The Ministry of Ecology and Environment released the results of the national air quality forecast consultation in the second half of February

　　China News Service, February 15. According to the WeChat public account of the Ministry of Ecology and Environment, on February 15, 2024, the China Environmental Monitoring Station, in conjunction with the Central Meteorological Observatory, the National Joint Center for Atmospheric Pollution Prevention and Control, Northeast China, South China, Southwest China, Northwest China, and the Yangtze River Delta The Regional Air Quality Forecasting Center and the Beijing Ecological Environment Monitoring Center will conduct a national air quality forecast consultation in the second half of February 2024 (February 16-February 29).

　　In the second half of February, the air quality in most parts of the country was mainly excellent, with good to light pollution in most of the central and southern Beijing-Tianjin-Hebei and surrounding areas, the central and northern Yangtze River Delta, the Fenwei Plain and the northwest region. Among them, moderate and above pollution may occur during certain periods in the southwestern part of Heilongjiang, the central and southern parts of the Beijing-Tianjin-Hebei and surrounding areas, the central and northern part of the Yangtze River Delta, parts of Guanzhong in Shaanxi, and the eastern part of the northwest region. Affected by sand and dust weather, cities in eastern Xinjiang may experience moderate pollution during certain periods of time, and cities on the northern slopes of the Tianshan Mountains and southern Xinjiang may experience moderate and above pollution during certain periods of time.

　　Beijing-Tianjin-Hebei and surrounding areas: In the second half of February, the northern part of the region is mainly fine, and the central and southern parts are mainly good to lightly polluted. On the 18th and 26th to 29th, moderate pollution may occur in the central and southern areas. On the 16th, most of the region was controlled by strong southerly winds, and diffusion conditions were average. Most of the region was expected to be mainly fine, with light pollution possible in the central part of Beijing-Tianjin-Hebei. On the 17th, most of the region was still affected by southerly winds. The wind speed has decreased compared with the previous day, the relative humidity has increased slightly, and the diffusion conditions have deteriorated slightly, which is conducive to the accumulation of pollutants. Most of the area is expected to be dominated by good to light pollution; on the 18th, starting from noon on the 18th, the central and northern parts of the area The wind gradually turns from southerly to northerly, with the southerly wind prevailing in the south and turning to northerly at night. There will be weak precipitation in parts of eastern Henan, Shandong, and Hebei. Most of the area is expected to be dominated by good to light pollution. Central Hebei Moderate pollution may occur in the south; from the 19th to the 22nd, affected by a new round of strong cold air, rainfall and snowfall may occur in the central and southern parts of the region, and the air quality in most of the region has improved to excellent levels. On the 19th, affected by transmission, southern Hebei and Mild pollution may occur in parts of Henan; from the 23rd to the 25th, the wind field converges in the central and southern parts of the region, a temperature inversion occurs in southern Hebei and Henan, and the diffusion conditions worsen, and a mild pollution process is expected to occur in the southern part of the region; from the 26th to the 29th, the temperature It continues to rise, diffusion conditions are unfavorable, and there is a risk of mild or above pollution. The primary pollutants are mainly PM2.5 or PM10.

　　Beijing: In the second half of February, conditions for the spread of air pollution in Beijing were generally favorable, and the air quality is expected to be mainly good. Among them, from the 16th to the 17th, there will be low pressure on the ground, southwesterly winds, rising temperatures, and unfavorable diffusion conditions. The air quality is expected to be good to slightly polluted; from the 18th to the 25th, strong cold air will cause a substantial cooling, with cold and high pressure on the ground. The northerly wind will prevail, and the diffusion conditions will continue to be favorable, and the air quality is expected to be mainly good. From the 26th to the 29th, there will be low surface pressure, the temperature will rise, and the diffusion conditions will be unfavorable, and the air quality is expected to be good to lightly polluted. The primary pollutant is PM2.5.

　　Yangtze River Delta region: In the second half of February, most of the region is mainly fine, and there may be mild pollution in the central and northern parts, with moderate pollution in some areas from the 26th to the 29th. Among them, on the 16th, the Yangtze River Delta was controlled by high pressure and turned to the rear part of the high pressure, with precipitation passing through. The overall condition was mainly good, and the northern part was lightly polluted. From the 17th to the 18th, the area was located in the front part of the low pressure, with mainly good conditions in the central and northern parts, and locally. There was slight pollution in the short term, and the southern part was excellent; from the 19th to the 22nd, there was precipitation due to the influence of cold air, and the overall quality was excellent; from the 23rd to the 25th, the area was located at the bottom of high pressure, with precipitation, and the overall quality was excellent; from the 26th to the 29th, it was controlled by high pressure, and the overall quality was excellent. The central and northern parts are well to lightly polluted, and some areas are moderately polluted, while the south is mainly polluted. The primary pollutants are PM2.5, PM10 or NO2.

　　Fenwei Plain: In the second half of February, the air quality in most of the region is mainly good to lightly polluted. Moderate or above pollution may occur on the 18th, 22-24th, 26-27th, and 29th. Among them, on the 16th and 17th, most of the region was affected by the southerly airflow, the humidity increased, and the diffusion conditions gradually deteriorated. The air quality in most of the region is mainly mild pollution, and moderate pollution may occur in parts of Guanzhong on the 17th. On the 18th, affected by frontal convergence before noon, diffusion conditions were unfavorable; affected by upstream dust transmission in the afternoon, blowing sand or floating dust may occur in most areas. The air quality in most of the region is dominated by light to moderate pollution, and short-term severe pollution may occur during periods affected by sand and dust. From the 19th to the 20th, due to the influence of cold air and precipitation, diffusion conditions were good in most parts of the region. The air quality in most of the region is mainly good to slightly polluted. From the 21st to the 25th, the air pressure field in most of the region weakened, and the diffusion conditions gradually deteriorated; the air quality was mainly mildly polluted. From the 22nd to the 25th, some cities in central Shanxi and Guanzhong, Shaanxi may experience moderate pollution, while other areas were good to light. Mainly pollution. From the 26th to the 29th, the eastern part of the region was affected by the strengthening of high-pressure bottom easterly airflow, and the diffusion conditions improved slightly. The western part continued to be affected by the weak surface pressure field, and the atmospheric diffusion conditions were average. The air quality was mainly lightly polluted, and local areas in Guanzhong may Moderate contamination occurs. The primary pollutants are mainly PM2.5 or PM10.

　　Northeastern region: In the second half of February, affected by multiple cold air processes, diffusion conditions are good. It is expected that the air quality in most parts of the region will be mainly excellent, and local areas may reach mild pollution. During the intermittent period of cold air, from the 16th to the 18th, the central and western parts of Liaoning, most of Jilin, and southern and eastern Heilongjiang were dominated by good to light pollution. From the 17th to the 18th, the southwestern Heilongjiang may reach moderate pollution locally; from the 26th to the 18th, On the 29th, central and western Liaoning, central Jilin, southern and eastern Heilongjiang were dominated by good to light pollution, and central Jilin may reach moderate pollution on the 28th and 29th. The air quality in other parts of the region is mainly excellent. The primary pollutant is PM2.5 or PM10.

　　South China: In the second half of February, cold air activities and air troughs affected the South China region more frequently, causing more scattered precipitation. The regional atmospheric diffusion conditions were generally good, mainly excellent in the southern part of the region. Among them, from the 16th to the 17th, under weak wind conditions, there was good to light pollution in the central and western parts of the Pearl River Delta, eastern and western Guangdong, and northwestern Guangxi; from the 19th to the 20th, due to the influence of local emissions and transmission, there was good to light pollution in most parts of Hubei and Hunan. Mild pollution, short-term light to moderate pollution in central Hubei and northern Hunan; from 24th to 26th, affected by the discharge and transmission of fireworks and firecrackers during the Lantern Festival, most of Hubei and Hunan, northwest Guangxi, the Pearl River Delta, and eastern and western Guangdong Mild pollution, short-term light to moderate pollution in central and eastern Hubei and central and northern Hunan; on the 28th and 29th, good to light pollution in northern Hunan and central and eastern Hubei. The primary pollutant is mainly PM2.5.

　　Southwest region: In the second half of February, the overall diffusion conditions in the southwest region are average, with most of the region being fine. It is expected that 1-2 pollution processes will occur in some cities in Sichuan, Chongqing and Guizhou in the late middle and late middle of the second half, with mild pollution as the main problem. host. Among them, on the 16th, the air quality in some cities in western Guizhou was good to lightly polluted, and most of the rest were excellent; from the 17th to the 20th, some cities in the Chengdu Plain, southern Sichuan, northeastern Sichuan and Chongqing had good to lightly polluted air quality, and the air quality in the southwestern region was good. The remaining areas were mainly excellent; from the 21st to the 24th, most cities in the southwest region were mainly excellent; from the 25th to the 28th, some cities in the Chengdu Plain, southern Sichuan and northeastern Sichuan were good to slightly polluted, and most of the remaining air quality was excellent. Mainly; on the 29th, most cities in the southwest region were mainly fine. The primary pollutant is PM2.5.

　　Northwest region: In the second half of February, the air quality in most of the region is mainly good, with local mild pollution possible, and moderate pollution possible in the eastern part on the 18th and 22nd-29th. Among them, from the 16th to the 17th, the central and eastern parts were affected by surface low pressure, and the atmospheric diffusion conditions were average, and the diffusion conditions in other areas were good; the air quality was mainly good, and local light pollution may occur. On the 17th, Inner Mongolia may be affected by sand and dust. Moderate to severe contamination occurs. On the 18th, the surface wind speed increased in most parts of the region and the atmospheric diffusion conditions were good. Short-term sand blowing weather may occur in western Inner Mongolia, northern Shaanxi, and most of Ningxia; the air quality is mainly mild pollution, and moderate pollution may occur locally. Severe pollution may occur in western Inner Mongolia. From the 19th to the 21st, affected by the passage of cold air, most of the region has good diffusion conditions; the air quality is mainly good, and slight pollution may occur in the east. From the 22nd to the 24th, most of the ground in the region was affected by a weak air pressure field, and atmospheric diffusion conditions were average; the air quality was mainly good, and the air quality in the eastern region was mainly lightly polluted, with moderate pollution possible locally. From the 25th to the 28th, due to the intermittent weak northwest airflow, diffusion conditions were average in most of the region. Affected by the weak pressure field, the atmospheric diffusion conditions gradually deteriorated in the eastern region. The air quality was mainly good, and the air quality in the eastern region was light to moderate. Mainly pollution. On the 29th, the central part of the region was affected by the passage of cold air, and the atmospheric diffusion conditions were good. The eastern part was affected by frontal convergence, and the atmospheric diffusion conditions were poor. The air quality was mainly good, and the eastern part was mainly lightly to moderately polluted, with possible local pollution. Severe pollution occurs for a short period of time. The primary pollutants are mainly PM10 or PM2.5. In Xinjiang, from the 16th to the 29th, the urban air quality in northern Xinjiang was mainly excellent; the urban air quality on the northern slope of the Tianshan Mountains was mainly good to lightly polluted. From the 22nd to the 24th, light to moderate pollution may occur, and some cities may experience severe pollution; The urban air quality in eastern Xinjiang is mainly good to slightly polluted, with light to moderate pollution occurring on the 17th-18th and 26th-27th due to sand and dust weather; the urban air quality in southern Xinjiang is mainly light to moderately polluted, with 17 —Severe to serious pollution occurred due to sand and dust weather on the 19th and 27th-29th. The primary pollutants are mainly PM10 or PM2.5.