# file: spo_F12_MM.dat # date: Wed, Jun 16, 2021 3:26:59 PM # # 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/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: Chloroflurocarbon-12 data from # the NOAA/ESRL halocarbons in situ program. # # DOI: http://doi.org/10.7289/V5X0659V # # Calibration scale used: NOAA 2008 # # 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 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 0.73 0.92 511 2000 5 537.52 0.62 0.90 579 2000 6 537.85 0.56 0.81 479 2000 7 538.01 0.64 0.82 374 2000 8 538.97 0.64 0.74 479 2000 9 nan nan nan 0 2000 10 538.55 0.78 1.15 30 2000 11 539.15 0.89 1.15 209 2000 12 539.07 2.10 1.92 447 2001 1 538.85 2.20 2.25 454 2001 2 538.40 2.31 2.29 312 2001 3 538.94 2.65 1.85 175 2001 4 537.95 2.40 2.31 421 2001 5 537.92 2.69 2.50 409 2001 6 538.67 1.78 1.82 411 2001 7 538.82 1.88 2.09 417 2001 8 539.40 1.78 2.29 285 2001 9 539.42 1.44 1.66 327 2001 10 540.56 2.32 2.19 261 2001 11 540.68 2.79 3.33 426 2001 12 540.90 2.62 3.01 346 2002 1 540.35 4.19 4.21 188 2002 2 540.69 1.02 1.10 261 2002 3 nan nan nan 0 2002 4 540.30 0.61 0.88 61 2002 5 540.16 0.93 1.00 457 2002 6 540.35 1.25 1.09 333 2002 7 540.35 1.30 1.10 180 2002 8 540.28 1.14 1.11 334 2002 9 539.90 0.96 1.01 265 2002 10 540.09 0.67 1.01 335 2002 11 539.79 1.04 1.05 148 2002 12 539.64 0.79 0.97 481 2003 1 539.30 1.04 1.07 452 2003 2 539.17 0.92 0.93 423 2003 3 539.07 0.97 0.99 510 2003 4 539.20 1.28 1.17 448 2003 5 539.47 1.14 1.04 469 2003 6 539.76 1.77 1.31 440 2003 7 540.09 1.41 1.15 393 2003 8 540.32 1.07 1.13 387 2003 9 540.61 1.37 1.19 264 2003 10 540.22 0.92 1.30 280 2003 11 540.35 0.96 1.06 372 2003 12 540.43 1.81 1.50 80 2004 1 540.36 0.79 0.95 230 2004 2 540.66 0.77 0.85 570 2004 3 540.48 0.68 0.84 599 2004 4 540.62 0.96 0.80 595 2004 5 540.33 0.80 0.79 654 2004 6 540.48 0.70 0.75 599 2004 7 540.81 0.67 0.82 613 2004 8 540.88 0.67 0.75 601 2004 9 541.01 0.99 0.88 602 2004 10 540.98 1.12 0.81 658 2004 11 540.79 1.08 1.20 586 2004 12 540.36 0.70 0.87 657 2005 1 539.62 0.59 0.90 675 2005 2 539.43 0.64 0.94 523 2005 3 538.66 0.75 0.90 176 2005 4 538.54 0.63 0.88 475 2005 5 538.39 0.61 0.89 479 2005 6 538.52 0.72 0.98 370 2005 7 538.86 0.69 0.89 690 2005 8 539.12 0.68 0.95 668 2005 9 539.73 0.68 0.89 665 2005 10 539.69 0.68 0.97 693 2005 11 539.75 0.57 0.85 653 2005 12 539.55 0.78 1.06 461 2006 1 538.96 0.91 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 1.21 1.28 660 2006 6 537.52 1.27 1.32 674 2006 7 537.76 1.29 1.29 709 2006 8 538.07 1.41 1.26 688 2006 9 537.90 1.36 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 0.77 1.01 575 2007 2 536.80 0.82 1.13 563 2007 3 536.17 1.10 1.28 630 2007 4 535.85 1.00 1.12 470 2007 5 536.41 0.87 1.79 279 2007 6 535.36 1.64 1.38 198 2007 7 535.17 1.07 1.10 716 2007 8 535.23 1.25 1.20 697 2007 9 535.27 1.10 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 3 534.24 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 7 533.75 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 1.25 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 1.12 1.26 648 2009 2 531.75 1.43 1.60 654 2009 3 531.16 0.74 1.28 708 2009 4 530.56 0.75 1.24 668 2009 5 530.31 0.78 1.25 723 2009 6 530.20 0.71 1.17 696 2009 7 530.34 0.72 1.16 702 2009 8 530.48 0.71 1.20 691 2009 9 530.35 0.90 1.29 687 2009 10 530.13 1.28 1.50 669 2009 11 530.25 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 1.15 1.57 699 2010 4 528.06 1.14 1.51 660 2010 5 527.88 1.09 1.59 681 2010 6 527.82 1.29 1.65 671 2010 7 528.10 1.29 1.65 682 2010 8 528.15 1.07 1.53 698 2010 9 527.81 1.38 1.61 582 2010 10 527.37 1.85 1.91 573 2010 11 527.22 1.00 1.57 656 2010 12 526.98 1.06 1.75 628 2011 1 526.32 1.08 1.73 726 2011 2 526.07 1.35 1.97 632 2011 3 525.62 1.32 2.02 629 2011 4 524.98 1.27 2.01 646 2011 5 524.65 1.46 2.30 681 2011 6 524.86 1.22 1.85 584 2011 7 524.62 1.07 1.63 534 2011 8 524.76 1.14 1.73 272 2011 9 524.87 1.18 1.87 341 2011 10 524.34 1.18 2.15 286 2011 11 524.41 1.24 2.43 399 2011 12 524.01 0.90 1.34 700 2012 1 524.03 0.90 1.34 514 2012 2 523.71 1.04 1.32 256 2012 3 523.20 1.58 1.44 73 2012 4 522.49 1.13 1.33 220 2012 5 522.32 1.23 1.20 363 2012 6 522.76 1.26 1.25 27 2012 7 521.33 0.73 1.00 325 2012 8 522.24 0.67 0.84 579 2012 9 521.57 0.80 0.98 580 2012 10 520.55 0.60 0.88 690 2012 11 521.12 0.54 0.89 665 2012 12 521.25 0.46 0.68 705 2013 1 521.09 0.50 0.71 666 2013 2 520.97 0.59 0.79 637 2013 3 520.86 0.54 0.83 710 2013 4 520.66 0.56 0.94 677 2013 5 520.37 0.52 0.92 714 2013 6 519.96 0.61 1.03 689 2013 7 520.72 0.56 0.96 677 2013 8 519.60 0.59 1.00 728 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 0.51 0.68 687 2014 1 518.79 0.40 0.76 700 2014 2 519.14 0.61 0.83 523 2014 3 518.67 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 0.66 0.90 623 2014 7 517.92 0.64 0.91 557 2014 8 517.93 0.60 0.88 719 2014 9 518.09 0.58 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 0.85 657 2015 4 515.89 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 8 515.37 0.60 0.89 620 2015 9 514.89 0.61 0.92 631 2015 10 514.29 0.55 0.85 697 2015 11 513.95 0.51 0.72 650 2015 12 513.46 0.44 0.70 645 2016 1 513.09 0.48 0.73 669 2016 2 512.53 0.47 0.84 658 2016 3 512.63 0.44 0.75 635 2016 4 512.41 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 8 510.60 0.61 0.96 709 2016 9 510.87 0.56 0.95 686 2016 10 510.01 0.50 0.86 714 2016 11 509.15 0.47 0.73 686 2016 12 509.52 0.54 0.89 599 2017 1 509.63 0.65 0.86 643 2017 2 509.00 0.66 0.85 591 2017 3 508.75 0.95 0.94 651 2017 4 508.51 1.21 1.14 341 2017 5 508.30 1.15 1.12 347 2017 6 508.49 1.30 1.06 321 2017 7 508.42 1.34 1.15 324 2017 8 508.59 1.55 1.32 310 2017 9 508.71 1.25 1.10 317 2017 10 508.56 1.23 1.13 254 2017 11 508.56 0.98 1.11 316 2017 12 507.23 1.17 1.46 259 2018 1 506.76 1.01 1.25 288 2018 2 506.68 1.07 1.06 64 2018 3 nan nan nan 0 2018 4 506.99 3.25 1.59 203 2018 5 506.47 2.96 1.72 330 2018 6 506.41 3.07 1.90 298 2018 7 506.52 3.43 1.74 314 2018 8 506.08 3.26 1.56 323 2018 9 505.61 1.81 1.46 486 2018 10 505.33 1.41 1.25 661 2018 11 504.91 1.56 1.43 596 2018 12 504.27 1.59 1.40 676 2019 1 503.60 1.49 1.42 614 2019 2 502.74 1.46 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 8 501.07 1.30 1.28 674 2019 9 500.97 1.17 1.47 593 2019 10 499.96 1.13 1.58 722 2019 11 498.97 0.83 1.42 672 2019 12 498.46 0.82 1.49 692 2020 1 498.21 1.15 1.62 590 2020 2 498.47 0.90 1.20 656 2020 3 498.75 0.64 1.18 707 2020 4 497.97 0.71 1.22 715 2020 5 498.01 0.70 1.32 730 2020 6 497.88 0.75 1.38 710 2020 7 497.82 0.75 1.44 734 2020 8 497.44 0.70 1.43 704 2020 9 497.27 0.70 1.33 688 2020 10 497.01 0.69 1.08 715 2020 11 496.11 0.72 1.13 694 2020 12 495.93 0.70 1.07 675 2021 1 495.61 0.67 1.16 698 2021 2 494.33 0.69 1.21 633 2021 3 493.78 0.77 1.34 707 2021 4 493.80 0.73 1.50 690 2021 5 493.39 0.74 1.61 646 2021 6 493.63 0.79 1.71 317