[Development of vehicular emission inventory in China]

The vehicular emission inventories with high spatial resolution of 40km x 40km are developed using GIS technique based on the statistic data from yearbooks about vehicles and roads at provincial level in China for the year 2002, and on the emission factors calculated by COPERT III model for each category of vehicles in urban, rural and highway traffic. The results show that the emissions of CO, NOx, NMVOC and PM10 are 28.15, 3.05, 4.61 and 1.11 million tons, respectively, principally from motorcycles and gasoline passenger cars. The emissions concentrate on the developed areas and those from 10.8%, 2.2%, 9.7% and 5.3% of country acreage account for 84% of CO, 55% of NMVOC, 48% of NOx, 48% of PM10 emissions, respectively. The emissions in the east of China and coastal areas are higher than those in the west and hinterland areas. The emission source strengths in the Yangtze River Delta, the Pearl River Delta and Beijing & Tianjin area are the highest.