# file: mlo_F11_MM.dat # date: 2023-08-29 # # Chlorofluorocarbon-11 (F11) data from hourly in situ samples analyzed on a gas chromatograph located # at Mauna Loa (MLO), Hawaii (19.539 N, 155.578 W, elevation: 3397 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 Chlorofluorocarbon-11 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 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 # F11catsMLOyr F11catsMLOmon F11catsMLOm F11catsMLOunc F11catsMLOsd F11catsMLOn 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 6 262.77 2.04 0.96 115 1999 7 262.12 1.43 1.18 700 1999 8 262.14 1.46 1.10 639 1999 9 262.11 1.72 1.26 451 1999 10 262.23 1.59 1.22 620 1999 11 262.61 1.57 1.27 577 1999 12 260.97 1.68 1.17 406 2000 1 260.92 2.01 1.27 570 2000 2 260.80 1.91 1.31 622 2000 3 260.67 1.76 1.29 710 2000 4 260.46 1.65 1.22 688 2000 5 260.21 1.68 1.34 658 2000 6 260.21 2.40 1.64 544 2000 7 260.24 2.06 1.75 570 2000 8 260.01 2.18 1.69 161 2000 9 260.57 2.77 2.11 208 2000 10 259.84 0.55 0.37 249 2000 11 259.96 0.34 0.52 359 2000 12 259.94 0.34 0.45 624 2001 1 259.84 0.41 0.45 421 2001 2 259.43 0.31 0.42 645 2001 3 259.21 0.32 0.38 738 2001 4 258.74 0.31 0.44 699 2001 5 258.62 0.28 0.30 732 2001 6 258.31 0.30 2.19 344 2001 7 257.53 0.27 0.27 632 2001 8 257.46 0.26 0.27 719 2001 9 257.51 0.26 0.29 702 2001 10 257.70 0.29 0.31 732 2001 11 257.68 0.29 0.35 707 2001 12 257.45 0.33 0.35 644 2002 1 257.27 0.31 0.35 676 2002 2 256.91 0.34 0.35 652 2002 3 256.74 0.35 0.31 730 2002 4 256.50 0.34 0.32 715 2002 5 256.15 0.33 0.32 689 2002 6 256.20 0.30 0.35 713 2002 7 255.78 0.29 0.28 685 2002 8 255.55 0.34 0.30 698 2002 9 255.55 0.42 0.33 594 2002 10 255.54 0.30 0.38 646 2002 11 255.58 0.32 0.34 323 2002 12 255.36 0.31 0.32 336 2003 1 255.12 0.30 0.36 498 2003 2 254.91 0.30 0.29 642 2003 3 254.80 0.29 0.33 717 2003 4 254.68 0.30 0.30 696 2003 5 254.37 0.24 0.28 736 2003 6 254.02 0.24 0.29 707 2003 7 253.83 0.23 0.31 686 2003 8 253.67 0.26 0.25 697 2003 9 253.84 0.24 0.37 656 2003 10 253.65 0.32 0.32 679 2003 11 253.57 0.29 0.37 688 2003 12 253.48 0.28 0.33 726 2004 1 253.21 0.29 0.30 739 2004 2 252.98 0.29 0.44 666 2004 3 252.67 0.30 0.46 666 2004 4 252.64 0.29 0.35 716 2004 5 252.43 0.29 0.31 675 2004 6 252.17 0.27 0.27 668 2004 7 251.98 0.27 0.27 637 2004 8 251.84 0.28 0.25 584 2004 9 251.81 0.27 0.28 641 2004 10 251.72 0.28 0.31 696 2004 11 251.83 0.25 0.32 697 2004 12 251.60 0.29 0.30 687 2005 1 251.32 0.30 0.31 650 2005 2 251.16 0.29 0.30 636 2005 3 250.96 0.31 0.36 714 2005 4 250.79 0.29 0.37 657 2005 5 250.51 0.28 0.38 703 2005 6 250.24 0.29 0.33 671 2005 7 250.05 0.31 0.30 690 2005 8 249.96 1.47 0.48 666 2005 9 249.88 0.57 0.39 673 2005 10 249.76 0.74 0.39 688 2005 11 249.70 1.29 0.45 642 2005 12 249.62 0.51 0.37 315 2006 1 nan nan nan 0 2006 2 nan nan nan 0 2006 3 nan nan nan 0 2006 4 nan nan nan 0 2006 5 nan nan nan 0 2006 6 nan nan nan 0 2006 7 nan nan nan 0 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 8 245.74 0.65 1.11 475 2007 9 245.41 0.80 1.15 644 2007 10 245.91 2.76 0.91 385 2007 11 245.55 1.65 0.79 209 2007 12 245.05 0.40 0.37 250 2008 1 244.98 0.99 0.44 635 2008 2 244.72 0.62 0.38 466 2008 3 nan nan nan 0 2008 4 nan nan nan 0 2008 5 244.17 0.83 0.64 92 2008 6 244.34 1.04 0.63 652 2008 7 243.71 0.85 0.60 680 2008 8 243.64 0.98 0.69 667 2008 9 243.74 1.20 0.86 645 2008 10 244.41 0.97 0.67 605 2008 11 243.88 0.66 0.67 651 2008 12 244.11 0.46 0.43 607 2009 1 243.81 0.63 0.57 670 2009 2 244.09 0.52 0.54 617 2009 3 242.75 0.66 0.81 448 2009 4 242.56 0.60 0.47 694 2009 5 242.41 1.06 0.67 700 2009 6 242.25 1.13 0.70 658 2009 7 242.31 0.84 0.66 683 2009 8 242.89 0.79 0.55 640 2009 9 242.98 1.24 0.72 641 2009 10 242.32 0.69 0.61 728 2009 11 242.27 0.75 0.60 697 2009 12 242.44 1.06 0.60 670 2010 1 242.39 1.01 0.68 660 2010 2 242.34 1.36 0.87 553 2010 3 241.56 0.79 0.72 331 2010 4 241.23 0.97 0.75 673 2010 5 240.96 1.35 0.90 691 2010 6 240.60 1.44 0.92 672 2010 7 240.26 1.51 0.92 692 2010 8 240.22 0.86 0.68 493 2010 9 240.13 1.32 0.88 535 2010 10 240.07 1.28 0.84 701 2010 11 239.88 1.29 0.80 660 2010 12 239.56 0.79 0.66 681 2011 1 239.34 0.87 0.69 551 2011 2 239.00 0.83 0.63 656 2011 3 238.88 0.87 0.66 709 2011 4 238.52 0.76 0.62 671 2011 5 238.40 0.70 0.56 667 2011 6 238.32 0.99 0.64 624 2011 7 238.14 1.13 0.75 715 2011 8 237.84 1.02 0.71 717 2011 9 237.79 1.04 0.75 692 2011 10 237.75 1.09 0.71 715 2011 11 237.49 0.53 0.42 700 2011 12 237.54 0.78 0.62 701 2012 1 237.44 1.45 0.75 680 2012 2 237.26 0.91 0.63 629 2012 3 236.82 0.86 0.64 571 2012 4 236.62 1.12 0.85 684 2012 5 236.42 1.23 0.77 678 2012 6 236.08 1.09 0.78 659 2012 7 235.84 1.30 0.84 707 2012 8 235.81 1.09 0.72 719 2012 9 235.91 1.46 0.86 644 2012 10 236.21 1.00 0.73 676 2012 11 235.89 1.05 0.82 673 2012 12 236.29 0.58 0.59 715 2013 1 236.24 0.49 0.41 651 2013 2 235.87 0.61 0.69 643 2013 3 235.04 1.13 0.86 710 2013 4 234.85 0.98 0.72 707 2013 5 234.49 0.77 0.60 729 2013 6 234.14 1.27 0.76 678 2013 7 234.01 1.02 0.71 670 2013 8 234.15 0.91 0.66 497 2013 9 234.23 1.26 0.73 641 2013 10 234.01 1.00 0.65 710 2013 11 234.02 0.81 0.67 664 2013 12 233.79 0.73 0.64 717 2014 1 233.60 0.77 0.70 709 2014 2 233.64 1.13 0.92 588 2014 3 233.69 0.85 0.65 442 2014 4 233.52 0.92 0.64 339 2014 5 233.51 0.92 0.67 526 2014 6 233.46 1.00 0.70 694 2014 7 233.28 1.13 0.83 574 2014 8 232.93 0.32 0.63 622 2014 9 233.22 0.40 0.66 718 2014 10 233.22 0.70 1.07 638 2014 11 233.28 1.14 1.33 706 2014 12 233.04 0.83 1.10 727 2015 1 232.82 0.83 0.95 742 2015 2 232.36 0.92 0.93 669 2015 3 231.99 0.97 1.00 737 2015 4 232.00 1.00 1.04 706 2015 5 232.03 0.90 0.82 735 2015 6 231.63 1.48 1.20 659 2015 7 231.37 1.65 1.87 733 2015 8 231.54 0.73 0.90 649 2015 9 231.77 0.27 0.31 680 2015 10 231.61 0.31 0.34 731 2015 11 231.50 0.34 0.36 696 2015 12 231.37 0.50 0.40 659 2016 1 231.15 0.46 0.39 683 2016 2 230.98 0.65 0.41 600 2016 3 230.76 0.56 0.35 587 2016 4 230.80 0.74 0.47 659 2016 5 230.62 0.51 0.42 715 2016 6 230.54 0.47 0.34 674 2016 7 230.30 0.41 0.35 719 2016 8 230.28 0.33 0.33 714 2016 9 230.45 0.35 0.41 669 2016 10 230.53 0.33 0.38 705 2016 11 230.56 0.53 0.43 692 2016 12 230.54 0.37 0.46 662 2017 1 230.64 0.41 0.40 666 2017 2 229.90 0.73 0.51 584 2017 3 229.87 0.46 0.51 676 2017 4 230.24 0.52 0.52 649 2017 5 230.03 0.41 0.41 734 2017 6 229.88 0.59 0.56 715 2017 7 229.93 0.66 0.58 393 2017 8 230.10 0.36 0.53 720 2017 9 230.43 0.36 0.54 712 2017 10 230.45 0.41 0.62 727 2017 11 230.44 0.40 0.47 687 2017 12 230.39 0.44 0.45 727 2018 1 230.15 0.39 0.42 729 2018 2 229.81 0.33 0.38 664 2018 3 229.52 0.27 0.34 728 2018 4 229.38 0.31 0.34 706 2018 5 229.35 0.32 0.38 657 2018 6 229.37 0.40 0.48 695 2018 7 229.07 0.38 0.45 727 2018 8 228.80 0.41 0.51 705 2018 9 229.00 0.31 0.34 718 2018 10 229.21 0.29 0.31 662 2018 11 229.27 0.34 0.42 700 2018 12 229.06 0.36 0.36 716 2019 1 229.02 0.48 0.40 601 2019 2 228.56 0.38 0.41 581 2019 3 228.42 0.57 0.39 701 2019 4 228.10 0.50 0.40 695 2019 5 227.70 0.47 0.45 654 2019 6 227.18 0.30 0.44 721 2019 7 226.94 0.28 0.41 744 2019 8 226.79 0.31 0.44 711 2019 9 226.80 0.31 0.41 681 2019 10 226.86 0.34 0.42 738 2019 11 226.76 0.31 0.37 714 2019 12 226.55 0.40 0.37 601 2020 1 226.32 0.39 0.43 660 2020 2 225.98 0.58 0.72 671 2020 3 225.50 0.69 0.75 656 2020 4 225.32 0.55 0.61 701 2020 5 225.21 0.51 0.67 730 2020 6 224.96 0.54 0.68 709 2020 7 224.61 0.54 0.70 693 2020 8 224.60 0.59 0.81 712 2020 9 224.48 0.61 0.82 708 2020 10 224.36 0.49 0.74 732 2020 11 224.19 0.42 0.73 362 2020 12 224.05 0.55 0.81 712 2021 1 224.17 0.43 0.64 74 2021 2 223.64 0.48 0.77 463 2021 3 223.34 0.47 0.72 685 2021 4 223.07 0.40 0.70 204 2021 5 222.90 0.49 0.75 430 2021 6 222.50 0.61 1.15 694 2021 7 222.04 0.56 1.82 708 2021 8 222.08 0.58 1.68 697 2021 9 221.92 0.70 1.37 657 2021 10 221.85 0.63 0.65 705 2021 11 221.58 0.56 0.73 705 2021 12 221.46 0.48 0.69 667 2022 1 221.33 0.53 0.88 668 2022 2 221.13 0.75 0.95 614 2022 3 220.82 0.74 0.97 717 2022 4 220.60 0.40 0.68 674 2022 5 220.32 0.56 0.82 726 2022 6 220.15 0.83 1.03 679 2022 7 219.78 0.64 0.90 705 2022 8 219.55 0.57 0.81 727 2022 9 219.53 0.53 0.83 310 2022 10 219.26 0.43 0.72 400 2022 11 219.27 0.56 0.78 661 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