# file: brw_CH3Cl_MM.dat # date: Wed, Sep 26, 2018 3:03:21 PM # # (CH3Cl) data from hourly in situ samples analyzed on a gas chromatograph located # at Pt. Barrow (BRW), Alaska (71.3 N, 156.6 W, elevation: 8 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 # CH3ClcatsBRWyr CH3ClcatsBRWmon CH3ClcatsBRWm CH3ClcatsBRWsd CH3ClcatsBRWn 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 8 488.19 6.08 109 1998 9 498.55 5.00 281 1998 10 530.29 4.96 707 1998 11 557.15 6.22 681 1998 12 551.08 5.87 509 1999 1 572.60 18.52 553 1999 2 585.24 30.58 402 1999 3 587.35 5.60 639 1999 4 584.49 3.82 587 1999 5 578.59 9.72 135 1999 6 549.61 7.01 468 1999 7 516.30 8.63 506 1999 8 488.06 16.63 534 1999 9 478.87 19.19 358 1999 10 nan nan 0 1999 11 524.56 8.71 591 1999 12 547.40 6.14 727 2000 1 563.25 4.78 698 2000 2 578.69 4.07 661 2000 3 576.56 4.68 663 2000 4 574.42 8.44 492 2000 5 548.06 3.47 737 2000 6 520.00 5.76 578 2000 7 488.99 5.20 483 2000 8 nan nan 0 2000 9 466.45 6.30 299 2000 10 476.95 7.16 561 2000 11 494.34 5.79 601 2000 12 520.67 4.94 735 2001 1 530.99 11.08 315 2001 2 539.29 8.24 421 2001 3 537.89 7.39 619 2001 4 543.83 5.86 573 2001 5 539.37 4.90 718 2001 6 518.12 4.94 636 2001 7 488.49 6.85 613 2001 8 461.20 4.91 581 2001 9 451.12 4.43 228 2001 10 498.03 12.18 35 2001 11 494.46 6.73 706 2001 12 514.06 9.10 433 2002 1 534.03 51.61 53 2002 2 545.68 14.72 428 2002 3 554.35 11.70 80 2002 4 nan nan 0 2002 5 nan nan 0 2002 6 nan nan 0 2002 7 nan nan 0 2002 8 nan nan 0 2002 9 nan nan 0 2002 10 nan nan 0 2002 11 nan nan 0 2002 12 nan nan 0 2003 1 554.24 5.64 329 2003 2 563.57 7.32 567 2003 3 557.53 7.27 712 2003 4 549.21 10.32 628 2003 5 545.30 15.55 639 2003 6 522.11 20.22 249 2003 7 486.75 26.94 600 2003 8 470.45 23.92 392 2003 9 466.03 25.55 22 2003 10 nan nan 0 2003 11 nan nan 0 2003 12 538.75 6.09 487 2004 1 538.94 7.44 447 2004 2 552.74 7.33 468 2004 3 552.06 11.09 79 2004 4 556.92 6.60 272 2004 5 548.16 11.54 88 2004 6 506.57 12.42 104 2004 7 493.30 10.01 641 2004 8 473.91 10.46 521 2004 9 461.62 8.42 700 2004 10 473.65 9.77 317 2004 11 492.80 4.29 582 2004 12 512.92 4.28 408 2005 1 533.27 4.92 662 2005 2 547.63 4.40 663 2005 3 552.13 4.33 731 2005 4 555.64 4.77 665 2005 5 546.59 8.66 705 2005 6 520.51 6.15 709 2005 7 490.68 8.28 701 2005 8 472.88 12.40 671 2005 9 460.40 13.83 403 2005 10 480.28 7.49 424 2005 11 490.54 4.15 709 2005 12 509.45 4.00 721 2006 1 521.18 3.91 731 2006 2 532.07 3.96 624 2006 3 539.63 4.89 720 2006 4 546.68 4.88 386 2006 5 526.26 7.29 566 2006 6 505.83 5.20 639 2006 7 472.82 4.85 587 2006 8 451.05 3.61 701 2006 9 444.58 6.21 676 2006 10 459.60 6.69 658 2006 11 491.53 9.64 696 2006 12 506.37 8.27 680 2007 1 518.71 10.09 696 2007 2 535.47 7.63 656 2007 3 542.95 9.50 667 2007 4 548.56 9.87 507 2007 5 530.71 8.66 298 2007 6 509.28 6.43 588 2007 7 479.54 6.90 707 2007 8 472.47 10.85 404 2007 9 nan nan 0 2007 10 483.13 14.38 241 2007 11 492.06 11.60 544 2007 12 523.16 9.63 684 2008 1 536.67 16.80 314 2008 2 564.34 21.45 167 2008 3 562.52 6.00 684 2008 4 550.12 6.87 713 2008 5 547.93 8.21 698 2008 6 519.73 10.11 716 2008 7 482.10 9.91 727 2008 8 464.39 9.85 713 2008 9 453.22 5.50 637 2008 10 460.73 4.16 640 2008 11 477.93 10.63 511 2008 12 526.39 3.97 728 2009 1 538.21 5.51 513 2009 2 nan nan 0 2009 3 nan nan 0 2009 4 534.89 8.17 224 2009 5 535.13 4.67 692 2009 6 512.36 3.93 661 2009 7 492.07 4.24 738 2009 8 467.88 4.42 715 2009 9 457.17 4.79 648 2009 10 463.00 4.15 746 2009 11 487.92 4.18 720 2009 12 517.41 4.41 660 2010 1 532.27 9.32 434 2010 2 nan nan 0 2010 3 nan nan 0 2010 4 538.37 11.20 530 2010 5 531.26 4.13 632 2010 6 504.50 4.45 719 2010 7 470.42 4.12 654 2010 8 448.08 3.93 746 2010 9 451.37 5.65 716 2010 10 493.32 5.60 604 2010 11 522.80 4.58 602 2010 12 546.91 3.80 696 2011 1 574.76 4.21 703 2011 2 579.49 4.08 673 2011 3 576.56 3.71 739 2011 4 563.13 4.06 567 2011 5 540.61 5.56 469 2011 6 515.17 4.02 652 2011 7 484.09 4.17 728 2011 8 460.23 4.11 746 2011 9 464.14 3.72 722 2011 10 471.66 3.60 739 2011 11 495.21 5.06 655 2011 12 530.08 6.67 665 2012 1 547.08 5.69 743 2012 2 549.28 7.04 674 2012 3 554.35 6.56 729 2012 4 556.21 6.86 702 2012 5 547.84 4.96 502 2012 6 505.23 4.57 586 2012 7 476.91 3.77 502 2012 8 477.19 3.47 418 2012 9 nan nan 0 2012 10 nan nan 0 2012 11 nan nan 0 2012 12 513.28 6.58 76 2013 1 532.12 7.56 299 2013 2 536.84 11.41 474 2013 3 547.63 12.80 636 2013 4 556.93 6.40 472 2013 5 548.30 3.64 657 2013 6 529.02 4.10 715 2013 7 491.89 4.29 707 2013 8 470.02 4.21 694 2013 9 448.73 5.80 688 2013 10 456.68 3.90 726 2013 11 477.48 3.98 721 2013 12 493.75 3.94 741 2014 1 512.44 3.88 485 2014 2 521.32 3.73 605 2014 3 528.37 3.90 643 2014 4 526.90 3.85 703 2014 5 538.27 4.25 705 2014 6 501.58 3.98 619 2014 7 478.64 3.68 739 2014 8 448.01 3.70 730 2014 9 451.40 3.77 695 2014 10 464.92 2.97 127 2014 11 502.55 2.92 371 2014 12 509.23 2.69 726 2015 1 521.71 3.32 742 2015 2 530.79 3.49 670 2015 3 535.43 3.14 741 2015 4 541.56 3.42 690 2015 5 532.78 3.13 744 2015 6 504.16 3.42 714 2015 7 465.11 3.78 739 2015 8 462.19 3.58 746 2015 9 455.96 3.55 721 2015 10 469.18 2.99 615 2015 11 486.57 2.69 315 2015 12 498.50 2.78 743 2016 1 520.42 2.72 735 2016 2 529.65 2.58 697 2016 3 534.99 2.67 723 2016 4 540.04 2.74 700 2016 5 531.66 3.06 743 2016 6 509.37 3.23 705 2016 7 466.91 3.26 745 2016 8 443.11 3.18 495 2016 9 438.70 3.12 43 2016 10 461.98 2.24 741 2016 11 477.56 2.16 722 2016 12 486.27 2.11 453 2017 1 nan nan 0 2017 2 nan nan 0 2017 3 nan nan 0 2017 4 520.88 3.26 451 2017 5 514.30 3.70 630 2017 6 489.79 3.34 560 2017 7 456.19 4.60 536 2017 8 432.42 3.56 616 2017 9 429.09 3.18 570 2017 10 435.68 2.93 526 2017 11 457.29 2.43 538 2017 12 501.13 2.48 727 2018 1 529.94 2.88 215 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