# file: nwr_SF6_MM.dat # date: 2023-08-29 # # Sulfur hexafluoride (SF6) data from hourly in situ samples analyzed on a gas chromatograph located # at Niwot Ridge (NWR), Colorado (C-1 site: 40.04 N, 105.54 W, elevation: 3018 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 Sulfur hexafluoride 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: WMO X2014 # 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 SF6 in ppt, uncertainty (unc), std. dev. (sd), number of samples # SF6catsNWRyr SF6catsNWRmon SF6catsNWRm SF6catsNWRunc SF6catsNWRsd SF6catsNWRn 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 nan nan nan 0 1999 8 nan nan nan 0 1999 9 nan nan nan 0 1999 10 nan nan nan 0 1999 11 nan nan nan 0 1999 12 nan nan nan 0 2000 1 nan nan nan 0 2000 2 nan nan nan 0 2000 3 nan nan nan 0 2000 4 nan nan nan 0 2000 5 nan nan nan 0 2000 6 nan nan nan 0 2000 7 nan nan nan 0 2000 8 nan nan nan 0 2000 9 nan nan nan 0 2000 10 nan nan nan 0 2000 11 nan nan nan 0 2000 12 nan nan nan 0 2001 1 4.742 0.198 0.237 353 2001 2 4.786 0.246 0.304 425 2001 3 4.814 0.144 0.198 570 2001 4 4.828 0.191 0.208 695 2001 5 4.830 0.271 0.296 727 2001 6 4.826 0.110 0.172 577 2001 7 4.878 0.096 0.137 718 2001 8 4.912 0.102 0.108 343 2001 9 4.969 0.095 0.085 363 2001 10 4.985 0.105 0.092 384 2001 11 5.012 0.118 0.097 369 2001 12 5.030 0.112 0.076 332 2002 1 5.017 0.094 0.091 403 2002 2 5.038 0.105 0.072 372 2002 3 5.066 0.083 0.074 414 2002 4 5.063 0.067 0.059 385 2002 5 5.113 0.069 0.078 398 2002 6 5.128 0.044 0.070 707 2002 7 5.115 0.042 0.045 707 2002 8 5.144 0.029 0.060 570 2002 9 5.188 0.090 0.096 424 2002 10 5.218 0.045 0.082 720 2002 11 5.200 0.052 0.103 689 2002 12 5.250 0.055 0.107 686 2003 1 5.242 0.038 0.095 641 2003 2 5.267 0.032 0.097 504 2003 3 5.256 0.021 0.087 476 2003 4 5.280 0.023 0.054 706 2003 5 5.291 0.025 0.064 658 2003 6 5.314 0.037 0.082 485 2003 7 5.323 0.053 0.107 579 2003 8 5.419 0.051 0.120 725 2003 9 5.458 0.081 0.162 633 2003 10 5.490 0.087 0.146 635 2003 11 5.473 0.071 0.117 649 2003 12 5.478 0.070 0.123 658 2004 1 5.492 0.084 0.153 673 2004 2 5.536 0.072 0.151 580 2004 3 5.559 0.065 0.128 493 2004 4 5.602 0.061 0.112 458 2004 5 5.574 0.064 0.106 106 2004 6 5.606 0.030 0.090 210 2004 7 5.591 0.054 0.620 488 2004 8 5.648 0.082 0.160 703 2004 9 5.629 0.068 0.154 680 2004 10 5.650 0.029 0.171 607 2004 11 5.685 0.030 0.102 712 2004 12 5.689 0.032 0.068 648 2005 1 nan nan nan 0 2005 2 nan nan nan 0 2005 3 nan nan nan 0 2005 4 nan nan nan 0 2005 5 nan nan nan 0 2005 6 nan nan nan 0 2005 7 nan nan nan 0 2005 8 nan nan nan 0 2005 9 nan nan nan 0 2005 10 6.058 0.181 0.330 283 2005 11 6.034 0.114 0.176 715 2005 12 6.083 0.111 0.178 722 2006 1 6.091 0.175 0.271 695 2006 2 5.948 0.192 0.153 644 2006 3 5.988 0.205 0.396 736 2006 4 6.014 0.225 0.149 672 2006 5 6.087 0.228 0.217 571 2006 6 6.030 0.214 0.181 686 2006 7 6.150 0.252 0.273 178 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 nan nan nan 0 2007 9 nan nan nan 0 2007 10 nan nan nan 0 2007 11 6.448 0.046 0.100 448 2007 12 6.487 0.044 0.084 521 2008 1 6.503 0.039 0.070 726 2008 2 6.523 0.037 0.177 689 2008 3 6.558 0.034 0.072 736 2008 4 6.601 0.027 0.065 718 2008 5 6.618 0.024 0.102 728 2008 6 6.641 0.025 0.089 722 2008 7 6.632 0.021 0.174 743 2008 8 6.685 0.019 0.526 694 2008 9 6.725 0.015 0.286 705 2008 10 6.754 0.020 0.111 738 2008 11 6.773 0.021 0.418 645 2008 12 6.794 0.025 0.180 746 2009 1 6.798 0.023 0.064 733 2009 2 6.824 0.023 0.104 644 2009 3 6.870 0.019 0.137 736 2009 4 6.886 0.017 0.201 681 2009 5 6.905 0.015 0.188 739 2009 6 6.912 0.015 0.069 722 2009 7 6.898 0.014 0.089 729 2009 8 6.952 0.016 0.104 742 2009 9 6.998 0.014 0.097 687 2009 10 7.020 0.019 0.061 640 2009 11 7.025 0.024 0.070 670 2009 12 7.079 0.028 0.096 593 2010 1 7.087 0.026 0.060 621 2010 2 7.149 0.032 0.115 547 2010 3 7.160 0.029 0.093 564 2010 4 7.191 0.026 0.057 410 2010 5 7.218 0.025 0.089 485 2010 6 7.204 0.023 0.055 153 2010 7 7.218 0.017 0.065 586 2010 8 7.219 0.019 0.071 734 2010 9 7.275 0.018 0.086 705 2010 10 7.326 0.022 0.067 737 2010 11 7.340 0.025 0.064 717 2010 12 7.346 0.021 0.072 687 2011 1 7.371 0.026 0.083 722 2011 2 7.397 0.025 0.056 656 2011 3 7.435 0.021 0.063 740 2011 4 7.493 0.022 0.080 711 2011 5 7.534 0.019 0.086 737 2011 6 7.524 0.015 0.073 571 2011 7 7.430 0.019 0.058 733 2011 8 7.455 0.016 0.063 745 2011 9 7.577 0.017 0.067 718 2011 10 7.593 0.022 0.072 735 2011 11 7.634 0.028 0.063 594 2011 12 7.666 0.026 0.065 653 2012 1 7.666 0.030 0.085 362 2012 2 7.784 0.031 0.096 26 2012 3 7.732 0.023 0.068 472 2012 4 7.766 0.019 0.072 713 2012 5 7.816 0.016 0.093 732 2012 6 7.788 0.018 0.065 641 2012 7 7.783 0.016 0.068 618 2012 8 7.848 0.017 0.105 742 2012 9 7.894 0.017 0.075 718 2012 10 7.919 0.021 0.112 685 2012 11 7.943 0.021 0.060 722 2012 12 7.985 0.026 0.107 733 2013 1 7.982 0.023 0.078 718 2013 2 8.043 0.024 0.111 626 2013 3 8.025 0.021 0.077 746 2013 4 8.083 0.019 0.141 716 2013 5 8.129 0.018 0.075 446 2013 6 8.144 0.019 0.107 717 2013 7 8.131 0.016 0.128 738 2013 8 8.136 0.017 0.119 742 2013 9 8.175 0.022 0.112 692 2013 10 8.243 0.027 0.100 740 2013 11 8.248 0.031 0.074 710 2013 12 8.281 0.040 0.091 728 2014 1 8.313 0.035 0.101 242 2014 2 8.320 0.026 0.057 414 2014 3 8.366 0.022 0.076 349 2014 4 8.404 0.024 0.096 544 2014 5 8.417 0.028 0.072 587 2014 6 8.463 0.018 0.662 680 2014 7 8.478 0.034 0.126 502 2014 8 8.505 0.023 0.089 509 2014 9 8.533 0.026 0.129 616 2014 10 8.565 0.030 0.147 738 2014 11 8.580 0.039 0.121 713 2014 12 8.610 0.041 0.131 722 2015 1 8.578 0.033 0.050 113 2015 2 8.688 0.030 0.121 195 2015 3 8.668 0.023 0.108 746 2015 4 8.707 0.022 0.187 713 2015 5 8.745 0.019 0.119 647 2015 6 nan nan nan 0 2015 7 nan nan nan 0 2015 8 8.833 0.017 0.193 516 2015 9 8.878 0.042 0.191 687 2015 10 8.903 0.044 0.148 712 2015 11 8.951 0.048 0.150 557 2015 12 8.959 0.050 0.230 710 2016 1 8.984 0.061 0.184 723 2016 2 8.999 0.056 0.115 617 2016 3 9.034 0.047 0.194 696 2016 4 9.079 0.050 0.186 687 2016 5 9.107 0.066 0.257 738 2016 6 9.121 0.037 0.180 716 2016 7 9.091 0.025 0.092 696 2016 8 9.147 0.026 0.110 660 2016 9 9.161 0.039 0.109 697 2016 10 9.184 0.047 0.085 746 2016 11 9.257 0.053 0.168 650 2016 12 9.275 0.023 0.089 712 2017 1 9.282 0.027 0.079 656 2017 2 9.278 0.047 0.093 546 2017 3 9.312 0.080 0.142 509 2017 4 9.408 0.063 0.126 355 2017 5 9.452 0.118 0.262 340 2017 6 9.436 0.054 0.179 342 2017 7 9.422 0.018 0.129 196 2017 8 9.461 0.039 0.144 283 2017 9 9.508 0.028 0.232 699 2017 10 9.536 0.064 0.155 736 2017 11 9.600 0.087 0.198 702 2017 12 9.643 0.074 0.224 680 2018 1 9.647 0.067 0.155 729 2018 2 9.693 0.045 0.109 652 2018 3 9.711 0.085 0.138 734 2018 4 9.773 0.102 0.219 709 2018 5 9.848 0.094 0.237 739 2018 6 9.825 0.039 0.114 648 2018 7 9.822 0.039 0.171 341 2018 8 9.844 0.029 0.101 733 2018 9 9.842 0.043 0.114 522 2018 10 nan nan nan 0 2018 11 nan nan nan 0 2018 12 nan nan nan 0 2019 1 nan nan nan 0 2019 2 nan nan nan 0 2019 3 nan nan nan 0 2019 4 nan nan nan 0 2019 5 nan nan nan 0 2019 6 nan nan nan 0 2019 7 10.113 0.036 0.065 482 2019 8 10.159 0.032 0.080 633 2019 9 10.197 0.063 0.075 439 2019 10 10.206 0.071 0.080 155 2019 11 10.249 0.090 0.079 91 2019 12 10.281 0.078 0.117 576 2020 1 10.302 0.078 0.107 712 2020 2 10.314 0.063 0.102 65 2020 3 nan nan nan 0 2020 4 nan nan nan 0 2020 5 10.442 0.055 0.110 269 2020 6 10.453 0.047 0.069 499 2020 7 10.405 0.035 0.081 637 2020 8 10.435 0.036 0.074 707 2020 9 10.554 0.051 0.102 389 2020 10 10.557 0.082 0.131 684 2020 11 10.562 0.100 0.153 704 2020 12 10.588 0.110 0.190 580 2021 1 10.617 0.119 0.196 671 2021 2 10.656 0.098 0.177 656 2021 3 10.699 0.080 0.154 578 2021 4 10.740 0.068 0.137 525 2021 5 10.815 0.073 0.151 370 2021 6 nan nan nan 0 2021 7 10.786 0.040 0.080 311 2021 8 10.774 0.044 0.075 66 2021 9 10.885 0.092 0.159 329 2021 10 10.933 0.123 0.187 702 2021 11 10.964 0.086 0.112 617 2021 12 11.066 0.045 0.080 462 2022 1 11.074 0.029 0.044 622 2022 2 11.096 0.029 0.049 673 2022 3 11.134 0.025 0.060 426 2022 4 11.186 0.033 0.053 333 2022 5 11.201 0.043 0.088 323 2022 6 11.209 0.052 0.102 347 2022 7 11.182 0.043 0.107 205 2022 8 11.210 0.060 0.116 623 2022 9 11.209 0.054 0.101 696 2022 10 11.273 0.041 0.062 665 2022 11 11.286 0.032 0.044 706 2022 12 11.309 0.034 0.046 666 2023 1 11.321 0.027 0.050 589 2023 2 11.326 0.041 0.051 334 2023 3 11.375 0.038 0.071 501 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