# file: brw_MC_MM.dat # # Methyl Chloroform (MC) 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 Radiatively Important Trace # Species (RITS) program. The RITS program started in 1983 and continued # until 2000. A detailed history of the RITS program can be found at # http://www.esrl.noaa.gov/gmd/hats/insitu/insitu.html # # PIs: Dr. James W. Elkins, Dr. Bradley D. Hall, J. David Nance # # National Oceanic and Atmospheric Administration (NOAA) # Earth System Research Laboratory (ESRL) # 325 Broadway, R/GMD1 # Boulder, CO 80305-3328 # # 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. Please contact the PIs for more information. # # The data should be cited in presentations or publications as the flowing: # Methyl Chloroform data from the NOAA/ESRL halocarbons in situ program. # # Calibration scale used: NOAA 2003 # # More information about the calibration scale can be found at: # http://www.esrl.noaa.gov/gmd/ccl/ # # The RITS GCs sampled once per hour from the early 1990s onward. # Monthly-averaged data are provided in parts-per-trillion (ppt). # # Abbreviations: # yr year # mon month # min minute # m daily/monthly median concentration (or hourly value) # sd standard deviation # n number of samples # brw Barrow, Alaska # nwr Niwot Ridge, Colorado # mlo Mauna Loa, Hawaii # smo Cape Matatula, American Samoa # spo South Pole, Antarctica # nan not-a-number (missing data) # # year, mon, concentration in ppt, std. dev, number of samples # MCritsBRWyr MCritsBRWmon MCritsBRWm MCritsBRWsd MCritsBRWn 1989 5 148.673 1.170 157 1989 6 148.538 1.537 203 1989 7 146.249 2.474 232 1989 8 143.298 2.107 137 1989 9 146.289 1.209 78 1989 10 145.753 1.779 251 1989 11 147.761 2.547 316 1989 12 149.180 2.461 229 1990 1 154.245 nan 1 1990 2 nan nan 0 1990 3 nan nan 0 1990 4 nan nan 0 1990 5 nan nan 0 1990 6 nan nan 0 1990 7 nan nan 0 1990 8 nan nan 0 1990 9 nan nan 0 1990 10 nan nan 0 1990 11 nan nan 0 1990 12 nan nan 0 1991 1 nan nan 0 1991 2 155.017 2.269 143 1991 3 156.628 3.705 555 1991 4 157.032 2.458 588 1991 5 156.844 2.400 610 1991 6 155.413 2.204 667 1991 7 154.474 2.312 563 1991 8 152.203 2.251 563 1991 9 149.942 2.687 507 1991 10 150.502 3.304 602 1991 11 152.894 3.086 480 1991 12 154.298 3.141 417 1992 1 155.706 2.303 424 1992 2 153.904 2.243 549 1992 3 154.258 2.294 329 1992 4 155.307 1.887 586 1992 5 155.616 2.249 672 1992 6 154.107 1.906 669 1992 7 152.740 1.893 611 1992 8 151.678 1.741 679 1992 9 150.121 1.481 660 1992 10 150.587 1.394 634 1992 11 151.102 1.626 613 1992 12 152.145 1.846 678 1993 1 151.142 1.887 563 1993 2 150.093 1.979 536 1993 3 150.085 1.486 635 1993 4 150.123 1.297 642 1993 5 149.299 1.695 670 1993 6 145.759 1.988 641 1993 7 142.260 1.703 650 1993 8 139.707 1.635 640 1993 9 136.227 1.252 690 1993 10 136.267 0.782 676 1993 11 135.959 0.895 592 1993 12 135.471 0.891 191 1994 1 134.462 1.106 637 1994 2 133.154 0.787 631 1994 3 132.962 0.866 691 1994 4 132.976 1.006 674 1994 5 130.822 0.767 678 1994 6 128.784 0.993 603 1994 7 125.686 1.513 678 1994 8 122.350 1.074 708 1994 9 121.327 0.789 645 1994 10 120.546 0.785 657 1994 11 119.777 1.009 659 1994 12 120.283 1.291 554 1995 1 119.572 1.050 642 1995 2 118.887 1.064 633 1995 3 119.085 1.373 663 1995 4 119.423 1.154 602 1995 5 116.881 0.935 716 1995 6 114.502 1.010 447 1995 7 112.138 1.114 689 1995 8 110.024 0.979 659 1995 9 107.183 1.196 592 1995 10 106.512 0.573 707 1995 11 106.231 0.766 703 1995 12 105.942 0.770 596 1996 1 104.681 1.084 673 1996 2 103.321 1.445 590 1996 3 103.607 1.372 681 1996 4 102.547 0.815 669 1996 5 101.161 1.218 587 1996 6 99.041 1.147 598 1996 7 96.835 0.904 617 1996 8 94.749 0.902 693 1996 9 92.739 0.880 633 1996 10 91.331 0.778 647 1996 11 90.437 0.754 667 1996 12 90.019 0.829 714 1997 1 89.527 0.963 673 1997 2 88.590 0.870 609 1997 3 87.904 0.876 698 1997 4 86.615 1.041 633 1997 5 85.054 0.979 738 1997 6 83.236 1.117 681 1997 7 81.072 1.215 718 1997 8 79.236 1.126 682 1997 9 77.966 0.992 503 1997 10 nan nan 0 1997 11 74.532 1.108 254 1997 12 74.921 1.209 500 1998 1 74.804 1.373 611 1998 2 nan nan 0 1998 3 nan nan 0 1998 4 nan nan 0 1998 5 72.176 1.104 696 1998 6 70.676 1.635 609 1998 7 68.273 1.321 711 1998 8 66.763 1.330 731 1998 9 65.555 1.380 638 1998 10 64.821 1.312 710 1998 11 63.937 1.021 554 1998 12 62.799 2.107 693 1999 1 62.311 2.071 699 1999 2 61.904 2.031 401