

_M_a_u_n_a _L_o_a _A_t_m_o_s_p_h_e_r_i_c _C_O_2 _C_o_n_c_e_n_t_r_a_t_i_o_n

     data(co2)

_F_o_r_m_a_t:

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

_D_e_s_c_r_i_p_t_i_o_n:

     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
     linearly between the values for January and May of
     1964.

_S_o_u_r_c_e:

     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/maunaloa.co2>.

_R_e_f_e_r_e_n_c_e_s:

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

