The minimum visibility is 40 meters. Why is it foggy in central and northern Zhejiang?

According to the analysis of Zhejiang Environmental Monitoring Center, it has been sunny and rainy in our province recently. Due to the influence of high ground pressure, there is basically no wind and the atmospheric diffusion conditions are poor. However, the high altitude is dominated by the north wind, which forms high-altitude transmission, and the transmission of external pollution seriously affects the air quality in our province.

Experts from the Central Meteorological Observatory said that from June 26th to 28th, the first cold wave occurred in central and eastern China since this winter. Under the influence of cold wave, the central and eastern regions are controlled by dry and cold air. The atmosphere in this area is stable, and the ground wind is small, which is not conducive to the diffusion of pollutants. At the same time, from165438+1October 29th, the cold wave ended, the temperature slowly rose, and the humidity near the ground slowly increased, which created conditions for the formation of smog.

Start early warning of air pollution and emergency actions of relevant departments.

Severe smog weather will inevitably bring serious air pollution. According to the data of the Environmental Monitoring Center of the Municipal Environmental Protection Bureau, from 2 pm the day before yesterday to 2 pm yesterday, the AQI index of air quality in our city was 377, of which the concentration of PM2.5 was 327 μ g/m3. However, with the smog dispersed yesterday afternoon, the urban air quality gradually improved.

At 2 pm, the reporter can clearly see the tallest building in Didang on the covered bridge of Shaoxing University of Arts and Sciences. On the official website AQI real-time release platform of the Municipal Environmental Protection Bureau, the concentration of PM2.5 in six monitoring stations in the urban area dropped below 200 μ g/m3 within 1 hour, among which Shaoxing technical secondary school station dropped below 100 μ g/m3.

It is understood that in order to effectively deal with air pollution and protect public health, from 4 pm the day before yesterday, the Municipal Office of the Leading Group for Air Pollution Emergency Work launched a yellow warning of air pollution in Yuecheng District, Keqiao District, Paojiang New District and High-tech Zone. During the early warning period, propaganda departments at all levels are required to carry out various forms of propaganda work to publicize health protection measures during air pollution to residents, and remind children, the elderly and susceptible people suffering from heart disease, asthma and respiratory diseases to stay indoors to avoid physical exertion; It is suggested to stop open-air sports competitions; Reduce or avoid outdoor activities; Appropriate protective measures should be taken for outdoor activities, such as wearing masks.

The Municipal Environmental Protection Bureau is conducting a comprehensive inspection of the thermal power enterprises in Yuecheng District, Keqiao District, Paojiang New District, Hi-tech Zone 18 and the enterprises in 1 1 which have a great impact on the air in the main city and have many complaints, and carrying out law enforcement investigation on key air pollution sources whose online monitoring exceeds the standard, so as to ensure the efficient operation of air pollution prevention and control facilities and reduce pollutant emissions.

Yuecheng District, Ke Qiao District Government and the administrative committees of the municipal development zones are organizing forces to strengthen inspections in their jurisdictions, put an end to burning garbage and straw, and stop open-air barbecues; And organize grassroots cadres to discourage residents from reducing or stopping open-air fitness activities.