 9 320.50 0.28 0.59 524 2006 10 320.71 0.31 0.59 617 2006 11 320.73 0.30 0.63 680 2006 12 320.94 0.36 0.71 672 2007 1 320.96 0.37 0.67 690 2007 2 321.06 0.31 0.66 645 2007 3 320.97 0.30 0.65 707 2007 4 321.24 0.37 0.67 671 2007 5 321.18 0.36 0.65 695 2007 6 321.28 0.29 0.66 690 2007 7 321.32 0.30 0.67 688 2007 8 321.34 0.42 0.73 585 2007 9 321.41 0.36 0.67 673 2007 10 321.55 0.30 0.64 677 2007 11 321.70 0.33 0.57 595 2007 12 321.75 0.38 0.47 643 2008 1 321.94 0.39 0.47 424 2008 2 321.90 0.35 0.59 71 2008 3 321.88 0.29 0.47 724 2008 4 322.05 0.21 0.54 712 2008 5 322.01 0.23 0.46 721 2008 6 322.09 0.21 0.43 691 2008 7 322.25 0.19 0.43 728 2008 8 322.29 0.20 0.47 736 2008 9 322.39 0.21 0.44 700 2008 10 322.63 0.23 0.50 705 2008 11 322.63 0.24 0.45 705 2008 12 322.67 0.23 0.51 710 2009 1 322.75 0.24 0.50 563 2009 2 322.68 0.19 0.43 667 2009 3 322.62 0.22 0.51 721 2009 4 322.75 0.20 0.44 711 2009 5 322.88 0.22 0.51 728 2009 6 322.89 0.21 0.46 702 2009 7 322.84 0.20 0.43 731 2009 8 322.95 0.18 0.42 739 2009 9 323.07 0.19 0.41 719 2009 10 323.12 0.19 0.41 740 2009 11 323.21 0.18 0.40 703 2009 12 323.35 0.18 0.40 738 2010 1 323.48 0.30 0.67 681 2010 2 323.37 0.52 0.96 318 2010 3 nan nan nan 0 2010 4 323.58 0.20 0.40 685 2010 5 323.67 0.25 0.45 714 2010 6 323.77 0.25 0.39 701 2010 7 323.75 0.22 0.42 727 2010 8 323.85 0.22 0.45 626 2010 9 323.93 0.21 0.45 580 2010 10 324.20 0.22 0.48 738 2010 11 324.32 0.23 0.52 703 2010 12 324.46 0.24 0.51 684 2011 1 324.43 0.27 0.52 577 2011 2 324.51 0.25 0.49 667 2011 3 324.57 0.28 0.55 728 2011 4 324.58 0.33 0.60 618 2011 5 324.57 0.27 0.58 737 2011 6 324.59 0.29 0.49 663 2011 7 324.71 0.23 0.47 741 2011 8 324.85 0.20 0.44 738 2011 9 324.93 0.19 0.43 709 2011 10 325.08 0.21 0.44 735 2011 11 325.10 0.16 0.40 676 2011 12 325.20 0.20 0.41 727 2012 1 325.39 0.22 0.47 738 2012 2 325.50 0.30 0.51 690 2012 3 325.33 0.23 0.46 581 2012 4 325.47 0.23 0.48 719 2012 5 325.42 0.25 0.55 727 2012 6 325.39 0.21 0.47 685 2012 7 325.45 0.22 0.53 737 2012 8 325.57 0.24 0.49 728 2012 9 325.72 0.37 0.89 681 2012 10 325.95 0.45 1.19 709 2012 11 325.94 0.42 1.09 667 2012 12 326.05 0.19 0.45 730 2013 1 326.12 0.18 0.44 727 2013 2 326.14 0.20 0.42 625 2013 3 326.16 0.17 0.40 733 2013 4 326.32 0.17 0.43 705 2013 5 326.47 0.18 0.37 703 2013 6 326.37 0.23 0.40 715 2013 7 326.37 0.23 0.44 685 2013 8 326.56 0.24 0.44 430 2013 9 326.58 0.22 0.41 700 2013 10 326.62 0.21 0.40 728 2013 11 326.80 0.20 0.40 719 2013 12 326.90 0.21 0.41 734 2014 1 327.03 0.21 0.42 731 2014 2 327.19 0.21 0.40 665 2014 3 327.31 0.24 0.40 707 2014 4 327.38 0.24 0.45 707 2014 5 327.73 0.22 0.43 666 2014 6 327.82 0.22 0.39 709 2014 7 327.96 0.41 0.50 651 2014 8 327.60 0.40 0.42 588 2014 9 327.66 0.42 0.45 685 2014 10 327.85 0.34 0.40 607 2014 11 327.90 0.23 0.38 699 2014 12 327.97 0.23 0.32 699 2015 1 328.09 0.26 0.37 719 2015 2 328.13 0.25 0.35 669 2015 3 328.17 0.34 0.57 707 2015 4 328.27 0.21 0.47 680 2015 5 328.31 0.31 0.55 717 2015 6 328.23 0.26 0.47 644 2015 7 328.29 0.24 0.44 725 2015 8 328.38 0.33 0.61 663 2015 9 328.70 0.28 0.63 689 2015 10 328.84 0.28 0.55 725 2015 11 328.88 0.26 0.54 699 2015 12 328.91 0.23 0.47 667 2016 1 329.07 0.23 0.48 736 2016 2 329.04 0.25 0.54 682 2016 3 329.10 0.26 0.53 618 2016 4 329.22 0.32 0.55 694 2016 5 329.29 0.30 0.58 715 2016 6 329.32 0.35 0.63 695 2016 7 329.46 0.36 0.66 739 2016 8 329.67 0.35 0.66 702 2016 9 329.70 0.47 0.88 654 2016 10 329.95 0.74 1.00 669 2016 11 330.04 0.47 1.01 695 2016 12 329.99 0.45 0.93 669 2017 1 330.18 0.48 0.96 679 2017 2 330.17 0.49 1.06 654 2017 3 330.29 0.68 1.23 722 2017 4 330.20 0.85 1.38 698 2017 5 330.29 0.68 1.23 736 2017 6 330.32 0.92 1.22 710 2017 7 330.36 0.70 1.38 401 2017 8 330.74 0.71 1.13 731 2017 9 330.76 0.51 1.16 712 2017 10 330.91 0.57 1.26 725 2017 11 331.01 0.54 1.15 700 2017 12 331.16 0.62 1.23 720 2018 1 331.14 0.57 1.27 731 2018 2 331.22 0.76 1.24 659 2018 3 331.05 0.77 1.22 545 2018 4 331.61 0.67 1.33 703 2018 5 331.61 0.80 1.25 666 2018 6 331.63 0.93 1.38 477 2018 7 331.61 0.79 1.53 572 2018 8 331.73 0.71 1.14 707 2018 9 331.78 0.54 1.24 688 2018 10 331.88 0.60 1.32 658 2018 11 331.99 0.68 1.15 707 2018 12 331.97 0.76 1.38 742 2019 1 331.83 0.73 1.53 722 2019 2 331.93 1.43 1.61 171 2019 3 nan nan nan 0 2019 4 nan nan nan 0 2019 5 nan nan nan 0 2019 6 332.58 1.02 1.01 717 2019 7 332.64 0.90 1.01 743 2019 8 332.75 0.95 1.22 701 2019 9 332.87 1.27 1.30 441 2019 10 332.97 0.60 0.85 732 2019 11 333.23 0.74 1.03 710 2019 12 333.29 0.69 1.12 611 2020 1 333.41 0.75 1.18 652 2020 2 333.48 0.82 1.19 689 2020 3 333.65 0.92 1.25 643 2020 4 333.71 1.29 1.55 672 2020 5 334.03 1.53 2.45 690 2020 6 333.67 1.78 1.89 702 2020 7 334.07 1.63 2.12 678 2020 8 334.01 1.19 1.79 718 2020 9 334.14 1.04 1.95 687 2020 10 334.19 1.16 2.18 731 2020 11 334.21 0.99 1.65 342 2020 12 334.54 0.89 1.82 722 2021 1 334.35 0.94 1.69 510 2021 2 334.55 0.99 1.61 643 2021 3 334.60 1.06 1.81 666 2021 4 334.74 0.95 1.82 680 2021 5 334.89 0.85 1.36 721 2021 6 334.89 1.31 1.55 704 2021 7 335.25 1.57 1.74 708 2021 8 335.31 0.94 1.47 687 2021 9 335.44 1.09 1.65 687 2021 10 335.72 0.77 1.32 730 2021 11 335.69 0.65 1.05 698 2021 12 335.93 0.80 1.27 645 2022 1 335.49 0.80 1.11 651 2022 2 336.26 0.69 1.13 638 2022 3 336.28 0.71 1.19 718 2022 4 336.58 0.59 1.12 662 2022 5 336.80 0.76 1.11 724 2022 6 336.92 1.05 1.22 682 2022 7 336.98 0.98 1.14 725 2022 8 337.03 0.64 1.15 714 2022 9 337.15 0.73 1.24 695 2022 10 337.39 1.08 2.03 665 2022 11 337.50 1.08 2.31 656 2022 12 nan nan nan 0 2023 1 nan nan nan 0 2023 2 nan nan nan 0 2023 3 nan nan nan 0 2023 4 nan nan nan 0