# file: mlo_SF6_MM.dat # date: Mon, Mar 8, 2021 2:25:34 PM # # Sulfur hexaflouride (SF6) 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: Sulfur hexaflouride data from # the NOAA/ESRL halocarbons in situ program. # # DOI: http://doi.org/10.7289/V5X0659V # # Calibration scale used: NOAA 2014 # # 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 SF6 in ppt, uncertainty (unc), std. dev. (sd), number of samples # SF6catsMLOyr SF6catsMLOmon SF6catsMLOm SF6catsMLOunc SF6catsMLOsd SF6catsMLOn 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 nan nan nan 0 1999 7 4.430 0.046 0.104 557 1999 8 4.438 0.042 0.102 586 1999 9 4.506 0.025 0.087 481 1999 10 4.506 0.024 0.066 629 1999 11 4.537 0.030 0.082 325 1999 12 4.573 0.034 0.050 312 2000 1 nan nan nan 0 2000 2 4.569 0.061 0.065 456 2000 3 4.588 0.072 0.083 523 2000 4 4.625 0.038 0.067 547 2000 5 4.606 0.054 0.103 655 2000 6 4.658 0.046 0.097 545 2000 7 4.665 0.037 0.071 577 2000 8 4.678 0.050 0.108 157 2000 9 4.727 0.037 0.072 202 2000 10 4.736 0.047 0.088 681 2000 11 4.663 0.116 0.216 76 2000 12 4.738 0.111 0.210 519 2001 1 4.782 0.076 0.163 424 2001 2 4.808 0.063 0.140 620 2001 3 4.821 0.074 0.148 692 2001 4 4.853 0.042 0.104 691 2001 5 4.855 0.031 0.075 728 2001 6 4.843 0.047 0.084 345 2001 7 4.881 0.076 0.195 640 2001 8 4.856 0.094 0.236 725 2001 9 4.908 0.108 0.303 705 2001 10 4.934 0.090 0.242 622 2001 11 4.959 0.103 0.265 643 2001 12 4.935 0.141 0.398 617 2002 1 4.967 0.155 0.451 657 2002 2 4.952 0.084 0.260 655 2002 3 5.046 0.178 0.420 565 2002 4 5.080 0.151 0.382 682 2002 5 4.974 0.125 0.332 272 2002 6 nan nan nan 0 2002 7 nan nan nan 0 2002 8 nan nan nan 0 2002 9 5.125 0.050 0.109 132 2002 10 5.140 0.024 0.070 718 2002 11 5.156 0.030 0.091 695 2002 12 5.169 0.022 0.069 708 2003 1 5.186 0.032 0.103 578 2003 2 5.174 0.030 0.096 24 2003 3 5.204 0.037 0.084 715 2003 4 5.246 0.071 0.165 697 2003 5 5.240 0.037 0.073 735 2003 6 5.271 0.040 0.086 693 2003 7 5.272 0.039 0.092 682 2003 8 5.283 0.043 0.092 701 2003 9 5.336 0.041 0.105 662 2003 10 5.339 0.042 0.089 696 2003 11 5.365 0.040 0.092 693 2003 12 5.378 0.040 0.094 732 2004 1 5.352 0.041 0.096 728 2004 2 5.375 0.038 0.091 662 2004 3 5.392 0.038 0.093 677 2004 4 5.438 0.045 0.134 712 2004 5 5.472 0.047 0.118 679 2004 6 5.493 0.042 0.096 684 2004 7 5.530 0.047 0.109 645 2004 8 5.503 0.046 0.101 601 2004 9 5.562 0.046 0.107 661 2004 10 5.563 0.046 0.106 700 2004 11 5.597 0.044 0.118 711 2004 12 5.597 0.044 0.105 684 2005 1 5.601 0.041 0.106 660 2005 2 5.632 0.045 0.120 641 2005 3 5.683 0.046 0.136 711 2005 4 5.679 0.046 0.127 687 2005 5 5.694 0.057 0.137 700 2005 6 5.726 0.051 0.133 681 2005 7 5.714 0.056 0.142 708 2005 8 5.734 0.052 0.149 717 2005 9 5.751 0.033 0.098 713 2005 10 5.779 0.029 0.085 718 2005 11 5.784 0.028 0.080 715 2005 12 5.829 0.036 0.091 602 2006 1 5.858 0.043 0.096 708 2006 2 5.879 0.050 0.103 608 2006 3 5.883 0.045 0.104 716 2006 4 5.956 0.046 0.111 700 2006 5 5.960 0.051 0.119 695 2006 6 5.964 0.047 0.113 650 2006 7 5.970 0.049 0.117 661 2006 8 5.976 0.057 0.110 659 2006 9 6.024 0.042 0.102 534 2006 10 6.040 0.044 0.113 620 2006 11 6.051 0.049 0.141 653 2006 12 6.116 0.052 0.142 686 2007 1 6.128 0.048 0.129 679 2007 2 6.144 0.043 0.123 646 2007 3 6.101 0.035 0.093 417 2007 4 nan nan nan 0 2007 5 6.179 0.038 0.111 612 2007 6 6.209 0.037 0.107 684 2007 7 6.218 0.041 0.118 691 2007 8 6.274 0.044 0.129 607 2007 9 6.277 0.041 0.108 686 2007 10 6.333 0.039 0.121 688 2007 11 6.344 0.038 0.113 621 2007 12 6.353 0.043 0.108 698 2008 1 6.401 0.048 0.129 490 2008 2 6.347 0.024 0.070 71 2008 3 6.377 0.025 0.077 736 2008 4 6.431 0.028 0.091 718 2008 5 6.478 0.026 0.081 725 2008 6 6.496 0.028 0.087 709 2008 7 6.500 0.027 0.087 739 2008 8 6.528 0.029 0.090 732 2008 9 6.526 0.023 0.081 687 2008 10 6.606 0.028 0.086 720 2008 11 6.617 0.029 0.092 711 2008 12 6.624 0.028 0.080 741 2009 1 6.651 0.029 0.086 730 2009 2 6.671 0.024 0.096 667 2009 3 6.721 0.033 0.073 731 2009 4 6.730 0.040 0.081 715 2009 5 6.741 0.043 0.084 739 2009 6 6.774 0.045 0.087 709 2009 7 6.751 0.042 0.076 743 2009 8 6.756 0.045 0.084 743 2009 9 6.816 0.042 0.081 719 2009 10 6.855 0.043 0.078 742 2009 11 6.892 0.042 0.075 719 2009 12 6.847 0.039 0.078 414 2010 1 6.992 0.073 0.146 307 2010 2 6.986 0.055 0.128 672 2010 3 7.016 0.058 0.103 738 2010 4 7.012 0.049 0.102 707 2010 5 7.063 0.053 0.105 735 2010 6 7.125 0.045 0.102 701 2010 7 7.155 0.044 0.106 715 2010 8 7.156 0.044 0.109 635 2010 9 7.218 0.047 0.103 589 2010 10 7.253 0.046 0.100 742 2010 11 7.277 0.048 0.095 715 2010 12 7.236 0.036 0.092 680 2011 1 7.284 0.031 0.079 579 2011 2 7.299 0.029 0.064 671 2011 3 7.294 0.054 0.113 687 2011 4 7.319 0.066 0.120 577 2011 5 7.380 0.028 0.083 743 2011 6 7.402 0.031 0.086 668 2011 7 7.426 0.034 0.082 742 2011 8 7.426 0.034 0.098 738 2011 9 7.481 0.033 0.094 705 2011 10 7.540 0.032 0.102 735 2011 11 7.521 0.034 0.090 683 2011 12 7.543 0.026 0.079 735 2012 1 7.573 0.028 0.110 664 2012 2 7.584 0.058 0.173 687 2012 3 7.605 0.033 0.091 602 2012 4 7.647 0.026 0.073 719 2012 5 7.663 0.023 0.076 721 2012 6 7.661 0.020 0.079 689 2012 7 7.646 0.022 0.072 733 2012 8 7.671 0.022 0.069 737 2012 9 7.727 0.020 0.073 696 2012 10 7.738 0.020 0.069 712 2012 11 7.819 0.023 0.080 707 2012 12 7.805 0.021 0.070 737 2013 1 7.816 0.021 0.074 728 2013 2 7.882 0.024 0.074 321 2013 3 7.885 0.024 0.083 737 2013 4 7.935 0.025 0.106 706 2013 5 8.040 0.025 0.078 724 2013 6 8.013 0.028 0.080 711 2013 7 8.052 0.030 0.093 686 2013 8 8.110 0.026 0.096 430 2013 9 8.155 0.023 0.084 700 2013 10 8.146 0.020 0.071 725 2013 11 8.155 0.023 0.090 719 2013 12 8.209 0.022 0.075 738 2014 1 8.203 0.022 0.072 731 2014 2 8.197 0.021 0.064 665 2014 3 8.284 0.020 0.087 699 2014 4 8.335 0.021 0.070 715 2014 5 8.338 0.021 0.067 658 2014 6 8.381 0.023 0.068 714 2014 7 8.367 0.025 0.078 675 2014 8 8.405 0.021 0.076 587 2014 9 8.482 0.022 0.083 674 2014 10 8.488 0.020 0.141 604 2014 11 8.507 0.016 0.059 702 2014 12 8.520 0.017 0.068 706 2015 1 8.521 0.018 0.059 726 2015 2 8.513 0.019 0.061 654 2015 3 8.553 0.021 0.070 717 2015 4 8.635 0.016 0.072 693 2015 5 8.680 0.022 0.070 728 2015 6 8.659 0.021 0.073 650 2015 7 8.661 0.019 0.062 730 2015 8 8.641 0.022 0.074 664 2015 9 8.778 0.022 0.079 696 2015 10 8.799 0.020 0.081 726 2015 11 8.846 0.021 0.075 703 2015 12 8.873 0.025 0.092 700 2016 1 8.845 0.025 0.090 731 2016 2 8.891 0.028 0.111 690 2016 3 8.898 0.030 0.099 619 2016 4 8.995 0.027 0.115 706 2016 5 9.006 0.029 0.092 739 2016 6 9.028 0.032 0.098 707 2016 7 8.999 0.035 0.097 743 2016 8 9.008 0.033 0.107 713 2016 9 9.065 0.053 0.164 673 2016 10 9.132 0.068 0.170 686 2016 11 9.192 0.048 0.162 711 2016 12 9.136 0.045 0.149 681 2017 1 9.193 0.052 0.147 680 2017 2 9.183 0.048 0.147 644 2017 3 9.189 0.049 0.126 713 2017 4 9.271 0.052 0.144 711 2017 5 9.313 0.048 0.136 743 2017 6 9.332 0.050 0.141 711 2017 7 9.355 0.048 0.142 572 2017 8 9.412 0.041 0.115 743 2017 9 9.504 0.039 0.117 712 2017 10 9.533 0.045 0.142 725 2017 11 9.551 0.044 0.131 714 2017 12 9.565 0.038 0.117 718 2018 1 9.583 0.043 0.119 734 2018 2 9.578 0.043 0.108 656 2018 3 9.628 0.046 0.127 720 2018 4 9.613 0.039 0.120 707 2018 5 9.525 0.152 0.104 93 2018 6 9.722 0.135 0.164 196 2018 7 9.680 0.054 0.142 598 2018 8 9.650 0.044 0.119 699 2018 9 9.733 0.059 0.150 664 2018 10 9.857 0.064 0.172 654 2018 11 9.893 0.054 0.174 698 2018 12 9.887 0.058 0.172 726 2019 1 9.920 0.060 0.191 723 2019 2 9.921 0.087 0.195 229 2019 3 nan nan nan 0 2019 4 nan nan nan 0 2019 5 nan nan nan 0 2019 6 10.078 0.052 0.066 712 2019 7 10.084 0.043 0.064 739 2019 8 10.076 0.043 0.083 700 2019 9 10.141 0.042 0.096 672 2019 10 10.195 0.030 0.052 684 2019 11 10.243 0.036 0.084 709 2019 12 10.243 0.035 0.073 614 2020 1 10.277 0.038 0.073 664 2020 2 10.272 0.040 0.077 691 2020 3 10.280 0.050 0.079 652 2020 4 10.324 0.070 0.096 686 2020 5 10.393 0.082 0.190 714 2020 6 10.392 0.095 0.109 713 2020 7 10.359 0.093 0.126 692 2020 8 10.398 0.063 0.105 721 2020 9 10.456 0.051 0.122 707 2020 10 10.470 0.050 0.117 734 2020 11 10.534 0.056 0.132 335 2020 12 10.531 0.053 0.123 731 2021 1 10.576 0.059 0.110 537 2021 2 10.625 0.055 0.119 655 2021 3 10.712 0.065 0.126 132