co2                  package:stats                  R Documentation

Mauna Loa Atmospheric CO2 Concentration

Description:

     Atmospheric concentrations of CO2 are expressed in parts per
     million (ppm) and reported in the preliminary 1997 SIO manometric
     mole fraction scale.

Usage:

     data(co2)

Format:

     A time series of 468 observations; monthly from 1959 to 1997.

Details:

     The values for February, March and April of 1964 were missing and
     have been obtained by interpolating linearly between the values
     for January and May of 1964.

Source:

     Keeling, C. D. and  Whorf, T. P., Scripps Institution of
     Oceanography (SIO), University of California, La Jolla, California
     USA 92093-0220.

     <URL: ftp://cdiac.esd.ornl.gov/pub/maunaloa-co2/maunaloa.co2>.

References:

     Cleveland, W. S. (1993) _Visualizing Data_. New Jersey: Summit
     Press.

Examples:

     data(co2)
     plot(co2, ylab = expression("Atmospheric concentration of CO"[2]),
          las = 1)
     title(main = "co2 data set")

