The Ministry of Ecology and Environment releases the results of the national air quality forecast consultation for the first half of April

　　China News Service, April 1. The Ministry of Ecology and Environment released the results of the national air quality forecast consultation for the first half of April on the official WeChat account on the 1st.

　　On March 31, 2024, the China General Environmental Monitoring Station jointly launched the 2024 National air quality forecast consultation in the first half of April (April 1-April 15).

　　In the first half of April, the air quality in most of the northern Beijing-Tianjin-Hebei region and surrounding areas, the northern northeastern region, the southwest region and northern northern Xinjiang was mainly excellent, while the air quality in the rest of the region was mainly good to lightly polluted. Among them, due to the early impact of sand and dust transmission, moderate or above pollution may occur in the central and northern Yangtze River Delta, central and western Ningxia, and eastern Xinjiang. In the mid-term, the Fenwei Plain is expected to be affected by sand and dust transmission again, and moderate or above pollution may occur.

　　Beijing-Tianjin-Hebei and surrounding areas: In the first half of April, the northern part of the region was mainly fine, while the central and southern parts were mainly good to lightly polluted. Among them, on the 1st, the ground wind was mainly southerly, and the air quality in the northern part of the region was excellent. Mild pollution may occur in the central and southern parts of the Beijing-Tianjin-Hebei region, eastern Shandong, and northern Henan; from the 2nd to the 4th, the diffusion conditions were favorable, and most of the region was Mainly good, with local light pollution possible; on the 5th to 7th, as the ground turns to high pressure, the air quality in the northern part of the region is mainly good, with light pollution possible in the central and southern Beijing-Tianjin-Hebei region, eastern Shandong, and northern Henan; 8 -On the 15th, affected by multiple waves of weak cold air, regional diffusion conditions were generally favorable, and the air quality was mainly good. The primary pollutants are mainly PM10, PM2.5 and O₃.

　　Beijing: In the first half of April, the air quality in Beijing was mainly good, and mild pollution may occur during some periods. Among them, from the 1st to the 4th, due to the influence of high pressure from the north to the high pressure in the east, the diffusion conditions are good, and the air quality is expected to be good; from the 5th to the 6th, due to the pressure equalization effect, the diffusion conditions are average, and the air quality is expected to be mainly good. Mild pollution may be achieved in some periods; from the 7th to the 15th, the cold air activity is weak, the temperature is generally high, and the diffusion conditions are average. Among them, mild pollution may occur on the 10th and 12-13th. The primary pollutant is PM2.5.

　　Yangtze River Delta region: In the first half of April, most of the region was polluted with good pollution, and the northern part was mainly polluted with good to light pollution. Among them, on the 1st, the Yangtze River Delta was affected by the low pressure trough and became controlled by the weakened air pressure field. The central and northern parts were good to lightly polluted, and the southern part was mainly good. From the 2nd to the 5th, due to the influence of the low pressure trough, precipitation processes were frequent, and the overall quality was mainly good. ; From the 6th to the 8th, controlled by the weak air pressure field, the central and northern parts were lightly polluted; from the 9th to the 13th, affected by the low pressure trough, there was precipitation in the south, mainly fine, and the northern part was lightly polluted. The primary pollutants are PM2.5, PM10 or O₃.

　　Fenwei Plain: In the first half of April, the overall regional air quality was mainly good, with short-term mild pollution in some places. Among them, on the 1st, the surface pressure field was weak, the diffusion conditions were average, and most of the area was mainly good, and short-term light pollution may occur locally; on the 2nd and 3rd, affected by precipitation, the wet cleaning conditions were favorable, and most of the area was Mainly good; on the 4th and 5th, affected by the rear part of the high pressure, the diffusion conditions are average, most of the area is mainly good, and short-term light pollution may occur locally; on the 6th, there is precipitation in the western part of the area, and the pressure field in the east Weaker, mainly good in the west of the region, and mainly good in the east, and short-term light pollution may occur locally; on the 7th and 8th, the pressure field is weak, and diffusion conditions are average. Most of the region is mainly good, and locally Short-term light pollution may occur; from the 9th to the 10th, the southerly wind will strengthen, mainly good, and short-term light pollution may occur in some areas; from the 11th to the 13th, the temperature will be higher, which is conducive to the generation of O₃, and most of the area will be Mainly good, local light pollution may occur for a short time; on the 14th and 15th, affected by weak cold air, diffusion conditions are good, most of the area is mainly good, and short-term light pollution may occur locally. The primary pollutants are PM10, PM2.5 or O₃.

　　Northeast Region: In the first half of April, due to the alternating influence of cold and warm air processes, the diffusion conditions in the central and northern parts of the region are better, while the diffusion conditions in the southern part of the region are average. It is expected that the air quality in most parts of the region will be mainly excellent, and slight pollution may occur locally. Among them, on the 1st and 2nd, the air quality in central and western Liaoning was mainly good to lightly polluted; on the 4th and 7th and 10th and 13th, the air quality in southwestern Heilongjiang, central Jilin, central and western Liaoning, and southeastern Inner Mongolia was good to lightly polluted. Lord. The primary pollutants are PM10, PM2.5 or O₃. If large-scale straw burning occurs, the pollution level may increase by 1-2 levels.

　　South China: In the first half of April, affected by the intersection of cold and warm air currents and precipitation, regional atmospheric diffusion conditions were generally good, and the air quality was mainly excellent. Among them, from the 7th to the 9th, the central and eastern parts of Hubei were well to lightly polluted; from the 10th to the 12th, the central Hubei and the central Pearl River Delta were well to lightly polluted. The primary pollutants are mainly O₃ or PM2.5.

　　Southwest region: In the first half of April, overall spreading conditions in the region were average. There were about three pollution processes in the Sichuan Basin, mainly mild pollution. In early April, there was composite pollution of PM2.5 and O₃. Some cities in Yunnan had about two pollution processes. Some cities in Guizhou had short-term mild pollution in the early part of the year, and the rest were The area is mainly excellent. Among them, on the 1st, some cities in the Chengdu Plain, southern Sichuan, and southwestern Yunnan were rated as good to slightly polluted, and the rest of the areas were mainly excellent; from 2 to 6, some cities in the southwestern Yunnan, southeastern Yunnan, and southern Guizhou were rated as good to slightly polluted. Mild pollution, and mainly good in other areas; from 7 to 9, the air quality in most cities in the region was mainly good; from 10 to 12, the air quality in Chengdu Plain, southern Sichuan, southeastern and southwestern Yunnan and some cities was good to light Pollution, the rest of the areas were mainly good; on the 13th, some cities in southeastern and southwestern Yunnan were good to slightly polluted, and the rest of the areas were mainly good; on the 14th and 15th, the Chengdu Plain, southern Sichuan, southeastern and southwestern Yunnan were polluted. Some cities in such areas are classified as good to lightly polluted, while the remaining areas are mainly excellent. The primary pollutant is PM2.5 or O₃.

　　Northwest region: In the first half of April, the air quality in most of the region was mainly good. On the 1st, 5th to 6th, and 9th to 12th, the surface wind speed was relatively high in some areas of the region, and sand and dust weather processes may occur. Among them, on the 1st, due to the influence of cold air, most of the region will be polluted. Sand or floating dust may occur in Hexi, Gansu, most of Ningxia, and western Inner Mongolia. The weather will be dominated by fine to light pollution. Moderate to moderate pollution may occur in central and western Ningxia. degree of pollution; on the 2nd to 4th, the diffusion conditions were good, and most of the area was mainly good, and light pollution may occur locally; on the 5th and 6th, the surface wind speed was high, and most of the area was mainly good, and Hexi and Gansu provinces Most of Ningxia may experience blowing sand or dust, with mainly good to light pollution. Moderate pollution may occur in central and western Ningxia. On the 7th and 8th, the air pressure field weakens and diffusion conditions deteriorate, with good to light pollution in most areas. Mainly, local light pollution may occur; on the 9th to 10th, the surface wind speed will be relatively high, and there may be short-term sand or dust weather in northern Ningxia, parts of western Inner Mongolia, northern Shaanxi, and northern Shanxi, and most of the region will be fine. Mainly, local mild pollution may occur, and areas affected by sand and dust may experience short-term moderate or above pollution; on the 11th and 12th, affected by weak cold air, diffusion conditions are good, and most of Ningxia's surface wind speeds are relatively high, which may When blowing sand or dust occurs, most of the area will be fine, and light pollution may occur locally. On the 13th to 15th, the air pressure field will weaken, diffusion conditions will be average, and most of the area will be fine. The primary pollutants are mainly PM10, PM2.5 or O₃. Xinjiang: From 1 to 15 days, the urban air quality in northern northern Xinjiang and the northern slope of the Tianshan Mountains was excellent; the urban air quality in eastern and southern Xinjiang was mainly good to slightly polluted. Among them, on the 1st, Dongjiang experienced moderate pollution due to sand and dust, and Hotan experienced severe to severe pollution due to sand and dust. The primary pollutants are mainly PM10 or O₃.