# file: brw_H1211_MM.dat # date: Mon, Mar 8, 2021 2:39:38 PM # # Halon-1211 (H1211) data from hourly in situ samples analyzed on a gas chromatograph located # at Pt. Barrow (BRW), Alaska (71.3 N, 156.6 W, elevation: 8 m). # # Atmospheric Measurements from the NOAA/ESRL 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. # # (PIs) Geoffrey S. Dutton, Dr. James W. Elkins, Dr. Bradley D. Hall # # National Oceanic and Atmospheric Administration (NOAA) # Earth System Research Laboratory (ESRL) # 325 Broadway, R/GML # Boulder, CO 80305-3328 # # Email: Geoff.Dutton@noaa.gov; James.W.Elkins@noaa.gov; Bradley.Hall@noaa.gov # Phone: (303) 497-6086 (303) 497-6224 (303) 497-7011 # Fax: (303) 497-6290 # # See (http://www.esrl.noaa.gov/gmd/obop/) for station statistics and personnel. # # Data use policy: # If you use this data in a publication or report, we would appreciate that you contact the principal # investigators (PIs) first and discuss your interests. We are trying to encourage scientific discussion. # The PIs can discuss the quality of the data and any potential problems with its analysis. Recent data (less # than 1.5 years) are considered preliminary. Please contact the PIs for more information. # # The data should be cited in presentations or publications as the flowing: Halon-1211 data from # the NOAA/ESRL halocarbons in situ program. # # DOI: http://doi.org/10.7289/V5X0659V # # Calibration scale used: NOAA 2006 # # More information about the calibration scale can be found at: # http://www.esrl.noaa.gov/gmd/ccl/ # # 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 # H1211catsBRWyr H1211catsBRWmon H1211catsBRWm H1211catsBRWunc H1211catsBRWsd H1211catsBRWn 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 4.04 0.03 0.05 307 1998 7 4.08 0.02 0.05 715 1998 8 4.06 0.02 0.04 683 1998 9 4.05 0.02 0.04 329 1998 10 4.05 0.02 0.05 698 1998 11 4.08 0.03 0.09 663 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 4.05 0.04 0.04 662 1999 5 4.08 0.04 0.04 488 1999 6 4.12 0.03 0.05 653 1999 7 4.15 0.03 0.05 715 1999 8 4.15 0.03 0.05 723 1999 9 4.13 0.03 0.04 681 1999 10 4.10 0.03 0.03 707 1999 11 4.15 0.03 0.04 656 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 4.13 0.03 0.08 546 2000 5 4.18 0.03 0.09 726 2000 6 4.28 0.03 0.08 571 2000 7 4.26 0.02 0.04 532 2000 8 4.25 0.02 0.04 677 2000 9 4.25 0.02 0.04 564 2000 10 4.27 0.02 0.05 283 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 4.33 0.02 0.05 526 2001 6 4.33 0.02 0.04 620 2001 7 4.31 0.02 0.03 617 2001 8 4.28 0.02 0.05 560 2001 9 4.26 0.02 0.03 630 2001 10 4.25 0.01 0.02 353 2001 11 nan nan nan 0 2001 12 nan nan nan 0 2002 1 nan nan nan 0 2002 2 nan nan nan 0 2002 3 nan nan nan 0 2002 4 4.30 0.01 0.04 180 2002 5 4.32 0.02 0.03 482 2002 6 4.32 0.02 0.03 612 2002 7 4.32 0.02 0.02 609 2002 8 4.32 0.02 0.03 540 2002 9 4.32 0.02 0.03 530 2002 10 4.32 0.02 0.03 606 2002 11 4.38 0.02 0.03 311 2002 12 nan nan nan 0 2003 1 nan nan nan 0 2003 2 nan nan nan 0 2003 3 nan nan nan 0 2003 4 nan nan nan 0 2003 5 nan nan nan 0 2003 6 4.43 0.01 0.02 471 2003 7 4.41 0.01 0.02 670 2003 8 4.40 0.01 0.02 659 2003 9 4.40 0.02 0.03 594 2003 10 4.43 0.01 0.03 676 2003 11 4.46 0.01 0.04 643 2003 12 nan nan nan 0 2004 1 nan nan nan 0 2004 2 nan nan nan 0 2004 3 nan nan nan 0 2004 4 4.44 0.01 0.03 110 2004 5 nan nan nan 0 2004 6 4.44 0.01 0.03 89 2004 7 4.43 0.01 0.02 653 2004 8 4.41 0.01 0.02 579 2004 9 4.41 0.01 0.01 643 2004 10 4.43 0.01 0.02 350 2004 11 4.46 0.01 0.04 114 2004 12 nan nan nan 0 2005 1 nan nan nan 0 2005 2 nan nan nan 0 2005 3 nan nan nan 0 2005 4 4.48 0.01 0.04 384 2005 5 4.46 0.01 0.02 697 2005 6 4.45 0.01 0.02 698 2005 7 4.44 0.01 0.02 702 2005 8 4.41 0.01 0.02 701 2005 9 4.40 0.01 0.01 685 2005 10 4.41 0.01 0.02 726 2005 11 4.47 0.01 0.03 425 2005 12 nan nan nan 0 2006 1 nan nan nan 0 2006 2 nan nan nan 0 2006 3 nan nan nan 0 2006 4 4.44 0.01 0.04 609 2006 5 4.43 0.01 0.02 721 2006 6 4.42 0.01 0.02 638 2006 7 4.39 0.01 0.02 577 2006 8 4.36 0.01 0.01 705 2006 9 4.35 0.01 0.02 685 2006 10 4.37 0.01 0.02 656 2006 11 4.41 0.01 0.03 477 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 4.38 0.01 0.03 467 2007 5 4.36 0.01 0.03 571 2007 6 4.39 0.01 0.02 588 2007 7 4.37 0.01 0.02 695 2007 8 4.36 0.02 0.03 700 2007 9 4.34 0.02 0.03 689 2007 10 4.34 0.02 0.02 700 2007 11 4.36 0.02 0.03 588 2007 12 nan nan nan 0 2008 1 nan nan nan 0 2008 2 nan nan nan 0 2008 3 nan nan nan 0 2008 4 4.35 0.01 0.03 556 2008 5 4.34 0.01 0.03 691 2008 6 4.34 0.01 0.02 704 2008 7 4.32 0.02 0.02 735 2008 8 4.30 0.02 0.02 721 2008 9 4.30 0.04 0.03 270 2008 10 4.30 0.02 0.03 601 2008 11 4.32 0.03 0.03 442 2008 12 nan nan nan 0 2009 1 nan nan nan 0 2009 2 nan nan nan 0 2009 3 nan nan nan 0 2009 4 4.27 0.01 0.03 411 2009 5 4.25 0.02 0.03 663 2009 6 4.24 0.01 0.03 670 2009 7 4.23 0.02 0.02 741 2009 8 4.22 0.02 0.03 663 2009 9 4.17 0.02 0.02 483 2009 10 4.18 0.01 0.03 744 2009 11 4.19 0.01 0.03 693 2009 12 nan nan nan 0 2010 1 nan nan nan 0 2010 2 nan nan nan 0 2010 3 nan nan nan 0 2010 4 4.18 0.02 0.04 325 2010 5 4.17 0.02 0.03 583 2010 6 4.17 0.02 0.03 682 2010 7 4.16 0.02 0.04 637 2010 8 4.15 0.02 0.03 741 2010 9 4.16 0.03 0.02 578 2010 10 4.15 0.02 0.03 555 2010 11 4.18 0.02 0.03 559 2010 12 nan nan nan 0 2011 1 nan nan nan 0 2011 2 nan nan nan 0 2011 3 nan nan nan 0 2011 4 4.16 0.02 0.04 399 2011 5 4.15 0.02 0.04 558 2011 6 4.13 0.03 0.04 704 2011 7 4.10 0.03 0.04 720 2011 8 4.08 0.03 0.04 733 2011 9 4.09 0.02 0.03 698 2011 10 4.10 0.02 0.02 735 2011 11 4.12 0.03 0.03 346 2011 12 nan nan nan 0 2012 1 nan nan nan 0 2012 2 nan nan nan 0 2012 3 nan nan nan 0 2012 4 4.09 0.02 0.05 570 2012 5 4.07 0.04 0.06 649 2012 6 4.04 0.04 0.06 641 2012 7 4.04 0.04 0.02 69 2012 8 4.01 0.06 0.06 108 2012 9 4.00 0.06 0.04 566 2012 10 4.01 0.04 0.03 613 2012 11 4.04 0.03 0.04 207 2012 12 nan nan nan 0 2013 1 nan nan nan 0 2013 2 nan nan nan 0 2013 3 nan nan nan 0 2013 4 3.99 0.04 0.05 711 2013 5 3.98 0.03 0.04 694 2013 6 3.95 0.02 0.02 709 2013 7 3.93 0.02 0.02 728 2013 8 3.91 0.02 0.02 706 2013 9 3.89 0.02 0.02 720 2013 10 3.91 0.02 0.03 740 2013 11 3.96 0.02 0.03 714 2013 12 nan nan nan 0 2014 1 nan nan nan 0 2014 2 nan nan nan 0 2014 3 nan nan nan 0 2014 4 3.84 0.02 0.03 703 2014 5 3.86 0.02 0.03 730 2014 6 3.83 0.01 0.02 691 2014 7 3.81 0.01 0.02 734 2014 8 3.79 0.01 0.02 741 2014 9 3.79 0.01 0.02 713 2014 10 3.79 0.01 0.02 719 2014 11 3.79 0.01 0.04 487 2014 12 nan nan nan 0 2015 1 nan nan nan 0 2015 2 nan nan nan 0 2015 3 nan nan nan 0 2015 4 3.76 0.01 0.02 706 2015 5 3.74 0.01 0.02 739 2015 6 3.73 0.01 0.02 697 2015 7 3.71 0.01 0.02 738 2015 8 3.69 0.01 0.02 745 2015 9 3.69 0.01 0.02 717 2015 10 3.69 0.01 0.01 722 2015 11 3.71 0.01 0.02 554 2015 12 nan nan nan 0 2016 1 nan nan nan 0 2016 2 nan nan nan 0 2016 3 nan nan nan 0 2016 4 3.63 0.01 0.02 717 2016 5 3.61 0.01 0.02 745 2016 6 3.61 0.01 0.01 718 2016 7 3.60 0.01 0.02 736 2016 8 3.59 0.01 0.02 736 2016 9 3.57 0.01 0.01 718 2016 10 3.57 0.01 0.02 730 2016 11 3.58 0.01 0.01 716 2016 12 nan nan nan 0 2017 1 nan nan nan 0 2017 2 nan nan nan 0 2017 3 nan nan nan 0 2017 4 3.54 0.01 0.02 710 2017 5 3.53 0.01 0.01 742 2017 6 3.52 0.01 0.01 631 2017 7 3.52 0.01 0.01 720 2017 8 3.51 0.01 0.01 710 2017 9 3.51 0.01 0.01 696 2017 10 3.51 0.01 0.01 737 2017 11 3.51 0.01 0.01 709 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 3.44 0.01 0.02 718 2018 5 3.42 0.01 0.01 738 2018 6 3.40 0.01 0.02 711 2018 7 3.37 0.01 0.02 734 2018 8 3.36 0.01 0.01 679 2018 9 3.36 0.01 0.01 713 2018 10 3.36 0.01 0.02 669 2018 11 3.40 0.01 0.02 687 2018 12 nan nan nan 0 2019 1 nan nan nan 0 2019 2 nan nan nan 0 2019 3 nan nan nan 0 2019 4 3.35 0.02 0.02 679 2019 5 3.33 0.01 0.02 696 2019 6 3.31 0.02 0.02 527 2019 7 3.30 0.03 0.02 517 2019 8 3.28 0.01 0.02 701 2019 9 3.27 0.01 0.02 607 2019 10 3.27 0.01 0.02 729 2019 11 3.30 0.02 0.03 697 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 3.22 0.01 0.03 352 2020 5 3.19 0.01 0.02 740 2020 6 3.18 0.01 0.02 718 2020 7 3.16 0.02 0.02 694 2020 8 3.15 0.02 0.02 723 2020 9 3.14 0.02 0.02 689 2020 10 3.15 0.02 0.02 485 2020 11 3.17 0.02 0.02 478 2020 12 nan nan nan 0 2021 1 nan nan nan 0 2021 2 nan nan nan 0 2021 3 nan nan nan 0