# file: MLO_F11_MM.dat # # Atmospheric measurements of F11 (Chloroflurocarbon-11) # 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-11 data from # the NOAA/ESRL halocarbons original flask program. # # Calibration scale used: NOAA 2016 # # 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 # F11oldGCMLOyr F11oldGCMLOmon F11oldGCMLOm F11oldGCMLOsd F11oldGCMLOn 1977 1 142.6 3.4 4 1977 2 145.0 8.3 4 1977 3 140.5 5.2 3 1977 4 138.7 9.1 4 1977 5 139.7 9.8 5 1977 6 141.9 7.7 4 1977 7 140.5 4.1 4 1977 8 144.1 2.6 2 1977 9 146.1 1.3 2 1977 10 144.6 4.0 6 1977 11 146.2 3.2 8 1977 12 147.1 2.2 7 1978 1 150.0 4.7 4 1978 2 148.2 5.3 5 1978 3 147.6 5.5 5 1978 4 150.5 3.9 6 1978 5 151.3 2.0 6 1978 6 150.9 2.5 6 1978 7 152.7 4.7 6 1978 8 154.5 4.6 8 1978 9 156.4 2.3 8 1978 10 154.6 3.1 7 1978 11 156.2 1.7 7 1978 12 156.1 2.0 6 1979 1 158.7 4.4 6 1979 2 159.7 3.1 8 1979 3 160.1 2.4 10 1979 4 159.3 2.7 7 1979 5 158.4 1.8 10 1979 6 158.9 1.2 4 1979 7 161.1 1.8 10 1979 8 nan nan 0 1979 9 164.6 2.9 8 1979 10 169.6 2.3 6 1979 11 167.7 2.3 5 1979 12 166.5 2.5 8 1980 1 168.3 2.2 6 1980 2 167.8 2.7 8 1980 3 170.1 2.9 8 1980 4 171.8 1.9 4 1980 5 167.0 1.0 6 1980 6 170.9 1.5 6 1980 7 173.6 3.6 7 1980 8 173.0 3.0 7 1980 9 171.1 3.1 7 1980 10 177.3 4.2 5 1980 11 176.7 3.9 4 1980 12 172.6 4.3 7 1981 1 173.2 0.9 4 1981 2 176.3 0.6 5 1981 3 177.2 2.1 6 1981 4 177.6 2.4 9 1981 5 177.8 2.0 4 1981 6 179.5 2.9 8 1981 7 181.0 1.4 8 1981 8 180.1 2.2 4 1981 9 183.1 4.1 4 1981 10 183.0 2.2 8 1981 11 182.4 2.1 6 1981 12 nan nan 0 1982 1 182.3 3.1 8 1982 2 184.0 4.0 8 1982 3 183.4 1.4 4 1982 4 184.3 2.3 10 1982 5 185.9 1.0 8 1982 6 185.6 3.5 10 1982 7 184.9 2.9 5 1982 8 187.0 2.3 10 1982 9 189.0 1.4 6 1982 10 189.5 2.4 8 1982 11 189.2 2.8 10 1982 12 189.0 2.2 6 1983 1 190.6 1.5 10 1983 2 191.7 2.8 8 1983 3 193.4 3.2 8 1983 4 193.5 1.4 6 1983 5 194.7 1.3 4 1983 6 200.3 5.5 8 1983 7 197.8 2.0 6 1983 8 197.9 2.3 8 1983 9 199.4 3.0 6 1983 10 199.2 2.4 10 1983 11 199.1 4.2 8 1983 12 197.1 5.9 6 1984 1 201.1 3.5 6 1984 2 202.1 3.5 6 1984 3 201.0 1.3 6 1984 4 201.9 4.3 12 1984 5 202.1 2.4 6 1984 6 203.0 2.4 8 1984 7 203.4 1.7 6 1984 8 204.5 2.1 8 1984 9 206.4 2.2 8 1984 10 209.5 3.1 10 1984 11 212.3 1.7 8 1984 12 210.9 4.5 8 1985 1 212.5 3.8 8 1985 2 212.1 2.4 6 1985 3 215.5 3.8 8 1985 4 213.8 1.3 8 1985 5 216.5 4.6 7 1985 6 215.5 4.4 8 1985 7 214.8 3.5 9 1985 8 214.7 3.4 6 1985 9 217.3 2.3 8 1985 10 220.9 2.6 8 1985 11 219.2 3.1 6 1985 12 224.6 3.6 10 1986 1 218.6 2.2 6 1986 2 220.6 4.8 6 1986 3 nan nan 0 1986 4 227.1 2.1 4 1986 5 225.5 2.2 6 1986 6 227.3 6.7 8 1986 7 226.5 2.0 4 1986 8 225.4 3.3 7 1986 9 231.0 0.1 2 1986 10 231.9 1.2 6 1986 11 232.0 4.1 6 1986 12 232.3 1.9 6 1987 1 232.2 1.8 4 1987 2 nan nan 0 1987 3 234.5 2.6 9 1987 4 236.5 3.5 3 1987 5 nan nan 0 1987 6 236.3 3.6 6 1987 7 234.8 5.0 8 1987 8 237.1 2.5 6 1987 9 239.8 1.6 2 1987 10 242.0 2.6 3 1987 11 242.0 1.7 8 1987 12 239.6 3.1 5 1988 1 239.4 0.9 2 1988 2 244.2 3.3 9 1988 3 240.5 0.8 2 1988 4 246.9 4.4 7 1988 5 245.6 1.6 4 1988 6 246.7 3.2 4 1988 7 246.6 1.7 6 1988 8 247.6 2.3 8 1988 9 249.8 2.9 8 1988 10 250.3 2.8 8 1988 11 256.8 3.2 2 1988 12 nan nan 0 1989 1 257.4 5.6 7 1989 2 251.8 2.6 6 1989 3 253.3 2.2 7 1989 4 256.0 2.2 6 1989 5 255.5 2.2 7 1989 6 256.7 2.7 4 1989 7 255.8 3.4 9 1989 8 257.8 2.7 6 1989 9 259.6 2.6 6 1989 10 259.4 2.7 10 1989 11 265.7 10.4 8 1989 12 263.1 4.5 7 1990 1 263.3 4.5 8 1990 2 260.6 2.9 8 1990 3 261.2 1.9 6 1990 4 260.0 1.3 9 1990 5 260.9 1.6 7 1990 6 264.2 2.3 7 1990 7 261.4 3.2 8 1990 8 260.3 3.6 4 1990 9 260.6 2.4 6 1990 10 264.6 0.9 2 1990 11 263.0 1.4 8 1990 12 266.6 2.6 9 1991 1 266.3 1.5 5 1991 2 262.8 0.6 4 1991 3 265.5 1.1 8 1991 4 267.2 2.1 6 1991 5 263.3 6.0 4 1991 6 263.4 3.5 4 1991 7 267.3 3.0 6 1991 8 266.2 1.4 8 1991 9 265.9 1.9 6 1991 10 265.3 2.1 4 1991 11 268.5 3.3 8 1991 12 270.3 0.6 8 1992 1 269.1 1.5 8 1992 2 268.7 1.8 4 1992 3 266.6 2.3 4 1992 4 270.3 1.4 4 1992 5 271.6 3.4 6 1992 6 269.1 1.7 6 1992 7 269.3 1.1 6 1992 8 269.6 1.2 10 1992 9 270.6 2.5 5 1992 10 271.5 2.4 4 1992 11 271.9 2.8 9 1992 12 272.3 1.5 6 1993 1 272.7 0.4 3 1993 2 271.3 0.9 4 1993 3 276.2 7.4 6 1993 4 268.7 2.3 6 1993 5 270.2 1.6 4 1993 6 271.5 2.7 7 1993 7 270.6 0.9 3 1993 8 269.6 1.6 10 1993 9 271.1 1.2 6 1993 10 270.8 2.3 6 1993 11 272.4 4.1 8 1993 12 272.4 2.5 5 1994 1 272.0 2.9 7 1994 2 270.8 2.7 8 1994 3 271.6 1.1 8 1994 4 271.6 1.1 8 1994 5 269.8 2.7 6 1994 6 269.4 3.2 8 1994 7 270.2 3.3 8 1994 8 271.9 1.8 6 1994 9 272.3 2.7 8 1994 10 269.7 2.6 8 1994 11 272.9 2.8 6 1994 12 275.1 5.2 6 1995 1 269.9 2.0 7 1995 2 269.5 1.4 7 1995 3 270.4 1.9 8 1995 4 271.8 3.9 8 1995 5 270.0 1.6 5 1995 6 270.7 0.7 9 1995 7 270.5 1.3 8 1995 8 268.9 1.2 8 1995 9 269.4 0.6 7 1995 10 270.3 2.5 6 1995 11 268.8 1.3 8 1995 12 269.8 3.9 4