# file: brw_F11_MM.dat # # Chlorofluorocarbon-11 (F11) 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-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 # F11ritsBRWyr F11ritsBRWmon F11ritsBRWm F11ritsBRWsd F11ritsBRWn 1987 8 244.229 4.014 193 1987 9 245.675 4.188 192 1987 10 248.526 4.052 242 1987 11 250.642 3.727 195 1987 12 248.761 5.584 213 1988 1 250.854 6.439 228 1988 2 251.610 4.225 189 1988 3 252.622 7.819 119 1988 4 252.489 6.134 103 1988 5 251.053 8.099 174 1988 6 251.661 5.869 192 1988 7 251.777 4.819 122 1988 8 254.113 5.692 236 1988 9 255.805 6.635 161 1988 10 257.215 9.738 132 1988 11 260.407 5.860 186 1988 12 261.431 5.760 114 1989 1 260.685 5.577 215 1989 2 260.606 6.664 179 1989 3 260.945 5.895 235 1989 4 260.671 4.229 124 1989 5 260.392 2.039 214 1989 6 260.452 2.658 210 1989 7 260.798 2.268 246 1989 8 260.452 2.110 136 1989 9 262.202 1.409 79 1989 10 263.602 2.162 246 1989 11 264.708 4.095 309 1989 12 267.961 7.521 224 1990 1 268.808 5.495 355 1990 2 269.732 3.958 283 1990 3 266.713 5.758 207 1990 4 266.571 2.979 327 1990 5 266.363 1.828 699 1990 6 266.119 1.613 626 1990 7 265.859 1.890 597 1990 8 267.183 3.292 542 1990 9 266.771 1.998 610 1990 10 268.287 1.803 736 1990 11 269.724 2.654 596 1990 12 270.919 3.249 690 1991 1 271.282 2.902 477 1991 2 270.643 3.347 561 1991 3 270.031 2.593 574 1991 4 268.736 2.257 586 1991 5 268.691 1.298 612 1991 6 268.451 1.439 677 1991 7 268.593 1.382 574 1991 8 268.521 1.073 567 1991 9 268.645 1.040 507 1991 10 270.274 2.078 574 1991 11 271.012 2.954 476 1991 12 272.656 5.743 550 1992 1 272.601 7.624 472 1992 2 271.002 2.190 596 1992 3 271.259 2.604 393 1992 4 270.531 1.430 589 1992 5 270.924 1.732 667 1992 6 270.205 1.275 669 1992 7 269.858 2.380 550 1992 8 270.124 1.517 690 1992 9 269.944 0.962 661 1992 10 270.860 1.204 618 1992 11 271.224 1.904 614 1992 12 272.391 3.823 549 1993 1 272.172 5.119 576 1993 2 272.133 3.700 544 1993 3 271.870 2.275 650 1993 4 271.261 1.447 648 1993 5 270.676 0.997 664 1993 6 270.178 1.725 635 1993 7 270.027 1.628 653 1993 8 270.371 1.561 676 1993 9 270.088 1.191 685 1993 10 271.236 0.896 633 1993 11 271.644 1.224 499 1993 12 272.142 3.010 625 1994 1 272.207 3.284 434 1994 2 272.091 2.180 611 1994 3 273.107 2.219 691 1994 4 271.645 2.272 682 1994 5 269.445 1.299 676 1994 6 270.239 1.274 604 1994 7 269.531 1.389 652 1994 8 269.077 1.411 645 1994 9 269.119 1.370 643 1994 10 270.257 1.950 660 1994 11 270.427 3.482 649 1994 12 270.452 3.623 538 1995 1 269.150 1.650 635 1995 2 268.635 2.250 647 1995 3 268.874 3.083 594 1995 4 nan nan 0 1995 5 nan nan 0 1995 6 268.898 2.071 42 1995 7 268.189 2.081 687 1995 8 267.766 2.578 664 1995 9 268.460 2.096 647 1995 10 268.460 2.438 737 1995 11 268.460 2.629 704 1995 12 269.286 3.021 491 1996 1 268.865 2.716 91 1996 2 269.845 3.607 541 1996 3 269.230 2.164 705 1996 4 268.570 1.515 694 1996 5 268.101 1.486 638 1996 6 267.600 1.677 606 1996 7 266.416 1.822 682 1996 8 266.206 1.792 651 1996 9 265.930 1.594 632 1996 10 265.895 2.043 651 1996 11 266.852 1.907 666 1996 12 267.514 1.719 606 1997 1 268.261 2.128 605 1997 2 267.149 1.729 608 1997 3 266.584 1.839 467 1997 4 263.804 1.918 612 1997 5 263.754 1.742 737 1997 6 264.184 1.655 670 1997 7 263.826 1.460 718 1997 8 263.270 1.630 674 1997 9 264.660 1.942 604 1997 10 266.275 1.323 736 1997 11 265.570 1.358 415 1997 12 264.227 1.447 195 1998 1 264.095 2.057 607 1998 2 nan nan 0 1998 3 nan nan 0 1998 4 nan nan 0 1998 5 265.233 1.535 695 1998 6 264.592 1.744 606 1998 7 263.531 1.384 708 1998 8 263.165 1.221 730 1998 9 263.149 1.383 704 1998 10 263.278 1.162 705 1998 11 263.418 1.171 554 1998 12 263.676 1.298 689 1999 1 263.892 1.284 696 1999 2 263.355 1.460 400