# file: spo_F11_MM.dat # # Chlorofluorocarbon-11 (F11) 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: # Chlorofluorocarbon-11 data from the NOAA/ESRL halocarbons in situ program. # # Calibration scale used: NOAA 2016 # # 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 # F11ritsSPOyr F11ritsSPOmon F11ritsSPOm F11ritsSPOsd F11ritsSPOn 1988 2 226.778 2.316 17 1988 3 226.751 2.362 105 1988 4 228.058 1.446 69 1988 5 nan nan 0 1988 6 nan nan 0 1988 7 231.760 4.648 144 1988 8 232.599 4.217 44 1988 9 235.019 3.541 54 1988 10 234.832 2.350 21 1988 11 236.474 1.693 41 1988 12 nan nan 0 1989 1 238.201 4.630 68 1989 2 238.488 1.210 36 1989 3 239.437 1.320 344 1989 4 240.939 1.007 325 1989 5 242.139 1.259 225 1989 6 243.724 1.185 302 1989 7 244.785 1.042 139 1989 8 246.083 1.092 109 1989 9 246.904 0.864 12 1989 10 248.983 1.895 124 1989 11 248.172 1.831 227 1989 12 248.619 3.886 213 1990 1 248.510 3.022 62 1990 2 248.359 1.902 272 1990 3 249.265 1.511 535 1990 4 249.948 1.574 245 1990 5 251.282 1.805 65 1990 6 251.973 1.516 413 1990 7 253.120 1.529 584 1990 8 253.865 1.603 726 1990 9 254.758 1.655 674 1990 10 255.591 1.836 564 1990 11 255.846 2.058 673 1990 12 255.962 2.476 241 1991 1 256.630 1.913 398 1991 2 256.980 2.242 483 1991 3 257.100 1.658 703 1991 4 257.097 2.078 357 1991 5 258.012 1.280 624 1991 6 258.696 1.009 631 1991 7 259.322 1.219 594 1991 8 260.447 1.510 578 1991 9 261.804 1.321 685 1991 10 261.339 1.211 517 1991 11 261.300 1.113 211 1991 12 261.770 0.847 62 1992 1 261.434 0.783 297 1992 2 261.673 0.825 540 1992 3 261.812 0.874 507 1992 4 262.110 1.531 392 1992 5 261.516 1.634 188 1992 6 262.716 0.878 640 1992 7 263.219 0.825 394 1992 8 263.479 0.869 681 1992 9 263.623 1.058 523 1992 10 263.839 0.985 596 1992 11 264.048 0.938 152 1992 12 264.349 2.552 36 1993 1 264.034 1.944 417 1993 2 263.890 1.390 616 1993 3 263.882 1.373 620 1993 4 263.653 1.310 687 1993 5 263.470 1.257 713 1993 6 263.721 1.193 663 1993 7 264.080 1.167 713 1993 8 264.349 1.411 680 1993 9 264.893 1.969 591 1993 10 264.618 1.549 367 1993 11 264.487 1.713 419 1993 12 264.554 1.865 678 1994 1 264.142 2.130 269 1994 2 263.860 1.260 486 1994 3 263.883 1.285 374 1994 4 263.637 1.249 606 1994 5 263.473 1.539 695 1994 6 263.879 1.297 607 1994 7 263.871 1.350 486 1994 8 264.393 1.294 696 1994 9 264.416 1.068 611 1994 10 264.386 1.310 489 1994 11 264.345 1.401 713 1994 12 264.012 1.709 726 1995 1 264.048 1.668 527 1995 2 263.747 1.664 527 1995 3 264.009 1.822 653 1995 4 263.398 0.936 478 1995 5 263.215 0.982 683 1995 6 263.376 1.077 706 1995 7 263.647 1.005 693 1995 8 263.638 0.932 723 1995 9 263.742 0.942 705 1995 10 263.695 0.977 642 1995 11 263.582 1.021 697 1995 12 263.573 1.386 705 1996 1 263.488 1.441 586 1996 2 263.178 1.076 687 1996 3 263.024 1.108 733 1996 4 262.657 1.156 714 1996 5 262.856 1.110 734 1996 6 262.711 1.170 684 1996 7 262.963 1.035 739 1996 8 263.005 1.082 736 1996 9 262.899 1.082 694 1996 10 262.963 1.455 723 1996 11 263.037 1.148 690 1996 12 262.431 1.106 732 1997 1 262.109 1.356 554 1997 2 261.642 1.412 579 1997 3 261.442 1.189 734 1997 4 261.265 1.354 670 1997 5 261.082 1.265 698 1997 6 261.229 1.141 672 1997 7 261.507 1.100 738 1997 8 261.427 1.102 716 1997 9 261.283 1.113 640 1997 10 261.118 1.112 514 1997 11 260.752 1.120 640 1997 12 260.519 1.297 688 1998 1 260.160 1.420 593 1998 2 260.320 1.183 509 1998 3 259.856 1.555 711 1998 4 259.467 1.450 690 1998 5 259.625 1.376 670 1998 6 260.013 1.285 706 1998 7 260.140 1.021 711 1998 8 260.217 1.052 667 1998 9 260.247 1.068 712 1998 10 260.204 0.931 639 1998 11 260.125 1.774 594 1998 12 259.498 1.835 680 1999 1 259.763 2.283 674 1999 2 259.511 1.309 609 1999 3 259.338 1.666 710 1999 4 259.108 1.932 605 1999 5 258.432 1.731 706 1999 6 258.736 1.887 712 1999 7 259.249 2.885 719 1999 8 259.366 3.097 704 1999 9 259.068 1.983 570 1999 10 258.504 1.920 361 1999 11 257.983 2.518 344 1999 12 257.713 2.896 641 2000 1 257.333 2.967 735 2000 2 257.585 3.184 646 2000 3 257.475 1.484 725 2000 4 257.061 1.150 689 2000 5 256.904 1.332 738 2000 6 256.806 1.120 712 2000 7 256.976 1.175 724 2000 8 256.950 1.482 620 2000 9 256.975 1.144 712 2000 10 256.954 2.448 731 2000 11 256.562 1.802 663