# file: smo_CCl4_MM.dat # date: 2023-08-29 # # Carbon tetrachloride (CCl4) data from hourly in situ samples analyzed on a gas chromatograph located # at Cape Matatulu (SMO), American Samoa (14.3 S, 170.6 W, elevation: 77 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 Carbon tetrachloride 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 2008 # 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 CCl4 in ppt, uncertainty (unc), std. dev. (sd), number of samples # CCl4catsSMOyr CCl4catsSMOmon CCl4catsSMOm CCl4catsSMOunc CCl4catsSMOsd CCl4catsSMOn 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 12 101.72 0.22 0.31 508 1999 1 101.76 0.22 0.32 632 1999 2 101.69 0.19 0.29 626 1999 3 101.22 0.22 0.25 662 1999 4 101.19 0.29 0.23 535 1999 5 101.08 0.22 0.40 530 1999 6 100.89 0.23 0.41 659 1999 7 100.67 0.27 0.26 629 1999 8 100.55 0.28 0.21 527 1999 9 100.11 0.27 0.33 633 1999 10 100.03 0.29 0.28 614 1999 11 100.19 0.25 0.30 674 1999 12 100.21 0.27 0.33 705 2000 1 100.32 0.31 0.23 710 2000 2 99.88 0.25 0.44 673 2000 3 99.86 0.40 0.44 680 2000 4 99.53 0.39 0.38 689 2000 5 99.14 0.42 0.36 577 2000 6 98.81 0.45 0.36 408 2000 7 98.90 0.52 0.36 687 2000 8 98.78 0.58 0.37 634 2000 9 98.71 0.58 0.38 705 2000 10 98.75 0.71 0.41 709 2000 11 98.70 0.23 0.28 569 2000 12 98.92 0.19 0.41 703 2001 1 98.89 0.20 0.25 509 2001 2 98.99 0.26 0.41 500 2001 3 98.76 0.26 0.41 684 2001 4 98.52 0.20 0.31 494 2001 5 97.96 0.20 0.27 607 2001 6 98.09 0.21 0.23 509 2001 7 97.80 0.19 0.34 492 2001 8 97.91 0.20 0.29 646 2001 9 97.58 0.21 0.38 649 2001 10 97.92 0.21 0.56 526 2001 11 97.70 0.22 0.35 636 2001 12 97.46 0.25 0.43 693 2002 1 97.73 0.28 0.29 666 2002 2 97.57 0.17 0.27 560 2002 3 97.53 0.16 0.25 696 2002 4 97.23 0.19 0.27 707 2002 5 97.02 0.21 0.29 381 2002 6 96.87 0.33 0.37 648 2002 7 96.77 0.23 0.37 441 2002 8 96.68 0.17 0.35 332 2002 9 96.50 0.18 0.29 405 2002 10 96.70 0.29 0.32 536 2002 11 96.93 0.32 0.43 390 2002 12 96.89 0.23 0.41 639 2003 1 97.09 0.22 0.38 375 2003 2 96.70 0.20 0.47 562 2003 3 97.13 0.30 0.45 468 2003 4 96.83 0.29 0.48 652 2003 5 96.66 0.25 0.41 131 2003 6 nan nan nan 0 2003 7 96.36 0.31 0.28 569 2003 8 96.41 0.28 0.30 668 2003 9 96.11 0.30 0.36 658 2003 10 96.00 0.29 0.43 632 2003 11 96.04 0.23 0.36 495 2003 12 96.11 0.59 0.15 315 2004 1 95.62 0.68 0.45 356 2004 2 95.72 0.65 0.18 640 2004 3 95.79 0.49 0.26 596 2004 4 95.60 0.41 0.33 663 2004 5 95.87 0.39 0.33 698 2004 6 95.17 0.47 0.25 655 2004 7 95.23 0.37 0.17 694 2004 8 95.13 0.50 0.28 667 2004 9 94.98 0.63 0.42 660 2004 10 95.09 0.64 0.44 684 2004 11 95.12 0.71 0.49 660 2004 12 95.37 0.60 0.55 659 2005 1 95.33 0.54 0.40 655 2005 2 94.96 0.38 0.37 546 2005 3 95.19 0.58 0.50 693 2005 4 94.94 0.70 0.63 654 2005 5 94.17 0.50 0.53 701 2005 6 94.36 0.24 0.27 364 2005 7 93.65 0.31 0.27 70 2005 8 93.99 0.21 0.14 138 2005 9 94.12 0.26 0.23 651 2005 10 94.10 0.23 0.29 726 2005 11 94.06 0.25 0.24 566 2005 12 94.05 0.25 0.25 697 2006 1 93.96 0.24 0.28 599 2006 2 94.08 0.25 0.26 612 2006 3 93.69 0.28 0.24 606 2006 4 93.48 0.31 0.24 321 2006 5 93.36 0.27 0.35 561 2006 6 93.29 0.23 0.26 655 2006 7 93.03 0.23 0.28 583 2006 8 92.78 0.28 0.25 683 2006 9 92.99 0.31 0.29 626 2006 10 92.87 0.34 0.31 569 2006 11 92.75 0.30 0.27 530 2006 12 92.95 0.28 0.31 661 2007 1 92.68 0.30 0.28 618 2007 2 93.08 0.29 0.23 561 2007 3 92.90 0.28 0.24 699 2007 4 92.63 0.26 0.27 690 2007 5 92.43 0.32 0.21 555 2007 6 91.95 0.27 0.25 652 2007 7 91.80 0.27 0.23 735 2007 8 91.60 0.29 0.30 691 2007 9 91.72 0.27 0.26 670 2007 10 91.68 0.27 0.31 641 2007 11 91.64 0.28 0.34 645 2007 12 91.45 0.25 0.33 684 2008 1 91.54 0.29 0.33 590 2008 2 91.35 0.29 0.28 638 2008 3 91.06 0.30 0.32 689 2008 4 90.99 0.30 0.30 665 2008 5 90.79 0.28 0.32 674 2008 6 90.57 0.29 0.32 646 2008 7 90.26 0.31 0.33 688 2008 8 90.03 0.31 0.24 681 2008 9 89.92 0.30 0.31 656 2008 10 89.67 0.35 0.25 652 2008 11 89.72 0.35 0.32 633 2008 12 89.92 0.32 0.35 683 2009 1 89.84 0.34 0.32 632 2009 2 89.68 0.35 0.33 617 2009 3 89.57 0.35 0.32 623 2009 4 89.41 0.35 0.29 591 2009 5 89.14 0.34 0.27 649 2009 6 89.06 0.37 0.45 494 2009 7 88.92 0.42 0.45 529 2009 8 89.03 0.46 0.39 620 2009 9 88.70 0.73 0.50 554 2009 10 88.74 0.80 0.52 431 2009 11 88.78 0.49 0.56 676 2009 12 88.58 0.52 0.52 680 2010 1 88.59 0.56 0.48 633 2010 2 88.18 0.43 0.41 533 2010 3 88.27 0.50 0.49 670 2010 4 88.33 0.53 0.50 199 2010 5 nan nan nan 0 2010 6 88.21 0.56 0.41 46 2010 7 88.35 0.56 0.53 229 2010 8 87.91 0.55 0.47 209 2010 9 87.81 0.52 0.53 343 2010 10 88.16 0.60 0.60 303 2010 11 88.20 0.54 0.70 264 2010 12 87.56 0.54 0.55 89 2011 1 87.61 0.53 0.47 241 2011 2 87.08 0.48 0.36 296 2011 3 86.99 0.57 0.45 331 2011 4 87.14 0.49 0.35 321 2011 5 87.06 0.50 0.42 322 2011 6 86.97 0.38 0.29 336 2011 7 87.25 0.46 0.51 371 2011 8 86.64 0.51 0.58 696 2011 9 87.11 0.58 0.63 685 2011 10 86.75 0.62 0.62 631 2011 11 86.54 0.55 0.50 696 2011 12 86.48 0.57 0.62 724 2012 1 86.41 0.61 0.65 714 2012 2 86.66 0.71 0.69 671 2012 3 86.57 0.83 0.84 457 2012 4 86.17 0.47 0.57 295 2012 5 86.14 0.42 0.32 67 2012 6 86.07 0.46 0.48 475 2012 7 85.89 0.37 0.43 443 2012 8 85.73 0.38 0.31 618 2012 9 85.55 0.70 0.44 453 2012 10 85.62 0.99 0.42 341 2012 11 85.61 0.48 0.39 645 2012 12 85.60 0.42 0.35 506 2013 1 85.63 0.42 0.49 725 2013 2 85.51 0.44 0.51 598 2013 3 85.71 0.54 0.44 127 2013 4 nan nan nan 0 2013 5 85.13 0.66 0.50 511 2013 6 84.79 0.67 0.49 620 2013 7 84.67 0.55 0.47 510 2013 8 84.84 0.41 0.44 624 2013 9 84.52 0.46 0.45 679 2013 10 84.32 0.50 0.48 707 2013 11 84.24 0.50 0.43 688 2013 12 84.22 0.52 0.45 712 2014 1 84.21 0.53 0.56 694 2014 2 84.29 0.41 0.48 626 2014 3 84.38 0.53 0.47 352 2014 4 83.79 0.72 0.49 334 2014 5 83.60 0.79 0.49 344 2014 6 83.48 0.78 0.55 217 2014 7 nan nan nan 0 2014 8 nan nan nan 0 2014 9 82.98 0.47 0.35 142 2014 10 82.83 0.42 0.39 684 2014 11 82.85 0.45 0.38 672 2014 12 82.65 0.50 0.38 638 2015 1 83.01 0.50 0.41 621 2015 2 82.95 0.43 0.39 590 2015 3 82.83 0.48 0.42 708 2015 4 82.62 0.38 0.35 691 2015 5 82.26 0.38 0.34 593 2015 6 81.52 0.32 0.38 130 2015 7 81.53 0.40 0.40 427 2015 8 81.38 0.35 0.40 349 2015 9 81.37 0.35 0.39 606 2015 10 81.19 0.33 0.36 617 2015 11 81.29 0.32 0.38 654 2015 12 81.29 0.28 0.41 605 2016 1 81.28 0.31 0.41 711 2016 2 81.29 0.31 0.42 669 2016 3 81.29 0.33 0.42 479 2016 4 81.04 0.33 0.49 590 2016 5 80.84 0.37 0.53 564 2016 6 80.58 0.31 0.38 608 2016 7 80.52 0.31 0.34 262 2016 8 nan nan nan 0 2016 9 80.89 0.31 0.31 202 2016 10 80.70 0.28 0.38 269 2016 11 80.63 0.28 0.36 314 2016 12 80.73 0.29 0.40 344 2017 1 80.77 0.34 0.42 325 2017 2 80.78 0.33 0.42 579 2017 3 80.40 0.31 0.45 679 2017 4 80.15 0.29 0.48 642 2017 5 79.91 0.33 0.42 702 2017 6 80.14 0.41 0.45 56 2017 7 nan nan nan 0 2017 8 79.54 0.25 0.30 300 2017 9 79.58 0.28 0.27 348 2017 10 79.56 0.28 0.32 353 2017 11 79.69 0.27 0.27 187 2017 12 nan nan nan 0 2018 1 nan nan nan 0 2018 2 79.58 0.34 0.31 43 2018 3 79.36 0.51 0.45 184 2018 4 79.22 0.51 0.49 345 2018 5 79.12 0.50 0.52 362 2018 6 79.04 0.48 0.45 343 2018 7 79.21 0.42 0.50 355 2018 8 nan nan nan 0 2018 9 78.21 1.29 0.30 22 2018 10 78.65 0.50 0.46 231 2018 11 78.66 0.47 0.45 347 2018 12 78.57 0.55 0.41 280 2019 1 78.25 1.16 0.59 136 2019 2 79.04 0.55 0.63 149 2019 3 79.06 0.48 0.38 133 2019 4 78.76 0.41 0.25 28 2019 5 78.76 0.36 0.51 385 2019 6 78.55 0.42 0.47 373 2019 7 78.48 0.45 0.61 339 2019 8 78.78 0.46 0.67 468 2019 9 78.60 0.48 0.59 177 2019 10 78.08 0.37 0.33 363 2019 11 77.76 0.38 0.40 303 2019 12 77.28 0.44 0.53 246 2020 1 76.88 0.42 0.50 304 2020 2 76.74 0.33 0.42 183 2020 3 nan nan nan 0 2020 4 77.22 0.32 0.52 179 2020 5 76.90 0.33 0.46 699 2020 6 76.68 0.36 0.42 651 2020 7 76.87 0.34 0.54 324 2020 8 nan nan nan 0 2020 9 nan nan nan 0 2020 10 76.89 1.03 0.66 109 2020 11 77.22 0.83 0.58 28 2020 12 76.59 0.50 0.53 148 2021 1 76.19 0.61 0.53 177 2021 2 76.19 0.59 0.59 203 2021 3 76.30 0.73 0.74 244 2021 4 75.93 0.37 0.65 93 2021 5 76.37 0.30 0.47 150 2021 6 76.14 0.28 0.47 328 2021 7 75.99 0.25 0.48 367 2021 8 76.10 0.26 0.47 377 2021 9 75.49 0.25 0.43 671 2021 10 75.29 0.25 0.47 733 2021 11 75.26 0.24 0.47 651 2021 12 75.36 0.24 0.45 707 2022 1 75.54 0.17 0.39 41 2022 2 nan nan nan 0 2022 3 nan nan nan 0 2022 4 nan nan nan 0 2022 5 nan nan nan 0 2022 6 nan nan nan 0 2022 7 nan nan nan 0 2022 8 nan nan nan 0 2022 9 74.40 0.13 0.21 300 2022 10 74.45 0.14 0.25 735 2022 11 74.42 0.30 0.20 118 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