# file: mlo_F12_MM.dat # date: Mon, Jun 28, 2021 3:49:44 PM # # Chloroflurocarbon-12 (F12) 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/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: Chloroflurocarbon-12 data from # the NOAA/ESRL halocarbons in situ program. # # DOI: http://doi.org/10.7289/V5X0659V # # Calibration scale used: NOAA 2008 # # 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 F12 in ppt, uncertainty (unc), std. dev. (sd), number of samples # F12catsMLOyr F12catsMLOmon F12catsMLOm F12catsMLOunc F12catsMLOsd F12catsMLOn 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 6 539.25 1.90 1.91 57 1999 7 540.50 1.44 1.59 348 1999 8 540.68 1.41 1.91 322 1999 9 541.52 1.57 2.32 192 1999 10 541.86 1.44 1.83 308 1999 11 543.10 1.41 1.86 290 1999 12 542.23 2.46 2.18 351 2000 1 542.31 2.18 2.02 523 2000 2 541.96 2.17 2.13 607 2000 3 542.14 1.99 2.01 694 2000 4 542.16 1.85 1.84 682 2000 5 542.19 1.73 2.20 654 2000 6 543.06 1.85 2.17 533 2000 7 543.26 2.02 2.48 544 2000 8 542.98 1.79 1.85 156 2000 9 nan nan nan 0 2000 10 543.37 1.07 0.69 242 2000 11 543.07 1.14 1.11 347 2000 12 543.06 1.02 0.75 625 2001 1 543.01 1.15 0.73 406 2001 2 542.76 0.98 0.85 645 2001 3 542.73 0.93 0.73 728 2001 4 542.30 0.95 0.74 694 2001 5 542.57 0.85 0.72 720 2001 6 542.50 0.86 0.80 344 2001 7 542.38 0.87 0.67 630 2001 8 542.81 0.87 0.67 711 2001 9 543.00 0.80 0.73 698 2001 10 543.57 0.87 0.78 723 2001 11 543.70 0.94 0.77 703 2001 12 543.61 1.20 0.81 636 2002 1 543.43 1.06 0.70 655 2002 2 543.08 1.07 0.85 652 2002 3 542.99 1.10 0.77 723 2002 4 543.07 1.14 0.78 707 2002 5 543.06 1.01 0.73 692 2002 6 544.11 0.94 0.84 713 2002 7 543.70 0.97 0.79 684 2002 8 543.72 1.18 0.83 676 2002 9 543.92 1.22 0.95 585 2002 10 544.31 1.22 1.16 705 2002 11 544.63 1.26 0.97 680 2002 12 544.31 1.24 0.91 699 2003 1 544.08 1.15 0.90 669 2003 2 543.59 0.83 0.78 640 2003 3 543.44 1.08 0.86 699 2003 4 543.26 1.09 0.73 694 2003 5 543.02 0.93 0.76 731 2003 6 542.85 0.91 0.79 694 2003 7 542.86 0.89 0.74 680 2003 8 542.81 0.87 0.72 686 2003 9 543.27 0.92 0.85 646 2003 10 543.32 1.04 0.79 669 2003 11 543.35 1.01 0.72 675 2003 12 543.22 1.06 0.77 728 2004 1 543.00 1.02 0.76 735 2004 2 542.77 1.01 0.86 652 2004 3 542.50 1.08 0.79 663 2004 4 542.59 0.99 0.67 715 2004 5 543.06 0.95 0.89 682 2004 6 543.46 0.89 0.65 667 2004 7 543.43 0.87 0.64 629 2004 8 543.32 1.02 0.67 585 2004 9 543.48 0.90 0.76 648 2004 10 543.61 0.95 0.71 703 2004 11 543.84 1.02 0.76 702 2004 12 543.63 1.06 0.72 679 2005 1 543.26 1.19 0.81 650 2005 2 543.24 1.23 0.82 632 2005 3 543.02 1.21 0.96 715 2005 4 543.09 1.23 0.87 667 2005 5 542.89 1.22 0.91 692 2005 6 542.75 1.17 0.87 677 2005 7 542.45 1.24 0.84 693 2005 8 542.30 3.59 0.86 524 2005 9 542.37 2.51 0.96 646 2005 10 542.66 2.21 0.85 601 2005 11 542.73 4.65 0.87 513 2005 12 542.81 2.24 0.93 566 2006 1 542.82 1.90 1.00 642 2006 2 542.33 2.53 1.13 559 2006 3 541.96 2.34 1.57 680 2006 4 541.66 2.20 1.00 669 2006 5 541.49 1.43 1.11 701 2006 6 541.42 1.42 0.98 654 2006 7 540.99 1.36 0.91 662 2006 8 540.63 1.42 0.91 683 2006 9 540.38 1.36 0.94 528 2006 10 540.58 1.55 0.95 606 2006 11 540.51 2.06 1.31 683 2006 12 540.51 1.89 1.28 696 2007 1 540.25 2.42 1.67 679 2007 2 539.88 2.50 1.90 627 2007 3 539.26 2.52 1.86 278 2007 4 539.42 2.15 1.47 170 2007 5 539.10 1.64 1.21 673 2007 6 538.91 1.67 1.34 687 2007 7 538.80 1.71 1.54 691 2007 8 538.72 2.90 3.23 584 2007 9 538.07 3.89 3.59 617 2007 10 539.29 9.01 4.03 283 2007 11 539.20 5.36 3.52 130 2007 12 538.00 1.49 1.55 225 2008 1 537.73 3.43 2.13 663 2008 2 537.41 2.29 1.95 470 2008 3 537.26 2.19 3.14 689 2008 4 536.61 3.72 4.37 492 2008 5 536.90 3.32 3.10 93 2008 6 536.78 4.19 3.58 671 2008 7 536.49 3.54 3.16 691 2008 8 536.75 4.28 3.73 692 2008 9 536.64 4.95 3.87 647 2008 10 536.35 4.29 5.04 590 2008 11 536.29 2.77 3.39 659 2008 12 535.42 1.99 3.79 692 2009 1 535.40 2.46 3.45 643 2009 2 534.97 2.09 4.05 627 2009 3 534.35 2.04 2.11 696 2009 4 534.39 1.77 1.02 690 2009 5 534.23 2.91 1.45 697 2009 6 533.87 3.29 1.26 619 2009 7 533.80 2.24 1.25 684 2009 8 534.32 2.24 1.08 642 2009 9 534.39 3.18 1.43 660 2009 10 533.61 1.99 1.15 727 2009 11 533.61 1.93 1.20 691 2009 12 534.00 2.72 1.26 683 2010 1 534.11 2.46 1.23 666 2010 2 533.96 3.59 1.66 638 2010 3 532.27 2.35 1.64 719 2010 4 533.02 2.45 1.54 663 2010 5 532.68 3.67 1.57 674 2010 6 532.16 3.68 1.62 658 2010 7 531.56 3.93 1.58 660 2010 8 531.45 2.01 1.13 487 2010 9 531.56 3.29 1.63 543 2010 10 531.39 3.29 1.49 704 2010 11 530.85 3.50 1.62 660 2010 12 529.92 2.21 1.33 679 2011 1 530.07 2.44 1.49 558 2011 2 529.07 2.36 1.38 651 2011 3 529.07 2.58 1.60 708 2011 4 528.38 2.21 1.34 665 2011 5 528.18 2.06 1.33 664 2011 6 528.18 2.83 1.61 631 2011 7 528.21 3.50 1.73 712 2011 8 527.48 2.95 1.80 723 2011 9 527.22 3.08 1.69 698 2011 10 527.35 3.01 1.50 724 2011 11 526.84 1.56 1.04 697 2011 12 526.99 2.36 1.38 705 2012 1 527.08 4.48 1.87 708 2012 2 527.44 2.89 1.81 662 2012 3 526.11 2.23 1.57 568 2012 4 525.80 3.30 2.16 702 2012 5 525.86 3.66 2.02 697 2012 6 525.20 3.09 1.88 662 2012 7 524.92 3.81 1.98 708 2012 8 524.67 3.09 1.65 725 2012 9 524.96 4.06 2.05 668 2012 10 526.30 2.55 1.57 675 2012 11 524.93 3.23 1.95 685 2012 12 526.42 1.54 1.39 710 2013 1 526.43 1.16 0.78 654 2013 2 525.37 1.45 1.64 643 2013 3 523.48 3.24 1.94 710 2013 4 522.92 3.05 1.54 702 2013 5 522.28 2.45 1.47 740 2013 6 522.15 3.65 1.90 690 2013 7 521.87 3.00 1.68 673 2013 8 522.49 2.38 1.44 501 2013 9 522.75 3.32 1.65 664 2013 10 521.97 2.74 1.39 714 2013 11 521.79 2.36 1.43 664 2013 12 520.72 2.07 1.37 714 2014 1 520.19 2.45 1.67 707 2014 2 520.96 3.51 2.76 590 2014 3 520.71 2.30 1.33 693 2014 4 520.58 2.50 1.37 678 2014 5 520.14 2.60 1.46 653 2014 6 519.93 3.05 1.54 690 2014 7 519.95 1.27 1.32 107 2014 8 519.33 0.76 1.28 588 2014 9 518.97 0.82 1.24 710 2014 10 518.96 0.87 1.42 622 2014 11 518.78 0.92 1.58 701 2014 12 518.40 0.87 1.52 707 2015 1 518.26 0.78 1.32 730 2015 2 517.89 0.79 1.24 644 2015 3 517.56 0.90 1.34 714 2015 4 516.93 1.09 1.73 679 2015 5 517.01 1.61 2.44 660 2015 6 516.22 6.34 2.21 565 2015 7 516.10 1.26 2.05 722 2015 8 515.44 1.76 1.36 663 2015 9 515.16 1.13 1.07 686 2015 10 515.09 1.61 1.49 720 2015 11 515.02 1.67 1.64 705 2015 12 515.28 2.12 1.84 675 2016 1 515.41 1.91 1.83 706 2016 2 514.74 2.83 2.11 637 2016 3 513.89 2.77 1.87 603 2016 4 513.82 3.10 2.32 680 2016 5 513.13 2.57 1.97 707 2016 6 512.31 2.21 1.85 700 2016 7 511.94 1.78 1.52 730 2016 8 511.60 1.58 1.47 711 2016 9 511.52 1.56 1.72 666 2016 10 511.48 1.65 1.76 711 2016 11 511.38 2.45 1.72 698 2016 12 510.73 1.82 1.58 653 2017 1 510.60 1.93 1.59 669 2017 2 510.04 3.49 1.54 508 2017 3 509.77 2.21 1.79 670 2017 4 509.53 2.08 2.28 631 2017 5 508.76 1.83 1.88 729 2017 6 508.80 2.59 2.30 711 2017 7 508.41 2.38 2.18 383 2017 8 506.85 1.44 1.42 724 2017 9 507.01 1.32 1.45 708 2017 10 507.17 1.34 1.35 718 2017 11 507.64 1.19 0.98 704 2017 12 507.58 1.10 0.94 720 2018 1 507.46 1.12 0.89 727 2018 2 507.20 0.98 0.83 659 2018 3 506.98 0.93 0.97 710 2018 4 506.76 1.40 1.62 712 2018 5 506.24 1.63 1.53 657 2018 6 506.30 2.05 1.82 687 2018 7 505.49 2.18 1.59 722 2018 8 505.42 2.31 1.45 694 2018 9 505.60 1.54 1.47 715 2018 10 505.43 1.36 1.51 660 2018 11 505.49 1.85 1.78 708 2018 12 505.66 1.57 1.64 727 2019 1 505.65 1.88 1.81 613 2019 2 504.26 1.67 1.74 575 2019 3 504.59 2.38 1.88 692 2019 4 504.02 2.21 1.97 687 2019 5 503.00 2.15 2.31 663 2019 6 501.59 1.70 1.56 720 2019 7 501.06 1.53 1.56 740 2019 8 500.91 1.56 1.47 708 2019 9 500.49 1.62 1.57 675 2019 10 500.08 1.81 1.79 742 2019 11 500.07 1.61 1.66 716 2019 12 499.93 1.85 1.80 601 2020 1 499.53 1.94 1.75 649 2020 2 499.17 2.00 1.91 673 2020 3 498.83 2.16 1.86 667 2020 4 498.48 1.80 1.53 708 2020 5 498.15 1.71 1.57 729 2020 6 498.00 1.83 1.66 711 2020 7 497.63 1.85 1.59 687 2020 8 497.32 2.10 1.75 717 2020 9 497.01 2.08 1.76 701 2020 10 496.75 1.72 1.64 723 2020 11 496.12 1.37 1.77 360 2020 12 495.92 1.73 1.92 710 2021 1 495.01 1.31 1.95 601 2021 2 495.00 1.55 1.93 653 2021 3 494.47 1.26 1.80 684 2021 4 493.53 1.57 1.93 668 2021 5 493.30 1.54 1.78 724 2021 6 493.19 1.97 1.96 322