# file: brw_F12_MM.dat # # Chlorofluorocarbon-12 (F12) data from hourly in situ samples analyzed on # a gas chromatograph located at Pt. Barrow (BRW), Alaska # (71.3 N, 156.6 W, elevation: 8 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 # F12ritsBRWyr F12ritsBRWmon F12ritsBRWm F12ritsBRWsd F12ritsBRWn 1987 8 438.491 3.312 192 1987 9 439.943 3.147 205 1987 10 443.675 3.123 241 1987 11 448.024 3.399 194 1987 12 448.749 4.623 212 1988 1 450.352 5.278 221 1988 2 452.579 6.077 201 1988 3 454.798 10.214 206 1988 4 454.671 9.857 168 1988 5 452.234 8.455 175 1988 6 452.919 6.410 197 1988 7 454.547 6.227 125 1988 8 457.331 5.136 239 1988 9 460.424 6.107 154 1988 10 464.244 5.503 97 1988 11 468.661 4.558 165 1988 12 470.011 5.487 173 1989 1 471.981 5.486 210 1989 2 469.827 5.371 175 1989 3 470.228 4.955 234 1989 4 471.776 4.965 150 1989 5 469.585 5.347 227 1989 6 469.370 5.010 222 1989 7 472.345 4.566 242 1989 8 471.936 5.011 141 1989 9 476.310 4.715 79 1989 10 480.157 4.728 253 1989 11 483.677 5.519 329 1989 12 487.111 8.447 226 1990 1 490.001 8.085 350 1990 2 490.443 7.222 288 1990 3 487.963 8.238 261 1990 4 487.199 4.262 343 1990 5 487.813 4.069 701 1990 6 487.698 3.520 627 1990 7 488.316 4.111 603 1990 8 491.346 4.157 553 1990 9 491.445 3.682 639 1990 10 493.800 3.924 735 1990 11 496.108 3.726 595 1990 12 499.058 4.687 710 1991 1 500.019 5.262 477 1991 2 499.662 5.899 549 1991 3 498.572 5.487 569 1991 4 497.626 4.632 588 1991 5 498.346 3.561 609 1991 6 498.861 3.799 678 1991 7 499.558 3.711 573 1991 8 501.337 3.761 578 1991 9 503.222 3.600 516 1991 10 506.396 4.869 599 1991 11 508.165 4.183 476 1991 12 510.125 6.090 546 1992 1 509.325 6.785 460 1992 2 508.995 4.895 602 1992 3 508.226 4.963 404 1992 4 508.002 3.697 588 1992 5 509.116 4.005 674 1992 6 508.282 3.739 676 1992 7 509.186 3.957 629 1992 8 510.433 3.523 699 1992 9 511.476 3.602 659 1992 10 513.524 3.752 643 1992 11 515.495 3.616 618 1992 12 516.918 4.611 684 1993 1 515.261 5.692 586 1993 2 516.546 5.486 557 1993 3 516.651 4.125 662 1993 4 515.270 3.405 648 1993 5 514.935 3.220 670 1993 6 515.001 3.110 660 1993 7 515.899 3.615 662 1993 8 516.997 4.317 684 1993 9 517.858 4.296 696 1993 10 520.198 4.922 680 1993 11 517.441 6.071 517 1993 12 516.720 5.126 635 1994 1 518.131 5.157 646 1994 2 519.066 4.490 635 1994 3 520.240 4.787 694 1994 4 521.988 4.118 685 1994 5 520.276 3.818 693 1994 6 520.272 3.541 607 1994 7 519.872 3.648 683 1994 8 520.124 3.451 712 1994 9 521.648 3.388 655 1994 10 521.261 5.129 662 1994 11 521.657 6.414 690 1994 12 522.554 6.738 580 1995 1 524.225 5.370 515 1995 2 523.310 4.417 655 1995 3 523.274 5.207 602 1995 4 nan nan 0 1995 5 nan nan 0 1995 6 nan nan 0 1995 7 nan nan 0 1995 8 524.888 5.613 660 1995 9 523.505 6.213 652 1995 10 525.227 6.982 738 1995 11 526.086 7.834 705 1995 12 528.849 11.106 594 1996 1 528.179 19.006 655 1996 2 527.361 7.778 580 1996 3 528.345 6.366 700 1996 4 526.728 5.870 693 1996 5 526.897 6.126 641 1996 6 526.499 5.663 616 1996 7 526.068 5.736 685 1996 8 524.827 5.823 655 1996 9 522.977 5.278 633 1996 10 524.981 5.725 650 1996 11 527.728 5.569 669 1996 12 529.190 5.672 715 1997 1 530.810 5.906 677 1997 2 529.693 5.784 603 1997 3 528.772 6.087 571 1997 4 nan nan 0 1997 5 525.831 5.495 346 1997 6 525.310 5.415 681 1997 7 525.903 5.589 723 1997 8 526.362 5.577 674 1997 9 528.186 6.103 637 1997 10 529.629 5.744 737 1997 11 528.195 5.821 674 1997 12 529.299 7.391 545 1998 1 530.929 6.244 736 1998 2 531.362 6.126 669 1998 3 530.841 6.321 738 1998 4 532.001 5.765 78 1998 5 531.984 6.796 716 1998 6 530.958 6.968 612 1998 7 531.285 6.493 710 1998 8 530.398 6.521 731 1998 9 531.218 6.697 640 1998 10 531.497 6.993 710 1998 11 531.536 7.109 555 1998 12 533.394 6.739 689 1999 1 535.097 6.940 698 1999 2 533.377 6.540 400