# file: smo_F12_MM.dat # # Chlorofluorocarbon-12 (F12) 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: # 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 # F12ritsSMOyr F12ritsSMOmon F12ritsSMOm F12ritsSMOsd F12ritsSMOn 1987 6 405.119 1.862 24 1987 7 407.849 2.853 110 1987 8 411.889 0.785 6 1987 9 414.926 1.926 171 1987 10 415.732 1.429 227 1987 11 418.459 2.045 186 1987 12 419.863 3.536 177 1988 1 422.835 4.641 131 1988 2 427.517 4.190 88 1988 3 425.298 3.628 162 1988 4 428.974 2.648 140 1988 5 426.522 2.119 196 1988 6 427.899 1.434 206 1988 7 429.137 1.964 199 1988 8 431.349 1.329 241 1988 9 432.458 1.999 232 1988 10 436.260 2.023 217 1988 11 439.975 1.902 149 1988 12 443.047 3.919 148 1989 1 445.595 2.182 159 1989 2 446.924 1.658 198 1989 3 445.846 3.159 178 1989 4 446.932 2.164 324 1989 5 448.490 2.321 306 1989 6 447.120 1.749 323 1989 7 448.839 1.816 350 1989 8 450.579 1.748 322 1989 9 452.424 1.626 338 1989 10 454.741 2.392 366 1989 11 456.404 2.949 352 1989 12 456.747 3.848 202 1990 1 459.530 2.640 359 1990 2 460.337 3.774 266 1990 3 462.510 3.402 278 1990 4 463.481 2.049 354 1990 5 463.562 1.101 692 1990 6 465.309 1.207 717 1990 7 465.779 1.329 556 1990 8 467.777 2.029 581 1990 9 470.535 2.084 606 1990 10 470.957 1.512 632 1990 11 473.738 2.190 300 1990 12 474.556 3.028 678 1991 1 477.087 1.655 352 1991 2 479.586 2.529 191 1991 3 478.265 1.478 684 1991 4 477.642 1.872 387 1991 5 478.208 2.245 611 1991 6 478.884 1.517 665 1991 7 479.464 1.578 675 1991 8 480.374 1.572 499 1991 9 481.970 1.479 602 1991 10 482.870 1.378 713 1991 11 484.932 1.767 674 1991 12 484.912 2.282 738 1992 1 486.976 2.065 391 1992 2 491.034 3.182 509 1992 3 490.639 2.453 722 1992 4 490.643 1.814 642 1992 5 491.409 1.497 734 1992 6 491.861 1.432 676 1992 7 493.223 1.204 742 1992 8 494.623 1.684 644 1992 9 495.778 1.729 718 1992 10 496.529 1.686 744 1992 11 496.450 1.636 719 1992 12 498.778 2.185 703 1993 1 499.284 2.129 706 1993 2 499.068 2.497 670 1993 3 501.127 1.654 742 1993 4 500.774 2.013 708 1993 5 498.911 1.783 554 1993 6 500.248 1.372 598 1993 7 500.308 1.481 742 1993 8 502.628 1.607 681 1993 9 503.288 1.524 370 1993 10 502.978 1.741 525 1993 11 503.910 1.896 528 1993 12 506.324 2.056 628 1994 1 506.965 2.171 587 1994 2 507.911 2.031 498 1994 3 507.911 2.189 693 1994 4 508.404 2.377 682 1994 5 507.668 2.298 694 1994 6 507.771 2.290 709 1994 7 508.591 2.254 648 1994 8 508.485 1.821 588 1994 9 509.977 1.519 660 1994 10 511.784 1.687 692 1994 11 511.707 1.993 668 1994 12 512.357 2.095 669 1995 1 511.321 2.289 593 1995 2 514.226 2.035 549 1995 3 514.156 2.288 468 1995 4 514.729 2.038 503 1995 5 515.179 1.586 260 1995 6 515.101 1.326 536 1995 7 515.959 1.313 527 1995 8 516.313 1.948 363 1995 9 516.692 1.520 629 1995 10 517.224 1.152 561 1995 11 518.320 1.337 668 1995 12 518.065 1.125 583 1996 1 520.841 1.037 638 1996 2 520.858 1.557 641 1996 3 521.065 1.273 695 1996 4 519.886 1.352 555 1996 5 520.546 1.473 629 1996 6 520.524 1.241 598 1996 7 520.653 1.059 497 1996 8 521.261 1.077 686 1996 9 521.488 1.256 627 1996 10 521.910 1.199 581 1996 11 523.422 1.087 660 1996 12 523.891 1.437 704 1997 1 525.233 1.629 679 1997 2 524.970 1.065 534 1997 3 526.246 1.454 660 1997 4 525.366 0.962 487 1997 5 524.713 1.039 618 1997 6 524.575 1.056 673 1997 7 525.351 1.211 546 1997 8 525.635 1.214 686 1997 9 526.233 1.172 554 1997 10 526.501 1.040 403 1997 11 526.404 1.066 545 1997 12 526.386 0.896 100 1998 1 528.152 2.170 550 1998 2 526.904 1.439 560 1998 3 527.403 2.701 597 1998 4 526.491 2.077 678 1998 5 527.131 1.146 672 1998 6 527.362 1.347 637 1998 7 527.452 1.426 631 1998 8 527.869 2.356 621 1998 9 528.695 3.534 692 1998 10 528.979 2.454 726 1998 11 529.979 3.058 690 1998 12 529.655 4.873 661 1999 1 529.583 6.014 618 1999 2 531.617 5.408 530 1999 3 530.693 1.802 719 1999 4 530.924 1.096 627 1999 5 530.787 1.192 638 1999 6 531.060 1.072 647 1999 7 531.169 1.118 531 1999 8 531.487 0.906 546 1999 9 531.363 1.126 620 1999 10 531.400 1.207 674 1999 11 532.037 1.181 649 1999 12 532.828 1.099 495 2000 1 533.087 1.073 547 2000 2 532.907 1.122 585 2000 3 533.206 1.206 643 2000 4 532.899 1.092 455