# file: nwr_H1211_MM.dat # date: 2023-08-29 # # Halon-1211 (H1211) data from hourly in situ samples analyzed on a gas chromatograph located # at Niwot Ridge (NWR), Colorado (C-1 site: 40.04 N, 105.54 W, elevation: 3018 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 # H1211catsNWRyr H1211catsNWRmon H1211catsNWRm H1211catsNWRunc H1211catsNWRsd H1211catsNWRn 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 nan nan nan 0 1999 8 nan nan nan 0 1999 9 nan nan nan 0 1999 10 nan nan nan 0 1999 11 nan nan nan 0 1999 12 nan nan nan 0 2000 1 nan nan nan 0 2000 2 nan nan nan 0 2000 3 nan nan nan 0 2000 4 nan nan nan 0 2000 5 nan nan nan 0 2000 6 nan nan nan 0 2000 7 nan nan nan 0 2000 8 nan nan nan 0 2000 9 nan nan nan 0 2000 10 nan nan nan 0 2000 11 nan nan nan 0 2000 12 nan nan nan 0 2001 1 nan nan nan 0 2001 2 nan nan nan 0 2001 3 nan nan nan 0 2001 4 nan nan nan 0 2001 5 4.20 0.03 0.24 704 2001 6 4.18 0.04 0.21 571 2001 7 4.21 0.06 0.18 675 2001 8 4.23 0.06 0.18 638 2001 9 4.30 0.04 0.13 704 2001 10 4.28 0.07 0.14 734 2001 11 4.37 0.06 0.32 715 2001 12 4.39 0.07 0.48 641 2002 1 4.42 0.08 0.66 541 2002 2 4.55 0.13 0.44 573 2002 3 4.44 0.09 0.52 669 2002 4 4.44 0.08 0.30 710 2002 5 4.44 0.07 0.23 714 2002 6 4.49 0.06 0.22 692 2002 7 4.47 0.06 0.19 700 2002 8 4.44 0.06 0.20 729 2002 9 4.42 0.06 0.20 705 2002 10 4.45 0.07 0.29 715 2002 11 4.31 0.06 0.23 690 2002 12 4.35 0.06 0.43 723 2003 1 4.30 0.05 0.24 648 2003 2 4.37 0.05 0.44 595 2003 3 4.36 0.05 0.18 689 2003 4 4.43 0.05 0.16 692 2003 5 4.44 0.05 0.17 649 2003 6 4.48 0.04 0.14 585 2003 7 4.41 0.04 0.13 679 2003 8 4.37 0.05 0.18 737 2003 9 4.37 0.07 0.18 676 2003 10 4.39 0.09 0.26 710 2003 11 4.34 0.09 0.24 707 2003 12 4.33 0.09 0.26 734 2004 1 4.37 0.09 0.25 698 2004 2 4.41 0.10 0.32 673 2004 3 4.41 0.09 0.25 689 2004 4 4.44 0.07 0.18 712 2004 5 4.41 0.06 0.21 677 2004 6 4.47 0.09 0.22 219 2004 7 4.42 0.03 0.08 286 2004 8 4.41 0.03 0.08 728 2004 9 4.41 0.04 0.15 664 2004 10 4.42 0.04 0.10 575 2004 11 4.45 0.02 0.11 720 2004 12 4.44 0.03 0.07 723 2005 1 4.42 0.03 0.08 658 2005 2 4.45 0.04 0.07 662 2005 3 4.46 0.03 0.08 684 2005 4 4.48 0.03 0.09 703 2005 5 4.46 0.03 0.08 673 2005 6 4.46 0.03 0.08 160 2005 7 4.41 0.03 0.06 596 2005 8 4.40 0.02 0.06 735 2005 9 4.40 0.04 0.10 556 2005 10 4.41 0.09 0.15 488 2005 11 4.41 0.09 0.12 558 2005 12 4.44 0.07 0.11 651 2006 1 4.42 0.03 0.07 672 2006 2 4.41 0.03 0.05 622 2006 3 4.40 0.06 0.11 659 2006 4 4.40 0.05 0.07 638 2006 5 4.42 0.04 0.07 594 2006 6 4.39 0.04 0.07 687 2006 7 4.40 0.04 0.15 146 2006 8 nan nan nan 0 2006 9 nan nan nan 0 2006 10 nan nan nan 0 2006 11 nan nan nan 0 2006 12 nan nan nan 0 2007 1 nan nan nan 0 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 nan nan nan 0 2007 7 nan nan nan 0 2007 8 nan nan nan 0 2007 9 nan nan nan 0 2007 10 nan nan nan 0 2007 11 4.34 0.02 0.03 426 2007 12 4.35 0.03 0.05 498 2008 1 4.35 0.02 0.04 702 2008 2 4.34 0.02 0.04 681 2008 3 4.34 0.02 0.04 712 2008 4 4.35 0.01 0.04 706 2008 5 4.34 0.01 0.10 720 2008 6 4.33 0.01 0.03 714 2008 7 4.31 0.01 0.10 743 2008 8 4.30 0.01 0.15 680 2008 9 4.30 0.01 0.28 703 2008 10 4.30 0.02 0.06 728 2008 11 4.30 0.02 0.04 634 2008 12 4.30 0.02 0.04 702 2009 1 4.27 0.03 0.04 711 2009 2 4.27 0.03 0.06 609 2009 3 4.27 0.02 0.05 678 2009 4 4.26 0.02 0.04 635 2009 5 4.25 0.02 0.05 705 2009 6 4.23 0.02 0.09 692 2009 7 4.22 0.02 0.04 741 2009 8 4.22 0.01 0.06 735 2009 9 4.22 0.01 0.09 666 2009 10 4.22 0.01 0.02 640 2009 11 4.21 0.01 0.03 712 2009 12 4.22 0.02 0.03 652 2010 1 4.22 0.01 0.22 661 2010 2 4.23 0.01 0.03 398 2010 3 4.21 0.01 0.03 677 2010 4 4.20 0.01 0.05 712 2010 5 4.20 0.01 0.07 724 2010 6 4.17 0.01 0.08 717 2010 7 4.15 0.01 0.08 714 2010 8 4.12 0.01 0.07 734 2010 9 4.13 0.01 0.06 704 2010 10 4.14 0.01 0.03 730 2010 11 4.14 0.01 0.02 712 2010 12 4.14 0.01 0.03 695 2011 1 4.14 0.02 0.02 717 2011 2 4.13 0.02 0.02 665 2011 3 4.13 0.01 0.03 575 2011 4 4.14 0.01 0.23 708 2011 5 4.13 0.01 0.02 734 2011 6 4.11 0.01 0.04 573 2011 7 4.08 0.01 0.04 732 2011 8 4.08 0.01 0.03 727 2011 9 4.09 0.01 0.02 693 2011 10 4.08 0.01 0.03 720 2011 11 4.08 0.01 0.02 590 2011 12 4.07 0.01 0.02 634 2012 1 4.06 0.01 0.01 356 2012 2 nan nan nan 0 2012 3 4.03 0.01 0.03 311 2012 4 4.04 0.01 0.07 709 2012 5 4.04 0.01 0.05 740 2012 6 4.01 0.01 0.25 643 2012 7 3.99 0.01 0.03 603 2012 8 3.99 0.01 0.04 746 2012 9 3.98 0.01 0.17 722 2012 10 3.97 0.02 0.15 572 2012 11 3.98 0.02 0.05 261 2012 12 3.93 0.03 0.08 168 2013 1 3.93 0.02 0.04 658 2013 2 3.94 0.01 0.04 593 2013 3 3.95 0.06 0.25 514 2013 4 3.94 0.02 0.24 710 2013 5 3.92 0.01 0.06 446 2013 6 3.91 0.01 0.11 717 2013 7 3.89 0.01 0.23 639 2013 8 3.88 0.01 0.03 738 2013 9 3.86 0.02 0.06 676 2013 10 3.87 0.02 0.06 730 2013 11 3.87 0.01 0.03 705 2013 12 3.88 0.01 0.03 278 2014 1 3.85 0.01 0.04 348 2014 2 3.86 0.01 0.04 416 2014 3 3.85 0.01 0.04 351 2014 4 3.85 0.01 0.03 578 2014 5 3.83 0.01 0.03 746 2014 6 3.81 0.01 0.05 673 2014 7 3.80 0.01 0.04 741 2014 8 3.79 0.01 0.06 742 2014 9 3.78 0.01 0.04 660 2014 10 3.78 0.02 0.06 738 2014 11 3.78 0.01 0.03 721 2014 12 3.78 0.01 0.02 746 2015 1 3.76 0.01 0.05 717 2015 2 3.75 0.01 0.04 669 2015 3 3.74 0.01 0.04 746 2015 4 3.74 0.01 0.04 716 2015 5 3.73 0.01 0.09 524 2015 6 3.70 0.01 0.08 575 2015 7 3.69 0.02 0.03 28 2015 8 3.68 0.02 0.16 481 2015 9 3.67 0.02 0.05 668 2015 10 3.67 0.01 0.04 689 2015 11 3.67 0.01 0.03 405 2015 12 nan nan nan 0 2016 1 nan nan nan 0 2016 2 nan nan nan 0 2016 3 3.62 0.01 0.05 645 2016 4 3.61 0.01 0.03 352 2016 5 nan nan nan 0 2016 6 3.57 0.01 0.03 208 2016 7 nan nan nan 0 2016 8 3.54 0.01 0.02 498 2016 9 3.53 0.01 0.04 695 2016 10 3.53 0.01 0.02 734 2016 11 3.54 0.02 0.04 636 2016 12 3.53 0.01 0.03 728 2017 1 3.53 0.01 0.02 692 2017 2 3.52 0.01 0.03 560 2017 3 3.51 0.01 0.02 535 2017 4 3.51 0.01 0.03 359 2017 5 3.50 0.01 0.01 361 2017 6 3.49 0.01 0.02 358 2017 7 3.48 0.01 0.04 200 2017 8 nan nan nan 0 2017 9 nan nan nan 0 2017 10 3.44 0.01 0.02 119 2017 11 3.44 0.01 0.02 708 2017 12 3.43 0.01 0.01 695 2018 1 3.43 0.01 0.02 742 2018 2 3.42 0.01 0.03 667 2018 3 3.42 0.01 0.03 738 2018 4 3.42 0.01 0.02 719 2018 5 3.41 0.01 0.03 744 2018 6 3.38 0.01 0.05 684 2018 7 3.37 0.01 0.02 198 2018 8 3.34 0.01 0.01 29 2018 9 3.34 0.01 0.02 531 2018 10 3.35 0.02 0.02 142 2018 11 3.35 0.01 0.02 272 2018 12 3.35 0.01 0.02 132 2019 1 nan nan nan 0 2019 2 nan nan nan 0 2019 3 nan nan nan 0 2019 4 3.30 0.02 0.02 157 2019 5 3.29 0.01 0.02 379 2019 6 3.27 0.02 0.03 60 2019 7 3.25 0.01 0.02 524 2019 8 3.25 0.01 0.02 715 2019 9 3.24 0.01 0.03 498 2019 10 nan nan nan 0 2019 11 3.26 0.02 0.03 118 2019 12 nan nan nan 0 2020 1 nan nan nan 0 2020 2 nan nan nan 0 2020 3 nan nan nan 0 2020 4 nan nan nan 0 2020 5 3.15 0.04 0.05 181 2020 6 3.16 0.03 0.03 521 2020 7 3.14 0.02 0.03 301 2020 8 3.13 0.02 0.03 690 2020 9 3.14 0.02 0.03 392 2020 10 3.14 0.02 0.03 669 2020 11 3.12 0.03 0.03 663 2020 12 3.12 0.03 0.05 524 2021 1 3.14 0.06 0.07 175 2021 2 nan nan nan 0 2021 3 3.09 0.04 0.05 394 2021 4 3.10 0.02 0.05 544 2021 5 3.09 0.02 0.04 633 2021 6 3.06 0.03 0.05 614 2021 7 3.05 0.04 0.06 487 2021 8 3.04 0.04 0.07 323 2021 9 3.03 0.04 0.08 494 2021 10 3.03 0.05 0.08 730 2021 11 3.00 0.06 0.10 165 2021 12 3.03 0.01 0.02 440 2022 1 3.02 0.01 0.02 577 2022 2 3.01 0.01 0.02 656 2022 3 3.01 0.02 0.03 423 2022 4 2.99 0.02 0.03 344 2022 5 2.96 0.02 0.03 328 2022 6 2.94 0.01 0.02 350 2022 7 2.92 0.01 0.03 207 2022 8 2.90 0.01 0.03 638 2022 9 2.89 0.01 0.05 721 2022 10 2.94 0.02 0.04 694 2022 11 2.96 0.01 0.10 720 2022 12 2.95 0.01 0.03 708 2023 1 2.95 0.01 0.24 635 2023 2 2.93 0.01 0.02 382 2023 3 2.93 0.01 0.02 419 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