November 3, the Ministry of Environmental Protection issued a warning of heavy pollution in Beijing, Tianjin and Hebei, until the day of November 6, heavy pollution did not arrive on schedule. In this regard, experts said emergency control measures in advance to put the emission intensity Lowering is the key to the success of the heavy pollution weather emergency; heavy pollution occurs later than predicted, indicating that the measures taken to reduce emissions have played a certain effect.
The Ministry of Environmental Protection issued a warning on 3 November Beijing-Tianjin-Hebei heavy pollution does not seem to have arrived, even if it had been the most polluted pollution on the day of November 6, Beijing's sky is blue sky .A number of atmospheric experts explained Said that the haze is weak, not forecast is not allowed, but the emergency emission reduction measures work.
Wang Zifa, a researcher at the Institute of Atmospheric Physics of the Chinese Academy of Sciences, said that the pollution process in the Beijing-Tianjin-Hebei region and the surrounding areas mainly resulted from the accumulation, transfer and secondary conversion of pollutant emissions under the conditions of continued southerly winds and the deterioration of atmospheric diffusion conditions Wang Zi-fa explained that based on past experience, the air quality conditions at the time of the deterioration of the atmospheric diffusion conditions often determine the peak concentration and duration of the pollution process.Prevention measures are taken to reduce the emission intensity before the accumulation of pollution Going forward is the key to the success of heavy polluted weather emergency.Research conducted by a number of research institutes shows that emergency mitigation measures taken 1 to 2 days in advance can effectively reduce the peak PM2.5 concentration and postpone the heavy pollution Time for the pollution process, early warning information issued in advance around the timely preparation and start emergency measures to reduce emissions, it is in order to early prevention and control, protect the general public's health.
According to Chai Fa-he, a researcher at the Chinese Academy of Environmental Sciences, heavy-polluted weather warnings are made by local governments based on the forecasts and forecasts of national and local air quality forecast agencies and scientifically decided and released to the community. The forecast results are based on routine pollutant emissions Which is obtained through a variety of air quality prediction models combined with meteorological data.The actual air quality status of the people is the result of local governments have taken emergency measures to reduce emissions.
In the view of Chai Fa-hsien, the real air quality felt by the public is better than predicted or heavy pollution occurs later than predicted, indicating that the measures taken to reduce emissions have played a certain effect.
However, Chai Fa He also said that due to the industrial structure and energy structure of Beijing-Tianjin-Hebei region and its surrounding areas, the discharge of pollutants in the region remains huge. Emergency emission reduction can only reduce the impact of heavy pollution to a certain extent.
Chai Fa He gave details of the compulsory emergency response and emission reduction. The "2 + 26" cities in Beijing-Tianjin-Hebei region and the surrounding areas adopted regional emergency coordination measures including steel, cement, casting, furniture, mining and other industries Limited production, the country III and below the motor vehicle limit line, the key enterprises shifting peak transportation, construction and traffic control and dust control.At the same time, this year around the heavily polluted weather contingency plans significantly increased the number of controlled enterprises, compaction abatement measures, basically do The total number of enterprises involved in gas.The total number of regional control enterprises increased from nearly 10,000 last year to about 50,000 this year.Preliminary analysis of 2 +26 cities in the orange warning period, the proportion of major pollutants emission reduction at 20% , Which effectively suppressed the rapid increase of PM2.5 concentration in Beijing, Tianjin and Hebei during the pollution.
During the multi-start of the Beijing-Tianjin-Hebei heavy orange warning, the MEP dispatched 28 inspection teams and 102 inspection teams to inspect a total of 1,085 enterprises and found that only 32 enterprises failed to implement the contingency plans and the implementation rate was as high as 97%. He said that this shows that all localities attach great importance to heavy-polluted weather response work, and pay close attention to the implementation of emission reduction measures.It is precisely because of such a good implementation, making the impact of this heavily polluted weather process reduced a lot, the peak pollution concentration than predicted Low, duration is also relatively short.