# file: brw_F11_MM.dat # date: 2024-02-09 # # Chlorofluorocarbon-11 (F11) 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/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 Chlorofluorocarbon-11 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 2016 # 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 F11 in ppt, uncertainty (unc), std. dev. (sd), number of samples # F11catsBRWyr F11catsBRWmon F11catsBRWm F11catsBRWunc F11catsBRWsd F11catsBRWn 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 6 263.30 2.67 0.72 224 1998 7 262.71 1.16 0.67 662 1998 8 262.21 0.96 0.60 591 1998 9 261.92 0.70 0.45 298 1998 10 262.15 0.91 0.64 635 1998 11 262.73 0.67 0.62 333 1998 12 261.98 0.96 0.93 625 1999 1 262.35 0.80 0.83 643 1999 2 261.89 0.58 0.72 573 1999 3 261.61 0.54 0.77 681 1999 4 261.49 0.46 0.65 634 1999 5 261.31 0.47 0.45 453 1999 6 260.73 0.39 0.61 596 1999 7 260.21 0.48 1.09 639 1999 8 259.94 0.68 0.68 653 1999 9 259.88 0.48 0.43 649 1999 10 260.45 0.39 0.52 690 1999 11 261.00 0.74 0.73 628 1999 12 261.55 0.79 0.81 712 2000 1 261.76 0.66 0.64 655 2000 2 261.74 0.70 0.72 638 2000 3 261.25 0.78 0.77 605 2000 4 261.02 0.65 0.88 448 2000 5 260.95 0.38 0.57 700 2000 6 261.12 0.69 0.86 420 2000 7 260.68 0.72 0.71 478 2000 8 260.20 0.57 0.46 601 2000 9 259.92 0.41 0.43 487 2000 10 260.40 0.48 0.50 486 2000 11 260.46 0.71 0.56 551 2000 12 260.71 0.76 0.57 669 2001 1 260.62 0.83 0.54 232 2001 2 260.46 0.83 0.65 341 2001 3 260.20 1.04 0.78 516 2001 4 260.18 0.90 0.75 534 2001 5 259.60 0.64 0.62 640 2001 6 259.26 0.77 0.75 569 2001 7 258.73 1.21 0.91 540 2001 8 258.14 0.82 0.79 523 2001 9 257.88 0.90 0.69 614 2001 10 258.27 0.99 0.62 395 2001 11 258.55 1.04 0.69 644 2001 12 258.64 1.25 1.17 353 2002 1 nan nan nan 0 2002 2 258.20 1.10 1.03 93 2002 3 258.12 1.28 0.91 587 2002 4 257.94 1.25 0.81 389 2002 5 257.50 1.32 0.76 453 2002 6 257.11 1.12 0.77 593 2002 7 256.66 0.99 0.86 581 2002 8 256.24 0.99 1.41 537 2002 9 255.97 0.87 0.64 527 2002 10 256.02 0.79 0.68 606 2002 11 256.28 0.97 0.58 608 2002 12 256.38 1.05 0.80 425 2003 1 256.36 0.97 0.73 319 2003 2 256.32 0.84 0.70 453 2003 3 256.00 0.90 0.73 649 2003 4 255.78 1.00 0.74 596 2003 5 255.86 0.78 0.62 641 2003 6 255.24 0.94 0.82 504 2003 7 254.76 0.90 0.74 645 2003 8 254.00 1.03 0.64 612 2003 9 253.81 1.13 0.61 532 2003 10 254.08 0.85 0.46 640 2003 11 254.25 0.73 0.56 637 2003 12 254.24 0.64 0.42 674 2004 1 254.06 0.67 0.39 650 2004 2 253.88 0.59 0.39 488 2004 3 253.75 0.61 0.38 387 2004 4 253.59 0.65 0.40 289 2004 5 253.29 0.87 0.55 59 2004 6 252.71 1.55 1.12 94 2004 7 252.23 1.16 0.90 645 2004 8 251.74 1.04 0.72 544 2004 9 251.48 0.74 0.60 687 2004 10 251.74 0.71 0.48 290 2004 11 251.97 0.65 0.46 534 2004 12 252.00 0.65 0.47 386 2005 1 252.02 0.73 0.61 596 2005 2 251.82 0.61 0.47 658 2005 3 251.68 0.61 0.42 730 2005 4 251.62 0.68 0.54 606 2005 5 251.35 0.73 0.46 365 2005 6 251.26 0.66 0.54 656 2005 7 250.74 0.95 0.58 347 2005 8 250.30 1.00 0.71 348 2005 9 249.75 0.83 0.51 363 2005 10 249.91 0.72 0.62 725 2005 11 250.05 0.54 0.50 697 2005 12 250.02 0.53 0.50 724 2006 1 249.80 0.58 0.71 674 2006 2 249.56 0.65 0.70 597 2006 3 249.52 0.57 0.77 679 2006 4 249.11 0.73 0.97 307 2006 5 248.81 0.66 0.66 445 2006 6 248.63 0.64 0.82 504 2006 7 247.89 0.59 0.65 255 2006 8 247.16 0.34 0.50 343 2006 9 247.03 0.36 0.65 335 2006 10 247.19 0.41 0.63 329 2006 11 247.40 0.49 0.60 531 2006 12 247.59 0.52 0.73 709 2007 1 247.47 0.50 0.55 735 2007 2 247.30 0.50 0.54 663 2007 3 247.18 0.49 0.68 690 2007 4 246.82 0.54 0.76 595 2007 5 246.43 0.49 0.76 567 2007 6 246.28 0.62 1.02 559 2007 7 245.96 0.59 1.01 652 2007 8 245.49 0.99 1.57 673 2007 9 245.17 1.09 1.55 675 2007 10 245.08 1.02 1.59 700 2007 11 245.29 0.89 1.39 578 2007 12 245.39 0.75 1.20 647 2008 1 245.18 0.68 1.05 709 2008 2 245.22 0.63 0.97 662 2008 3 245.17 0.70 1.14 389 2008 4 244.70 0.73 1.11 707 2008 5 244.37 0.71 1.16 687 2008 6 244.16 0.72 1.12 708 2008 7 243.69 0.83 1.15 725 2008 8 243.25 0.91 1.24 728 2008 9 243.48 0.85 0.99 642 2008 10 243.82 0.58 0.62 613 2008 11 244.02 0.52 0.41 669 2008 12 244.22 0.51 0.49 672 2009 1 244.08 0.55 0.54 617 2009 2 243.80 0.50 0.41 632 2009 3 243.64 0.46 0.37 618 2009 4 243.46 0.44 0.63 355 2009 5 242.77 0.42 0.51 683 2009 6 242.31 0.36 0.47 668 2009 7 242.23 0.49 0.78 737 2009 8 241.80 0.54 0.72 706 2009 9 241.51 0.48 0.60 626 2009 10 241.65 0.38 0.58 729 2009 11 241.84 0.49 0.43 710 2009 12 242.10 0.52 0.52 659 2010 1 242.08 0.56 0.69 666 2010 2 241.66 1.59 1.06 425 2010 3 241.57 1.33 0.97 351 2010 4 241.39 0.41 0.44 343 2010 5 241.13 0.38 0.46 309 2010 6 240.56 0.43 0.59 370 2010 7 240.11 0.51 0.64 648 2010 8 239.46 0.50 0.69 733 2010 9 239.30 1.13 0.80 590 2010 10 239.50 0.66 0.72 576 2010 11 239.85 0.66 0.76 706 2010 12 240.03 0.67 0.75 677 2011 1 239.80 0.84 0.82 673 2011 2 239.62 0.76 0.85 674 2011 3 239.48 0.69 0.87 619 2011 4 239.29 0.82 0.85 281 2011 5 239.02 0.79 0.89 547 2011 6 238.62 0.63 0.80 712 2011 7 238.01 0.67 0.86 733 2011 8 237.70 0.70 0.93 737 2011 9 237.51 0.68 0.91 722 2011 10 237.77 0.78 0.93 728 2011 11 238.05 0.86 0.98 707 2011 12 238.13 0.83 0.88 703 2012 1 238.05 0.86 0.89 745 2012 2 237.68 0.78 0.83 679 2012 3 237.72 0.71 0.76 717 2012 4 237.46 0.73 0.81 697 2012 5 237.13 0.73 0.87 649 2012 6 236.30 1.00 0.80 647 2012 7 235.50 0.92 0.60 460 2012 8 235.14 1.31 1.17 109 2012 9 235.12 1.41 1.19 656 2012 10 235.73 1.04 1.18 700 2012 11 236.41 1.28 1.36 685 2012 12 236.21 1.62 1.70 695 2013 1 236.32 1.41 1.41 594 2013 2 236.18 1.57 1.54 325 2013 3 235.70 1.46 1.46 349 2013 4 235.75 1.34 1.40 346 2013 5 235.52 0.61 0.73 692 2013 6 235.67 0.44 0.83 708 2013 7 235.06 0.72 0.65 725 2013 8 234.27 1.24 0.66 707 2013 9 234.07 0.88 0.61 707 2013 10 234.70 0.43 0.55 739 2013 11 234.98 0.59 0.43 714 2013 12 235.17 0.53 0.42 741 2014 1 234.92 0.49 0.46 484 2014 2 234.42 0.44 0.38 611 2014 3 234.19 0.60 0.45 659 2014 4 234.07 0.85 0.54 702 2014 5 234.49 1.10 0.59 544 2014 6 234.07 0.48 0.52 670 2014 7 233.87 0.42 0.55 726 2014 8 233.58 0.39 0.47 734 2014 9 233.52 0.45 0.45 704 2014 10 233.75 0.68 0.57 708 2014 11 234.19 0.47 0.46 706 2014 12 234.12 0.43 0.39 738 2015 1 233.84 0.48 0.45 738 2015 2 233.61 0.55 0.45 658 2015 3 233.32 0.46 0.43 745 2015 4 233.08 0.37 0.40 711 2015 5 233.04 0.37 0.67 745 2015 6 232.99 0.40 1.05 692 2015 7 232.23 0.36 0.49 724 2015 8 231.92 0.34 0.49 740 2015 9 231.86 0.31 0.36 712 2015 10 232.26 0.37 0.39 724 2015 11 232.83 0.35 0.39 623 2015 12 232.95 0.39 0.56 730 2016 1 232.66 0.42 0.49 719 2016 2 232.34 0.51 0.44 679 2016 3 232.15 0.42 0.43 704 2016 4 231.91 0.39 0.38 699 2016 5 231.92 0.34 0.49 713 2016 6 231.72 0.42 0.53 703 2016 7 231.54 0.46 0.68 721 2016 8 231.07 0.36 0.54 717 2016 9 230.84 0.39 0.51 702 2016 10 231.32 0.42 0.81 725 2016 11 231.80 0.39 0.42 692 2016 12 232.09 0.48 0.51 707 2017 1 231.73 0.51 0.45 674 2017 2 231.67 0.58 0.63 370 2017 3 231.24 0.48 0.51 713 2017 4 230.81 0.44 0.54 707 2017 5 230.69 0.43 0.49 707 2017 6 230.59 0.39 0.47 601 2017 7 230.59 0.54 0.56 675 2017 8 230.14 0.41 0.40 659 2017 9 230.19 0.30 0.46 686 2017 10 230.74 0.30 0.43 724 2017 11 231.08 0.35 0.45 710 2017 12 231.08 0.41 0.41 721 2018 1 230.80 0.42 0.52 708 2018 2 230.65 0.44 0.50 632 2018 3 229.89 0.41 0.45 713 2018 4 229.67 0.32 0.40 700 2018 5 229.45 0.33 0.40 719 2018 6 229.19 0.44 0.48 690 2018 7 228.92 0.41 0.61 723 2018 8 228.34 0.46 0.46 676 2018 9 228.32 0.30 0.40 684 2018 10 228.68 0.29 0.38 645 2018 11 229.17 0.41 0.49 667 2018 12 229.34 0.41 0.36 629 2019 1 229.20 0.80 0.79 655 2019 2 228.87 1.11 0.83 565 2019 3 228.53 0.80 0.62 635 2019 4 228.29 0.67 0.57 656 2019 5 228.06 0.52 0.49 663 2019 6 227.76 0.70 0.55 645 2019 7 227.42 1.53 0.87 602 2019 8 226.68 0.51 0.41 669 2019 9 226.58 0.43 0.42 585 2019 10 226.63 0.41 0.38 706 2019 11 226.77 0.95 0.73 593 2019 12 226.65 0.44 0.42 699 2020 1 226.58 0.43 0.40 717 2020 2 226.36 0.31 0.56 696 2020 3 226.22 0.42 0.47 737 2020 4 225.94 0.34 0.36 670 2020 5 225.52 0.30 0.33 691 2020 6 225.19 0.31 0.39 668 2020 7 224.70 0.70 0.53 652 2020 8 224.29 0.66 0.52 668 2020 9 223.96 0.52 0.44 610 2020 10 224.00 0.61 0.54 472 2020 11 224.07 0.86 0.43 382 2020 12 223.84 0.61 0.43 495 2021 1 223.62 0.45 0.38 624 2021 2 223.45 0.35 0.35 607 2021 3 223.21 0.39 0.45 703 2021 4 223.00 0.39 0.44 662 2021 5 222.77 0.85 0.57 457 2021 6 222.00 0.55 0.69 659 2021 7 221.50 0.55 0.56 636 2021 8 220.75 0.45 0.58 701 2021 9 220.63 0.31 0.38 692 2021 10 220.74 0.26 0.34 704 2021 11 220.88 0.24 0.33 686 2021 12 220.94 0.47 0.58 707 2022 1 220.89 0.68 0.83 700 2022 2 220.71 0.74 0.96 654 2022 3 220.42 1.08 1.17 683 2022 4 220.30 0.67 0.96 697 2022 5 220.12 0.48 0.62 709 2022 6 219.76 0.93 1.04 663 2022 7 219.07 0.83 0.93 701 2022 8 218.51 0.96 1.13 411 2022 9 218.31 1.11 1.49 694 2022 10 218.33 1.01 1.38 708 2022 11 218.48 1.05 1.23 664 2022 12 218.50 0.51 0.67 735 2023 1 218.42 0.66 0.76 686 2023 2 218.19 0.85 1.03 637 2023 3 218.11 0.68 0.73 688 2023 4 218.00 0.39 0.64 699 2023 5 217.61 0.52 0.90 737 2023 6 217.25 0.73 1.12 239 2023 7 217.05 1.26 1.76 507 2023 8 216.64 1.33 1.84 706 2023 9 216.17 1.00 1.54 671 2023 10 216.33 0.97 1.41 714 2023 11 216.53 1.03 1.70 710 2023 12 216.66 0.82 1.31 705 2024 1 216.72 1.02 1.40 665 2024 2 216.56 1.05 1.35 133