National air resources assessment and its impact on air quality

In order to assess the air resource endowment in China, the atmospheric system was simulated and analyzed with WRF and CALMET models to calculate the A values distribution nationwide on a spatial resolution of 36 km×36 km. It was shown that the air quality endowments were higher in the west and north and lower in east and south, and higher in coastal plains and lower inland. There are three high-quality air resource endowment areas in China: Taihang and Changbai mountain areas, Kunlun and Tanggula mountain areas, and the coastal economic belt along Shandong Peninsula, Yangtze River Delta and Pearl River Delta. Major cities were selected to measure the effect of different spatial distribution of air resource endowment on the urban air quality by using CALPUFF model. In reference to Beijing, the contribution rates of air resource endowments to improve air quality at Chengdu, Shanghai, Qingdao, Zhengzhou and Guangzhou were 0.2%, 13.2%, 25.9%, 29.1% and 39.4%, respectively.