# file: spo_CCl4_MM.dat # # Carbon Tetrachloride (CCl4) data from hourly in situ samples analyzed on # a gas chromatograph located at South Pole (SPO) station Antarctica # (89.98 S, 24.80 W, elevation: 2810 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 # CCl4ritsSPOyr CCl4ritsSPOmon CCl4ritsSPOm CCl4ritsSPOsd CCl4ritsSPOn 1989 3 102.768 1.381 131 1989 4 103.210 1.581 210 1989 5 nan nan 0 1989 6 nan nan 0 1989 7 102.857 0.873 133 1989 8 103.255 1.042 70 1989 9 nan nan 0 1989 10 nan nan 0 1989 11 105.453 0.793 107 1989 12 103.152 2.017 151 1990 1 nan nan 0 1990 2 106.123 0.609 178 1990 3 106.520 0.575 528 1990 4 106.181 0.433 243 1990 5 106.425 1.166 58 1990 6 106.832 0.339 380 1990 7 106.709 0.351 606 1990 8 106.466 0.332 711 1990 9 106.640 0.364 647 1990 10 106.828 0.379 560 1990 11 106.826 0.279 447 1990 12 106.793 0.755 258 1991 1 107.006 0.716 281 1991 2 107.262 0.478 406 1991 3 nan nan 0 1991 4 nan nan 0 1991 5 nan nan 0 1991 6 nan nan 0 1991 7 nan nan 0 1991 8 nan nan 0 1991 9 nan nan 0 1991 10 nan nan 0 1991 11 nan nan 0 1991 12 nan nan 0 1992 1 107.626 0.560 270 1992 2 107.475 0.489 356 1992 3 107.008 0.336 291 1992 4 106.735 0.524 342 1992 5 106.573 0.448 142 1992 6 107.040 0.336 626 1992 7 106.987 0.344 374 1992 8 106.644 0.334 667 1992 9 106.508 0.362 675 1992 10 106.478 0.484 643 1992 11 106.767 0.481 195 1992 12 106.442 0.327 174 1993 1 106.640 0.530 267 1993 2 106.444 0.531 518 1993 3 106.271 0.539 630 1993 4 106.100 0.566 664 1993 5 105.949 0.704 716 1993 6 105.912 0.758 692 1993 7 105.905 0.599 669 1993 8 105.878 0.443 659 1993 9 106.160 0.466 665 1993 10 105.923 0.511 457 1993 11 105.868 0.443 410 1993 12 105.800 0.499 632 1994 1 105.142 0.255 258 1994 2 105.162 0.270 458 1994 3 105.461 0.340 386 1994 4 105.391 0.220 609 1994 5 104.893 0.259 700 1994 6 104.717 0.319 446 1994 7 104.762 0.380 493 1994 8 104.923 0.357 721 1994 9 104.531 0.339 630 1994 10 104.458 0.286 523 1994 11 104.560 0.328 711 1994 12 104.591 0.390 730 1995 1 104.563 0.432 546 1995 2 104.164 0.383 638 1995 3 104.304 0.453 489 1995 4 104.142 0.261 696 1995 5 103.848 0.259 679 1995 6 103.709 0.566 700 1995 7 103.646 0.242 692 1995 8 103.670 0.230 720 1995 9 103.670 0.276 705 1995 10 103.632 0.289 642 1995 11 103.538 0.263 709 1995 12 103.559 0.512 707 1996 1 103.773 0.719 576 1996 2 103.648 0.785 684 1996 3 103.701 0.465 731 1996 4 103.452 0.356 716 1996 5 103.445 0.455 736 1996 6 103.134 0.461 657 1996 7 102.900 0.367 738 1996 8 102.882 0.317 737 1996 9 102.731 0.382 709 1996 10 102.965 0.655 700 1996 11 102.773 0.371 692 1996 12 102.640 0.421 735 1997 1 102.497 0.438 559 1997 2 102.626 0.302 605 1997 3 102.422 0.289 737 1997 4 102.269 0.347 687 1997 5 102.144 0.279 703 1997 6 102.153 0.310 671 1997 7 102.108 0.356 737 1997 8 102.059 0.365 716 1997 9 101.817 0.301 638 1997 10 101.685 0.319 513 1997 11 101.568 0.258 639 1997 12 101.542 0.273 697 1998 1 101.424 0.333 588 1998 2 101.342 0.450 520 1998 3 101.283 0.352 369 1998 4 101.219 0.582 358 1998 5 101.070 0.634 369 1998 6 101.033 0.592 605 1998 7 100.948 0.656 658 1998 8 100.777 0.675 593 1998 9 100.801 0.758 581 1998 10 100.687 0.603 596 1998 11 100.720 0.518 581 1998 12 100.541 0.518 652 1999 1 100.586 0.574 673 1999 2 100.447 0.548 612 1999 3 100.299 0.552 710 1999 4 100.134 0.449 691 1999 5 100.055 0.380 712 1999 6 99.956 0.279 712 1999 7 99.935 0.397 718 1999 8 99.734 0.417 695 1999 9 99.677 0.641 691 1999 10 99.630 0.864 734 1999 11 99.541 0.658 691 1999 12 99.513 0.619 738 2000 1 99.391 0.747 735 2000 2 99.108 0.481 646 2000 3 98.921 0.742 728 2000 4 98.785 0.700 631 2000 5 98.562 0.588 738 2000 6 98.565 0.548 710 2000 7 98.600 0.665 726 2000 8 98.366 0.517 621 2000 9 98.054 0.466 709 2000 10 98.013 0.344 732 2000 11 98.388 0.724 660