# file: smo_H1211_MM.dat # date: 2023-08-29 # # Halon-1211 (H1211) 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 Halon-1211 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 2006 # 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-trillion, ppt. # 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 H1211 in ppt, uncertainty (unc), std. dev. (sd), number of samples # H1211catsSMOyr H1211catsSMOmon H1211catsSMOm H1211catsSMOunc H1211catsSMOsd H1211catsSMOn 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 3.86 0.04 0.06 569 1999 4 3.88 0.04 0.07 494 1999 5 3.89 0.04 0.07 387 1999 6 3.91 0.04 0.07 564 1999 7 3.89 0.04 0.05 613 1999 8 3.90 0.02 0.05 533 1999 9 3.88 0.03 0.05 618 1999 10 3.88 0.03 0.06 617 1999 11 3.90 0.02 0.06 603 1999 12 3.93 0.03 0.06 575 2000 1 3.99 0.03 0.06 529 2000 2 3.97 0.03 0.07 583 2000 3 3.99 0.03 0.07 475 2000 4 3.98 0.03 0.06 596 2000 5 3.96 0.03 0.07 503 2000 6 3.95 0.03 0.05 410 2000 7 3.97 0.03 0.06 680 2000 8 3.99 0.04 0.06 625 2000 9 3.97 0.07 0.07 160 2000 10 4.01 0.02 0.04 64 2000 11 4.00 0.02 0.04 660 2000 12 4.03 0.02 0.05 713 2001 1 4.05 0.02 0.05 528 2001 2 4.07 0.02 0.05 443 2001 3 4.07 0.02 0.05 690 2001 4 4.07 0.02 0.04 344 2001 5 nan nan nan 0 2001 6 4.11 0.02 0.03 108 2001 7 4.08 0.02 0.04 576 2001 8 4.08 0.03 0.03 300 2001 9 4.09 0.03 0.03 359 2001 10 4.07 0.04 0.04 197 2001 11 4.11 0.03 0.04 355 2001 12 4.11 0.03 0.05 695 2002 1 4.14 0.04 0.04 662 2002 2 4.15 0.02 0.04 609 2002 3 4.15 0.03 0.04 702 2002 4 4.12 0.03 0.03 699 2002 5 4.12 0.03 0.03 390 2002 6 4.12 0.03 0.03 631 2002 7 4.15 0.03 0.04 688 2002 8 4.15 0.03 0.04 689 2002 9 4.15 0.03 0.03 656 2002 10 4.15 0.03 0.03 527 2002 11 4.15 0.03 0.03 388 2002 12 4.15 0.03 0.04 610 2003 1 4.19 0.03 0.05 400 2003 2 4.15 0.03 0.05 585 2003 3 4.20 0.03 0.03 490 2003 4 4.17 0.03 0.04 660 2003 5 4.16 0.02 0.03 131 2003 6 nan nan nan 0 2003 7 4.17 0.02 0.03 457 2003 8 4.18 0.03 0.03 698 2003 9 4.18 0.03 0.03 638 2003 10 4.18 0.03 0.03 653 2003 11 4.18 0.02 0.03 602 2003 12 4.24 0.02 0.05 705 2004 1 4.21 0.03 0.05 356 2004 2 4.23 0.03 0.04 643 2004 3 4.23 0.03 0.04 610 2004 4 4.22 0.03 0.05 678 2004 5 4.23 0.03 0.04 709 2004 6 4.22 0.03 0.03 668 2004 7 4.21 0.03 0.03 708 2004 8 4.23 0.03 0.03 681 2004 9 4.22 0.03 0.03 675 2004 10 4.22 0.03 0.03 702 2004 11 4.24 0.03 0.04 669 2004 12 4.23 0.03 0.04 699 2005 1 4.26 0.03 0.04 649 2005 2 4.23 0.03 0.05 552 2005 3 4.27 0.03 0.04 705 2005 4 4.24 0.03 0.04 677 2005 5 4.21 0.03 0.04 713 2005 6 4.23 0.03 0.03 372 2005 7 4.20 0.03 0.03 77 2005 8 4.25 0.03 0.03 143 2005 9 4.24 0.03 0.03 669 2005 10 4.24 0.03 0.03 733 2005 11 4.24 0.03 0.03 578 2005 12 4.24 0.03 0.04 707 2006 1 4.27 0.03 0.04 613 2006 2 4.30 0.03 0.04 621 2006 3 4.25 0.03 0.04 637 2006 4 4.24 0.03 0.03 358 2006 5 4.24 0.02 0.04 574 2006 6 4.24 0.03 0.03 667 2006 7 4.24 0.03 0.03 595 2006 8 4.25 0.03 0.03 694 2006 9 4.25 0.03 0.03 654 2006 10 4.24 0.03 0.03 611 2006 11 4.24 0.03 0.03 557 2006 12 4.24 0.03 0.03 703 2007 1 4.22 0.03 0.04 633 2007 2 4.27 0.03 0.03 575 2007 3 4.26 0.03 0.03 708 2007 4 4.24 0.03 0.03 694 2007 5 4.23 0.03 0.03 621 2007 6 4.22 0.03 0.03 660 2007 7 4.22 0.03 0.03 735 2007 8 4.23 0.03 0.03 700 2007 9 4.23 0.03 0.03 666 2007 10 4.22 0.03 0.03 642 2007 11 4.23 0.03 0.03 660 2007 12 4.21 0.03 0.03 695 2008 1 4.25 0.03 0.04 680 2008 2 4.21 0.02 0.03 638 2008 3 4.20 0.03 0.03 689 2008 4 4.19 0.02 0.03 689 2008 5 4.20 0.02 0.03 689 2008 6 4.20 0.03 0.03 664 2008 7 4.19 0.02 0.03 710 2008 8 4.19 0.02 0.03 690 2008 9 4.18 0.03 0.03 669 2008 10 4.17 0.03 0.02 672 2008 11 4.18 0.03 0.03 645 2008 12 4.19 0.02 0.03 708 2009 1 4.19 0.02 0.03 638 2009 2 4.18 0.02 0.03 627 2009 3 4.18 0.03 0.03 635 2009 4 4.17 0.03 0.03 612 2009 5 4.16 0.02 0.03 658 2009 6 4.14 0.03 0.03 508 2009 7 4.13 0.03 0.02 518 2009 8 4.14 0.03 0.03 665 2009 9 4.14 0.04 0.03 570 2009 10 4.12 0.05 0.03 484 2009 11 4.12 0.03 0.04 691 2009 12 4.11 0.03 0.03 685 2010 1 4.11 0.03 0.04 644 2010 2 4.09 0.03 0.04 538 2010 3 4.09 0.03 0.03 660 2010 4 4.09 0.03 0.03 199 2010 5 nan nan nan 0 2010 6 4.06 0.04 0.02 99 2010 7 4.07 0.04 0.03 560 2010 8 4.08 0.03 0.03 598 2010 9 4.06 0.03 0.03 691 2010 10 4.07 0.03 0.04 619 2010 11 4.06 0.03 0.04 537 2010 12 4.05 0.03 0.03 186 2011 1 4.05 0.04 0.04 611 2011 2 4.03 0.03 0.03 624 2011 3 4.01 0.04 0.04 726 2011 4 4.00 0.03 0.03 654 2011 5 4.00 0.04 0.04 680 2011 6 3.99 0.03 0.03 700 2011 7 3.99 0.04 0.04 675 2011 8 3.99 0.04 0.05 706 2011 9 3.99 0.05 0.05 683 2011 10 3.98 0.05 0.05 654 2011 11 3.98 0.04 0.05 706 2011 12 3.96 0.05 0.06 738 2012 1 3.96 0.05 0.06 727 2012 2 3.96 0.06 0.06 655 2012 3 3.95 0.07 0.07 522 2012 4 3.93 0.04 0.05 367 2012 5 3.93 0.04 0.04 67 2012 6 3.92 0.05 0.05 495 2012 7 3.92 0.04 0.05 694 2012 8 3.91 0.04 0.05 733 2012 9 3.92 0.07 0.06 539 2012 10 3.89 0.09 0.04 320 2012 11 3.88 0.04 0.04 642 2012 12 3.88 0.04 0.04 467 2013 1 3.88 0.04 0.04 537 2013 2 3.87 0.04 0.04 593 2013 3 3.87 0.03 0.04 125 2013 4 nan nan nan 0 2013 5 3.86 0.04 0.04 519 2013 6 3.86 0.05 0.04 624 2013 7 3.85 0.04 0.03 558 2013 8 3.85 0.03 0.04 663 2013 9 3.84 0.03 0.04 693 2013 10 3.82 0.03 0.04 721 2013 11 3.81 0.03 0.03 693 2013 12 3.80 0.03 0.04 717 2014 1 3.78 0.03 0.04 693 2014 2 3.79 0.02 0.04 574 2014 3 3.76 0.03 0.04 210 2014 4 3.74 0.03 0.03 340 2014 5 3.73 0.03 0.03 355 2014 6 3.74 0.03 0.04 362 2014 7 3.73 0.02 0.03 622 2014 8 3.72 0.02 0.03 619 2014 9 3.72 0.02 0.03 546 2014 10 3.72 0.03 0.03 667 2014 11 3.71 0.03 0.02 658 2014 12 3.69 0.03 0.03 605 2015 1 3.69 0.03 0.03 579 2015 2 3.68 0.03 0.03 560 2015 3 3.67 0.03 0.03 690 2015 4 3.66 0.02 0.03 674 2015 5 3.64 0.02 0.03 575 2015 6 3.65 0.02 0.03 138 2015 7 3.64 0.03 0.03 639 2015 8 3.63 0.03 0.03 712 2015 9 3.63 0.03 0.03 652 2015 10 3.61 0.03 0.03 659 2015 11 3.59 0.03 0.03 677 2015 12 3.58 0.03 0.02 607 2016 1 3.57 0.02 0.02 709 2016 2 3.56 0.02 0.03 685 2016 3 3.55 0.03 0.03 480 2016 4 3.54 0.02 0.03 629 2016 5 3.53 0.02 0.03 664 2016 6 3.52 0.02 0.03 668 2016 7 3.52 0.02 0.03 212 2016 8 nan nan nan 0 2016 9 3.49 0.02 0.03 620 2016 10 3.48 0.02 0.02 543 2016 11 3.47 0.02 0.02 629 2016 12 3.46 0.02 0.03 704 2017 1 3.45 0.02 0.03 661 2017 2 3.46 0.02 0.03 627 2017 3 3.43 0.02 0.03 670 2017 4 3.42 0.02 0.03 644 2017 5 3.41 0.02 0.03 722 2017 6 3.41 0.03 0.03 105 2017 7 3.41 0.02 0.02 59 2017 8 3.40 0.02 0.02 648 2017 9 3.39 0.02 0.02 700 2017 10 3.38 0.02 0.02 706 2017 11 3.38 0.02 0.02 382 2017 12 nan nan nan 0 2018 1 nan nan nan 0 2018 2 3.34 0.02 0.03 340 2018 3 3.34 0.04 0.04 694 2018 4 3.33 0.03 0.03 696 2018 5 3.32 0.03 0.03 728 2018 6 3.31 0.03 0.03 687 2018 7 3.31 0.03 0.03 723 2018 8 3.30 0.03 0.02 565 2018 9 3.29 0.03 0.02 650 2018 10 3.29 0.03 0.02 457 2018 11 3.28 0.03 0.02 693 2018 12 3.27 0.04 0.02 492 2019 1 3.25 0.04 0.02 294 2019 2 3.23 0.02 0.02 305 2019 3 3.22 0.05 0.04 518 2019 4 3.20 0.02 0.02 257 2019 5 3.19 0.03 0.02 533 2019 6 3.19 0.02 0.02 653 2019 7 3.18 0.02 0.02 610 2019 8 3.18 0.02 0.02 533 2019 9 3.18 0.02 0.02 347 2019 10 3.17 0.02 0.02 729 2019 11 3.16 0.02 0.02 609 2019 12 3.15 0.02 0.02 489 2020 1 3.13 0.02 0.02 578 2020 2 3.13 0.02 0.02 488 2020 3 3.12 0.02 0.02 732 2020 4 3.11 0.02 0.02 482 2020 5 3.10 0.02 0.02 700 2020 6 3.09 0.02 0.02 668 2020 7 3.09 0.03 0.02 711 2020 8 3.09 0.02 0.03 667 2020 9 3.10 0.04 0.04 682 2020 10 3.08 0.03 0.04 369 2020 11 3.04 0.03 0.04 50 2020 12 nan nan nan 0 2021 1 nan nan nan 0 2021 2 nan nan nan 0 2021 3 nan nan nan 0 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 2.91 0.02 0.05 552 2022 5 2.87 0.02 0.05 720 2022 6 2.86 0.02 0.04 470 2022 7 nan nan nan 0 2022 8 nan nan nan 0 2022 9 nan nan nan 0 2022 10 nan nan nan 0 2022 11 nan nan nan 0 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