An OC emission inventory with 70 detailed source information was compiled.
Newly published emission factors, especially those in developing countries, were taken into consideration.
A new fuel-consumption data product (PKU-Fuel-2007) was used to reduce spatial bias of this inventory.
Global OC emissions peaked around the year 1990 and future emission reduction is expected.
Emission intensity and the OC/PM2.5 ratio for the primary emissions have decreased continuously.