# file: mlo_HCFC142b_MM.dat # date: Thu, Sep 27, 2018 3:22:58 PM # # Hydrochlorofluorocarbon-142b (HCFC142b) 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/GMD1 # 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: Hydrochlorofluorocarbon-142b data from # the NOAA/ESRL halocarbons in situ program. # # DOI: http://doi.org/10.7289/V5X0659V # # Calibration scale used: NOAA 1994 # # 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. # # year, month, monthly median of HCFC142b in ppt, std. dev., number of samples # HCFC142bcatsMLOyr HCFC142bcatsMLOmon HCFC142bcatsMLOm HCFC142bcatsMLOsd HCFC142bcatsMLOn 1998 1 nan nan 0 1998 2 nan nan 0 1998 3 nan nan 0 1998 4 nan nan 0 1998 5 nan nan 0 1998 6 nan nan 0 1998 7 nan nan 0 1998 8 nan nan 0 1998 9 nan nan 0 1998 10 nan nan 0 1998 11 nan nan 0 1998 12 nan nan 0 1999 1 10.84 0.50 637 1999 2 10.84 0.37 70 1999 3 11.15 0.47 516 1999 4 11.80 0.45 154 1999 5 11.68 0.37 590 1999 6 11.69 0.46 529 1999 7 10.90 0.56 621 1999 8 10.99 0.54 423 1999 9 11.45 0.39 306 1999 10 11.36 0.48 573 1999 11 11.60 0.49 572 1999 12 11.92 0.72 408 2000 1 11.86 0.83 591 2000 2 11.56 0.76 616 2000 3 11.74 0.82 741 2000 4 11.92 0.86 691 2000 5 11.77 0.82 668 2000 6 12.03 0.87 570 2000 7 12.05 0.82 590 2000 8 12.26 0.77 163 2000 9 12.30 0.83 319 2000 10 12.51 1.03 696 2000 11 12.57 1.14 345 2000 12 12.60 1.13 645 2001 1 12.85 0.99 453 2001 2 12.73 1.15 656 2001 3 12.75 1.18 736 2001 4 12.75 1.22 707 2001 5 12.70 1.13 737 2001 6 12.65 1.25 349 2001 7 13.01 1.24 114 2001 8 12.36 1.08 165 2001 9 13.21 0.98 321 2001 10 13.30 0.78 739 2001 11 13.36 0.77 416 2001 12 12.87 0.85 144 2002 1 12.95 0.92 115 2002 2 13.32 0.93 392 2002 3 13.37 0.77 732 2002 4 13.32 0.83 697 2002 5 13.44 0.83 703 2002 6 13.66 0.85 709 2002 7 13.37 0.89 683 2002 8 13.88 0.99 176 2002 9 nan nan 0 2002 10 nan nan 0 2002 11 nan nan 0 2002 12 nan nan 0 2003 1 nan nan 0 2003 2 13.76 2.77 33 2003 3 13.19 2.16 551 2003 4 12.35 2.84 29 2003 5 nan nan 0 2003 6 13.98 1.65 120 2003 7 14.54 1.81 248 2003 8 14.43 1.08 513 2003 9 14.58 0.78 636 2003 10 14.70 0.76 241 2003 11 14.90 0.75 523 2003 12 14.80 0.85 733 2004 1 14.28 0.76 732 2004 2 14.50 0.81 677 2004 3 14.56 0.82 675 2004 4 14.82 0.81 704 2004 5 14.69 0.81 689 2004 6 14.70 0.96 655 2004 7 14.78 0.86 651 2004 8 14.84 0.78 602 2004 9 15.13 0.77 623 2004 10 15.23 0.80 713 2004 11 15.16 0.88 715 2004 12 15.09 0.82 685 2005 1 15.16 0.84 663 2005 2 15.12 0.85 634 2005 3 15.30 0.81 708 2005 4 15.07 0.85 551 2005 5 15.19 0.93 489 2005 6 15.36 0.81 185 2005 7 15.34 0.96 450 2005 8 15.67 1.04 391 2005 9 15.85 0.76 442 2005 10 16.04 0.76 393 2005 11 nan nan 0 2005 12 nan nan 0 2006 1 nan nan 0 2006 2 nan nan 0 2006 3 nan nan 0 2006 4 16.50 0.82 142 2006 5 16.66 0.86 699 2006 6 16.51 1.00 674 2006 7 16.54 1.00 673 2006 8 16.48 0.95 709 2006 9 16.79 0.89 532 2006 10 17.00 0.88 616 2006 11 17.21 1.05 686 2006 12 17.26 1.16 708 2007 1 17.43 1.86 678 2007 2 16.66 2.66 541 2007 3 17.35 2.51 672 2007 4 17.50 2.18 647 2007 5 16.81 3.22 342 2007 6 17.42 1.88 168 2007 7 17.58 1.79 215 2007 8 17.87 1.94 585 2007 9 18.27 2.20 591 2007 10 18.19 2.66 576 2007 11 17.93 1.25 351 2007 12 18.17 0.52 700 2008 1 19.14 0.63 417 2008 2 nan nan 0 2008 3 nan nan 0 2008 4 nan nan 0 2008 5 nan nan 0 2008 6 18.28 1.78 639 2008 7 19.43 2.01 672 2008 8 19.40 1.51 689 2008 9 19.17 1.83 660 2008 10 19.57 1.26 417 2008 11 19.85 0.94 461 2008 12 19.71 1.00 655 2009 1 20.34 1.00 706 2009 2 20.95 0.92 668 2009 3 20.96 0.99 663 2009 4 21.01 1.02 710 2009 5 21.14 0.97 717 2009 6 20.65 0.96 702 2009 7 20.00 1.10 725 2009 8 20.26 1.00 663 2009 9 20.22 1.24 719 2009 10 20.84 1.27 731 2009 11 20.30 1.23 705 2009 12 20.26 1.62 713 2010 1 19.77 1.65 715 2010 2 20.23 1.78 659 2010 3 19.84 2.16 686 2010 4 19.91 2.45 558 2010 5 20.52 2.83 358 2010 6 20.23 1.22 672 2010 7 20.98 1.13 723 2010 8 20.87 1.05 635 2010 9 21.18 1.02 561 2010 10 21.36 1.08 722 2010 11 21.27 0.91 702 2010 12 21.04 0.81 685 2011 1 20.99 0.86 583 2011 2 20.82 0.94 663 2011 3 20.99 1.03 717 2011 4 20.80 1.10 704 2011 5 21.04 1.02 657 2011 6 20.99 1.16 595 2011 7 20.92 1.35 730 2011 8 20.93 1.56 740 2011 9 21.08 1.57 623 2011 10 21.52 1.45 733 2011 11 21.36 1.53 706 2011 12 21.14 1.62 729 2012 1 21.81 1.73 727 2012 2 21.20 1.49 622 2012 3 21.33 1.23 549 2012 4 21.23 1.42 705 2012 5 21.69 1.33 715 2012 6 21.54 1.46 669 2012 7 21.45 1.67 684 2012 8 21.72 1.70 685 2012 9 22.03 1.64 649 2012 10 21.95 1.61 578 2012 11 22.20 1.25 713 2012 12 21.75 1.29 728 2013 1 21.83 1.07 654 2013 2 21.51 1.04 651 2013 3 21.78 1.01 706 2013 4 21.91 1.24 707 2013 5 22.31 1.65 713 2013 6 22.04 1.49 697 2013 7 22.12 1.32 679 2013 8 22.15 1.70 518 2013 9 22.29 2.02 644 2013 10 22.44 1.47 519 2013 11 22.01 1.33 663 2013 12 22.35 1.34 712 2014 1 22.03 1.09 730 2014 2 21.69 1.12 603 2014 3 22.19 1.16 698 2014 4 22.76 1.16 705 2014 5 22.35 1.19 657 2014 6 23.34 1.19 676 2014 7 23.08 0.92 712 2014 8 23.24 0.71 612 2014 9 23.39 0.74 709 2014 10 23.12 0.66 629 2014 11 23.51 0.71 696 2014 12 23.57 0.59 669 2015 1 23.21 0.66 720 2015 2 23.08 0.68 666 2015 3 23.30 0.59 726 2015 4 23.50 0.67 703 2015 5 23.17 0.71 709 2015 6 22.84 0.76 660 2015 7 22.43 0.70 729 2015 8 22.16 0.72 678 2015 9 22.41 0.89 695 2015 10 22.79 1.02 731 2015 11 22.67 1.09 719 2015 12 21.97 0.86 609 2016 1 22.10 0.97 717 2016 2 22.15 0.92 677 2016 3 21.10 0.86 585 2016 4 21.81 1.12 680 2016 5 22.05 0.87 721 2016 6 22.64 0.65 711 2016 7 22.44 0.68 731 2016 8 22.63 0.56 694 2016 9 23.03 0.54 679 2016 10 23.20 0.66 731 2016 11 23.25 0.66 715 2016 12 23.18 0.71 142 2017 1 nan nan 0 2017 2 22.75 0.54 666 2017 3 22.47 0.54 645 2017 4 22.63 0.58 708 2017 5 22.74 0.40 713 2017 6 22.58 0.42 684 2017 7 22.53 0.48 433 2017 8 nan nan 0 2017 9 nan nan 0 2017 10 nan nan 0 2017 11 nan nan 0 2017 12 nan nan 0 2018 1 nan nan 0 2018 2 nan nan 0 2018 3 nan nan 0 2018 4 nan nan 0 2018 5 nan nan 0 2018 6 nan nan 0 2018 7 nan nan 0 2018 8 nan nan 0 2018 9 nan nan 0