PM2.5 explosion table air quality is seriously worrying

On these days, three regions in Jiangsu, Zhejiang and Shanghai were heavily surrounded by haze, and all masks went out. There are already 25 provinces (autonomous regions and municipalities) with different degrees of "inviting." In these areas, the most serious smog is the Yangtze River Delta region.

Jiangsu:

According to the latest data released by the Nanjing Environmental Protection Agency this morning, the city’s air quality index was 338, heavy pollution, and air quality was rated at level 6. The primary pollutant is still PM2.5. Yesterday, the impact of serious pollution on the province of Jiangsu also continued. As of 5pm, the provinces of 13 provinces except Suzhou, Suqian and Nantong were heavily polluted. The other 10 cities were heavily polluted. Taizhou was the most polluting city and the AQI index reached 420.

Yesterday morning, in the sky above the coal port of Nanjing's Gulou District, some citizens actually saw two suns in the sky, one by one. They were still very close to each other, and lasted about one minute before and after. "These two suns, one large above and one below, are indeed very rare, but certainly the big sun above is true, the following small sun is false." A citizen said.

Optical experts said that this is actually a phenomenon known as a magical day or holiday, and it is an optical phenomenon that is often produced in the atmosphere. According to reports, there are translucent thin clouds in the sky, and because there are many floating objects in the air on a sunny day, in a coincidence situation, these floating objects may be formed when they are exposed to the water vapor in the clouds. Polygonal prisms in optical instruments, just after the sun shines on these floating objects, refraction phenomenon will form a magic day phenomenon.

As of 6 o'clock yesterday evening, the Nanjing Air Quality Index (AQI) exceeded 300 heavily contaminated red lines for more than 40 hours. In the evening of the same day, the Nanjing Air Pollution Early Warning and Emergency Command Center informed that the air “red warning” was maintained. With the approval of the Nanjing Municipal Government, kindergartens, primary and secondary schools continued to suspend classes, and the city’s red alert response measures continued to be implemented.

Lianyungang, Taizhou, and Huai'an have more serious pollution than in Nanjing. Why haven't other cities started red warnings, and Nanjing has just started a red alert? “This is because the local government issued the earliest warning in Nanjing before the introduction of the guidelines of the Ministry of Environmental Protection.” The relevant person in charge of the Jiangsu Provincial Environmental Protection Agency stated that Nanjing introduced the early warning standards in February this year, and the national opinion and Jiangsu standards It was only introduced in April. According to the Jiangsu early warning contingency plan, it is necessary to start the highest-level warning when the AQI pollution index reaches 500, that is, the first-level warning.

The relevant officials of the Jiangsu Provincial Environmental Protection Agency also revealed that at present, the Nanjing environmental protection department also plans to submit an application to the Nanjing Municipal Government. In accordance with the guidelines of Jiangsu Province, the Nanjing emergency plan for pollution should be redrafted to raise the standard for red warning. It is very likely that Nanjing will issue a red alert only when the pollution index reaches 500, and it may also consider the bus limit plan. In addition, Nanjing has been studying and improving the emergency plan for heavy pollution, and the flexible work of enterprises and institutions is an important part of this.

“Once we work flexibly, it means that citizens will reduce their travels, and a large number of motor vehicles will be parked and work sites will be shut down.” The relevant person in charge of the Provincial Environmental Protection Office said that this would have a buffer effect on pollution. Once the plan is submitted to the municipal government, it must be formally approved after consultation to be implemented. In response, the person in charge of the Office of Atmospheric Affairs of the Provincial Environmental Protection Office stated that in the provincial Environmental Protection Agency's plan, there were early suggestions for the suspension of kindergartens in primary and secondary schools, and the flexible working system of enterprises and institutions was not mentioned. “It is worth considering. Important measure."

Zhejiang:

Xiasha PM2.5 concentration 536

The implementation of the emergency plan in Hangzhou last night at 8 o'clock in the evening, PM2.5 concentration in Xiasha reached 536 microg/m3. What should I do in Hangzhou? Yesterday, this question finally had the answer. Yesterday afternoon, the Hangzhou Environmental Protection Bureau issued a preliminary draft of the “Heavy Air Pollution Emergency Preparedness Plan (Trial) in Hangzhou”. This plan has been passed in principle at the mayor’s office meeting and yesterday it has been referenced to implement the plan. This plan is applicable to the urban areas of Hangzhou (including Shangcheng District, Xiacheng District, Xihu District, Gongshu District, Jianggan District, Binjiang District, Xiaoshan District and Yuhang District).

The Hangzhou Environmental Protection Bureau explained that after starting the second-level emergency response, it will stop 1/2 of official vehicles and start the first-class emergency response, which will stop 2/3 of the official vehicles. “This will play an exemplary role. After the motor vehicle is stopped, pollutants emitted from the exhaust gas will inevitably be reduced."

Anhui:

Hefei City Environmental Protection Bureau denied that air quality was the worst in the country. Hefei won the 74 worst air champion in the country. Yesterday, this news made Hefei once again the focus. The Hefei Environmental Protection Bureau responded that this data is real-time data intercepting a monitoring station in Hefei. It is neither scientific nor accurate, and ranking is not reliable. However, the data from the Hefei City Environmental Monitoring Center indicated that the air quality in Hefei was indeed catastrophic and all the ten monitoring stations had serious pollution.

The reporter learned that the data of “Hefei” winning the “Worst Air Champion of the 74 Cities in China” came from a mobile phone monitoring software, which showed that the Hefei Air Quality Index was 478. “This sort is not referenced and cannot represent the true air quality of Hefei.” Hefei Environmental Protection Bureau official told reporters.

Yesterday afternoon, there were nine monitoring stations that showed serious pollution in Hefei. At 8 o'clock last night, the air quality index of Dongpu Reservoir sub station reached 304. At this point, all of the 10 sub-stations were “collapsed”, causing serious pollution. At this time, Sanlijiezi Station 422, Baohe District Station 408.

In addition, the real-time concentration of PM2.5 in the Baohe District sub-station once reached more than 500 yesterday, and the daily average limit of PM2.5 according to the new air quality standard is 75 micrograms per cubic meter. "A year after the implementation of the new standard, serious pollution will be a day, although the real-time value does not represent the daily average, but this situation is still rare today." Li Jing, deputy director of Hefei City Environmental Quality Monitoring Center Station told reporters yesterday.