# file: smo_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 Cape Matatulu (SMO), American Samoa (14.3 S, 170.6 W, elevation: 77 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 # CH3ClcatsSMOyr CH3ClcatsSMOmon CH3ClcatsSMOm CH3ClcatsSMOsd CH3ClcatsSMOn 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 1 555.71 2.33 83 1999 2 565.90 2.73 573 1999 3 548.99 3.04 678 1999 4 550.45 3.41 498 1999 5 567.88 2.18 87 1999 6 573.63 3.56 670 1999 7 576.94 4.48 663 1999 8 580.72 4.64 494 1999 9 577.60 8.88 197 1999 10 569.32 22.85 30 1999 11 571.36 25.10 50 1999 12 566.20 16.63 75 2000 1 555.83 10.96 85 2000 2 553.62 8.78 258 2000 3 568.23 6.15 534 2000 4 566.68 4.12 509 2000 5 575.06 4.53 505 2000 6 571.67 3.96 222 2000 7 575.08 3.66 501 2000 8 564.89 2.26 536 2000 9 558.93 1.76 612 2000 10 554.72 2.20 493 2000 11 547.84 2.44 610 2000 12 546.94 3.11 635 2001 1 540.84 3.51 536 2001 2 545.35 2.63 294 2001 3 nan nan 0 2001 4 547.93 1.72 80 2001 5 558.35 1.11 550 2001 6 560.84 0.98 628 2001 7 562.46 1.27 374 2001 8 nan nan 0 2001 9 nan nan 0 2001 10 nan nan 0 2001 11 544.62 1.16 354 2001 12 545.15 2.55 616 2002 1 542.47 1.75 662 2002 2 541.38 1.41 386 2002 3 545.83 1.56 674 2002 4 542.37 1.45 674 2002 5 554.08 1.61 365 2002 6 562.11 1.54 624 2002 7 564.29 1.46 591 2002 8 561.22 1.22 534 2002 9 561.36 1.16 558 2002 10 557.19 1.05 668 2002 11 554.95 1.37 626 2002 12 545.24 1.52 679 2003 1 543.75 1.03 638 2003 2 547.59 1.20 633 2003 3 552.26 2.12 646 2003 4 548.63 2.02 651 2003 5 549.51 1.74 662 2003 6 548.92 1.37 607 2003 7 561.34 1.12 627 2003 8 565.43 0.98 666 2003 9 556.29 0.98 533 2003 10 557.89 1.37 256 2003 11 552.54 1.03 359 2003 12 541.22 0.82 642 2004 1 548.54 0.42 61 2004 2 nan nan 0 2004 3 535.23 1.47 524 2004 4 546.90 0.93 654 2004 5 550.18 0.68 661 2004 6 549.63 0.75 593 2004 7 553.76 0.67 632 2004 8 547.12 0.93 616 2004 9 546.90 1.51 655 2004 10 545.81 1.70 700 2004 11 542.38 1.34 617 2004 12 543.77 1.71 689 2005 1 554.63 1.41 633 2005 2 559.78 1.03 471 2005 3 553.75 1.15 662 2005 4 559.27 1.34 682 2005 5 565.94 1.12 677 2005 6 576.60 0.81 49 2005 7 nan nan 0 2005 8 562.62 10.91 93 2005 9 562.32 2.73 625 2005 10 562.09 4.51 450 2005 11 556.53 1.12 356 2005 12 553.82 1.07 656 2006 1 555.28 0.76 570 2006 2 562.58 1.32 609 2006 3 546.16 2.91 524 2006 4 549.39 5.99 54 2006 5 563.70 1.41 564 2006 6 572.06 1.17 643 2006 7 566.92 0.87 550 2006 8 563.14 1.34 522 2006 9 552.69 1.43 594 2006 10 547.38 1.55 581 2006 11 537.63 0.81 512 2006 12 539.94 1.00 617 2007 1 534.79 1.24 623 2007 2 551.52 1.43 511 2007 3 551.22 0.71 672 2007 4 541.40 1.09 638 2007 5 557.57 6.50 345 2007 6 559.25 9.27 310 2007 7 549.68 3.01 557 2007 8 546.19 2.63 624 2007 9 542.77 2.47 685 2007 10 536.94 2.12 552 2007 11 nan nan 0 2007 12 nan nan 0 2008 1 535.04 2.11 462 2008 2 520.46 1.94 629 2008 3 521.66 1.77 688 2008 4 528.92 1.81 688 2008 5 536.90 1.58 685 2008 6 545.90 1.73 671 2008 7 545.99 2.04 691 2008 8 540.84 2.06 676 2008 9 535.75 2.19 671 2008 10 529.54 2.33 658 2008 11 526.27 2.67 629 2008 12 520.28 2.61 697 2009 1 522.42 2.54 631 2009 2 525.67 2.70 618 2009 3 542.88 2.56 614 2009 4 543.45 1.94 604 2009 5 559.11 2.08 642 2009 6 561.84 2.30 247 2009 7 nan nan 0 2009 8 nan nan 0 2009 9 nan nan 0 2009 10 591.03 7.32 285 2009 11 571.14 8.26 452 2009 12 567.78 6.48 472 2010 1 570.88 7.38 482 2010 2 554.70 3.28 539 2010 3 563.13 3.94 383 2010 4 nan nan 0 2010 5 nan nan 0 2010 6 595.75 6.91 111 2010 7 600.56 5.78 311 2010 8 535.59 6.03 288 2010 9 558.02 7.38 273 2010 10 555.29 9.76 395 2010 11 556.01 7.07 482 2010 12 563.60 5.57 187 2011 1 nan nan 0 2011 2 nan nan 0 2011 3 nan nan 0 2011 4 nan nan 0 2011 5 nan nan 0 2011 6 nan nan 0 2011 7 nan nan 0 2011 8 nan nan 0 2011 9 nan nan 0 2011 10 539.65 1.80 297 2011 11 541.29 1.97 687 2011 12 532.16 2.11 696 2012 1 536.18 1.84 527 2012 2 541.57 1.48 625 2012 3 nan nan 0 2012 4 nan nan 0 2012 5 nan nan 0 2012 6 nan nan 0 2012 7 nan nan 0 2012 8 nan nan 0 2012 9 nan nan 0 2012 10 nan nan 0 2012 11 nan nan 0 2012 12 nan nan 0 2013 1 575.48 1.52 242 2013 2 576.61 1.40 310 2013 3 595.65 1.67 291 2013 4 nan nan 0 2013 5 592.16 1.73 238 2013 6 604.91 1.65 299 2013 7 595.62 1.60 220 2013 8 564.61 1.29 305 2013 9 569.64 1.44 328 2013 10 564.72 1.49 348 2013 11 559.96 1.16 337 2013 12 558.40 1.62 320 2014 1 nan nan 0 2014 2 nan nan 0 2014 3 nan nan 0 2014 4 nan nan 0 2014 5 nan nan 0 2014 6 nan nan 0 2014 7 nan nan 0 2014 8 nan nan 0 2014 9 nan nan 0 2014 10 nan nan 0 2014 11 nan nan 0 2014 12 nan nan 0 2015 1 nan nan 0 2015 2 nan nan 0 2015 3 nan nan 0 2015 4 nan nan 0 2015 5 nan nan 0 2015 6 nan nan 0 2015 7 544.92 1.36 403 2015 8 541.95 1.61 706 2015 9 530.73 1.74 630 2015 10 517.11 1.50 623 2015 11 511.12 2.15 668 2015 12 510.48 3.31 582 2016 1 517.08 3.75 604 2016 2 498.96 3.21 666 2016 3 517.70 3.42 480 2016 4 508.12 2.67 626 2016 5 514.37 3.41 535 2016 6 508.94 6.37 230 2016 7 526.70 6.53 66 2016 8 nan nan 0 2016 9 513.82 1.98 503 2016 10 504.78 1.62 507 2016 11 505.94 1.99 472 2016 12 493.23 2.60 623 2017 1 503.96 2.00 527 2017 2 503.21 2.21 550 2017 3 500.00 2.13 544 2017 4 525.47 4.34 470 2017 5 527.89 1.73 667 2017 6 534.78 5.93 64 2017 7 508.86 2.58 57 2017 8 509.17 2.26 622 2017 9 496.58 1.98 421 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