# file: spo_H1211_MM.dat # date: 2024-02-09 # # Halon-1211 (H1211) 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 Halon-1211 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 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 # H1211catsSPOyr H1211catsSPOmon H1211catsSPOm H1211catsSPOunc H1211catsSPOsd H1211catsSPOn 1998 1 nan nan nan 0 1998 2 3.57 0.00 0.01 193 1998 3 3.59 0.00 0.02 520 1998 4 3.60 0.00 0.02 401 1998 5 3.64 0.00 0.03 427 1998 6 3.66 0.00 0.02 490 1998 7 3.68 0.00 0.01 360 1998 8 3.70 0.00 0.01 280 1998 9 3.72 0.00 0.01 570 1998 10 3.74 0.01 0.02 136 1998 11 3.75 0.00 0.01 217 1998 12 3.75 0.00 0.01 232 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 3.81 0.00 0.02 311 1999 7 3.80 0.01 0.04 614 1999 8 3.83 0.01 0.04 383 1999 9 3.83 0.01 0.06 312 1999 10 3.82 0.01 0.05 509 1999 11 3.83 0.00 0.03 506 1999 12 3.83 0.01 0.03 526 2000 1 nan nan nan 0 2000 2 3.87 0.03 0.04 466 2000 3 3.88 0.03 0.03 564 2000 4 3.95 0.02 0.05 641 2000 5 3.96 0.02 0.04 621 2000 6 3.98 0.02 0.04 509 2000 7 3.99 0.02 0.04 404 2000 8 4.03 0.02 0.04 555 2000 9 nan nan nan 0 2000 10 4.03 0.03 0.04 107 2000 11 4.03 0.03 0.04 216 2000 12 4.03 0.05 0.05 405 2001 1 4.02 0.05 0.04 391 2001 2 4.01 0.06 0.05 268 2001 3 4.05 0.10 0.06 188 2001 4 4.03 0.09 0.07 411 2001 5 4.01 0.08 0.08 426 2001 6 4.05 0.05 0.07 427 2001 7 4.06 0.07 0.08 374 2001 8 4.07 0.07 0.07 393 2001 9 4.12 0.04 0.07 475 2001 10 4.09 0.06 0.09 419 2001 11 4.06 0.10 0.11 402 2001 12 4.05 0.09 0.11 399 2002 1 4.08 0.13 0.11 188 2002 2 4.07 0.03 0.06 360 2002 3 4.06 0.03 0.05 603 2002 4 4.07 0.03 0.05 509 2002 5 4.07 0.03 0.05 533 2002 6 4.09 0.03 0.05 540 2002 7 4.05 0.03 0.05 437 2002 8 4.12 0.03 0.06 571 2002 9 4.15 0.02 0.04 398 2002 10 4.17 0.02 0.04 409 2002 11 4.15 0.03 0.05 146 2002 12 4.14 0.02 0.04 639 2003 1 4.13 0.02 0.04 572 2003 2 4.12 0.02 0.04 563 2003 3 4.13 0.03 0.05 676 2003 4 4.14 0.03 0.05 582 2003 5 4.14 0.03 0.05 654 2003 6 4.15 0.03 0.05 661 2003 7 4.17 0.03 0.05 640 2003 8 4.18 0.03 0.06 684 2003 9 4.19 0.03 0.06 653 2003 10 4.20 0.04 0.07 615 2003 11 4.19 0.03 0.05 517 2003 12 4.14 0.03 0.06 492 2004 1 4.16 0.03 0.05 483 2004 2 4.16 0.02 0.04 614 2004 3 4.17 0.02 0.04 650 2004 4 4.17 0.02 0.04 650 2004 5 4.18 0.02 0.04 673 2004 6 4.19 0.02 0.04 627 2004 7 4.21 0.02 0.04 664 2004 8 4.21 0.03 0.05 655 2004 9 4.22 0.03 0.04 656 2004 10 4.22 0.02 0.05 705 2004 11 4.22 0.03 0.05 628 2004 12 4.22 0.03 0.05 622 2005 1 4.21 0.03 0.04 533 2005 2 4.19 0.02 0.04 566 2005 3 4.21 0.04 0.06 312 2005 4 4.21 0.03 0.05 512 2005 5 4.20 0.02 0.03 499 2005 6 4.22 0.04 0.05 438 2005 7 4.22 0.02 0.04 707 2005 8 4.23 0.02 0.04 676 2005 9 4.21 0.02 0.04 660 2005 10 4.21 0.02 0.04 700 2005 11 4.20 0.02 0.03 664 2005 12 4.20 0.03 0.05 588 2006 1 4.18 0.05 0.05 578 2006 2 4.18 0.03 0.05 651 2006 3 4.17 0.03 0.05 721 2006 4 4.17 0.03 0.05 687 2006 5 4.18 0.03 0.05 675 2006 6 4.18 0.03 0.05 686 2006 7 4.17 0.01 0.02 709 2006 8 4.17 0.01 0.02 694 2006 9 4.18 0.01 0.02 680 2006 10 4.18 0.01 0.02 725 2006 11 4.18 0.01 0.02 669 2006 12 4.17 0.01 0.02 644 2007 1 4.16 0.01 0.02 612 2007 2 4.14 0.01 0.02 592 2007 3 4.13 0.01 0.02 649 2007 4 4.13 0.01 0.02 678 2007 5 4.12 0.01 0.02 702 2007 6 4.12 0.01 0.02 686 2007 7 4.13 0.01 0.02 713 2007 8 4.13 0.01 0.01 685 2007 9 4.14 0.01 0.01 666 2007 10 4.14 0.01 0.01 714 2007 11 4.14 0.01 0.01 700 2007 12 4.13 0.01 0.01 694 2008 1 4.09 0.01 0.02 640 2008 2 4.07 0.01 0.02 657 2008 3 4.06 0.01 0.02 710 2008 4 4.05 0.01 0.02 670 2008 5 4.05 0.01 0.02 712 2008 6 4.06 0.01 0.02 697 2008 7 4.07 0.01 0.02 709 2008 8 4.08 0.01 0.02 648 2008 9 4.08 0.01 0.02 689 2008 10 4.08 0.01 0.02 714 2008 11 4.08 0.01 0.02 691 2008 12 4.07 0.01 0.02 702 2009 1 4.07 0.01 0.02 578 2009 2 4.06 0.01 0.03 666 2009 3 4.03 0.01 0.03 711 2009 4 4.02 0.01 0.03 692 2009 5 4.02 0.01 0.03 735 2009 6 4.02 0.01 0.03 699 2009 7 4.03 0.01 0.02 726 2009 8 4.03 0.01 0.01 698 2009 9 4.04 0.01 0.01 709 2009 10 4.04 0.01 0.01 694 2009 11 4.03 0.01 0.01 698 2009 12 4.02 0.01 0.01 715 2010 1 4.00 0.01 0.02 712 2010 2 3.99 0.01 0.02 630 2010 3 3.98 0.01 0.02 696 2010 4 3.98 0.01 0.02 682 2010 5 3.98 0.01 0.02 699 2010 6 3.99 0.01 0.02 681 2010 7 3.99 0.01 0.02 689 2010 8 3.99 0.01 0.02 705 2010 9 4.00 0.01 0.02 684 2010 10 4.00 0.01 0.02 654 2010 11 3.99 0.01 0.03 666 2010 12 3.98 0.01 0.03 642 2011 1 3.96 0.01 0.03 729 2011 2 3.94 0.01 0.03 642 2011 3 3.93 0.01 0.03 716 2011 4 3.93 0.01 0.03 697 2011 5 3.94 0.01 0.03 698 2011 6 3.94 0.01 0.03 698 2011 7 3.94 0.01 0.03 707 2011 8 3.93 0.01 0.03 406 2011 9 3.93 0.01 0.02 365 2011 10 3.92 0.01 0.03 354 2011 11 3.91 0.01 0.03 530 2011 12 3.91 0.01 0.03 717 2012 1 3.90 0.01 0.03 566 2012 2 3.87 0.01 0.03 579 2012 3 3.86 0.01 0.02 218 2012 4 3.86 0.01 0.02 404 2012 5 3.86 0.01 0.02 544 2012 6 3.84 0.01 0.02 344 2012 7 3.81 0.01 0.03 324 2012 8 3.80 0.01 0.02 551 2012 9 3.81 0.01 0.02 557 2012 10 3.81 0.01 0.02 687 2012 11 3.78 0.01 0.03 680 2012 12 3.76 0.01 0.02 703 2013 1 3.74 0.01 0.02 684 2013 2 3.73 0.01 0.02 636 2013 3 3.72 0.01 0.02 712 2013 4 3.71 0.01 0.02 677 2013 5 3.70 0.01 0.02 713 2013 6 3.70 0.01 0.02 695 2013 7 3.71 0.01 0.02 675 2013 8 3.72 0.01 0.02 718 2013 9 3.71 0.01 0.02 689 2013 10 3.69 0.01 0.02 703 2013 11 3.68 0.01 0.02 651 2013 12 3.67 0.01 0.02 686 2014 1 3.65 0.01 0.02 697 2014 2 3.64 0.01 0.02 640 2014 3 3.63 0.01 0.02 712 2014 4 3.63 0.01 0.02 676 2014 5 3.62 0.01 0.02 721 2014 6 3.62 0.01 0.02 630 2014 7 3.63 0.01 0.03 556 2014 8 3.62 0.01 0.02 721 2014 9 3.60 0.01 0.02 689 2014 10 3.61 0.01 0.03 669 2014 11 3.59 0.01 0.03 652 2014 12 3.57 0.01 0.03 681 2015 1 3.57 0.01 0.03 450 2015 2 3.56 0.01 0.02 636 2015 3 3.55 0.01 0.02 681 2015 4 3.55 0.01 0.02 652 2015 5 3.55 0.01 0.02 670 2015 6 3.54 0.01 0.02 640 2015 7 3.55 0.01 0.02 659 2015 8 3.55 0.01 0.02 636 2015 9 3.54 0.01 0.03 641 2015 10 3.52 0.01 0.03 704 2015 11 3.51 0.01 0.02 668 2015 12 3.50 0.01 0.03 665 2016 1 3.49 0.01 0.02 698 2016 2 3.45 0.01 0.03 674 2016 3 3.44 0.01 0.02 669 2016 4 3.43 0.01 0.03 571 2016 5 3.43 0.01 0.03 686 2016 6 3.43 0.01 0.02 687 2016 7 3.43 0.01 0.02 689 2016 8 3.45 0.01 0.03 714 2016 9 3.48 0.01 0.03 302 2016 10 nan nan nan 0 2016 11 nan nan nan 0 2016 12 3.45 0.01 0.02 367 2017 1 3.42 0.01 0.03 683 2017 2 3.38 0.01 0.03 630 2017 3 3.40 0.01 0.03 667 2017 4 3.39 0.01 0.03 685 2017 5 3.39 0.01 0.02 731 2017 6 3.39 0.01 0.02 670 2017 7 3.39 0.01 0.02 704 2017 8 3.39 0.01 0.02 664 2017 9 3.39 0.01 0.02 676 2017 10 3.38 0.01 0.02 533 2017 11 3.38 0.01 0.02 669 2017 12 3.34 0.01 0.03 576 2018 1 3.32 0.01 0.04 677 2018 2 3.29 0.01 0.03 135 2018 3 3.26 0.01 0.05 685 2018 4 3.28 0.01 0.05 653 2018 5 3.27 0.01 0.05 692 2018 6 3.30 0.01 0.06 624 2018 7 3.32 0.02 0.05 653 2018 8 3.30 0.01 0.05 680 2018 9 3.30 0.01 0.04 686 2018 10 3.29 0.01 0.04 680 2018 11 3.28 0.01 0.05 606 2018 12 3.28 0.01 0.05 681 2019 1 3.25 0.01 0.03 657 2019 2 3.23 0.01 0.04 254 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 nan nan nan 0 2019 8 nan nan nan 0 2019 9 3.18 0.01 0.06 608 2019 10 3.18 0.01 0.04 727 2019 11 3.16 0.01 0.05 676 2019 12 3.16 0.02 0.05 675 2020 1 3.16 0.02 0.04 603 2020 2 3.14 0.02 0.04 614 2020 3 3.11 0.01 0.03 666 2020 4 3.09 0.02 0.04 716 2020 5 3.09 0.02 0.04 718 2020 6 3.09 0.02 0.04 703 2020 7 3.08 0.02 0.04 728 2020 8 3.07 0.02 0.04 697 2020 9 3.08 0.02 0.05 661 2020 10 3.08 0.02 0.04 623 2020 11 3.08 0.02 0.04 670 2020 12 3.08 0.02 0.04 673 2021 1 3.06 0.02 0.04 710 2021 2 3.03 0.01 0.05 616 2021 3 3.01 0.01 0.05 687 2021 4 2.99 0.02 0.06 580 2021 5 2.96 0.02 0.06 610 2021 6 2.95 0.02 0.06 672 2021 7 2.96 0.02 0.05 717 2021 8 2.95 0.02 0.06 710 2021 9 2.97 0.01 0.06 702 2021 10 2.96 0.01 0.05 727 2021 11 2.95 0.02 0.06 689 2021 12 2.95 0.01 0.05 657 2022 1 nan nan nan 0 2022 2 2.94 0.01 0.05 619 2022 3 2.90 0.01 0.06 730 2022 4 2.89 0.01 0.06 695 2022 5 2.89 0.01 0.06 715 2022 6 2.85 0.01 0.06 711 2022 7 2.84 0.01 0.05 734 2022 8 2.85 0.01 0.05 706 2022 9 2.82 0.01 0.06 698 2022 10 2.85 0.02 0.07 726 2022 11 2.89 0.01 0.05 702 2022 12 2.89 0.01 0.06 508 2023 1 2.83 0.01 0.05 721 2023 2 2.78 0.01 0.04 642 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 2.71 0.02 0.06 704 2023 8 2.72 0.02 0.06 234 2023 9 nan nan nan 0 2023 10 nan nan nan 0 2023 11 2.63 0.00 0.01 676 2023 12 2.63 0.00 0.01 653 2024 1 2.62 0.00 0.01 717 2024 2 2.61 0.00 0.01 120