

   MMaauunnaa LLooaa AAttmmoosspphheerriicc CCOO22 CCoonncceennttrraattiioonn

        data(co2)

   FFoorrmmaatt::

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

   DDeessccrriippttiioonn::

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

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

   SSoouurrccee::

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

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

   RReeffeerreenncceess::

        Cleveland, W. S. (1993).  Visualizing Data.  New Jer-
        sey: Summit Press.

