# file: SMO_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: SMO (Tutuila, Samoa -- 14.25 S, 170.56 W, 42 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 # F12oldGCSMOyr F12oldGCSMOmon F12oldGCSMOm F12oldGCSMOsd F12oldGCSMOn 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 8 241.4 5.5 5 1977 9 240.7 5.6 6 1977 10 243.1 4.5 3 1977 11 243.4 6.7 8 1977 12 250.0 7.1 7 1978 1 252.8 8.4 4 1978 2 255.2 4.0 2 1978 3 nan nan 0 1978 4 nan nan 0 1978 5 261.4 6.9 4 1978 6 259.2 6.2 5 1978 7 256.8 4.9 7 1978 8 258.1 7.4 8 1978 9 261.5 7.3 8 1978 10 262.3 3.6 4 1978 11 266.1 6.4 6 1978 12 266.0 7.3 8 1979 1 273.0 4.3 5 1979 2 272.5 5.2 8 1979 3 272.2 4.4 4 1979 4 273.1 6.3 8 1979 5 271.5 4.7 10 1979 6 272.3 6.3 8 1979 7 275.2 7.7 8 1979 8 278.6 8.1 7 1979 9 279.5 6.8 7 1979 10 279.7 6.9 10 1979 11 291.1 9.5 6 1979 12 279.9 5.5 8 1980 1 284.3 5.4 8 1980 2 284.0 5.6 8 1980 3 287.7 14.2 9 1980 4 295.6 23.1 6 1980 5 294.0 15.3 5 1980 6 288.4 5.0 8 1980 7 289.2 4.5 8 1980 8 288.2 4.2 9 1980 9 292.6 3.8 3 1980 10 291.9 7.2 7 1980 11 291.7 5.9 4 1980 12 295.8 6.7 4 1981 1 299.2 7.4 8 1981 2 302.5 4.2 4 1981 3 303.6 6.3 8 1981 4 305.8 5.6 8 1981 5 308.9 8.4 8 1981 6 313.4 13.1 4 1981 7 312.3 6.7 4 1981 8 312.8 4.8 8 1981 9 311.4 3.3 2 1981 10 315.3 7.9 6 1981 11 317.4 6.1 6 1981 12 318.7 7.1 4 1982 1 323.6 6.4 8 1982 2 327.4 4.8 6 1982 3 323.5 5.2 8 1982 4 326.5 4.4 6 1982 5 324.9 9.4 9 1982 6 324.9 5.9 4 1982 7 327.7 4.6 6 1982 8 329.4 5.0 8 1982 9 329.9 5.5 6 1982 10 332.8 5.2 8 1982 11 332.1 5.1 6 1982 12 332.4 4.5 6 1983 1 337.5 6.2 6 1983 2 338.3 4.8 6 1983 3 342.0 7.1 6 1983 4 341.3 5.9 4 1983 5 340.7 6.0 2 1983 6 340.9 3.5 2 1983 7 nan nan 0 1983 8 343.8 13.7 8 1983 9 351.7 7.4 8 1983 10 353.7 5.1 8 1983 11 355.4 6.9 8 1983 12 356.7 6.1 8 1984 1 356.2 9.2 6 1984 2 363.3 6.1 10 1984 3 358.0 6.6 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 2 372.1 4.3 2 1985 3 369.0 6.2 10 1985 4 369.7 5.2 8 1985 5 375.2 6.9 6 1985 6 374.5 9.3 4 1985 7 378.3 14.0 7 1985 8 372.4 4.3 6 1985 9 393.8 24.0 8 1985 10 384.4 4.3 9 1985 11 379.3 11.1 6 1985 12 387.4 5.3 8 1986 1 389.5 8.1 9 1986 2 393.5 7.5 3 1986 3 391.7 4.2 3 1986 4 392.4 7.0 6 1986 5 393.1 5.6 9 1986 6 398.8 7.3 5 1986 7 396.0 5.3 4 1986 8 398.4 7.0 8 1986 9 399.9 5.4 6 1986 10 399.9 7.0 7 1986 11 399.3 6.5 6 1986 12 403.0 5.3 6 1987 1 405.3 10.1 4 1987 2 408.0 3.4 2 1987 3 414.4 3.1 2 1987 4 417.0 28.8 2 1987 5 nan nan 0 1987 6 nan nan 0 1987 7 nan nan 0 1987 8 nan nan 0 1987 9 nan nan 0 1987 10 nan nan 0 1987 11 415.9 13.5 6 1987 12 429.5 7.6 8 1988 1 431.7 5.3 8 1988 2 435.1 7.0 6 1988 3 431.5 6.5 8 1988 4 440.4 6.7 6 1988 5 437.5 8.3 8 1988 6 435.5 4.4 4 1988 7 443.3 6.3 6 1988 8 443.2 6.4 6 1988 9 443.3 6.9 9 1988 10 449.7 7.1 8 1988 11 454.3 7.8 4 1988 12 450.5 4.7 6 1989 1 453.9 8.6 6 1989 2 457.0 7.0 6 1989 3 451.3 6.0 6 1989 4 454.3 3.7 4 1989 5 457.0 4.0 4 1989 6 448.6 6.0 2 1989 7 460.0 6.1 6 1989 8 459.3 3.6 2 1989 9 462.1 5.6 6 1989 10 465.4 10.0 6 1989 11 464.3 3.4 2 1989 12 468.2 6.7 4 1990 1 nan nan 0 1990 2 466.7 4.3 2 1990 3 470.0 4.9 6 1990 4 469.0 4.7 6 1990 5 467.8 5.7 5 1990 6 471.5 4.4 7 1990 7 463.2 12.7 3 1990 8 472.1 5.9 4 1990 9 nan nan 0 1990 10 476.2 6.4 7 1990 11 478.4 4.9 4 1990 12 481.7 5.2 5 1991 1 487.4 5.7 3 1991 2 nan nan 0 1991 3 486.2 6.7 4 1991 4 487.6 5.4 6 1991 5 491.6 7.5 2 1991 6 485.7 5.3 8 1991 7 488.2 4.2 6 1991 8 492.4 7.9 7 1991 9 482.0 34.6 9 1991 10 493.4 4.5 4 1991 11 494.1 4.7 7 1991 12 492.9 9.3 6 1992 1 497.2 5.8 6 1992 2 498.0 8.3 4 1992 3 498.3 12.2 6 1992 4 499.6 9.6 6 1992 5 508.1 5.4 2 1992 6 507.6 5.0 5 1992 7 501.8 6.1 5 1992 8 505.4 6.2 8 1992 9 499.0 15.8 3 1992 10 508.9 6.1 8 1992 11 504.9 6.1 2 1992 12 nan nan 0 1993 1 514.4 5.5 8 1993 2 506.7 7.3 3 1993 3 nan nan 0 1993 4 501.1 7.0 3 1993 5 504.4 4.9 2 1993 6 511.6 13.5 6 1993 7 523.2 3.6 2 1993 8 505.8 5.6 6 1993 9 507.7 6.6 5 1993 10 505.3 6.7 2 1993 11 506.0 7.4 7 1993 12 507.4 5.2 5 1994 1 510.1 5.2 5 1994 2 512.2 5.4 5 1994 3 510.1 9.8 4 1994 4 516.6 14.0 6 1994 5 510.0 4.7 8 1994 6 505.9 7.7 5 1994 7 507.0 4.2 6 1994 8 506.7 4.1 5 1994 9 508.0 4.9 6 1994 10 509.8 4.9 8 1994 11 510.9 6.8 7 1994 12 515.5 8.5 4 1995 1 511.5 4.6 5 1995 2 514.5 4.2 4 1995 3 nan nan 0 1995 4 513.7 5.7 6 1995 5 513.9 7.0 4 1995 6 517.9 4.8 3 1995 7 514.9 4.9 6 1995 8 510.1 6.4 8 1995 9 508.5 5.4 8 1995 10 508.4 5.3 8 1995 11 508.8 6.0 6 1995 12 510.1 4.0 3