# file: brw_CCl4_MM.dat # # Carbon Tetrachloride (CCl4) 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: # Carbon Tetrachloride data from the NOAA/ESRL halocarbons in situ program. # # Calibration scale used: NOAA 2008 # # 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 # CCl4ritsBRWyr CCl4ritsBRWmon CCl4ritsBRWm CCl4ritsBRWsd CCl4ritsBRWn 1988 3 108.102 1.526 101 1988 4 108.969 1.623 221 1988 5 108.588 1.391 170 1988 6 107.613 0.991 196 1988 7 107.949 1.143 124 1988 8 108.563 0.853 237 1988 9 108.400 0.640 225 1988 10 108.484 0.678 203 1988 11 108.867 0.801 221 1988 12 109.278 1.069 186 1989 1 109.793 1.817 195 1989 2 109.584 1.049 181 1989 3 109.824 1.055 242 1989 4 110.552 0.932 153 1989 5 110.468 0.982 224 1989 6 111.966 1.055 212 1989 7 110.770 1.032 247 1989 8 110.324 0.747 139 1989 9 111.593 0.808 79 1989 10 111.938 1.079 246 1989 11 112.225 1.320 325 1989 12 112.733 1.300 233 1990 1 113.911 1.422 347 1990 2 113.728 1.413 288 1990 3 113.623 1.350 148 1990 4 nan nan 0 1990 5 112.081 0.814 695 1990 6 111.913 0.526 631 1990 7 111.720 0.617 617 1990 8 111.220 1.085 313 1990 9 111.360 0.768 651 1990 10 111.782 0.355 730 1990 11 112.198 0.764 594 1990 12 112.744 1.197 706 1991 1 113.385 1.582 508 1991 2 113.180 1.739 555 1991 3 112.188 1.220 596 1991 4 111.672 1.150 598 1991 5 111.501 1.277 613 1991 6 111.002 1.245 683 1991 7 110.965 1.177 577 1991 8 110.398 1.232 572 1991 9 110.359 1.378 519 1991 10 110.762 1.531 598 1991 11 111.315 1.300 481 1991 12 111.725 1.267 552 1992 1 111.755 1.347 466 1992 2 111.578 1.207 580 1992 3 111.086 1.275 391 1992 4 110.886 1.059 586 1992 5 110.957 1.018 673 1992 6 110.748 0.889 672 1992 7 110.167 0.949 622 1992 8 110.195 0.903 698 1992 9 109.983 0.835 661 1992 10 110.419 0.855 644 1992 11 110.696 0.852 621 1992 12 110.982 0.904 523 1993 1 111.224 0.892 566 1993 2 110.831 0.912 555 1993 3 110.995 0.736 644 1993 4 110.651 0.684 646 1993 5 110.459 0.796 671 1993 6 109.973 0.812 639 1993 7 109.399 0.683 635 1993 8 108.469 0.326 410 1993 9 108.455 0.408 689 1993 10 108.977 0.428 682 1993 11 108.494 0.540 594 1993 12 107.547 1.571 188 1994 1 107.555 1.149 431 1994 2 107.823 0.770 622 1994 3 107.779 0.871 692 1994 4 108.283 0.971 684 1994 5 106.942 0.895 681 1994 6 107.245 0.712 606 1994 7 106.858 0.861 686 1994 8 106.649 0.652 713 1994 9 106.535 0.637 656 1994 10 106.600 0.702 661 1994 11 106.602 0.868 673 1994 12 106.721 0.761 496 1995 1 106.493 0.730 649 1995 2 106.543 0.737 655 1995 3 106.581 0.846 695 1995 4 105.632 0.688 611 1995 5 105.542 0.589 744 1995 6 105.789 0.738 454 1995 7 105.971 0.634 692 1995 8 105.715 0.439 664 1995 9 105.382 0.575 601 1995 10 105.487 0.495 738 1995 11 105.559 0.554 704 1995 12 105.935 0.615 601 1996 1 105.907 0.869 672 1996 2 106.099 1.193 602 1996 3 105.944 1.046 699 1996 4 105.603 0.623 667 1996 5 105.420 0.801 601 1996 6 105.112 0.708 600 1996 7 104.840 0.610 687 1996 8 104.455 0.630 698 1996 9 104.194 0.654 633 1996 10 104.469 0.766 652 1996 11 104.618 0.815 670 1996 12 104.936 0.748 620 1997 1 105.424 1.028 669 1997 2 105.009 0.910 609 1997 3 104.364 0.883 696 1997 4 103.752 0.849 635 1997 5 103.583 0.750 739 1997 6 103.564 0.787 681 1997 7 103.428 0.866 724 1997 8 103.302 0.844 675 1997 9 103.244 0.947 604 1997 10 103.688 0.951 738 1997 11 103.038 1.238 673 1997 12 102.071 1.054 565 1998 1 102.648 1.104 544 1998 2 nan nan 0 1998 3 nan nan 0 1998 4 nan nan 0 1998 5 102.924 1.051 698 1998 6 103.056 1.470 591 1998 7 103.533 1.383 711 1998 8 102.428 1.347 731 1998 9 102.119 1.375 638 1998 10 102.381 1.358 695 1998 11 102.333 0.968 554 1998 12 102.695 2.006 693 1999 1 102.034 2.213 649 1999 2 101.560 2.112 369