# file: spo_N2O_MM.dat # date: 2024-02-09 # # Nitrous Oxide (N2O) data from hourly in situ samples analyzed on a gas chromatograph located # at South Pole (SPO) station Antarctica (89.98 S, 24.80 W, elevation: 2810 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 (2024), # Global Atmospheric Nitrous Oxide Dry Air Mole Fractions from the # NOAA GML Halocarbons in situ Network, 1998-2024, Version: 2024-02-09, # 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 # N2OcatsSPOyr N2OcatsSPOmon N2OcatsSPOm N2OcatsSPOunc N2OcatsSPOsd N2OcatsSPOn 1998 1 313.14 1.07 0.99 42 1998 2 312.60 0.95 0.78 234 1998 3 312.55 0.80 0.69 415 1998 4 312.58 0.45 0.65 594 1998 5 312.81 0.47 0.79 665 1998 6 312.82 0.54 0.74 623 1998 7 312.96 0.52 0.54 515 1998 8 313.07 1.20 0.80 282 1998 9 313.00 2.07 0.99 476 1998 10 313.08 1.42 1.00 321 1998 11 313.08 1.32 0.90 416 1998 12 312.62 1.23 0.91 211 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 5 313.59 0.63 0.67 416 1999 6 313.63 0.63 0.61 628 1999 7 313.42 0.65 0.69 629 1999 8 313.50 0.92 0.73 598 1999 9 313.71 0.89 0.75 419 1999 10 313.79 0.92 0.84 540 1999 11 313.88 0.42 0.64 615 1999 12 313.98 0.35 0.65 601 2000 1 314.01 0.49 0.68 596 2000 2 313.97 0.49 0.68 567 2000 3 314.03 0.74 0.86 602 2000 4 314.10 0.69 0.76 611 2000 5 314.08 0.56 0.68 658 2000 6 314.13 0.57 0.63 503 2000 7 314.21 0.66 0.70 482 2000 8 314.51 0.73 0.74 563 2000 9 315.12 0.70 0.73 564 2000 10 315.28 0.86 0.93 627 2000 11 315.21 0.77 0.75 505 2000 12 315.26 0.83 0.63 512 2001 1 315.32 0.71 0.70 523 2001 2 315.26 0.72 0.72 358 2001 3 314.95 0.81 0.62 337 2001 4 315.00 0.87 0.79 655 2001 5 314.95 0.78 0.80 671 2001 6 315.18 1.45 1.24 559 2001 7 315.46 1.95 1.53 497 2001 8 315.52 1.29 1.12 373 2001 9 315.56 1.25 0.98 432 2001 10 315.83 1.30 1.14 608 2001 11 316.09 1.04 0.86 575 2001 12 316.15 1.09 1.00 510 2002 1 316.04 1.36 1.19 475 2002 2 316.13 1.20 1.25 417 2002 3 315.85 1.12 1.20 602 2002 4 315.56 1.32 1.38 507 2002 5 315.69 1.26 1.16 544 2002 6 315.41 1.73 1.52 581 2002 7 315.72 1.42 1.28 433 2002 8 316.43 2.12 1.79 571 2002 9 316.48 1.68 1.41 402 2002 10 316.70 1.22 1.13 458 2002 11 315.89 1.56 1.46 189 2002 12 316.32 1.44 1.40 647 2003 1 316.55 0.78 0.93 568 2003 2 316.34 0.81 0.96 557 2003 3 316.23 1.85 1.44 657 2003 4 316.49 2.20 1.73 553 2003 5 316.38 1.86 1.63 670 2003 6 316.39 1.70 1.51 672 2003 7 316.66 2.76 1.98 625 2003 8 317.16 2.71 2.14 685 2003 9 317.33 2.54 2.01 656 2003 10 317.27 2.22 1.93 609 2003 11 317.35 2.39 1.89 507 2003 12 317.35 1.09 1.27 466 2004 1 317.41 0.80 1.15 245 2004 2 317.33 0.87 1.12 598 2004 3 317.32 0.78 1.01 621 2004 4 317.37 0.75 0.96 622 2004 5 317.09 0.64 0.87 675 2004 6 317.21 0.60 0.80 568 2004 7 317.36 0.70 0.84 595 2004 8 317.64 0.75 0.91 605 2004 9 317.78 0.92 0.95 568 2004 10 317.92 0.96 1.08 688 2004 11 318.08 1.00 1.00 384 2004 12 318.03 0.86 1.12 663 2005 1 318.00 0.91 1.19 689 2005 2 317.99 1.04 1.14 491 2005 3 317.98 1.12 1.06 151 2005 4 317.67 0.91 1.06 461 2005 5 317.61 0.89 0.91 499 2005 6 317.66 1.03 1.14 349 2005 7 317.92 0.72 1.08 691 2005 8 318.22 0.70 1.03 682 2005 9 318.49 0.81 1.16 661 2005 10 318.68 0.98 1.23 686 2005 11 318.89 0.93 1.20 654 2005 12 318.94 1.02 1.32 494 2006 1 318.80 0.69 0.94 494 2006 2 318.83 0.73 1.09 624 2006 3 318.66 0.97 1.09 694 2006 4 318.54 1.08 1.13 678 2006 5 318.59 0.94 1.09 560 2006 6 318.83 0.65 1.03 671 2006 7 318.81 0.74 1.01 707 2006 8 319.02 0.74 1.01 688 2006 9 319.25 0.70 1.01 674 2006 10 319.31 0.66 0.99 726 2006 11 319.49 0.63 0.90 644 2006 12 319.44 0.67 1.00 650 2007 1 319.42 1.04 1.62 601 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 6 319.30 0.49 0.55 642 2007 7 319.47 0.48 0.60 680 2007 8 319.68 0.53 0.61 676 2007 9 319.96 0.56 0.55 650 2007 10 320.07 0.38 0.51 701 2007 11 320.27 0.32 0.48 642 2007 12 320.35 0.34 0.50 663 2008 1 320.53 0.35 0.55 644 2008 2 320.57 0.39 0.53 625 2008 3 320.45 0.39 0.55 673 2008 4 320.36 0.35 0.54 620 2008 5 320.29 0.36 0.55 656 2008 6 320.48 0.33 0.46 622 2008 7 320.69 0.36 0.56 651 2008 8 320.89 0.38 0.58 578 2008 9 321.04 0.38 0.54 613 2008 10 321.15 0.43 0.55 673 2008 11 321.36 0.42 0.56 639 2008 12 321.40 0.36 0.54 636 2009 1 321.40 0.39 0.55 590 2009 2 321.48 0.41 0.45 608 2009 3 321.31 0.33 0.39 656 2009 4 321.10 0.25 0.36 618 2009 5 321.13 0.28 0.36 658 2009 6 321.25 0.23 0.34 670 2009 7 321.42 0.22 0.33 617 2009 8 321.62 0.22 0.34 663 2009 9 321.89 0.24 0.33 683 2009 10 322.07 0.38 0.44 665 2009 11 322.14 0.44 0.41 663 2009 12 322.19 0.29 0.34 680 2010 1 322.26 0.23 0.35 687 2010 2 322.23 0.31 0.37 601 2010 3 322.11 0.33 0.39 688 2010 4 322.09 0.34 0.36 662 2010 5 322.06 0.24 0.32 663 2010 6 322.14 0.35 0.40 593 2010 7 322.33 0.33 0.36 594 2010 8 322.64 0.27 0.35 641 2010 9 322.76 0.27 0.34 629 2010 10 322.87 0.37 0.47 584 2010 11 323.03 0.41 0.59 646 2010 12 323.07 0.37 0.58 631 2011 1 323.24 0.39 0.57 721 2011 2 323.26 0.57 0.64 642 2011 3 323.18 0.47 0.64 717 2011 4 323.03 0.45 0.63 688 2011 5 323.05 0.48 0.65 673 2011 6 323.16 0.48 0.65 693 2011 7 323.32 0.46 0.64 672 2011 8 323.52 0.49 0.63 377 2011 9 323.69 0.57 0.69 348 2011 10 323.82 0.49 0.66 349 2011 11 323.83 0.41 0.60 521 2011 12 324.01 0.42 0.65 710 2012 1 324.09 0.44 0.67 546 2012 2 324.13 0.45 0.70 561 2012 3 323.93 0.87 0.59 130 2012 4 323.84 0.69 0.71 240 2012 5 324.00 0.69 0.62 428 2012 6 324.08 0.66 0.75 327 2012 7 324.29 0.70 0.68 466 2012 8 324.55 0.72 0.64 527 2012 9 324.78 0.68 0.68 528 2012 10 324.93 0.45 0.67 686 2012 11 324.97 0.44 0.64 651 2012 12 324.97 0.42 0.61 683 2013 1 325.00 0.45 0.65 667 2013 2 324.96 0.49 0.62 616 2013 3 324.96 0.48 0.65 682 2013 4 324.88 0.45 0.62 647 2013 5 324.99 0.38 0.65 699 2013 6 325.13 0.50 0.66 686 2013 7 325.30 0.41 0.64 664 2013 8 325.60 0.42 0.66 726 2013 9 325.63 0.44 0.67 667 2013 10 325.70 0.43 0.60 656 2013 11 325.73 0.49 0.66 627 2013 12 325.82 0.39 0.64 663 2014 1 325.70 0.37 0.61 697 2014 2 325.75 0.51 0.59 611 2014 3 325.69 0.52 0.69 622 2014 4 325.67 0.44 0.65 625 2014 5 325.59 0.46 0.65 691 2014 6 325.86 0.50 0.70 596 2014 7 326.29 0.42 0.62 623 2014 8 326.44 0.47 0.68 678 2014 9 326.63 0.42 0.65 634 2014 10 326.71 0.47 0.72 620 2014 11 327.01 0.49 0.63 612 2014 12 327.05 0.46 0.66 643 2015 1 327.06 0.62 0.91 422 2015 2 327.06 0.58 0.78 613 2015 3 327.03 0.51 0.73 658 2015 4 327.13 0.51 0.68 639 2015 5 327.07 0.44 0.62 659 2015 6 327.19 0.39 0.57 630 2015 7 327.28 0.42 0.64 631 2015 8 327.60 0.40 0.64 603 2015 9 327.64 0.46 0.64 632 2015 10 327.84 0.65 0.90 696 2015 11 328.00 0.67 0.91 655 2015 12 327.98 0.61 0.83 632 2016 1 328.13 0.56 0.79 667 2016 2 328.08 0.72 0.83 631 2016 3 327.74 0.59 0.67 649 2016 4 327.73 0.53 0.63 537 2016 5 327.50 0.56 0.79 657 2016 6 327.76 0.60 0.74 668 2016 7 327.92 0.48 0.70 654 2016 8 328.06 0.54 0.80 687 2016 9 328.41 0.56 0.80 668 2016 10 328.65 0.78 0.88 688 2016 11 328.66 0.58 0.80 656 2016 12 328.47 0.59 0.73 581 2017 1 328.38 0.46 0.69 638 2017 2 328.32 0.58 0.87 595 2017 3 328.47 0.72 0.89 637 2017 4 328.57 0.73 0.83 654 2017 5 328.68 0.71 0.79 697 2017 6 328.95 0.77 0.83 647 2017 7 329.27 0.68 0.74 666 2017 8 329.37 0.69 0.81 629 2017 9 329.69 0.61 0.83 659 2017 10 329.84 0.56 0.71 526 2017 11 330.02 0.45 0.70 645 2017 12 330.12 0.47 0.73 562 2018 1 329.94 0.45 0.67 634 2018 2 329.97 0.47 0.63 126 2018 3 329.85 0.69 0.83 663 2018 4 329.82 0.64 0.77 639 2018 5 330.05 0.56 0.79 680 2018 6 330.16 0.58 0.79 620 2018 7 330.32 0.71 0.85 641 2018 8 330.48 0.77 0.87 664 2018 9 330.85 0.70 0.81 655 2018 10 330.80 1.11 1.06 660 2018 11 331.05 0.71 0.92 638 2018 12 331.10 0.52 0.71 633 2019 1 331.24 0.51 0.71 589 2019 2 330.92 0.68 0.89 557 2019 3 330.95 1.02 1.00 678 2019 4 330.79 0.93 1.02 570 2019 5 330.81 1.03 0.98 649 2019 6 330.92 0.84 0.96 625 2019 7 331.16 0.87 1.00 646 2019 8 331.41 0.82 1.01 651 2019 9 331.69 0.75 0.92 647 2019 10 331.68 0.98 0.91 520 2019 11 331.73 0.81 1.09 536 2019 12 331.70 0.50 0.67 602 2020 1 331.71 0.56 0.74 496 2020 2 331.67 1.83 1.54 380 2020 3 331.62 0.82 1.33 643 2020 4 331.75 0.74 1.14 621 2020 5 331.80 0.76 1.22 661 2020 6 332.01 0.68 1.09 650 2020 7 332.21 0.83 1.31 663 2020 8 332.43 0.84 1.27 640 2020 9 332.69 0.83 1.29 621 2020 10 332.92 0.67 1.17 674 2020 11 333.03 0.64 1.14 652 2020 12 333.12 0.86 1.40 626 2021 1 333.34 0.59 1.18 674 2021 2 333.49 0.59 0.97 607 2021 3 333.33 0.54 0.98 676 2021 4 333.18 0.59 1.01 653 2021 5 333.30 0.57 1.00 620 2021 6 333.49 0.50 0.88 652 2021 7 333.77 0.53 1.01 685 2021 8 333.87 0.55 1.04 676 2021 9 334.18 0.52 1.00 680 2021 10 334.26 0.49 0.96 702 2021 11 334.61 0.56 0.96 665 2021 12 334.82 0.56 0.94 629 2022 1 nan nan nan 0 2022 2 334.69 0.58 0.97 321 2022 3 334.73 0.50 0.92 712 2022 4 334.69 0.50 0.92 683 2022 5 334.74 0.56 0.95 703 2022 6 334.76 0.54 1.03 703 2022 7 334.94 0.55 1.05 718 2022 8 335.18 0.63 1.10 701 2022 9 335.35 0.85 1.50 662 2022 10 335.42 0.88 1.33 679 2022 11 335.67 0.56 0.99 683 2022 12 335.84 0.51 0.99 684 2023 1 336.02 0.54 1.00 694 2023 2 335.93 0.77 1.27 630 2023 3 335.88 0.61 1.09 684 2023 4 335.87 0.53 1.05 702 2023 5 335.66 0.58 1.00 657 2023 6 335.68 0.56 1.03 661 2023 7 335.89 0.61 1.11 699 2023 8 336.05 0.63 0.98 679 2023 9 336.25 0.50 0.94 602 2023 10 336.28 0.49 0.93 456 2023 11 336.61 0.53 0.89 688 2023 12 336.69 0.51 0.87 633 2024 1 336.74 0.48 0.84 703 2024 2 336.70 0.46 0.86 118