# file: MLO_N2O_MM.dat # # Atmospheric measurements of N2O (Nitrous Oxide) # 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: Nitrous Oxide data from # the NOAA/ESRL halocarbons original flask program. # # Calibration scale used: NOAA 2006A # # 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-billion, ppb. # # 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 # N2OoldGCMLOyr N2OoldGCMLOmon N2OoldGCMLOm N2OoldGCMLOsd N2OoldGCMLOn 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 9 301.9 2.1 3 1977 10 300.9 3.5 3 1977 11 299.0 1.8 3 1977 12 302.4 1.5 3 1978 1 301.7 2.4 5 1978 2 300.2 1.1 4 1978 3 302.5 1.3 7 1978 4 299.5 1.3 7 1978 5 298.4 2.0 8 1978 6 299.5 1.2 8 1978 7 299.3 2.1 6 1978 8 299.7 2.0 8 1978 9 300.9 0.7 8 1978 10 300.5 0.4 7 1978 11 300.6 1.4 7 1978 12 300.3 1.1 8 1979 1 300.8 1.0 6 1979 2 300.9 0.9 6 1979 3 301.2 1.5 10 1979 4 301.0 1.7 7 1979 5 300.9 1.0 10 1979 6 300.7 0.8 4 1979 7 301.1 1.4 10 1979 8 300.7 2.0 2 1979 9 301.2 1.1 6 1979 10 302.9 1.3 4 1979 11 301.8 1.8 6 1979 12 302.5 1.6 8 1980 1 302.3 0.8 6 1980 2 301.1 1.8 8 1980 3 302.5 1.2 8 1980 4 300.6 2.6 5 1980 5 301.7 2.0 6 1980 6 301.2 1.7 7 1980 7 300.4 1.7 4 1980 8 301.6 3.2 5 1980 9 300.9 2.6 6 1980 10 303.4 1.9 8 1980 11 301.1 1.7 6 1980 12 300.4 2.2 8 1981 1 300.8 2.1 6 1981 2 300.8 2.2 5 1981 3 302.8 2.0 5 1981 4 302.9 2.0 9 1981 5 302.4 0.3 5 1981 6 303.2 1.6 8 1981 7 302.2 1.5 8 1981 8 302.4 2.2 7 1981 9 302.2 2.4 8 1981 10 303.3 2.2 10 1981 11 302.5 1.6 6 1981 12 302.2 2.1 6 1982 1 302.8 1.2 8 1982 2 303.0 2.3 8 1982 3 302.6 1.2 8 1982 4 303.7 1.2 10 1982 5 303.3 1.3 8 1982 6 303.1 1.9 10 1982 7 303.4 1.7 7 1982 8 304.9 0.8 10 1982 9 303.6 0.5 6 1982 10 304.2 1.8 8 1982 11 303.8 1.5 10 1982 12 303.6 1.0 7 1983 1 303.6 0.9 10 1983 2 304.2 1.7 8 1983 3 304.1 1.4 8 1983 4 303.6 1.7 8 1983 5 303.7 1.1 4 1983 6 303.1 0.6 8 1983 7 302.8 1.2 6 1983 8 303.5 2.0 8 1983 9 304.0 0.8 8 1983 10 303.8 1.1 10 1983 11 303.4 1.4 8 1983 12 303.7 0.6 8 1984 1 304.0 1.1 10 1984 2 303.6 0.7 8 1984 3 303.4 1.0 6 1984 4 304.8 1.1 12 1984 5 304.3 1.0 8 1984 6 303.9 0.9 8 1984 7 305.6 1.3 8 1984 8 304.8 2.0 8 1984 9 304.6 1.2 8 1984 10 305.4 1.2 10 1984 11 306.0 1.7 8 1984 12 305.5 0.6 8 1985 1 306.8 0.6 8 1985 2 306.1 1.2 8 1985 3 303.5 2.7 7 1985 4 303.9 1.0 8 1985 5 304.5 2.5 8 1985 6 305.8 1.6 5 1985 7 303.3 0.8 6 1985 8 303.3 1.7 7 1985 9 305.7 1.9 8 1985 10 306.6 1.1 8 1985 11 306.9 1.8 8 1985 12 306.8 1.1 10 1986 1 306.6 0.9 8 1986 2 306.0 0.8 7 1986 3 307.2 1.3 9 1986 4 306.0 1.6 4 1986 5 306.1 1.0 6 1986 6 306.5 2.3 8 1986 7 307.6 2.0 6 1986 8 307.3 1.1 9 1986 9 307.3 1.0 5 1986 10 308.5 1.9 8 1986 11 307.7 2.0 8 1986 12 307.1 1.5 10 1987 1 307.1 1.3 6 1987 2 306.4 1.1 2 1987 3 307.2 1.2 8 1987 4 304.8 1.0 3 1987 5 306.2 1.5 2 1987 6 305.9 1.5 6 1987 7 304.6 2.7 6 1987 8 306.0 1.3 8 1987 9 304.4 1.1 2 1987 10 305.6 1.7 5 1987 11 306.5 1.4 8 1987 12 306.6 1.4 7 1988 1 305.9 0.7 4 1988 2 306.9 1.1 9 1988 3 305.1 0.7 2 1988 4 306.7 1.1 7 1988 5 305.6 1.1 6 1988 6 305.4 2.2 6 1988 7 306.8 0.9 6 1988 8 305.5 0.8 8 1988 9 305.2 1.1 8 1988 10 306.5 1.0 10 1988 11 308.0 1.1 2 1988 12 305.9 1.5 6 1989 1 306.9 0.7 10 1989 2 307.2 0.8 6 1989 3 306.9 1.2 8 1989 4 308.0 0.6 8 1989 5 307.4 1.1 7 1989 6 307.6 0.7 6 1989 7 307.0 1.9 7 1989 8 307.5 1.0 8 1989 9 308.1 0.8 8 1989 10 307.7 0.9 10 1989 11 308.3 0.9 8 1989 12 309.0 1.0 7 1990 1 310.6 0.5 4 1990 2 309.3 1.3 8 1990 3 309.9 1.7 6 1990 4 308.1 0.6 9 1990 5 308.0 1.8 7 1990 6 307.6 1.5 7 1990 7 306.5 3.3 6 1990 8 310.4 2.6 4 1990 9 309.0 1.5 6 1990 10 309.7 0.9 4 1990 11 308.3 0.9 8 1990 12 310.0 0.9 10 1991 1 310.9 1.3 8 1991 2 309.7 0.4 4 1991 3 309.8 1.1 8 1991 4 310.0 1.8 8 1991 5 309.3 1.2 4 1991 6 309.2 0.7 3 1991 7 310.0 2.1 8 1991 8 309.0 0.6 8 1991 9 310.1 1.5 8 1991 10 309.8 0.9 8 1991 11 nan nan 0 1991 12 nan nan 0 1992 1 nan nan 0 1992 2 nan nan 0 1992 3 nan nan 0 1992 4 nan nan 0 1992 5 nan nan 0 1992 6 nan nan 0 1992 7 nan nan 0 1992 8 nan nan 0 1992 9 nan nan 0 1992 10 nan nan 0 1992 11 nan nan 0 1992 12 nan nan 0 1993 1 nan nan 0 1993 2 nan nan 0 1993 3 nan nan 0 1993 4 nan nan 0 1993 5 nan nan 0 1993 6 nan nan 0 1993 7 nan nan 0 1993 8 nan nan 0 1993 9 nan nan 0 1993 10 nan nan 0 1993 11 nan nan 0 1993 12 nan nan 0 1994 1 nan nan 0 1994 2 nan nan 0 1994 3 nan nan 0 1994 4 nan nan 0 1994 5 nan nan 0 1994 6 nan nan 0 1994 7 nan nan 0 1994 8 nan nan 0 1994 9 nan nan 0 1994 10 nan nan 0 1994 11 nan nan 0 1994 12 313.4 4.3 4 1995 1 310.0 2.2 9 1995 2 310.4 2.4 6 1995 3 312.6 0.5 8 1995 4 311.9 2.2 7 1995 5 312.6 2.0 8 1995 6 312.6 0.9 9 1995 7 312.0 1.2 10 1995 8 310.8 1.9 8 1995 9 311.9 1.3 7 1995 10 313.2 1.3 6 1995 11 312.3 1.4 8 1995 12 312.7 0.8 6