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ISLSCP II Carbon Dioxide Emissions from Fossil Fuels, Cement, and Gas Flaring
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Revision date: June 28, 2011


This data set contains decadal (1950, 1960, 1970, 1980, 1990 and 1995) estimates of gridded fossil-fuel emissions, expressed in 1,000 metric tons C per year per one degree latitude by one degree longitude. The CO2 emissions are the summed emissions from fossil-fuel burning, hydraulic cement production, and gas flaring. The years 1950 to 1990 were developed and compiled using somewhat different procedures and information than the 1995 data. The national annual estimates (Boden et al., 1996) from 1950 to 1990 were allocated to one degree grid cells based on gridded information on national boundaries and political units, and a 1984 gridded human population map (Andres et al., 1996). For the 1995 data, the population data base developed by Li (1996a) and documented by CDIAC (DB1016: Li, 1996b) was used as proxy to grid the 1995 emission estimates. There is one *.zip data file with this data set at 1.0 degree spatial resolution.

Additional Documentation:

This data set is one of the products of the International Satellite Land-Surface Climatology Project, Initiative II (ISLSCP II) data collection which contains 50 global time series data sets for the ten-year period 1986 to 1995. A complete description of the data, it's derivation, acknowledgements, and references provided by the ISLSCP II Data Management Staff is included with this data set as a companion file named 1_co2_emissions_doc.pdf.

ISLSCP II is a consistent collection of data sets that were compiled from existing data sources and algorithms, and were designed to satisfy the needs of modelers and investigators of the global carbon, water and energy cycle. The data were acquired from a number of U.S. and international agencies, universities, and institutions. The data and documentation have undergone two peer reviews.

ISLSCP is one of several projects of Global Energy and Water Cycle Experiment (GEWEX) [] and has the lead role in addressing land-atmosphere interactions --process modeling, data retrieval algorithms, field experiment design and execution, and the development of global data sets.

Related Data Sets:

Data Citation:

Cite this data set as follows:

Andres, R.J., G. Marland, I. Fung, E. Matthews, and A.L. Brenkert. 2011. ISLSCP II Carbon Dioxide Emissions from Fossil Fuels, Cement, and Gas Flaring. In Hall, Forrest G., G. Collatz, B. Meeson, S. Los, E. Brown de Colstoun, and D. Landis (eds.). ISLSCP Initiative II Collection.  Data set. Available on-line [] from Oak Ridge National Laboratory Distributed Active Archive Center, Oak Ridge, Tennessee, U.S.A. doi:10.3334/ORNLDAAC/1021

File Information:

The archived data sets for ISLSCP II have been organized by categories. This data set is in the Carbon category.

Data Set Spatial Extent: Global gridded

Westernmost Longitude: -180 W

Easternmost Longitude: 180 E

Northernmost Latitude: 90 N

Southernmost Latitude: -90 S

Projection: Geographic

Data Set Spatial Resolution: 1.0 degree in both latitude and longitude

Data Set Temporal Extent: Decadal (1950, 1960, 1970, 1980, 1990, and 1995)

Data File Format

All of the data files in each data set within the ISLSCP Initiative II data collection are in standard ESRI ArcGIS ASCII grid format.  The file format consists of numerical fields of varying length, which are delimited by a single space and arranged in columns and rows. There is one *.zip file with this data set,  in 1.0 degree (1deg) spatial resolution.

File Name:  When extrapolated, this file contains 3 files for each of the 6 years, or 18 files (X is the 4-digit year (1950, 1960, 1970, 1980, 1990, or 1995):

co2_emis_1d_X.asc: Gridded ASCII maps of the global carbon dioxide emissions  ("co2_emis" stands for CO2 emissions).

co2_emis_1d_X.dif:  ASCII tables of "differences", or points in the original files that did not match the Land/Water mask used in this International Satellite Land Surface Climatology Project (ISLSCP) Initiative II data collection, and were removed from the ASCII map files.

co2_emis_1d_X_changemap.asc: Gridded ASCII map showing the differences between the ISLSCP II land/water mask and the original data set: All points with negative values (“-1”) are those where the ISLSCP II mask showed water but where the original data set showed land (i.e. CO2 emissions>0) and this point was removed. All points with a value of zero are those points where the two land/water masks agreed.

Two additional files named ndp058.pdf and ndp058a.pdf contain the original documentation available from the Carbon Dioxide Information Analysis Center (CDIAC).

Please refer to 0_co2_emissions_readme.txt for a more complete description of the data files and naming conventions.


Andres, R.J., G. Marland, I. Fung, E. Matthews, and A.L. Brenkert. 1996b. Geographic patterns of carbon dioxide emissions from fossil-fuel burning, hydraulic cement production, and gas flaring on a one degree by one degree grid cell basis: 1950 to 1990. ORNL/CDIAC-97, NDP-058. Carbon Dioxide Analysis Center, Oak Ridge, Tennessee. Available from

Boden, T.A., G. Marland, and R.J. Andres, 1996. Estimates of global, regional, and national annual CO2 emissions from fossil-fuel burning, hydraulic cement production, and gas flaring: 1950-1992, Rep. ORNL/CDIAC-90, NDP-030/R6, 600 pp., Oak Ridge Nat. Lab., Oak Ridge, Tenn.

Li., Y.F., A. McMillan, and M.T. Scholtz. 1996a. Global HCH usage with 1 degrees x 1 degrees longitude/latitude resolution. Environmental Science & Technology 30:3525-33. doi:10.1021/es960312v

Li., Y.F. 1996b. Global Population Distribution (1990), Terrestrial Area and Country Name Information on a One by One Degree Grid Cell Basis. ORNL/CDIAC-96, DB1016, Carbon Dioxide Analysis Center, Oak Ridge, Tenn.

Data Access:

These data are available through the Oak Ridge National Laboratory (ORNL) Distributed Active Archive Center (DAAC)  [].

Data Archive Contact Information:

Telephone: +1 (865) 241-3952