Houghton, R. A., and J. L. Hackler. 2001. Carbon Flux to the Atmosphere from Land-Use Changes: 1850 to 1990. ORNL/CDIAC-131, NDP-050/R1. Carbon Dioxide Information Analysis Center, U.S. Department of Energy, Oak Ridge National Laboratory, Oak Ridge, Tennessee, U.S.A.

Table 4. Contents and format of compare.dat (File 4) 

Variable  Variable  Variable  Starting  Ending  Units      Spreadsheet  Definition and
          type      width     column    column             column       comments

YEAR      Integer   4         1         4       year       A            Year
HETAL83   Real      6         13        18      1000 Mg C  B            Global total net flux, from
                                                                        Houghton et al. (1983)
HS90      Real      6         31        36      1000 Mg C  C            Global total net flux, from
                                                                        Houghton and Skole (1990), as corrected
HH95      Real      5         51        55      1000 Mg C  D            Global total net flux, from
                                                                        Houghton and Hackler (1995)
H99       Real      5         63        67      1000 Mg C  E            Global total net flux, from
                                                                        Houghton (1999)