# file: smo_N2O_MM.dat # date: 2023-08-29 # # Nitrous Oxide (N2O) data from hourly in situ samples analyzed on a gas chromatograph located # at Cape Matatulu (SMO), American Samoa (14.3 S, 170.6 W, elevation: 77 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 # N2OcatsSMOyr N2OcatsSMOmon N2OcatsSMOm N2OcatsSMOunc N2OcatsSMOsd N2OcatsSMOn 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 12 314.51 0.31 0.53 494 1999 1 314.59 0.26 0.46 630 1999 2 314.76 0.25 0.47 606 1999 3 314.57 0.26 0.44 648 1999 4 314.70 0.23 0.45 563 1999 5 314.70 0.25 0.53 545 1999 6 314.69 0.25 0.45 667 1999 7 314.62 0.23 0.41 643 1999 8 314.67 0.25 0.41 552 1999 9 314.67 0.24 0.42 659 1999 10 314.76 0.27 0.46 612 1999 11 314.95 0.27 0.45 631 1999 12 315.15 0.27 0.48 674 2000 1 315.34 0.24 0.39 680 2000 2 315.39 0.26 0.45 677 2000 3 315.65 0.26 0.44 720 2000 4 315.76 0.26 0.47 661 2000 5 315.52 0.25 0.48 554 2000 6 315.34 0.25 0.43 390 2000 7 315.61 0.25 0.45 682 2000 8 315.75 0.25 0.41 698 2000 9 315.76 0.22 0.40 701 2000 10 315.97 0.23 0.43 727 2000 11 315.97 0.28 0.42 642 2000 12 316.26 0.23 0.45 717 2001 1 316.41 0.30 0.44 607 2001 2 316.55 0.79 0.89 483 2001 3 316.59 0.58 0.75 691 2001 4 316.49 0.56 0.53 424 2001 5 316.06 1.04 0.47 491 2001 6 316.28 0.85 0.58 463 2001 7 316.57 0.65 0.40 460 2001 8 316.74 0.87 0.52 296 2001 9 316.62 0.52 0.37 390 2001 10 316.55 0.45 0.33 238 2001 11 317.01 1.24 0.47 287 2001 12 317.05 0.62 0.50 582 2002 1 317.31 0.96 0.36 548 2002 2 317.15 0.32 0.35 583 2002 3 317.38 0.45 0.41 647 2002 4 317.10 0.43 0.40 644 2002 5 316.90 0.43 0.43 364 2002 6 316.81 0.56 0.43 601 2002 7 316.87 0.75 0.48 431 2002 8 316.98 1.07 0.82 336 2002 9 316.94 0.50 0.48 419 2002 10 317.10 0.56 0.46 418 2002 11 317.04 1.06 0.92 329 2002 12 317.45 0.47 0.50 556 2003 1 317.94 0.45 0.57 448 2003 2 317.50 0.45 0.62 497 2003 3 318.06 0.60 0.80 559 2003 4 317.96 0.49 0.74 654 2003 5 317.78 0.43 0.46 132 2003 6 nan nan nan 0 2003 7 317.90 0.36 0.50 597 2003 8 317.99 0.45 0.57 649 2003 9 318.14 0.73 1.07 610 2003 10 318.18 0.41 0.47 591 2003 11 318.27 0.38 0.44 583 2003 12 318.43 0.32 0.38 677 2004 1 318.46 0.46 0.56 312 2004 2 318.78 0.54 0.68 595 2004 3 318.62 0.79 1.00 591 2004 4 318.63 0.68 0.96 645 2004 5 318.35 0.43 0.52 657 2004 6 318.27 0.38 0.45 639 2004 7 318.24 0.38 0.40 652 2004 8 318.61 0.78 0.94 631 2004 9 318.50 0.84 1.06 665 2004 10 318.58 0.89 1.04 692 2004 11 318.80 1.01 1.21 659 2004 12 319.08 0.58 0.91 681 2005 1 319.21 0.42 0.49 681 2005 2 318.88 0.39 0.51 498 2005 3 319.15 0.47 0.55 701 2005 4 319.06 0.47 0.54 683 2005 5 318.60 0.41 0.49 686 2005 6 318.87 0.38 0.37 344 2005 7 318.43 0.29 0.36 95 2005 8 318.93 0.25 0.27 150 2005 9 319.46 0.29 0.35 631 2005 10 319.37 0.26 0.34 670 2005 11 319.83 0.26 0.41 507 2005 12 319.68 0.28 0.34 630 2006 1 320.38 0.35 0.55 562 2006 2 321.03 0.40 0.36 567 2006 3 320.77 0.41 0.49 582 2006 4 320.41 0.39 0.37 556 2006 5 320.89 0.43 0.47 566 2006 6 320.84 0.42 0.43 614 2006 7 320.65 0.37 0.47 551 2006 8 320.56 0.39 0.42 639 2006 9 320.63 0.46 0.50 584 2006 10 320.68 0.54 0.75 556 2006 11 320.50 0.50 0.58 534 2006 12 321.07 0.47 0.64 609 2007 1 320.68 0.55 0.73 679 2007 2 321.30 0.57 0.80 512 2007 3 321.37 0.57 0.87 656 2007 4 321.31 0.58 0.81 620 2007 5 321.25 0.55 0.87 567 2007 6 320.54 0.66 0.96 591 2007 7 320.54 0.67 0.97 682 2007 8 320.44 0.76 1.12 645 2007 9 320.91 0.74 0.98 602 2007 10 321.09 0.72 0.93 582 2007 11 321.43 0.73 1.00 585 2007 12 321.51 0.69 0.93 614 2008 1 321.74 0.68 0.93 631 2008 2 321.70 0.63 0.81 574 2008 3 321.65 0.67 0.84 624 2008 4 321.48 0.71 0.93 621 2008 5 321.65 0.55 0.72 612 2008 6 321.69 0.56 0.76 577 2008 7 321.48 0.56 0.79 637 2008 8 321.60 0.57 0.77 672 2008 9 321.72 0.55 0.72 632 2008 10 321.97 0.51 0.61 626 2008 11 322.44 0.55 0.72 581 2008 12 322.61 0.57 0.81 647 2009 1 322.83 0.60 0.79 614 2009 2 322.81 0.61 0.82 582 2009 3 322.90 0.64 0.89 595 2009 4 322.54 0.73 0.99 563 2009 5 322.48 0.67 0.98 655 2009 6 322.32 0.57 0.86 528 2009 7 322.31 0.41 0.47 525 2009 8 322.30 0.43 0.46 679 2009 9 322.38 0.50 0.61 542 2009 10 322.24 0.67 0.70 475 2009 11 322.45 0.69 0.79 600 2009 12 322.56 0.72 0.74 634 2010 1 322.82 0.71 0.72 548 2010 2 322.55 0.55 0.62 523 2010 3 322.71 0.68 0.70 652 2010 4 322.91 0.69 0.87 210 2010 5 nan nan nan 0 2010 6 323.19 0.74 0.81 92 2010 7 322.95 0.63 0.89 531 2010 8 323.06 0.70 0.80 556 2010 9 323.48 0.72 0.79 202 2010 10 nan nan nan 0 2010 11 nan nan nan 0 2010 12 nan nan nan 0 2011 1 nan nan nan 0 2011 2 323.94 0.60 0.70 92 2011 3 324.03 1.18 0.89 577 2011 4 323.77 0.54 0.74 651 2011 5 323.74 0.36 0.64 677 2011 6 323.71 0.35 0.44 691 2011 7 323.81 0.45 0.51 615 2011 8 323.95 0.47 0.65 707 2011 9 324.63 0.46 0.59 677 2011 10 324.64 0.43 0.60 644 2011 11 324.77 0.38 0.64 681 2011 12 324.79 0.33 0.65 726 2012 1 324.93 0.35 0.69 694 2012 2 325.25 0.39 0.65 665 2012 3 325.03 0.74 1.03 571 2012 4 324.84 0.77 1.00 706 2012 5 324.89 0.81 0.79 66 2012 6 324.94 1.01 1.29 468 2012 7 324.75 0.81 1.25 653 2012 8 325.02 0.87 1.26 697 2012 9 325.09 0.76 1.23 619 2012 10 325.18 0.79 1.09 634 2012 11 325.33 0.70 1.00 672 2012 12 325.34 0.70 1.09 508 2013 1 325.58 0.72 1.10 691 2013 2 325.53 0.71 1.12 555 2013 3 325.63 0.68 0.89 678 2013 4 325.67 0.72 0.87 623 2013 5 325.57 0.81 1.04 727 2013 6 325.47 0.83 1.01 630 2013 7 325.64 0.77 0.89 649 2013 8 326.13 0.49 0.73 692 2013 9 326.03 0.45 0.72 659 2013 10 325.90 0.48 0.79 705 2013 11 325.93 0.55 1.04 669 2013 12 326.01 0.56 1.04 673 2014 1 326.32 0.57 1.05 608 2014 2 326.52 0.61 1.14 607 2014 3 326.59 0.60 1.11 223 2014 4 325.81 0.58 0.97 151 2014 5 325.68 0.56 1.18 154 2014 6 326.00 0.73 1.44 146 2014 7 326.85 0.68 1.14 290 2014 8 326.60 0.72 1.17 284 2014 9 326.90 0.53 0.97 313 2014 10 327.32 0.49 0.78 661 2014 11 327.38 0.47 0.75 651 2014 12 327.28 0.45 0.71 608 2015 1 327.87 0.41 0.71 593 2015 2 328.02 1.16 0.63 249 2015 3 327.87 1.30 1.11 387 2015 4 327.84 1.68 1.01 292 2015 5 327.56 0.76 1.13 536 2015 6 327.49 0.64 1.30 112 2015 7 327.74 0.59 0.95 642 2015 8 327.77 0.64 0.80 711 2015 9 327.94 0.68 0.82 659 2015 10 327.99 0.63 0.84 653 2015 11 328.21 0.67 0.88 672 2015 12 328.36 0.60 0.81 520 2016 1 328.35 0.54 0.80 732 2016 2 328.38 0.69 0.94 675 2016 3 328.58 0.64 0.84 511 2016 4 328.51 1.61 2.23 458 2016 5 328.11 1.66 2.48 654 2016 6 328.37 1.84 2.70 662 2016 7 328.07 1.96 2.72 276 2016 8 nan nan nan 0 2016 9 328.78 0.45 0.64 563 2016 10 328.93 0.53 0.74 532 2016 11 328.94 0.47 0.76 613 2016 12 329.16 0.43 0.71 704 2017 1 329.29 0.47 0.74 655 2017 2 329.56 0.49 0.73 636 2017 3 329.30 0.47 0.78 660 2017 4 329.31 0.50 0.77 658 2017 5 329.37 0.45 0.74 713 2017 6 329.14 0.66 0.71 107 2017 7 329.48 0.44 0.71 143 2017 8 329.58 0.53 0.78 633 2017 9 329.75 0.54 0.76 694 2017 10 329.92 0.54 0.80 720 2017 11 330.23 0.45 0.69 386 2017 12 nan nan nan 0 2018 1 nan nan nan 0 2018 2 nan nan nan 0 2018 3 nan nan nan 0 2018 4 nan nan nan 0 2018 5 nan nan nan 0 2018 6 nan nan nan 0 2018 7 nan nan nan 0 2018 8 nan nan nan 0 2018 9 nan nan nan 0 2018 10 nan nan nan 0 2018 11 331.03 1.30 0.81 363 2018 12 331.16 0.52 0.87 702 2019 1 331.83 0.51 0.87 496 2019 2 331.91 0.59 0.89 638 2019 3 331.88 0.71 1.00 641 2019 4 331.69 0.76 1.06 439 2019 5 331.64 0.71 1.04 534 2019 6 331.52 0.79 0.97 658 2019 7 331.42 0.77 1.11 627 2019 8 331.87 0.76 1.06 576 2019 9 331.69 0.81 1.06 279 2019 10 331.87 0.74 0.97 724 2019 11 331.97 0.76 0.98 606 2019 12 332.34 0.83 1.04 497 2020 1 332.37 0.78 1.13 608 2020 2 332.61 0.77 0.99 495 2020 3 332.68 0.81 1.03 728 2020 4 332.52 0.83 1.03 485 2020 5 332.60 0.80 1.02 707 2020 6 332.23 0.74 1.05 669 2020 7 332.56 0.60 0.89 717 2020 8 332.66 0.54 0.86 726 2020 9 333.05 0.56 0.85 714 2020 10 333.25 0.71 1.00 511 2020 11 333.82 0.77 1.05 617 2020 12 334.02 0.75 1.02 710 2021 1 334.08 0.68 0.97 677 2021 2 334.34 1.53 1.05 622 2021 3 334.90 1.43 0.99 38 2021 4 nan nan nan 0 2021 5 nan nan nan 0 2021 6 nan nan nan 0 2021 7 nan nan nan 0 2021 8 nan nan nan 0 2021 9 nan nan nan 0 2021 10 nan nan nan 0 2021 11 nan nan nan 0 2021 12 nan nan nan 0 2022 1 nan nan nan 0 2022 2 nan nan nan 0 2022 3 nan nan nan 0 2022 4 335.43 0.80 1.14 522 2022 5 335.26 0.77 1.02 723 2022 6 335.21 0.66 0.95 597 2022 7 334.89 0.58 0.92 337 2022 8 334.51 0.80 1.33 362 2022 9 335.21 0.62 1.10 299 2022 10 335.72 0.48 0.82 740 2022 11 335.77 1.61 0.81 118 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 2023 5 nan nan nan 0 2023 6 nan nan nan 0 2023 7 nan nan nan 0 2023 8 nan nan nan 0