There will be two pollution processes in the Beijing-Tianjin-Hebei region, and nine cities in Hebei will launch a second-level emergency response to heavy pollution; Beijing will release its autumn and winter "keep blue" targets
Beijing PM2.5 will be controlled within 45 micrograms/m3 in the fourth quarter
Beijing’s air pollution targets in autumn and winter are broken down into various districts; there will be two pollution processes in the Beijing-Tianjin-Hebei region in the near future, and nine cities in Hebei will launch heavy pollution level II emergency response
After entering autumn and winter, atmospheric stratification tends to stabilize, and atmospheric diffusion conditions begin to turn into unfavorable conditions.
From the 11th to the 16th, there will be two pollution processes in the Beijing-Tianjin-Hebei region and the surrounding areas. From the 17th, the air quality will return to good quality under the influence of cold air.
In response, all cities in central and southern Hebei Province and Henan Province have initiated orange warnings and adopted differentiated emission reduction measures.
What does 45 micrograms mean?
In 2019, the annual average concentration of PM2.5 in Beijing was 42 micrograms/cubic meter, reaching “40+” for the first time, a record low since the monitoring records in 2013, and a decrease of 47.9% from the end of the “Twelfth Five-Year Plan” period. Among the "2+26" cities in the surrounding area, the concentration is the lowest and the decline is the largest.
The national standard for annual average PM2.5 concentration is 35 micrograms/m3.
According to calculations, the annual average concentration may increase by 1 microgram for every heavy polluted day. Therefore, Beijing proposes to "pull" the air pollution from microgram to microgram to scientifically, legally and meticulously control air pollution.
Beijing News reported on November 11 from the Ministry of Ecology and Environment that with the change of seasons, northern China has entered a stage of frequent pollution. According to the latest air quality forecast results, there will be two pollution processes in the Beijing-Tianjin-Hebei region and surrounding areas in the near future. , Respectively, from November 11 to 12 and November 14 to 16, where the second pollution process took a long time and the degree was relatively severe.
According to the Beijing Municipal Bureau of Ecology and Environment, on November 11, Beijing deployed and dispatched the 2020-2021 autumn and winter comprehensive air pollution control campaign, setting the city's goals for the fall and winter and the targets for each district.
Among them, from October to December 2020, the city’s average PM2.5 concentration target will be within 45 micrograms/m3, heavy pollution day for 1 day; the PM2.5 concentration target in each district will be between 40-50 micrograms/cubic meter, heavy pollution day The goal is between 0-3 days.
Temperature and humidity affect atmospheric diffusion conditions continue to be unfavorable
According to the Ministry of Ecology and Environment, starting from November 10, as the temperature rises, the atmospheric diffusion conditions in the Beijing-Tianjin-Hebei region and surrounding areas have turned into unfavorable conditions.
From the 11th to the 12th, under the continuous influence of unfavorable weather conditions, the central and southern regions of Beijing-Tianjin-Hebei, central and southern Shanxi, parts of western Shandong, and most parts of Henan will experience moderate pollution, and some cities along the mountain may reach severe pollution.
On the 13th, the area was affected by the weak cold air, and the diffusion conditions improved. Most areas were mainly polluted with good to light levels; the central and southern regions were affected by transmission and will still maintain light to moderate pollution.
From the 14th to the 16th, the weather conditions turned into unfavorable again. The southerly winds superimposed strong inversion. The Beijing-Tianjin-Hebei, central and southern Shanxi, western Shandong, and most areas of Henan were mainly polluted moderately to severely.
From the 14th to the 15th, the humidity is close to saturation, and the senses will further deviate in the actual pollution level.
Starting on the 17th, cold air began to affect northern China, and the air quality recovered to a good level. The improvement in southern cities was relatively late.
The proliferation conditions in Beijing deteriorated on November 11. A mild pollution process is expected from the afternoon to the morning of the 12th, and moderate-to-severe pollution will occur from the evening to the night of the 11th.
From the afternoon of the 12th to the 13th, the diffusion conditions improved, and the air quality is expected to be mainly good.
Diffusion conditions began to deteriorate again on the 14th, and the humidity increased, there will be a second pollution process, and the overall situation is mainly light pollution, which lasts until the 16th.
Among them, affected by high humidity on the 15th, some periods of time may reach moderate pollution.
From the 17th, affected by a new round of cold air, air quality gradually recovered.
The Ministry of Ecology and Environment will track and evaluate emergency emission reduction measures in various regions
According to the Ministry of Ecology and Environment, after entering autumn and winter, as the ground temperature decreases, the boundary layer decreases, the atmosphere stratification tends to stabilize, and the environmental capacity decreases compared with spring and summer.
In addition, some areas have already started heating. When the heating boiler is started, because the pollution control facilities are unstable, it will also increase the amount of pollutant emissions. Under static and stable conditions, regional pollution processes are prone to occur.
According to the results of air quality forecasts, all cities in central and southern Hebei Province and Henan Province have initiated orange warnings. In accordance with the latest revised heavy-polluted weather emergency emission reduction list, differentiated emission reduction measures have been adopted according to the performance levels of each company.
The Ministry of Ecology and Environment dispatched in various cities to strengthen supervision and designated assistance working groups will focus on supervising and inspecting the implementation of emergency emission reduction measures in various regions, tracking and evaluating the effects of emergency emission reduction measures in various regions, and supporting the scientific response to heavy pollution weather in various regions.
It is reported that 9 cities in Hebei, including Shijiazhuang, Qinhuangdao, Tangshan, Baoding, Cangzhou, Hengshui, Xingtai, Handan, and Dingzhou, have issued notices to initiate a Class II emergency response to severely polluted weather at 8 o'clock on November 9.
■ Focus
Beijing's air pollution targets in autumn and winter are broken down into districts
According to the Beijing Municipal Bureau of Ecology and Environment, due to adverse weather conditions and increased pollutant emissions, air pollution is prone to and frequent in autumn and winter, and the impact of heating emissions is superimposed. The pressure on air pollution prevention and control in the autumn and winter of 2020-2021 will be greater.
In order to implement the requirements of the "Beijing-Tianjin-Hebei and surrounding areas, and the Fenwei Plain in the autumn and winter air pollution comprehensive control action plan for 2020-2021", Beijing has deployed and dispatched the city's autumn and winter tackling actions to further refine, quantify and concreteize Beijing's tough measures , Clarify the lead department, responsible unit, completion time limit, etc.
Based on the actual situation of the jurisdiction, each district will implement detailed measures to tackle the tough problems in the jurisdiction to the township (street) level to ensure that the "last mile" ecological and environmental protection responsibilities are in place.
The city’s autumn and winter tackling goals are: October-December 2020 average PM2.5 concentration within 45 micrograms/cubic meter, heavy pollution day 1 day; January-March 2021 average PM2.5 concentration within 54 micrograms/cubic meter, heavy The pollution day is 5 days.
At the same time, the city's goals are divided into districts and the district goals are determined.
From October to December 2020, the PM2.5 concentration target for each district is between 40-50 micrograms/m3, and the target for heavy pollution days is between 0-3 days; from January to March 2021, the PM2.5 concentration target for each district is between Between 44-62 micrograms/cubic meter, the heavy pollution day target is between 3-9 days.
5 categories, 37 tough measures, tasks to defend "Beijing Blue"
The Beijing Municipal Bureau of Ecology and Environment stated that on the basis of strictly implementing the "Blue Sky Defense War 2020 Action Plan", focusing on energy, industry, transportation structure optimization, and emergency response to severely polluted weather, it has formed 5 categories and 37 critical measures. , Including managing vehicles according to law, source control, fine dust control, continuous coal suppression, precise emergency response, etc.
Among them, strictly implement the city-wide restriction policy for national three diesel trucks, and continue to carry out law enforcement inspections of heavy diesel vehicles at the entrance to Beijing and key roads in the city.
Basically complete the registration of non-road mobile machinery codes, continue to supervise and inspect non-road mobile machinery in key areas such as low-emission areas, construction sites, airports, and logistics parks, and record the credit information records of problem units.
Strictly control the quality of oil, severely crack down on and ban illegal refueling stations and mobile refueling tankers.
At the same time, a unified construction site visualized dust video monitoring platform will be built in the city, and platform information sharing will be realized.
Continue to monitor, rank, report, and disclose the residual amount of road dust, road dust load, and township (street) TSP, so as to ensure that the goal of 6 tons/km2·month of dust fall will be achieved by the end of the year.
In addition, we will orderly promote the conversion of coal to clean energy in mountainous villages, improve the operation and maintenance service mechanism of clean heating equipment, severely crack down on the illegal sales and use of coal by operating companies, strictly prevent the rebound of scattered coal reburning, and effectively consolidate the basic "No coal" results.
Beijing News reporter Deng Qi