# file: NWR_F12_MM.dat # # Atmospheric measurements of F12 (Chloroflurocarbon-12) # Measurements are from the NOAA/ESRL/GMD/HATS original flask program # (http://www.esrl.noaa.gov/gmd/hats/flask/flasks.html). # Instrument ID: oldGC # # Location: NWR (Niwot Ridge, Colorado -- 40.05 N, 105.58 W, 3523 m Elev.) # See http://www.esrl.noaa.gov/gmd/dv/site/site_table.html#hats_flask for # more information about flask sampling sites. # # # The data reported are from flask samples collected approximately once per # week in matching, concurrent pairs and later analyzed on a gas chromatograph # with electron capture detection (GC-ECD) located in Boulder, Colorado, USA. # This GC was in operation from 1977 to 1995 when it was retired and replaced. # # (PIs) Dr. James W. Elkins, Dr. Bradley D. Hall # # Email: James.W.Elkins@noaa.gov; Bradley.Hall@noaa.gov # Phone: (303) 497-6224 (303) 497-7011 # Fax: (303) 497-6290 # # 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. # # The data should be cited in presentations or publications as the flowing: Chloroflurocarbon-12 data from # the NOAA/ESRL halocarbons original flask program. # # Calibration scale used: NOAA 2008 # # More information about the calibration scale can be found at: # http://www.esrl.noaa.gov/gmd/ccl/ # # Monthly mean data are provided in parts-per-trillion, ppt. # # Missing value: "nan" # # Data Columns: # yr Year # mon Month # m Monthly mean concentration of N2O in ppb # sd Standard deviation of the mean # n Number of samples # F12oldGCNWRyr F12oldGCNWRmon F12oldGCNWRm F12oldGCNWRsd F12oldGCNWRn 1977 1 nan nan 0 1977 2 nan nan 0 1977 3 nan nan 0 1977 4 nan nan 0 1977 5 nan nan 0 1977 6 nan nan 0 1977 7 253.5 3.7 2 1977 8 261.9 7.7 2 1977 9 nan nan 0 1977 10 nan nan 0 1977 11 nan nan 0 1977 12 276.6 11.6 3 1978 1 nan nan 0 1978 2 nan nan 0 1978 3 273.9 5.3 2 1978 4 nan nan 0 1978 5 nan nan 0 1978 6 nan nan 0 1978 7 294.7 6.4 4 1978 8 301.3 9.8 4 1978 9 nan nan 0 1978 10 290.6 8.4 2 1978 11 289.5 16.4 7 1978 12 nan nan 0 1979 1 277.5 7.3 8 1979 2 285.6 7.8 5 1979 3 nan nan 0 1979 4 nan nan 0 1979 5 291.5 8.1 6 1979 6 299.3 16.1 7 1979 7 289.1 7.4 6 1979 8 293.5 11.2 8 1979 9 305.1 11.0 4 1979 10 291.6 7.7 6 1979 11 294.3 6.4 3 1979 12 312.0 17.4 6 1980 1 318.0 16.2 4 1980 2 310.6 4.1 4 1980 3 314.4 3.1 2 1980 4 309.3 4.9 4 1980 5 315.9 12.4 6 1980 6 306.1 8.3 4 1980 7 323.8 30.2 6 1980 8 nan nan 0 1980 9 314.5 16.9 6 1980 10 310.2 4.8 8 1980 11 309.8 4.1 2 1980 12 313.7 11.6 10 1981 1 314.4 5.6 6 1981 2 313.9 7.1 8 1981 3 321.8 6.3 10 1981 4 322.9 8.3 6 1981 5 nan nan 0 1981 6 326.0 9.2 4 1981 7 329.0 6.4 8 1981 8 330.5 5.5 8 1981 9 331.6 7.7 8 1981 10 337.7 7.5 6 1981 11 329.0 7.3 6 1981 12 332.3 5.3 8 1982 1 335.8 9.0 6 1982 2 333.6 8.0 4 1982 3 336.9 6.7 8 1982 4 346.4 9.9 6 1982 5 339.4 7.2 6 1982 6 344.2 6.3 4 1982 7 351.5 10.3 6 1982 8 346.1 6.2 10 1982 9 346.9 4.9 5 1982 10 350.8 6.7 8 1982 11 350.7 6.8 6 1982 12 349.4 5.8 5 1983 1 352.0 6.7 8 1983 2 354.4 7.7 8 1983 3 356.0 8.5 6 1983 4 357.3 5.4 8 1983 5 361.2 9.6 8 1983 6 360.8 7.0 8 1983 7 373.0 7.0 4 1983 8 356.7 12.2 8 1983 9 368.3 10.0 6 1983 10 370.1 9.1 4 1983 11 371.6 7.6 10 1983 12 374.3 6.9 4 1984 1 372.6 11.6 6 1984 2 369.2 10.4 10 1984 3 366.9 7.0 6 1984 4 nan nan 0 1984 5 nan nan 0 1984 6 nan nan 0 1984 7 nan nan 0 1984 8 nan nan 0 1984 9 nan nan 0 1984 10 nan nan 0 1984 11 nan nan 0 1984 12 nan nan 0 1985 1 nan nan 0 1985 2 nan nan 0 1985 3 381.5 5.5 8 1985 4 380.5 8.2 10 1985 5 386.1 5.3 3 1985 6 389.8 11.9 6 1985 7 385.5 5.5 10 1985 8 392.2 8.0 8 1985 9 407.1 16.2 6 1985 10 404.6 14.1 8 1985 11 407.4 5.6 4 1985 12 401.1 7.8 8 1986 1 401.9 5.0 6 1986 2 401.6 8.9 4 1986 3 404.7 4.5 6 1986 4 403.1 7.4 7 1986 5 410.5 6.4 6 1986 6 411.0 6.0 6 1986 7 408.4 6.8 10 1986 8 413.3 5.3 5 1986 9 408.0 4.6 5 1986 10 414.9 4.7 5 1986 11 nan nan 0 1986 12 416.5 6.8 6 1987 1 419.0 9.7 4 1987 2 417.2 7.2 6 1987 3 429.6 5.7 4 1987 4 425.0 12.1 8 1987 5 nan nan 0 1987 6 426.4 10.2 4 1987 7 425.8 9.3 5 1987 8 425.2 7.7 5 1987 9 434.0 7.2 2 1987 10 437.4 5.3 8 1987 11 443.8 14.3 7 1987 12 454.3 6.0 10 1988 1 457.0 7.9 6 1988 2 453.1 6.6 8 1988 3 462.7 15.2 4 1988 4 nan nan 0 1988 5 463.5 6.3 8 1988 6 463.6 15.8 8 1988 7 nan nan 0 1988 8 471.1 6.1 8 1988 9 468.7 6.5 6 1988 10 465.6 4.0 6 1988 11 477.5 6.7 8 1988 12 469.6 10.9 8 1989 1 470.1 8.0 8 1989 2 474.9 4.6 6 1989 3 465.5 6.0 6 1989 4 472.9 6.7 8 1989 5 476.5 9.0 6 1989 6 477.4 8.1 6 1989 7 nan nan 0 1989 8 488.8 13.7 8 1989 9 484.3 7.5 8 1989 10 481.4 6.1 6 1989 11 498.5 20.3 8 1989 12 487.3 7.9 6 1990 1 486.6 6.6 10 1990 2 495.4 16.2 6 1990 3 493.0 13.5 8 1990 4 487.0 7.2 5 1990 5 492.6 7.7 9 1990 6 498.0 12.3 6 1990 7 491.9 7.6 6 1990 8 490.8 11.2 6 1990 9 501.8 13.5 4 1990 10 496.7 5.5 4 1990 11 500.4 8.4 8 1990 12 501.2 10.3 9 1991 1 500.2 7.4 4 1991 2 497.5 6.3 6 1991 3 495.9 6.6 8 1991 4 504.6 7.4 3 1991 5 495.7 7.7 4 1991 6 503.1 9.4 6 1991 7 505.3 6.7 6 1991 8 505.5 5.2 8 1991 9 511.1 7.0 7 1991 10 513.7 7.2 8 1991 11 507.1 6.8 7 1991 12 510.0 6.2 9 1992 1 514.3 10.2 5 1992 2 517.6 4.5 6 1992 3 517.5 8.2 9 1992 4 526.8 6.2 3 1992 5 513.4 6.1 4 1992 6 520.0 7.6 4 1992 7 523.8 6.2 8 1992 8 523.8 6.4 6 1992 9 523.5 9.1 10 1992 10 525.2 8.0 8 1992 11 529.5 9.1 7 1992 12 526.9 6.0 8 1993 1 515.5 5.5 3 1993 2 522.9 9.8 4 1993 3 518.5 5.3 7 1993 4 526.7 14.3 4 1993 5 518.7 5.4 5 1993 6 525.0 9.4 10 1993 7 535.3 10.6 6 1993 8 525.8 11.8 8 1993 9 519.5 5.4 7 1993 10 523.2 8.5 3 1993 11 519.9 6.0 7 1993 12 520.0 5.0 8 1994 1 518.8 10.5 5 1994 2 519.4 5.7 8 1994 3 519.3 6.3 9 1994 4 520.0 6.4 5 1994 5 514.3 6.2 9 1994 6 516.9 7.1 8 1994 7 517.3 6.7 6 1994 8 520.3 6.0 10 1994 9 515.6 6.0 7 1994 10 521.3 7.2 8 1994 11 521.6 6.1 9 1994 12 517.4 6.6 8 1995 1 519.6 6.5 10 1995 2 519.3 6.4 5 1995 3 519.4 6.9 8 1995 4 523.2 6.5 8 1995 5 526.6 5.4 10 1995 6 521.7 5.3 8 1995 7 526.2 6.0 8 1995 8 522.5 4.9 10 1995 9 521.3 6.9 8 1995 10 520.5 5.1 10 1995 11 520.3 6.6 8 1995 12 520.5 6.1 8