# file: smo_CCl4_MM.dat # # Carbon Tetrachloride (CCl4) 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 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 # CCl4ritsSMOyr CCl4ritsSMOmon CCl4ritsSMOm CCl4ritsSMOsd CCl4ritsSMOn 1988 2 103.309 1.829 87 1988 3 104.702 1.060 161 1988 4 104.747 0.806 139 1988 5 104.343 0.672 197 1988 6 104.294 0.636 206 1988 7 104.161 0.684 197 1988 8 103.698 0.857 241 1988 9 103.490 0.836 231 1988 10 104.819 0.797 219 1988 11 105.700 0.594 150 1988 12 106.086 1.076 143 1989 1 106.627 0.740 157 1989 2 106.580 0.574 198 1989 3 106.275 0.842 178 1989 4 106.344 0.697 326 1989 5 106.379 0.712 305 1989 6 105.758 0.794 319 1989 7 105.837 0.714 348 1989 8 105.876 0.564 322 1989 9 105.940 0.553 338 1989 10 106.342 0.629 363 1989 11 106.535 0.693 351 1989 12 106.657 0.789 170 1990 1 107.179 0.746 357 1990 2 106.893 0.869 266 1990 3 107.352 0.875 279 1990 4 107.300 0.659 355 1990 5 106.848 0.526 689 1990 6 106.895 0.499 715 1990 7 106.587 0.520 552 1990 8 106.718 0.647 585 1990 9 106.965 0.659 625 1990 10 106.800 0.847 630 1990 11 107.479 1.477 300 1990 12 107.328 1.603 659 1991 1 108.004 0.997 363 1991 2 108.216 0.620 189 1991 3 107.745 0.559 675 1991 4 107.450 0.588 389 1991 5 107.239 0.615 612 1991 6 107.259 0.534 664 1991 7 107.044 0.525 664 1991 8 106.937 0.503 473 1991 9 106.950 0.412 598 1991 10 107.064 0.407 714 1991 11 107.148 0.404 673 1991 12 106.914 0.618 270 1992 1 107.332 0.352 303 1992 2 108.172 0.817 505 1992 3 107.871 0.613 722 1992 4 107.613 0.451 642 1992 5 107.483 0.390 735 1992 6 107.484 0.407 676 1992 7 107.527 0.306 741 1992 8 107.578 0.419 645 1992 9 107.469 0.490 716 1992 10 107.347 0.444 744 1992 11 107.096 0.540 719 1992 12 107.547 0.582 703 1993 1 107.388 0.576 706 1993 2 107.256 0.649 670 1993 3 107.650 0.561 741 1993 4 107.370 0.607 708 1993 5 106.565 0.639 549 1993 6 106.610 0.576 597 1993 7 106.397 0.429 743 1993 8 106.905 0.539 679 1993 9 106.805 0.626 193 1993 10 nan nan 0 1993 11 105.476 1.125 115 1993 12 105.994 1.052 627 1994 1 106.046 1.013 586 1994 2 106.234 0.917 497 1994 3 106.168 0.816 692 1994 4 106.168 0.717 679 1994 5 105.888 0.642 690 1994 6 105.590 0.677 709 1994 7 105.555 0.653 649 1994 8 105.718 0.958 584 1994 9 106.099 1.339 660 1994 10 105.957 1.306 689 1994 11 105.754 1.356 676 1994 12 106.116 1.091 671 1995 1 105.309 1.286 591 1995 2 106.078 0.891 566 1995 3 105.760 0.719 296 1995 4 105.932 1.099 161 1995 5 106.029 1.512 444 1995 6 105.663 1.151 586 1995 7 105.634 1.225 631 1995 8 105.095 1.011 530 1995 9 105.352 1.209 640 1995 10 104.833 1.101 560 1995 11 105.463 1.448 666 1995 12 105.156 0.924 582 1996 1 105.468 0.937 637 1996 2 105.255 0.899 641 1996 3 105.346 0.919 696 1996 4 104.773 1.011 552 1996 5 104.625 0.963 696 1996 6 103.962 1.230 597 1996 7 103.743 0.878 498 1996 8 103.541 0.700 640 1996 9 103.351 1.037 615 1996 10 103.322 0.744 582 1996 11 103.516 0.666 660 1996 12 103.485 0.696 705 1997 1 103.522 0.672 679 1997 2 103.383 0.530 538 1997 3 103.694 0.703 660 1997 4 103.873 0.598 488 1997 5 103.433 0.892 610 1997 6 103.403 0.867 662 1997 7 103.252 0.776 545 1997 8 102.569 0.819 687 1997 9 102.525 0.562 543 1997 10 102.406 0.573 402 1997 11 102.200 0.563 533 1997 12 101.985 0.627 92 1998 1 nan nan 0 1998 2 102.908 0.569 534 1998 3 102.909 0.579 642 1998 4 102.463 0.631 679 1998 5 102.474 0.545 672 1998 6 102.419 0.550 638 1998 7 102.181 0.696 635 1998 8 101.996 0.742 597 1998 9 101.762 0.530 692 1998 10 101.601 0.422 726 1998 11 101.815 0.392 691 1998 12 101.849 1.010 546 1999 1 nan nan 0 1999 2 101.944 0.985 272 1999 3 101.314 0.425 326 1999 4 101.334 0.422 621 1999 5 101.092 0.541 637 1999 6 101.105 0.451 645 1999 7 100.943 0.347 529 1999 8 100.892 0.334 545 1999 9 100.586 0.398 619 1999 10 100.537 0.377 641 1999 11 100.597 0.405 650 1999 12 100.747 0.377 495 2000 1 100.730 0.361 544 2000 2 100.599 0.439 585 2000 3 100.610 0.438 675 2000 4 100.492 0.354 454