# file: spo_F12_MM.dat # date: 2023-04-13 # # Chloroflurocarbon-12 (F12) 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 (2023), # Global Atmospheric Chloroflurocarbon-12 Dry Air Mole Fractions from the # NOAA GML Halocarbons in situ Network, 1998-2023, Version: 2023-04-13, # 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 F12 in ppt, uncertainty (unc), std. dev. (sd), number of samples # F12catsSPOyr F12catsSPOmon F12catsSPOm F12catsSPOunc F12catsSPOsd F12catsSPOn 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 4 537.04 0.71 0.92 511 2000 5 537.52 0.61 0.90 579 2000 6 537.85 0.56 0.81 479 2000 7 538.01 0.62 0.82 374 2000 8 538.97 0.63 0.74 479 2000 9 nan nan nan 0 2000 10 538.55 0.77 1.15 30 2000 11 539.15 0.91 1.15 209 2000 12 539.07 2.12 1.92 447 2001 1 538.85 2.21 2.25 454 2001 2 538.41 2.29 2.29 313 2001 3 538.94 2.75 1.85 175 2001 4 537.95 2.41 2.32 421 2001 5 537.92 2.67 2.50 409 2001 6 538.67 1.81 1.82 411 2001 7 538.82 1.80 2.09 417 2001 8 539.40 1.77 2.29 285 2001 9 539.42 1.45 1.66 327 2001 10 540.56 2.34 2.19 261 2001 11 540.69 2.85 3.33 426 2001 12 540.90 2.63 3.01 346 2002 1 540.34 4.13 4.21 188 2002 2 540.69 1.04 1.10 261 2002 3 nan nan nan 0 2002 4 540.30 0.60 0.88 61 2002 5 540.16 0.92 1.00 457 2002 6 540.35 1.16 1.09 333 2002 7 540.35 1.30 1.10 180 2002 8 540.28 1.07 1.11 334 2002 9 539.89 0.96 1.01 265 2002 10 540.09 0.66 1.01 335 2002 11 539.79 1.02 1.05 148 2002 12 539.64 0.78 0.97 481 2003 1 539.30 1.03 1.07 452 2003 2 539.18 0.88 0.93 423 2003 3 539.07 0.99 0.99 510 2003 4 539.20 1.28 1.17 448 2003 5 539.47 1.11 1.04 469 2003 6 539.76 1.77 1.31 440 2003 7 540.09 1.41 1.15 393 2003 8 540.33 1.08 1.13 387 2003 9 540.61 1.33 1.19 264 2003 10 540.22 0.93 1.30 280 2003 11 540.35 0.95 1.06 372 2003 12 540.41 1.83 1.50 79 2004 1 540.35 0.90 0.95 230 2004 2 540.66 0.76 0.85 568 2004 3 540.48 0.68 0.84 599 2004 4 540.62 0.96 0.80 595 2004 5 540.33 0.79 0.79 654 2004 6 540.48 0.70 0.75 599 2004 7 540.81 0.68 0.82 612 2004 8 540.88 0.69 0.75 601 2004 9 541.01 0.98 0.88 602 2004 10 540.98 1.10 0.81 657 2004 11 540.79 1.07 1.20 585 2004 12 540.36 0.70 0.87 657 2005 1 539.62 0.58 0.90 675 2005 2 539.43 0.65 0.94 523 2005 3 538.66 0.69 0.90 176 2005 4 538.55 0.65 0.88 475 2005 5 538.39 0.61 0.89 479 2005 6 538.52 0.69 0.98 370 2005 7 538.86 0.69 0.89 689 2005 8 539.12 0.68 0.95 668 2005 9 539.73 0.68 0.89 665 2005 10 539.69 0.68 0.97 692 2005 11 539.75 0.58 0.85 653 2005 12 539.55 0.78 1.06 461 2006 1 538.96 0.92 1.17 492 2006 2 538.59 0.88 1.19 630 2006 3 538.19 1.02 1.20 721 2006 4 537.71 1.30 1.36 690 2006 5 537.58 1.20 1.28 660 2006 6 537.52 1.27 1.32 671 2006 7 537.76 1.29 1.29 704 2006 8 538.07 1.40 1.25 685 2006 9 537.90 1.37 1.36 676 2006 10 537.99 0.96 1.13 721 2006 11 537.95 0.76 1.07 652 2006 12 537.66 0.76 0.95 621 2007 1 537.35 0.73 1.01 575 2007 2 536.80 0.82 1.13 563 2007 3 536.13 1.12 1.28 613 2007 4 535.84 1.00 1.11 470 2007 5 536.42 0.87 1.79 279 2007 6 535.36 1.67 1.38 198 2007 7 535.17 1.07 1.10 716 2007 8 535.23 1.24 1.20 697 2007 9 535.27 1.11 1.15 679 2007 10 534.92 1.01 1.20 712 2007 11 534.76 0.69 1.12 675 2007 12 535.09 0.58 1.01 684 2008 1 535.40 0.65 1.06 651 2008 2 535.23 0.84 1.25 635 2008 3 534.23 0.98 1.29 704 2008 4 533.81 1.51 2.20 617 2008 5 533.44 0.64 1.13 685 2008 6 533.37 0.56 0.99 677 2008 7 533.74 0.67 1.04 705 2008 8 533.71 0.76 1.08 625 2008 9 533.23 0.93 1.29 669 2008 10 533.71 1.26 1.30 704 2008 11 534.06 1.04 1.29 668 2008 12 534.13 0.60 0.93 697 2009 1 533.95 1.09 1.26 644 2009 2 531.75 1.43 1.60 654 2009 3 531.16 0.74 1.28 708 2009 4 530.56 0.76 1.24 668 2009 5 530.32 0.77 1.25 723 2009 6 530.20 0.71 1.17 696 2009 7 530.34 0.72 1.16 702 2009 8 530.49 0.71 1.20 691 2009 9 530.34 0.89 1.29 687 2009 10 530.14 1.28 1.50 669 2009 11 530.24 1.49 1.59 688 2009 12 529.85 1.22 1.53 711 2010 1 529.82 0.83 1.38 705 2010 2 529.04 1.18 1.62 628 2010 3 528.58 1.14 1.57 699 2010 4 528.06 1.14 1.51 660 2010 5 527.88 1.08 1.59 682 2010 6 527.81 1.29 1.65 671 2010 7 528.10 1.30 1.65 682 2010 8 528.15 1.07 1.53 697 2010 9 527.81 1.37 1.61 581 2010 10 527.36 1.86 1.91 574 2010 11 527.24 1.00 1.57 656 2010 12 526.98 1.07 1.75 628 2011 1 526.32 1.07 1.73 726 2011 2 526.07 1.35 1.97 632 2011 3 525.63 1.33 2.02 629 2011 4 524.98 1.27 2.01 646 2011 5 524.62 1.46 2.30 681 2011 6 524.88 1.22 1.85 584 2011 7 524.61 1.07 1.63 534 2011 8 524.77 1.15 1.72 272 2011 9 524.86 1.18 1.87 341 2011 10 524.34 1.19 2.15 286 2011 11 524.38 1.22 2.43 399 2011 12 524.03 0.90 1.34 700 2012 1 524.04 0.91 1.34 514 2012 2 523.72 1.02 1.32 256 2012 3 523.17 1.61 1.44 73 2012 4 522.47 1.12 1.33 220 2012 5 522.31 1.33 1.20 363 2012 6 522.76 1.33 1.24 27 2012 7 521.32 0.73 1.00 325 2012 8 522.25 0.67 0.84 579 2012 9 521.57 0.80 0.98 580 2012 10 520.55 0.60 0.88 690 2012 11 521.11 0.54 0.89 665 2012 12 521.25 0.47 0.68 705 2013 1 521.10 0.50 0.71 666 2013 2 520.96 0.59 0.79 637 2013 3 520.87 0.54 0.83 710 2013 4 520.66 0.56 0.94 677 2013 5 520.37 0.53 0.92 714 2013 6 519.97 0.63 1.03 689 2013 7 520.73 0.57 0.96 677 2013 8 519.60 0.59 0.99 728 2013 9 519.01 0.55 0.92 693 2013 10 519.87 0.54 0.85 701 2013 11 519.38 0.58 0.80 645 2013 12 519.31 0.52 0.68 687 2014 1 518.79 0.40 0.76 700 2014 2 519.14 0.61 0.83 523 2014 3 518.66 0.70 0.90 707 2014 4 518.16 0.64 0.92 674 2014 5 518.66 0.65 0.87 721 2014 6 518.18 0.67 0.91 623 2014 7 517.93 0.63 0.91 557 2014 8 517.92 0.60 0.88 719 2014 9 518.09 0.57 0.85 685 2014 10 518.21 0.57 0.85 669 2014 11 518.12 0.62 0.80 642 2014 12 517.73 0.57 0.80 683 2015 1 517.74 0.61 0.78 443 2015 2 517.00 0.58 0.97 623 2015 3 516.01 0.48 0.86 657 2015 4 515.88 0.48 0.94 615 2015 5 515.66 0.47 0.87 650 2015 6 515.30 0.53 0.87 623 2015 7 515.27 0.56 0.92 647 2015 8 515.38 0.60 0.89 620 2015 9 514.89 0.61 0.92 631 2015 10 514.30 0.55 0.85 697 2015 11 513.95 0.51 0.72 650 2015 12 513.46 0.44 0.70 645 2016 1 513.08 0.49 0.73 669 2016 2 512.53 0.46 0.83 658 2016 3 512.63 0.44 0.75 635 2016 4 512.40 0.45 0.91 543 2016 5 511.55 0.69 1.02 683 2016 6 511.43 0.57 0.93 666 2016 7 511.11 0.54 0.98 683 2016 8 510.59 0.62 0.96 709 2016 9 510.87 0.56 0.95 686 2016 10 510.01 0.50 0.86 714 2016 11 509.14 0.47 0.73 686 2016 12 509.52 0.54 0.89 599 2017 1 509.62 0.65 0.86 643 2017 2 509.00 0.66 0.85 591 2017 3 508.76 0.96 0.94 651 2017 4 508.50 1.22 1.14 341 2017 5 508.29 1.15 1.12 347 2017 6 508.49 1.29 1.06 321 2017 7 508.42 1.33 1.15 324 2017 8 508.59 1.55 1.32 310 2017 9 508.69 1.25 1.10 317 2017 10 508.57 1.24 1.13 254 2017 11 508.56 1.01 1.11 316 2017 12 507.21 1.17 1.45 259 2018 1 506.78 1.01 1.25 288 2018 2 506.68 1.07 1.05 64 2018 3 nan nan nan 0 2018 4 506.99 3.24 1.59 203 2018 5 506.47 2.95 1.72 330 2018 6 506.40 3.08 1.90 298 2018 7 506.52 3.48 1.73 314 2018 8 506.08 3.27 1.56 323 2018 9 505.63 1.83 1.46 486 2018 10 505.32 1.42 1.25 661 2018 11 504.91 1.56 1.43 596 2018 12 504.26 1.59 1.40 676 2019 1 503.60 1.48 1.43 614 2019 2 502.74 1.47 1.30 564 2019 3 502.86 1.19 1.17 709 2019 4 502.46 1.24 1.19 601 2019 5 501.61 1.21 1.22 674 2019 6 502.03 1.29 1.26 659 2019 7 501.48 1.26 1.27 678 2019 8 501.08 1.33 1.28 674 2019 9 500.98 1.17 1.47 593 2019 10 499.97 1.13 1.58 722 2019 11 498.95 0.84 1.42 672 2019 12 498.46 0.82 1.49 692 2020 1 498.20 1.12 1.62 590 2020 2 498.43 0.87 1.20 617 2020 3 498.18 0.65 1.00 351 2020 4 497.52 0.71 1.05 357 2020 5 497.52 0.70 1.13 365 2020 6 497.15 0.76 1.14 355 2020 7 497.07 0.75 1.25 367 2020 8 496.65 0.69 1.17 352 2020 9 496.67 0.70 1.12 344 2020 10 496.70 0.69 1.03 457 2020 11 496.11 0.72 1.13 694 2020 12 495.94 0.70 1.08 675 2021 1 495.65 0.67 1.16 569 2021 2 493.99 0.69 1.13 314 2021 3 493.39 0.76 1.18 354 2021 4 493.10 0.72 1.25 344 2021 5 492.57 0.73 1.24 323 2021 6 492.25 0.70 1.26 341 2021 7 491.78 0.77 1.21 358 2021 8 492.14 0.83 1.33 346 2021 9 491.94 0.76 1.31 353 2021 10 491.99 0.77 1.42 606 2021 11 491.35 0.88 1.35 680 2021 12 490.94 0.83 1.27 694 2022 1 490.99 1.27 1.39 455 2022 2 490.42 1.31 1.49 396 2022 3 490.77 1.17 1.71 658 2022 4 490.12 1.21 1.74 696 2022 5 489.79 1.42 1.68 657 2022 6 489.25 1.30 1.72 461 2022 7 489.39 1.25 1.68 714 2022 8 488.59 1.27 1.73 703 2022 9 488.75 1.15 1.70 693 2022 10 487.62 1.19 1.39 727 2022 11 487.16 0.94 1.28 708 2022 12 487.64 1.41 1.67 586 2023 1 487.65 1.44 1.93 704 2023 2 486.28 1.44 1.72 465 2023 3 486.80 1.71 2.10 541 2023 4 485.58 1.72 1.99 208