On March 1, 2021, the China Environmental Monitoring Station, in conjunction with the Central Meteorological Station, the National Joint Center for Air Pollution Prevention and Control, the Northeast, South China, Southwest, Northwest, Yangtze River Delta Regional Air Quality Prediction and Prediction Center, and the Beijing Ecological Environment Monitoring Center, held a national air quality prediction conference for the first half of March (1-15).
In the first half of March, the diffusion conditions in most parts of the country were relatively favorable, and the overall air quality was mainly excellent. On March 5th and September 15th, local areas in northern China may experience mild to moderate PM2.5 pollution processes; On June 8th and 14th to 15th, due to the impact of sand and dust, moderate to severe pollution processes may occur locally in the northwest region.
Beijing-Tianjin-Hebei and surrounding areas: In the first half of March, most of the air quality in the region is dominated by good to light pollution, with the primary pollutant being PM2.5. On March 5th, the air quality in central Hebei and southern Shanxi was dominated by light to moderate pollution; On September 15th, a moderate pollution process may occur in the central and southern areas of Beijing, Tianjin, and Hebei.
Beijing: In the first half of March, the air quality is mainly excellent. In 3-4 days, the air quality is light to moderate pollution; On the 7th and 10th to 11th, there may be a slight pollution process; From 13th to 15th, there may be a slight to moderate pollution process.
Yangtze River Delta region: In the first half of March, the air quality in the central and northern regions of the region is mainly good to light pollution, with the primary pollutant being PM2.5; The air quality in the south is mainly excellent. On November 11th and 12th, the air quality in inland areas was mainly slightly polluted, and local areas may experience moderate pollution processes.
Jiangsu, Anhui, Shandong, and Henan regions: In the first half of March, the regional air quality is dominated by good to light pollution, with the primary pollutant being PM2.5. From July to December, a moderate pollution process may occur locally.
Fenwei Plain: In the first half of March, the regional air quality is dominated by good to light pollution, with the primary pollutant being PM2.5. From April to May, the air quality in southwestern Shanxi was dominated by light to moderate pollution.
Northeast China: In the first half of March, the air quality in most regions is mainly excellent. From March 4th to September 11th, the air quality in central and western Liaoning was mainly light to moderate pollution, while that in central and western Jilin and southern Heilongjiang was mainly good to light pollution; On 14-15, the air quality in the south of the region was dominated by good to light pollution, with the primary pollutant being PM2.5.
South China: In the first half of March, the air quality in most regions is mainly excellent. From March to April, the local air quality in Hubei Province was dominated by good to light pollution, with the primary pollutant being PM2.5; On 13-15, a slight O3 pollution process may occur in the southern part of the region.
Southwest region: In the first half of March, the air quality in most regions is mainly excellent. On December 15th, there may be a slight pollution process of PM2.5 or O3 in the urban agglomeration of Chengdu and Chongqing and Guizhou.
Northwest China: In the first half of March, the air quality in most regions is mainly good, and there may be a slight PM2.5 pollution process locally. On the 4th, there may be short-term, moderate or above pollution processes in western Inner Mongolia; From June to August, due to the impact of sand and dust, moderate to severe pollution processes may occur in southern and eastern Xinjiang; On the 14th and 15th, due to the impact of sand and dust, short-term moderate and above pollution processes may occur in western Inner Mongolia and most parts of Gansu, and moderate to severe pollution processes may occur in southern and eastern Xinjiang.