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6. Process or Product Monitoring and Control
6.4. Introduction to Time Series Analysis
6.4.4. Univariate Time Series Models
6.4.4.1. Sample Data Sets

6.4.4.1.1.

Data Set of Monthly CO2 Concentrations

Source and Background This data set contains selected monthly mean CO2 concentrations at the Mauna Loa Observatory from 1974 to 1987. The CO2 concentrations were measured by the continuous infrared analyser of the Geophysical Monitoring for Climatic Change division of NOAA's Air Resources Laboratory. The selection has been for an approximation of 'background conditions'. See Thoning et al., "Atmospheric Carbon Dioxide at Mauna Loa Observatory: II Analysis of the NOAA/GMCC Data 1974-1985", Journal of Geophysical Research (submitted) for details.

This dataset was received from Jim Elkins of NOAA in 1988.

Data Each line contains the CO2 concentration (mixing ratio in dry air, expressed in the WMO X85 mole fraction scale, maintained by the Scripps Institution of Oceanography). In addition, it contains the year, month, and a numeric value for the combined month and year. This combined date is useful for plotting purposes.
    CO2        Year&Month      Year        Month
--------------------------------------------------
  333.13        1974.38        1974          5
  332.09        1974.46        1974          6
  331.10        1974.54        1974          7
  329.14        1974.63        1974          8
  327.36        1974.71        1974          9
  327.29        1974.79        1974         10
  328.23        1974.88        1974         11
  329.55        1974.96        1974         12
 
  330.62        1975.04        1975          1
  331.40        1975.13        1975          2
  331.87        1975.21        1975          3
  333.18        1975.29        1975          4
  333.92        1975.38        1975          5
  333.43        1975.46        1975          6
  331.85        1975.54        1975          7
  330.01        1975.63        1975          8
  328.51        1975.71        1975          9
  328.41        1975.79        1975         10
  329.25        1975.88        1975         11
  330.97        1975.96        1975         12
 
  331.60        1976.04        1976          1
  332.60        1976.13        1976          2
  333.57        1976.21        1976          3
  334.72        1976.29        1976          4
  334.68        1976.38        1976          5
  334.17        1976.46        1976          6
  332.96        1976.54        1976          7
  330.80        1976.63        1976          8
  328.98        1976.71        1976          9
  328.57        1976.79        1976         10
  330.20        1976.88        1976         11
  331.58        1976.96        1976         12
 
  332.67        1977.04        1977          1
  333.17        1977.13        1977          2
  334.86        1977.21        1977          3
  336.07        1977.29        1977          4
  336.82        1977.38        1977          5
  336.12        1977.46        1977          6
  334.81        1977.54        1977          7
  332.56        1977.63        1977          8
  331.30        1977.71        1977          9
  331.22        1977.79        1977         10
  332.37        1977.88        1977         11
  333.49        1977.96        1977         12
 
  334.71        1978.04        1978          1
  335.23        1978.13        1978          2
  336.54        1978.21        1978          3
  337.79        1978.29        1978          4
  337.95        1978.38        1978          5
  338.00        1978.46        1978          6
  336.37        1978.54        1978          7
  334.47        1978.63        1978          8
  332.46        1978.71        1978          9
  332.29        1978.79        1978         10
  333.76        1978.88        1978         11
  334.80        1978.96        1978         12
 
  336.00        1979.04        1979          1
  336.63        1979.13        1979          2
  337.93        1979.21        1979          3
  338.95        1979.29        1979          4
  339.05        1979.38        1979          5
  339.27        1979.46        1979          6
  337.64        1979.54        1979          7
  335.68        1979.63        1979          8
  333.77        1979.71        1979          9
  334.09        1979.79        1979         10
  335.29        1979.88        1979         11
  336.76        1979.96        1979         12
 
  337.77        1980.04        1980          1
  338.26        1980.13        1980          2
  340.10        1980.21        1980          3
  340.88        1980.29        1980          4
  341.47        1980.38        1980          5
  341.31        1980.46        1980          6
  339.41        1980.54        1980          7
  337.74        1980.63        1980          8
  336.07        1980.71        1980          9
  336.07        1980.79        1980         10
  337.22        1980.88        1980         11
  338.38        1980.96        1980         12
 
  339.32        1981.04        1981          1
  340.41        1981.13        1981          2
  341.69        1981.21        1981          3
  342.51        1981.29        1981          4
  343.02        1981.38        1981          5
  342.54        1981.46        1981          6
  340.88        1981.54        1981          7
  338.75        1981.63        1981          8
  337.05        1981.71        1981          9
  337.13        1981.79        1981         10
  338.45        1981.88        1981         11
  339.85        1981.96        1981         12
 
  340.90        1982.04        1982          1
  341.70        1982.13        1982          2
  342.70        1982.21        1982          3
  343.65        1982.29        1982          4
  344.28        1982.38        1982          5
  343.42        1982.46        1982          6
  342.02        1982.54        1982          7
  339.97        1982.63        1982          8
  337.84        1982.71        1982          9
  338.00        1982.79        1982         10
  339.20        1982.88        1982         11
  340.63        1982.96        1982         12
 
  341.41        1983.04        1983          1
  342.68        1983.13        1983          2
  343.04        1983.21        1983          3
  345.27        1983.29        1983          4
  345.92        1983.38        1983          5
  345.40        1983.46        1983          6
  344.16        1983.54        1983          7
  342.11        1983.63        1983          8
  340.11        1983.71        1983          9
  340.15        1983.79        1983         10
  341.38        1983.88        1983         11
  343.02        1983.96        1983         12
 
  343.87        1984.04        1984          1
  344.59        1984.13        1984          2
  345.11        1984.21        1984          3
  347.07        1984.29        1984          4
  347.38        1984.38        1984          5
  346.78        1984.46        1984          6
  344.96        1984.54        1984          7
  342.71        1984.63        1984          8
  340.86        1984.71        1984          9
  341.13        1984.79        1984         10
  342.84        1984.88        1984         11
  344.32        1984.96        1984         12
 
  344.88        1985.04        1985          1
  345.62        1985.13        1985          2
  347.23        1985.21        1985          3
  347.62        1985.29        1985          4
  348.53        1985.38        1985          5
  347.87        1985.46        1985          6
  346.00        1985.54        1985          7
  343.86        1985.63        1985          8
  342.55        1985.71        1985          9
  342.57        1985.79        1985         10
  344.11        1985.88        1985         11
  345.49        1985.96        1985         12
 
  346.04        1986.04        1986          1
  346.70        1986.13        1986          2
  347.38        1986.21        1986          3
  349.38        1986.29        1986          4
  349.93        1986.38        1986          5
  349.26        1986.46        1986          6
  347.44        1986.54        1986          7
  345.55        1986.63        1986          8
  344.21        1986.71        1986          9
  343.67        1986.79        1986         10
  345.09        1986.88        1986         11
  346.27        1986.96        1986         12
 
  347.33        1987.04        1987          1
  347.82        1987.13        1987          2
  349.29        1987.21        1987          3
  350.91        1987.29        1987          4
  351.71        1987.38        1987          5
  350.94        1987.46        1987          6
  349.10        1987.54        1987          7
  346.77        1987.63        1987          8
  345.73        1987.71        1987          9

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