# file: smo_MC_MM.dat # # Methyl Chloroform (MC) 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: # 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 # MCritsSMOyr MCritsSMOmon MCritsSMOm MCritsSMOsd MCritsSMOn 1990 5 109.414 1.521 639 1990 6 109.650 1.272 716 1990 7 110.024 1.425 533 1990 8 112.083 1.419 270 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 2 113.805 4.819 195 1991 3 115.051 2.491 675 1991 4 111.912 3.849 376 1991 5 114.729 2.578 601 1991 6 116.498 2.848 662 1991 7 117.572 2.163 689 1991 8 118.972 2.564 443 1991 9 121.071 1.559 586 1991 10 118.600 1.782 706 1991 11 118.076 1.496 186 1991 12 nan nan 0 1992 1 nan nan 0 1992 2 nan nan 0 1992 3 118.212 1.057 368 1992 4 119.436 1.208 630 1992 5 119.343 0.765 731 1992 6 120.564 0.956 676 1992 7 121.201 0.609 741 1992 8 121.818 0.874 642 1992 9 121.578 0.872 718 1992 10 120.806 0.871 741 1992 11 119.947 1.199 701 1992 12 120.170 2.365 699 1993 1 120.086 2.131 691 1993 2 118.450 3.182 667 1993 3 121.170 2.124 740 1993 4 119.562 2.353 704 1993 5 117.448 0.957 551 1993 6 118.125 0.732 596 1993 7 118.006 0.702 742 1993 8 118.620 0.879 680 1993 9 118.300 0.972 192 1993 10 nan nan 0 1993 11 116.588 1.463 115 1993 12 116.286 1.347 624 1994 1 114.838 1.987 584 1994 2 115.093 1.606 498 1994 3 112.544 1.557 683 1994 4 111.493 1.754 679 1994 5 110.127 0.802 690 1994 6 109.858 0.815 706 1994 7 109.540 0.834 647 1994 8 108.671 0.846 587 1994 9 107.736 0.899 656 1994 10 106.253 0.954 687 1994 11 104.696 1.045 675 1994 12 103.457 0.992 667 1995 1 101.727 1.206 591 1995 2 101.916 1.586 566 1995 3 101.544 1.031 285 1995 4 99.962 1.485 159 1995 5 100.048 1.641 427 1995 6 99.019 1.153 583 1995 7 98.105 1.499 627 1995 8 97.127 1.749 528 1995 9 96.276 1.940 639 1995 10 95.347 1.145 560 1995 11 94.302 1.584 665 1995 12 92.116 1.027 582 1996 1 92.072 0.984 635 1996 2 91.244 1.145 638 1996 3 89.894 1.194 696 1996 4 88.518 1.216 555 1996 5 87.829 1.148 690 1996 6 88.406 1.435 367 1996 7 87.800 1.271 498 1996 8 86.644 1.240 684 1996 9 85.474 2.204 609 1996 10 84.143 1.109 579 1996 11 82.155 0.702 657 1996 12 81.191 1.100 702 1997 1 79.484 1.154 679 1997 2 77.986 0.674 538 1997 3 78.724 1.388 659 1997 4 79.002 0.749 472 1997 5 78.535 1.549 635 1997 6 78.359 1.436 665 1997 7 76.483 1.254 536 1997 8 75.515 1.238 652 1997 9 73.648 0.763 541 1997 10 72.036 1.333 234 1997 11 70.872 0.820 537 1997 12 70.168 0.543 96 1998 1 68.177 0.630 109 1998 2 66.925 0.740 577 1998 3 65.869 0.698 638 1998 4 65.150 0.474 678 1998 5 64.547 0.525 671 1998 6 63.940 0.533 637 1998 7 63.218 0.603 635 1998 8 62.259 0.686 621 1998 9 61.148 0.563 692 1998 10 59.889 0.818 726 1998 11 58.571 0.486 685 1998 12 58.063 0.829 632 1999 1 nan nan 0 1999 2 56.211 0.893 273 1999 3 55.323 0.530 367 1999 4 54.833 0.432 621 1999 5 54.262 0.394 637 1999 6 53.635 0.356 644 1999 7 53.078 0.395 529 1999 8 52.322 0.488 545 1999 9 51.639 0.531 619 1999 10 50.446 0.700 641 1999 11 49.079 0.511 650 1999 12 48.213 0.484 495 2000 1 47.404 0.484 544 2000 2 46.550 0.509 584 2000 3 45.994 0.520 675 2000 4 45.469 0.455 452