# file: MLO_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: MLO (Mauna Loa, Hawaii -- 19.54 N, 155.58 W, 3397 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 # F12oldGCMLOyr F12oldGCMLOmon F12oldGCMLOm F12oldGCMLOsd F12oldGCMLOn 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 nan nan 0 1977 8 nan nan 0 1977 9 259.6 9.6 2 1977 10 265.8 3.3 2 1977 11 265.9 9.1 6 1977 12 275.6 8.2 6 1978 1 275.8 12.9 3 1978 2 271.1 5.1 6 1978 3 278.5 15.0 6 1978 4 282.6 9.3 3 1978 5 nan nan 0 1978 6 285.2 8.5 6 1978 7 284.8 13.0 6 1978 8 283.4 6.1 8 1978 9 281.4 5.5 3 1978 10 281.5 6.9 7 1978 11 285.7 6.1 5 1978 12 295.6 10.9 4 1979 1 295.1 7.1 4 1979 2 287.1 6.6 4 1979 3 289.8 6.7 6 1979 4 287.3 6.7 8 1979 5 293.7 7.2 6 1979 6 298.7 15.7 4 1979 7 297.8 8.0 10 1979 8 nan nan 0 1979 9 302.9 9.2 4 1979 10 324.5 9.0 4 1979 11 nan nan 0 1979 12 304.2 4.7 2 1980 1 310.0 11.2 6 1980 2 323.4 7.8 4 1980 3 315.9 26.2 8 1980 4 309.5 7.5 6 1980 5 298.0 7.0 6 1980 6 313.8 16.5 6 1980 7 326.1 21.5 7 1980 8 320.7 26.1 7 1980 9 306.3 5.8 10 1980 10 317.2 9.9 6 1980 11 315.5 7.7 4 1980 12 311.7 10.5 10 1981 1 310.2 3.8 4 1981 2 316.8 4.9 6 1981 3 316.4 5.4 4 1981 4 326.6 5.7 4 1981 5 331.3 7.9 2 1981 6 337.7 10.9 6 1981 7 335.7 10.4 4 1981 8 341.8 18.7 6 1981 9 337.2 6.9 4 1981 10 340.1 10.7 6 1981 11 335.2 8.0 4 1981 12 nan nan 0 1982 1 339.6 7.2 6 1982 2 344.2 13.5 4 1982 3 335.9 8.0 8 1982 4 337.6 6.8 10 1982 5 338.6 5.7 8 1982 6 339.2 7.6 10 1982 7 337.4 7.9 7 1982 8 340.6 5.9 10 1982 9 345.5 6.8 6 1982 10 346.3 7.0 8 1982 11 347.5 10.1 10 1982 12 351.0 7.3 8 1983 1 345.6 4.5 10 1983 2 352.6 7.4 8 1983 3 351.6 7.9 8 1983 4 352.1 5.6 8 1983 5 351.5 9.1 4 1983 6 354.5 4.9 8 1983 7 360.8 9.4 4 1983 8 354.0 8.7 6 1983 9 365.7 10.6 8 1983 10 365.5 10.2 10 1983 11 370.8 7.1 8 1983 12 364.9 13.2 6 1984 1 366.2 6.1 8 1984 2 374.4 6.2 8 1984 3 360.4 7.4 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 2 378.9 4.3 2 1985 3 380.8 5.0 8 1985 4 375.9 4.0 6 1985 5 384.2 10.2 6 1985 6 391.8 9.6 8 1985 7 381.9 6.1 7 1985 8 383.1 5.9 8 1985 9 396.1 9.7 10 1985 10 401.0 9.9 6 1985 11 395.2 6.9 4 1985 12 401.9 5.0 8 1986 1 399.9 7.4 8 1986 2 402.1 15.8 6 1986 3 403.0 7.8 10 1986 4 405.3 7.1 6 1986 5 404.4 5.7 8 1986 6 407.3 7.7 7 1986 7 403.8 6.8 8 1986 8 408.6 7.5 10 1986 9 409.8 6.3 7 1986 10 418.7 6.3 8 1986 11 417.5 6.1 8 1986 12 418.7 6.7 8 1987 1 420.6 6.8 4 1987 2 411.0 4.3 2 1987 3 430.7 6.2 6 1987 4 420.4 9.1 3 1987 5 nan nan 0 1987 6 417.3 9.6 6 1987 7 416.9 8.9 6 1987 8 421.1 9.8 6 1987 9 429.8 7.3 4 1987 10 434.7 12.9 5 1987 11 430.7 6.4 8 1987 12 445.8 8.0 7 1988 1 445.5 8.2 4 1988 2 450.3 7.1 9 1988 3 447.5 3.1 2 1988 4 455.8 10.1 7 1988 5 454.5 5.7 6 1988 6 455.5 7.0 2 1988 7 459.6 7.3 6 1988 8 458.5 5.9 8 1988 9 462.1 6.3 8 1988 10 463.4 6.5 10 1988 11 nan nan 0 1988 12 470.8 9.4 6 1989 1 477.9 18.8 10 1989 2 463.3 5.0 5 1989 3 467.5 6.0 8 1989 4 470.7 7.4 6 1989 5 470.1 6.4 7 1989 6 478.6 15.4 6 1989 7 471.0 6.9 7 1989 8 474.8 5.6 8 1989 9 477.7 6.2 6 1989 10 480.6 7.0 10 1989 11 486.5 12.6 8 1989 12 nan nan 0 1990 1 497.3 22.3 6 1990 2 483.8 8.7 8 1990 3 484.2 12.1 6 1990 4 493.5 11.2 7 1990 5 487.9 8.2 7 1990 6 487.4 8.0 7 1990 7 483.7 9.3 8 1990 8 488.1 7.9 4 1990 9 490.8 8.9 6 1990 10 491.2 4.1 4 1990 11 490.8 4.8 8 1990 12 493.8 5.7 10 1991 1 494.5 6.5 8 1991 2 489.4 4.6 4 1991 3 494.5 5.5 8 1991 4 499.6 5.2 6 1991 5 498.4 5.6 4 1991 6 500.1 4.8 3 1991 7 499.8 4.3 6 1991 8 500.3 6.1 8 1991 9 501.7 6.1 8 1991 10 504.4 5.3 8 1991 11 506.9 5.4 6 1991 12 506.8 4.9 10 1992 1 510.2 6.6 8 1992 2 505.1 5.2 4 1992 3 508.4 3.9 2 1992 4 515.0 8.4 4 1992 5 518.0 5.8 6 1992 6 518.7 5.1 6 1992 7 514.9 5.4 8 1992 8 516.7 5.1 10 1992 9 520.5 8.3 5 1992 10 522.7 12.1 4 1992 11 521.2 12.5 8 1992 12 524.6 9.3 8 1993 1 527.6 9.3 4 1993 2 521.2 6.9 4 1993 3 518.1 8.3 4 1993 4 516.8 7.7 8 1993 5 517.5 6.7 4 1993 6 520.2 6.6 5 1993 7 532.0 17.4 5 1993 8 522.5 13.0 8 1993 9 516.4 4.5 6 1993 10 519.4 5.1 6 1993 11 521.3 9.1 8 1993 12 519.0 7.2 7 1994 1 517.8 5.4 10 1994 2 518.0 6.9 8 1994 3 519.8 6.4 7 1994 4 518.7 5.7 8 1994 5 514.2 6.5 6 1994 6 511.2 4.9 6 1994 7 513.5 6.6 8 1994 8 517.1 5.5 7 1994 9 517.1 6.0 8 1994 10 519.6 6.3 10 1994 11 520.1 5.0 7 1994 12 522.4 5.6 6 1995 1 517.7 5.1 9 1995 2 520.3 5.5 7 1995 3 519.9 6.2 8 1995 4 520.9 4.9 8 1995 5 523.8 8.4 7 1995 6 521.5 4.1 9 1995 7 521.6 4.7 10 1995 8 519.4 5.3 8 1995 9 513.9 5.8 8 1995 10 512.4 9.3 6 1995 11 517.1 5.8 8 1995 12 518.2 5.8 8