# file: spo_CCl4_MM.dat # date: 2024-02-09 # # Carbon tetrachloride (CCl4) data from hourly in situ samples analyzed on a gas chromatograph located # at South Pole (SPO) station Antarctica (89.98 S, 24.80 W, elevation: 2810 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 (2024), # Global Atmospheric Carbon tetrachloride Dry Air Mole Fractions from the # NOAA GML Halocarbons in situ Network, 1998-2024, Version: 2024-02-09, # 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 # CCl4catsSPOyr CCl4catsSPOmon CCl4catsSPOm CCl4catsSPOunc CCl4catsSPOsd CCl4catsSPOn 1998 1 nan nan nan 0 1998 2 101.74 0.48 0.38 168 1998 3 101.57 0.27 0.36 273 1998 4 101.60 0.21 0.56 296 1998 5 101.69 0.18 0.58 335 1998 6 101.43 0.16 0.39 326 1998 7 101.31 0.18 0.41 269 1998 8 101.29 0.23 0.39 167 1998 9 101.39 0.27 0.52 280 1998 10 101.34 0.19 0.50 350 1998 11 100.99 0.20 0.49 370 1998 12 100.67 0.14 0.50 433 1999 1 100.65 0.18 0.43 332 1999 2 100.32 0.14 0.38 275 1999 3 100.22 0.19 0.37 314 1999 4 100.13 0.15 0.32 117 1999 5 100.50 0.18 0.37 431 1999 6 100.24 0.16 0.32 643 1999 7 100.17 0.39 0.41 623 1999 8 100.01 0.57 0.41 541 1999 9 99.81 0.37 0.45 431 1999 10 99.72 0.23 0.34 555 1999 11 99.46 0.13 0.36 636 1999 12 99.43 0.13 0.41 622 2000 1 99.40 0.19 0.33 438 2000 2 99.22 0.36 0.42 489 2000 3 98.89 0.39 0.38 596 2000 4 98.65 0.37 0.34 616 2000 5 98.60 0.24 0.35 681 2000 6 98.48 0.30 0.31 509 2000 7 98.42 0.34 0.33 511 2000 8 98.46 0.45 0.43 548 2000 9 98.48 0.41 0.39 595 2000 10 98.26 0.51 0.50 646 2000 11 98.18 0.45 0.36 472 2000 12 98.16 0.42 0.29 303 2001 1 98.16 0.32 0.29 553 2001 2 98.07 0.43 0.34 347 2001 3 98.13 0.51 0.32 68 2001 4 97.67 0.34 0.37 616 2001 5 97.51 0.38 0.36 674 2001 6 97.61 0.40 0.34 601 2001 7 97.53 0.42 0.37 579 2001 8 97.46 0.36 0.41 376 2001 9 97.17 0.55 0.51 436 2001 10 97.19 0.58 0.59 301 2001 11 96.86 0.20 0.38 541 2001 12 96.91 0.17 0.32 511 2002 1 96.89 0.20 0.32 505 2002 2 96.84 0.29 0.33 197 2002 3 96.62 0.16 0.32 606 2002 4 96.51 0.17 0.32 513 2002 5 96.47 0.24 0.41 553 2002 6 96.28 0.25 0.43 486 2002 7 96.27 0.24 0.37 444 2002 8 96.03 0.18 0.37 588 2002 9 95.75 0.26 0.42 413 2002 10 95.70 0.27 0.42 460 2002 11 95.60 0.22 0.36 207 2002 12 95.52 0.31 0.51 585 2003 1 95.61 0.45 0.41 80 2003 2 95.61 0.19 0.32 521 2003 3 95.53 0.28 0.36 673 2003 4 95.52 0.25 0.37 588 2003 5 95.46 0.23 0.40 664 2003 6 95.51 0.31 0.52 674 2003 7 95.49 0.29 0.49 647 2003 8 95.49 0.27 0.45 692 2003 9 95.43 0.29 0.48 651 2003 10 95.26 0.28 0.49 499 2003 11 95.21 0.29 0.48 439 2003 12 94.98 0.36 0.49 473 2004 1 95.15 0.42 0.45 458 2004 2 94.95 0.37 0.46 606 2004 3 94.75 0.26 0.38 650 2004 4 94.66 0.30 0.49 654 2004 5 94.54 0.34 0.50 606 2004 6 94.37 0.52 0.50 543 2004 7 94.30 0.38 0.59 452 2004 8 94.32 0.37 0.51 221 2004 9 nan nan nan 0 2004 10 94.10 0.40 0.70 672 2004 11 94.03 0.36 0.65 399 2004 12 94.16 0.40 0.79 607 2005 1 94.05 0.47 0.77 680 2005 2 93.69 0.59 0.75 508 2005 3 93.68 0.74 0.75 187 2005 4 93.52 0.75 0.79 398 2005 5 93.32 0.53 0.56 512 2005 6 93.21 0.68 0.79 358 2005 7 93.30 0.48 0.95 657 2005 8 93.10 0.48 0.96 609 2005 9 92.84 0.43 0.77 640 2005 10 92.87 0.45 0.79 665 2005 11 92.94 0.41 0.67 670 2005 12 92.93 0.64 0.75 521 2006 1 92.72 0.80 0.75 541 2006 2 92.52 0.47 0.82 639 2006 3 92.33 0.33 0.53 715 2006 4 92.09 0.26 0.42 691 2006 5 91.99 0.33 0.50 679 2006 6 91.86 0.32 0.50 680 2006 7 91.87 0.43 0.52 707 2006 8 91.78 0.42 0.47 696 2006 9 91.69 0.42 0.45 674 2006 10 91.61 0.38 0.42 733 2006 11 91.51 0.36 0.39 644 2006 12 91.51 0.32 0.37 648 2007 1 91.44 0.36 0.40 618 2007 2 91.24 0.37 0.41 576 2007 3 91.13 0.37 0.37 634 2007 4 90.94 0.46 0.42 574 2007 5 90.88 0.33 0.47 716 2007 6 90.73 0.29 0.45 688 2007 7 90.61 0.25 0.47 715 2007 8 90.55 0.30 0.49 692 2007 9 90.58 0.29 0.54 672 2007 10 90.45 0.24 0.45 712 2007 11 90.36 0.25 0.48 690 2007 12 90.20 0.22 0.43 699 2008 1 89.94 0.27 0.57 679 2008 2 90.06 0.26 0.51 668 2008 3 89.96 0.24 0.45 712 2008 4 89.91 0.27 0.49 680 2008 5 89.76 0.25 0.51 706 2008 6 89.77 0.26 0.58 694 2008 7 89.70 0.25 0.54 711 2008 8 89.57 0.25 0.54 653 2008 9 89.35 0.27 0.55 691 2008 10 89.28 0.29 0.53 713 2008 11 89.04 0.27 0.56 685 2008 12 88.82 0.21 0.50 706 2009 1 88.69 0.26 0.58 644 2009 2 88.81 0.24 0.32 669 2009 3 88.47 0.19 0.30 714 2009 4 88.33 0.17 0.33 679 2009 5 88.16 0.19 0.34 728 2009 6 87.99 0.17 0.36 700 2009 7 87.88 0.16 0.30 718 2009 8 87.77 0.16 0.36 690 2009 9 87.65 0.20 0.33 693 2009 10 87.59 0.20 0.33 693 2009 11 87.55 0.19 0.32 699 2009 12 87.57 0.16 0.37 709 2010 1 87.47 0.15 0.34 709 2010 2 87.29 0.19 0.32 632 2010 3 87.17 0.20 0.29 699 2010 4 86.96 0.22 0.34 676 2010 5 86.76 0.23 0.35 691 2010 6 86.73 0.24 0.38 672 2010 7 86.68 0.28 0.40 686 2010 8 86.46 0.25 0.41 699 2010 9 86.61 0.24 0.47 676 2010 10 86.64 0.22 0.35 635 2010 11 86.57 0.21 0.46 646 2010 12 86.64 0.21 0.34 640 2011 1 86.67 0.21 0.38 724 2011 2 86.54 0.28 0.34 631 2011 3 86.29 0.22 0.35 716 2011 4 86.19 0.24 0.36 687 2011 5 86.08 0.22 0.38 696 2011 6 86.14 0.24 0.49 689 2011 7 86.17 0.25 0.55 660 2011 8 86.05 0.23 0.46 382 2011 9 85.85 0.27 0.44 348 2011 10 85.67 0.25 0.43 349 2011 11 85.80 0.26 0.45 531 2011 12 85.62 0.26 0.44 702 2012 1 85.59 0.23 0.41 560 2012 2 85.60 0.24 0.43 543 2012 3 85.48 0.41 0.45 215 2012 4 85.24 0.65 0.48 407 2012 5 85.06 0.56 0.40 531 2012 6 85.13 0.28 0.48 330 2012 7 84.83 0.24 0.48 461 2012 8 84.96 0.41 0.50 567 2012 9 84.82 0.53 0.54 568 2012 10 84.57 0.25 0.45 686 2012 11 84.48 0.23 0.46 670 2012 12 84.66 0.25 0.58 694 2013 1 84.68 0.23 0.61 646 2013 2 84.36 0.29 0.60 592 2013 3 84.09 0.26 0.49 704 2013 4 83.96 0.27 0.52 662 2013 5 83.91 0.27 0.53 711 2013 6 83.73 0.26 0.57 681 2013 7 83.71 0.25 0.51 671 2013 8 83.50 0.23 0.38 707 2013 9 83.48 0.24 0.49 656 2013 10 83.37 0.27 0.62 663 2013 11 83.30 0.28 0.48 632 2013 12 83.40 0.24 0.53 670 2014 1 83.27 0.21 0.47 691 2014 2 82.90 0.27 0.42 633 2014 3 82.78 0.31 0.41 704 2014 4 82.64 0.27 0.41 656 2014 5 82.51 0.26 0.41 718 2014 6 82.46 0.25 0.41 651 2014 7 82.40 0.24 0.44 694 2014 8 82.29 0.26 0.44 689 2014 9 82.18 0.25 0.42 682 2014 10 82.09 0.26 0.44 650 2014 11 82.05 0.27 0.46 643 2014 12 82.00 0.25 0.48 653 2015 1 81.92 0.26 0.44 446 2015 2 81.73 0.27 0.47 616 2015 3 81.22 0.24 0.44 685 2015 4 81.23 0.22 0.44 642 2015 5 81.13 0.24 0.43 652 2015 6 81.05 0.24 0.45 637 2015 7 80.99 0.26 0.54 647 2015 8 80.95 0.23 0.47 633 2015 9 80.88 0.24 0.46 625 2015 10 80.86 0.28 0.47 700 2015 11 80.88 0.26 0.47 662 2015 12 80.86 0.21 0.46 655 2016 1 80.88 0.24 0.47 685 2016 2 80.86 0.26 0.43 663 2016 3 80.71 0.24 0.41 662 2016 4 80.56 0.24 0.50 569 2016 5 80.63 0.26 0.49 683 2016 6 80.39 0.26 0.47 679 2016 7 80.14 0.26 0.54 687 2016 8 80.06 0.27 0.51 708 2016 9 79.94 0.28 0.53 673 2016 10 79.80 0.26 0.51 714 2016 11 79.76 0.27 0.45 693 2016 12 79.14 0.26 0.48 612 2017 1 78.92 0.24 0.44 687 2017 2 78.81 0.30 0.44 629 2017 3 78.76 0.34 0.46 666 2017 4 78.67 0.32 0.45 681 2017 5 78.61 0.28 0.41 732 2017 6 78.61 0.30 0.40 670 2017 7 78.49 0.28 0.39 707 2017 8 78.46 0.29 0.42 663 2017 9 78.35 0.26 0.39 670 2017 10 78.31 0.24 0.37 532 2017 11 78.23 0.22 0.38 675 2017 12 78.34 0.29 0.42 581 2018 1 78.27 0.25 0.43 680 2018 2 78.35 0.30 0.37 134 2018 3 78.20 0.45 0.46 679 2018 4 78.10 0.48 0.44 658 2018 5 78.15 0.41 0.45 691 2018 6 77.76 0.45 0.51 636 2018 7 77.44 0.53 0.46 652 2018 8 77.40 0.41 0.44 679 2018 9 77.31 0.39 0.44 680 2018 10 77.30 0.40 0.45 683 2018 11 77.26 0.30 0.42 604 2018 12 77.21 0.25 0.45 679 2019 1 77.15 0.27 0.43 663 2019 2 77.03 0.28 0.43 610 2019 3 77.26 0.31 0.47 705 2019 4 77.08 0.30 0.46 623 2019 5 77.06 0.30 0.43 686 2019 6 77.09 0.24 0.43 663 2019 7 77.01 0.30 0.46 690 2019 8 77.17 0.31 0.50 679 2019 9 76.78 0.30 0.46 680 2019 10 76.60 0.30 0.46 716 2019 11 76.70 0.28 0.44 669 2019 12 76.46 0.25 0.47 702 2020 1 76.27 0.27 0.47 609 2020 2 76.12 0.30 0.46 670 2020 3 75.97 0.26 0.41 710 2020 4 75.90 0.29 0.42 716 2020 5 75.79 0.26 0.44 727 2020 6 75.88 0.30 0.49 695 2020 7 75.85 0.32 0.49 699 2020 8 75.98 0.29 0.46 709 2020 9 75.85 0.29 0.44 695 2020 10 75.79 0.32 0.41 715 2020 11 75.80 0.30 0.45 689 2020 12 75.74 0.23 0.42 677 2021 1 75.65 0.26 0.43 721 2021 2 75.80 0.28 0.38 577 2021 3 75.48 0.30 0.39 464 2021 4 75.51 0.27 0.44 687 2021 5 75.38 0.27 0.43 615 2021 6 75.39 0.30 0.46 348 2021 7 74.96 0.28 0.46 668 2021 8 74.92 0.27 0.48 701 2021 9 74.82 0.24 0.43 699 2021 10 74.69 0.23 0.40 728 2021 11 74.75 0.26 0.50 689 2021 12 74.66 0.24 0.44 678 2022 1 nan nan nan 0 2022 2 74.57 0.28 0.36 352 2022 3 74.49 0.23 0.41 723 2022 4 74.30 0.24 0.40 699 2022 5 74.16 0.25 0.41 715 2022 6 74.08 0.26 0.41 702 2022 7 73.93 0.28 0.44 721 2022 8 73.87 0.27 0.40 712 2022 9 73.79 0.25 0.40 699 2022 10 73.72 0.27 0.40 724 2022 11 73.62 0.25 0.41 699 2022 12 73.60 0.18 0.39 470 2023 1 73.65 0.19 0.41 712 2023 2 73.24 0.23 0.44 627 2023 3 73.28 0.21 0.36 583 2023 4 73.10 0.21 0.37 714 2023 5 72.86 0.23 0.38 695 2023 6 72.70 0.24 0.38 697 2023 7 72.46 0.28 0.42 423 2023 8 72.48 0.28 0.40 361 2023 9 72.24 0.28 0.54 628 2023 10 72.31 0.31 0.65 159 2023 11 72.74 0.21 0.50 697 2023 12 72.73 0.24 0.50 637 2024 1 72.65 0.31 0.46 723 2024 2 72.56 0.37 0.45 118