# file: spo_MC_MM.dat # # Methyl Chloroform (MC) 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: # 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 # MCritsSPOyr MCritsSPOmon MCritsSPOm MCritsSPOsd MCritsSPOn 1989 7 109.648 1.124 131 1989 8 110.327 1.280 31 1989 9 nan nan 0 1989 10 105.790 1.256 117 1989 11 107.648 2.040 170 1989 12 106.718 1.394 146 1990 1 nan nan 0 1990 2 111.248 2.404 155 1990 3 109.504 1.265 496 1990 4 109.642 1.593 242 1990 5 109.944 1.202 40 1990 6 110.844 0.854 372 1990 7 111.990 1.021 601 1990 8 112.135 1.277 690 1990 9 113.141 0.979 637 1990 10 113.284 0.792 552 1990 11 112.540 0.679 436 1990 12 112.349 1.451 230 1991 1 113.222 1.987 299 1991 2 112.734 0.808 411 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 1 114.796 1.371 307 1992 2 115.030 0.693 351 1992 3 115.752 0.671 291 1992 4 nan nan 0 1992 5 nan nan 0 1992 6 117.559 0.860 608 1992 7 119.507 1.297 335 1992 8 119.246 0.818 604 1992 9 119.164 0.650 651 1992 10 119.860 1.256 571 1992 11 119.480 1.111 194 1992 12 116.845 0.819 145 1993 1 116.258 1.324 183 1993 2 115.563 0.468 244 1993 3 115.803 0.762 299 1993 4 115.970 1.140 318 1993 5 116.266 1.759 626 1993 6 116.629 1.732 680 1993 7 117.485 1.944 644 1993 8 116.703 1.206 602 1993 9 116.709 1.133 612 1993 10 115.466 0.750 427 1993 11 114.303 0.905 346 1993 12 113.243 0.860 559 1994 1 111.790 0.839 250 1994 2 111.071 0.816 452 1994 3 109.315 0.448 311 1994 4 108.886 0.394 582 1994 5 108.601 0.393 594 1994 6 108.481 0.690 592 1994 7 109.021 0.455 479 1994 8 109.017 0.476 611 1994 9 108.733 0.573 578 1994 10 108.341 0.535 499 1994 11 107.688 0.912 637 1994 12 105.011 0.595 713 1995 1 104.253 0.894 508 1995 2 103.315 0.713 571 1995 3 102.768 1.353 559 1995 4 101.070 0.423 410 1995 5 100.118 0.579 624 1995 6 99.240 0.642 627 1995 7 98.976 0.369 639 1995 8 98.793 0.338 688 1995 9 98.452 0.383 660 1995 10 97.494 0.430 539 1995 11 96.025 0.626 614 1995 12 94.528 0.751 674 1996 1 92.975 0.919 586 1996 2 91.790 0.473 686 1996 3 90.751 0.443 731 1996 4 89.682 0.375 715 1996 5 89.218 0.337 736 1996 6 88.703 0.410 657 1996 7 88.059 0.334 738 1996 8 87.527 0.371 737 1996 9 86.905 0.354 617 1996 10 86.045 0.654 90 1996 11 84.713 0.443 436 1996 12 83.053 0.488 571 1997 1 81.968 0.466 559 1997 2 80.888 0.390 605 1997 3 79.729 0.432 737 1997 4 78.721 0.396 687 1997 5 78.046 0.297 703 1997 6 77.371 0.365 672 1997 7 76.978 0.280 737 1997 8 76.257 0.403 716 1997 9 75.515 0.407 639 1997 10 74.595 0.405 514 1997 11 73.035 0.578 640 1997 12 71.977 0.465 698 1998 1 70.841 0.408 514 1998 2 69.544 0.576 454 1998 3 68.370 0.653 672 1998 4 67.527 0.990 651 1998 5 66.689 1.014 644 1998 6 66.238 0.469 661 1998 7 65.792 0.482 702 1998 8 65.289 0.541 651 1998 9 64.627 0.759 688 1998 10 63.776 0.570 638 1998 11 62.797 0.512 594 1998 12 61.559 0.406 666 1999 1 60.221 0.523 674 1999 2 59.030 0.568 611 1999 3 58.181 0.387 713 1999 4 57.320 0.297 694 1999 5 56.665 0.371 713 1999 6 55.997 0.315 712 1999 7 55.565 0.277 719 1999 8 55.123 0.306 698 1999 9 54.716 0.413 691 1999 10 54.079 0.610 549 1999 11 52.886 0.460 345 1999 12 51.754 0.421 642 2000 1 50.797 0.523 735 2000 2 49.828 0.404 646 2000 3 49.031 0.482 728 2000 4 48.063 0.461 659 2000 5 47.317 0.394 738 2000 6 46.855 0.321 710 2000 7 46.434 0.410 726 2000 8 46.041 0.339 621 2000 9 44.231 0.536 711 2000 10 44.335 0.388 731 2000 11 45.073 0.557 662