# file: spo_CH3Cl_MM.dat # date: Wed, Sep 26, 2018 3:03:22 PM # # (CH3Cl) 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/GMD1 # 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: data from # the NOAA/ESRL halocarbons in situ program. # # DOI: http://doi.org/10.7289/V5X0659V # # Calibration scale used: NOAA 2003 # # 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. # # year, month, monthly median of CH3Cl in ppt, std. dev., number of samples # CH3ClcatsSPOyr CH3ClcatsSPOmon CH3ClcatsSPOm CH3ClcatsSPOsd CH3ClcatsSPOn 1998 1 nan nan 0 1998 2 nan nan 0 1998 3 nan nan 0 1998 4 nan nan 0 1998 5 nan nan 0 1998 6 nan nan 0 1998 7 nan nan 0 1998 8 nan nan 0 1998 9 nan nan 0 1998 10 nan nan 0 1998 11 nan nan 0 1998 12 nan nan 0 1999 1 nan nan 0 1999 2 nan nan 0 1999 3 nan nan 0 1999 4 nan nan 0 1999 5 nan nan 0 1999 6 nan nan 0 1999 7 573.35 2.60 608 1999 8 573.69 3.04 611 1999 9 575.02 3.27 449 1999 10 565.51 3.09 455 1999 11 552.07 2.38 592 1999 12 537.95 2.84 587 2000 1 536.42 2.77 311 2000 2 522.58 2.28 478 2000 3 518.84 2.59 572 2000 4 530.83 3.35 585 2000 5 543.04 2.85 663 2000 6 559.94 2.59 519 2000 7 566.51 2.79 522 2000 8 574.57 2.92 566 2000 9 569.26 2.63 583 2000 10 560.71 7.03 589 2000 11 549.02 7.99 475 2000 12 530.13 4.75 504 2001 1 518.85 4.89 520 2001 2 513.76 3.83 358 2001 3 525.46 3.53 326 2001 4 518.20 3.50 638 2001 5 522.68 3.19 673 2001 6 536.31 3.79 573 2001 7 545.35 3.90 555 2001 8 546.32 3.08 556 2001 9 538.94 3.32 417 2001 10 543.50 3.18 588 2001 11 526.24 2.50 545 2001 12 500.14 2.22 498 2002 1 503.79 2.20 486 2002 2 486.22 2.36 383 2002 3 486.54 2.42 590 2002 4 499.72 2.59 442 2002 5 524.92 3.64 424 2002 6 547.69 6.42 386 2002 7 559.15 1.79 445 2002 8 554.17 2.23 572 2002 9 546.24 2.25 393 2002 10 551.26 3.43 454 2002 11 534.46 2.49 188 2002 12 517.57 2.73 637 2003 1 498.44 4.41 76 2003 2 504.77 2.59 477 2003 3 504.29 2.15 634 2003 4 500.09 2.77 351 2003 5 512.19 3.73 374 2003 6 527.25 3.35 381 2003 7 544.08 3.59 301 2003 8 548.90 3.29 368 2003 9 549.99 3.61 632 2003 10 543.40 2.71 588 2003 11 535.83 3.20 430 2003 12 nan nan 0 2004 1 495.04 3.68 251 2004 2 491.66 5.16 604 2004 3 497.46 5.17 635 2004 4 506.96 4.95 656 2004 5 515.83 6.14 564 2004 6 525.65 10.93 129 2004 7 545.31 12.57 113 2004 8 547.81 6.97 487 2004 9 554.78 7.57 472 2004 10 560.13 6.23 614 2004 11 523.56 4.95 280 2004 12 504.69 4.63 659 2005 1 486.15 4.64 539 2005 2 nan nan 0 2005 3 nan nan 0 2005 4 nan nan 0 2005 5 nan nan 0 2005 6 nan nan 0 2005 7 nan nan 0 2005 8 nan nan 0 2005 9 nan nan 0 2005 10 nan nan 0 2005 11 nan nan 0 2005 12 nan nan 0 2006 1 nan nan 0 2006 2 nan nan 0 2006 3 502.40 7.72 291 2006 4 502.39 7.45 654 2006 5 511.71 6.09 443 2006 6 520.83 6.42 673 2006 7 522.33 6.72 691 2006 8 529.97 5.58 677 2006 9 531.61 6.92 468 2006 10 526.79 4.62 644 2006 11 515.42 4.50 644 2006 12 517.30 6.01 137 2007 1 nan nan 0 2007 2 499.44 4.28 470 2007 3 500.98 5.65 703 2007 4 513.80 5.49 681 2007 5 530.45 5.41 651 2007 6 549.97 4.92 686 2007 7 556.58 4.79 707 2007 8 560.88 5.07 688 2007 9 560.67 5.22 676 2007 10 561.29 5.89 712 2007 11 547.87 5.92 701 2007 12 530.48 6.64 679 2008 1 504.36 4.34 686 2008 2 502.99 3.74 668 2008 3 505.54 4.98 716 2008 4 512.30 4.49 582 2008 5 524.36 2.49 631 2008 6 531.60 1.90 502 2008 7 536.70 1.78 666 2008 8 533.60 1.78 506 2008 9 529.21 1.95 661 2008 10 519.44 2.68 680 2008 11 504.87 2.79 689 2008 12 485.59 2.33 705 2009 1 478.46 1.78 580 2009 2 481.32 3.16 669 2009 3 483.22 1.77 718 2009 4 489.81 1.57 539 2009 5 502.86 1.23 741 2009 6 512.14 0.98 697 2009 7 522.28 1.08 729 2009 8 529.09 1.09 683 2009 9 530.71 1.12 713 2009 10 525.16 1.48 710 2009 11 507.29 1.83 686 2009 12 494.57 1.78 667 2010 1 514.04 1.21 74 2010 2 479.58 2.08 489 2010 3 475.98 2.28 518 2010 4 498.64 2.86 77 2010 5 533.93 1.61 86 2010 6 509.50 2.01 76 2010 7 520.54 3.54 82 2010 8 513.90 3.13 75 2010 9 531.78 2.19 124 2010 10 527.90 2.00 410 2010 11 557.73 1.67 666 2010 12 546.20 1.75 505 2011 1 524.04 1.75 692 2011 2 516.77 2.29 553 2011 3 513.24 2.05 714 2011 4 520.03 1.74 672 2011 5 533.04 1.54 679 2011 6 537.04 1.38 680 2011 7 540.92 1.67 699 2011 8 543.56 1.71 395 2011 9 546.21 2.04 363 2011 10 543.99 1.99 350 2011 11 554.31 1.72 512 2011 12 539.31 1.69 178 2012 1 506.88 1.78 352 2012 2 507.43 1.07 434 2012 3 512.36 1.39 334 2012 4 521.63 1.92 413 2012 5 532.67 1.71 542 2012 6 546.64 1.87 345 2012 7 552.78 2.07 258 2012 8 559.54 1.93 570 2012 9 562.91 1.91 579 2012 10 559.74 1.44 672 2012 11 552.26 1.63 472 2012 12 537.18 1.47 495 2013 1 525.50 1.69 595 2013 2 521.90 2.32 620 2013 3 518.28 1.94 548 2013 4 523.43 2.12 662 2013 5 532.37 1.11 458 2013 6 550.40 1.70 570 2013 7 549.94 1.13 666 2013 8 559.58 1.30 698 2013 9 559.90 1.30 687 2013 10 556.75 1.61 685 2013 11 548.22 2.07 646 2013 12 530.92 1.56 578 2014 1 512.48 1.60 610 2014 2 503.05 2.74 603 2014 3 500.30 2.58 691 2014 4 506.66 1.68 663 2014 5 514.51 1.70 721 2014 6 533.64 1.63 633 2014 7 537.21 1.44 702 2014 8 542.36 1.47 681 2014 9 540.75 1.41 667 2014 10 535.34 1.85 638 2014 11 530.40 2.51 611 2014 12 517.81 1.81 657 2015 1 504.00 1.95 424 2015 2 495.89 2.83 381 2015 3 nan nan 0 2015 4 nan nan 0 2015 5 nan nan 0 2015 6 nan nan 0 2015 7 nan nan 0 2015 8 nan nan 0 2015 9 nan nan 0 2015 10 nan nan 0 2015 11 nan nan 0 2015 12 nan nan 0 2016 1 nan nan 0 2016 2 nan nan 0 2016 3 nan nan 0 2016 4 nan nan 0 2016 5 nan nan 0 2016 6 547.29 1.54 38 2016 7 550.51 1.43 340 2016 8 553.05 1.34 345 2016 9 548.39 1.29 338 2016 10 538.03 1.83 589 2016 11 533.50 1.25 675 2016 12 514.77 1.09 604 2017 1 501.29 1.02 679 2017 2 496.27 1.19 401 2017 3 494.58 1.49 321 2017 4 491.85 1.60 337 2017 5 497.72 1.42 360 2017 6 507.07 1.54 332 2017 7 508.82 1.52 339 2017 8 510.91 1.57 330 2017 9 508.94 1.49 205 2017 10 nan nan 0 2017 11 nan nan 0 2017 12 nan nan 0 2018 1 nan nan 0 2018 2 nan nan 0 2018 3 nan nan 0 2018 4 nan nan 0 2018 5 nan nan 0 2018 6 nan nan 0 2018 7 nan nan 0 2018 8 nan nan 0 2018 9 nan nan 0