# file: spo_F12_MM.dat # # Chlorofluorocarbon-12 (F12) 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-12 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 # F12ritsSPOyr F12ritsSPOmon F12ritsSPOm F12ritsSPOsd F12ritsSPOn 1988 2 406.923 6.058 66 1988 3 412.500 3.985 217 1988 4 417.217 1.342 92 1988 5 nan nan 0 1988 6 nan nan 0 1988 7 420.417 5.519 195 1988 8 424.038 2.913 56 1988 9 430.103 5.117 89 1988 10 430.721 3.025 178 1988 11 433.809 3.622 59 1988 12 nan nan 0 1989 1 434.610 5.175 65 1989 2 432.049 2.807 35 1989 3 435.712 1.852 340 1989 4 439.512 1.593 319 1989 5 441.332 1.712 227 1989 6 444.038 1.735 302 1989 7 446.694 1.214 138 1989 8 448.848 1.198 109 1989 9 450.224 1.255 35 1989 10 451.484 1.611 143 1989 11 452.115 2.938 287 1989 12 453.775 2.820 218 1990 1 454.387 1.783 62 1990 2 455.990 2.190 271 1990 3 458.261 1.773 524 1990 4 459.327 1.875 241 1990 5 462.412 5.918 64 1990 6 463.536 1.751 405 1990 7 465.109 1.860 572 1990 8 465.298 1.687 13 1990 9 469.589 3.739 84 1990 10 470.273 5.248 501 1990 11 471.846 4.996 599 1990 12 471.398 2.909 210 1991 1 473.106 2.857 381 1991 2 474.024 2.415 456 1991 3 474.670 2.952 538 1991 4 475.668 6.386 163 1991 5 477.597 3.477 566 1991 6 478.598 1.760 630 1991 7 480.111 2.118 599 1991 8 481.900 2.065 576 1991 9 483.967 2.010 683 1991 10 484.637 1.315 516 1991 11 485.467 1.295 213 1991 12 486.406 1.072 62 1992 1 486.462 0.953 297 1992 2 486.961 0.961 534 1992 3 487.906 1.034 507 1992 4 489.909 1.492 96 1992 5 nan nan 0 1992 6 491.274 1.086 640 1992 7 492.295 1.185 394 1992 8 493.173 1.208 681 1992 9 493.654 1.823 523 1992 10 494.870 1.792 596 1992 11 495.587 1.119 151 1992 12 497.344 4.965 36 1993 1 496.302 2.132 446 1993 2 495.886 2.323 570 1993 3 496.169 2.428 559 1993 4 496.721 3.333 553 1993 5 498.514 3.646 666 1993 6 498.316 3.170 625 1993 7 499.240 4.492 659 1993 8 500.153 3.163 614 1993 9 501.783 2.634 589 1993 10 501.618 1.878 405 1993 11 501.962 1.619 406 1993 12 501.848 2.699 619 1994 1 502.322 3.454 258 1994 2 502.528 1.689 484 1994 3 502.877 1.787 311 1994 4 503.523 1.666 588 1994 5 503.959 2.130 640 1994 6 504.897 1.926 603 1994 7 505.310 1.900 492 1994 8 506.813 2.124 652 1994 9 507.620 1.626 579 1994 10 508.138 2.508 517 1994 11 508.358 2.215 710 1994 12 508.065 2.374 703 1995 1 508.762 2.391 546 1995 2 509.115 2.570 635 1995 3 509.444 1.565 465 1995 4 509.741 1.399 478 1995 5 510.085 1.311 682 1995 6 511.083 1.365 706 1995 7 511.745 1.432 690 1995 8 512.325 1.265 723 1995 9 512.872 1.284 705 1995 10 513.618 1.435 642 1995 11 513.855 1.497 698 1995 12 514.036 1.420 701 1996 1 513.720 1.518 587 1996 2 514.311 1.555 687 1996 3 514.607 1.380 733 1996 4 514.947 1.398 714 1996 5 515.688 1.420 735 1996 6 516.310 1.403 684 1996 7 517.103 1.433 739 1996 8 517.699 1.392 737 1996 9 518.034 1.392 697 1996 10 518.675 1.613 734 1996 11 519.087 1.302 691 1996 12 519.023 1.429 734 1997 1 518.769 1.478 555 1997 2 518.499 1.900 604 1997 3 518.551 1.703 733 1997 4 519.144 1.762 678 1997 5 520.218 1.473 698 1997 6 521.104 1.564 672 1997 7 521.755 1.710 692 1997 8 522.187 1.550 715 1997 9 522.292 1.435 640 1997 10 522.259 1.419 514 1997 11 522.417 1.339 640 1997 12 522.356 1.657 695 1998 1 522.060 1.847 605 1998 2 523.495 2.293 574 1998 3 523.190 1.609 732 1998 4 522.155 1.480 712 1998 5 522.746 1.540 719 1998 6 523.429 1.469 711 1998 7 523.964 1.224 710 1998 8 524.620 1.295 667 1998 9 525.344 1.208 713 1998 10 526.003 1.124 640 1998 11 525.377 3.031 595 1998 12 524.585 3.197 680 1999 1 525.088 4.255 675 1999 2 525.099 2.423 611 1999 3 524.707 3.445 712 1999 4 524.704 4.587 610 1999 5 525.444 2.393 700 1999 6 527.129 2.637 709 1999 7 528.779 4.624 717 1999 8 529.611 5.073 704 1999 9 530.149 3.118 690 1999 10 530.801 2.979 730 1999 11 531.737 3.851 690 1999 12 531.728 4.802 738 2000 1 531.788 4.101 734 2000 2 531.737 4.766 645 2000 3 531.336 2.191 725 2000 4 531.250 1.532 689 2000 5 531.384 1.576 738 2000 6 531.603 1.296 712 2000 7 531.956 1.566 722 2000 8 532.680 1.817 619 2000 9 532.895 1.304 712 2000 10 532.991 3.291 733 2000 11 532.806 2.647 666