(Click above for access to all the data files,
including the documentation file for this data base,
Carbon Dioxide Emission Estimates from Fossil-Fuel Burning,
Hydraulic Cement Production, and Gas Flaring for 1995 on a
One Degree Grid Cell Basis.
Antoinette L. Brenkert
This data package presents the gridded (one degree latitude by one degree
longitude) summed emissions from fossil-fuel burning, hydraulic cement
production and gas flaring for 1995. Analogous to the data presented in
NDP-058 (which includes estimates for 1950, 1960, 1970, 1980, and 1990),
national emission estimates from the 1995 United Nations Energy
Statistics Database (U.N., 1997), hydraulic cement production estimates
from the U.S. Department of Interior's Bureau of Mines (USDO,
1995), and supplemental data on gas flaring from the U.S.
Department of Energy's Energy Information Administration were processed
by Marland et al. (1997) following the methods of Marland and Rotty
(1984). The only change in the methodology used to calculate the
national CO2 emission estimates for 1995 was the implementation of
separate carbon coefficients for soft and hard coal; the emissions
estimates in NDP058 were calculated using a single carbon coefficient
to characterize the carbon content of all coals. To distribute the national
emission estimates from 1995 within each country, the population data base
developed by Li (1996a) and documented by CDIAC (DB1016: Li, 1996) was used
as proxy. Previously, Andres et al. (1996) had used a 1984 human population
data set (Goddard Institute of Space Studies, Lerner et al., 1988) as proxy
for gridding the 1950 through 1990 emission estimates within countries.
The structure of the gridded 1995 emission data file differs,
consequently, from the 1950-1990 gridded emission files (CDIAC:
NDP-058) in that individual grid cells may have been partitioned
into more than one country analogous to Li's population data base.
A country's representation in a grid cell is quantified by the
percentage of that country's land area in a particular grid cell and
identified by its United Nations identification code. The percentages
and United Nations identification codes were used to allocate the
national CO2 emissions estimates to the grid cells. Only those grid
cells with a United Nations identification code, population estimate
and carbon emission estimate are listed in the data file. Grid cells
representing more than one country are repeated for each country
represented. Note that to calculate national estimates from the data
file, one has to sum by United Nations identification code. To
calculate emissions for each grid cell or by latitude one has to sum
by grid cell (latitude and longitude), or by latitude, respectively.
A number of manipulations of Li's population data base were necessary
(and documented) to properly distribute the national 1995 CO2 emission
estimates over each country's grid cells.
(map by Richard Olson and Holly Gibbs, ORNL/ESD)
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