Heavy polluted weather appeared in Shaanxi.

Some time ago, sandstorms hit the whole north, which brought serious pollution to the north. The whole north is here? Yellow encirclement? As the center of the north, Beijing has also been seriously polluted by dust.

After the sandstorm, the influence of returning dust continued to expand, causing serious air pollution in Beijing.

Affected by the transit of northwest cold air system, the dust process originating in central and eastern Mongolia affected China, and the concentration of PM 10 in several cities in Inner Mongolia suddenly increased. As of 15 and 10, the hourly air quality index (AQI) values of 30 cities in most parts of Inner Mongolia, Mengganning Border Region, north-central Beijing-Tianjin-Hebei region, western Northeast China, northwestern Shanxi and eastern Xinjiang have reached the standard. Plot? ; The PM 10 hour concentration in 23 cities such as Ordos and Zhangjiakou exceeded 1000 μ g/m3.

With the southward movement of the dust belt, the scope of dust pollution continues to expand at 16. According to the monitoring of China National Environmental Monitoring Center, the air quality in Taiyuan, Jincheng, Linfen, Xuzhou, Lianyungang, Suqian, Bengbu, Huainan, Chuzhou, Fuyang, Jinan, Zibo, Zhengzhou, Kaifeng, Luoyang, Lanzhou, Xining and Yinchuan was seriously polluted at 0: 00 on March 6.

Usually, northwest cold air can clean up the pollution in the downstream area, but this time, the cold air carries high concentration of dust, and the sudden dust storm leads to the rapid deterioration of air quality in many places.

According to the Ministry of Ecology and Environment, on June 5438+06, as the dust gradually moved southward, the influence scope may spread to Central China and the central and northern parts of the Yangtze River Delta. At the same time, the south wind behind the high pressure is dominant in North China, and there is a risk of dust residue and backflow. Under the influence of this sandstorm, the air quality in the whole region shows that PM 10 is the main pollutant. It is predicted that 17- 18, affected by the northeast cold air and the downstream precipitation process, the regional dust process will gradually settle and clear.

Remind friends in the north once again that you must wear a mask when you go out. This is not only the requirement of epidemic prevention, but also the responsibility for your own health.