Why is ozone pollution hitting again? Status of ozone pollution

From June 4, the weather in North China and Huanghuai will be sunny and hot. It is expected that the high temperature weather will continue on June 5 and 6, and there will be 35 38 high temperatures in the central and southern parts of North China and the northern part of Huanghuai, and the local temperature can reach 40. Under the scorching sun, ozone pollution has once again become an important factor affecting ambient air quality.

According to the results of the national air quality forecast consultation in mid to early June announced by the Ministry of Ecology and Environment, light to moderate ozone pollution may occur in most cities in Beijing-Tianjin-Hebei, most of Shandong and some cities in northern Henan due to persistent high temperatures and near-surface southerly winds. In addition, in the Northeast, Yangtze River Delta, South China, Southwest China, and Northwest China, ozone is also the primary pollutant.

According to the just-released "2017 Communiqué on the State of China's Ecological Environment", in 2017, the average concentration of ozone in the ambient air of 338 cities in China was 149 micrograms, an increase from 2015. From 2015 to 2017, the proportion of days exceeding the standard with ozone as the primary pollutant in 338 cities was

4%, which is increasing year by year. From January to April 2018, the average ozone concentrations in 338 cities were microgram cubic meters, showing a month-by-month increasing trend.

Liu Zhiquan, director of the Department of Environmental Monitoring of the Ministry of Ecology and Environment, said, "China's ozone pollution presents continuous and regional pollution characteristics, mainly concentrated in central and southern Liaoning, Beijing-Tianjin-Hebei and its surroundings, the Yangtze River Delta, Wuhan urban agglomeration, Shaanxi Guanzhong region, Chengdu-Chongqing and Pearl River Delta regions." Liu Zhiquan also said that China's ozone pollution is mainly mild, and there has been no serious pollution, let alone a "burst of the table".

The amount of volatile organic compounds is large and wide, not only in industry, but also in living sources, including decoration coatings, catering, etc.

How can individuals protect themselves from ozone attacks?

There is no need to be alarmed about a slight ozone exceedance. Ozone pollution generally occurs in the hottest hours of the day, and it is best to reduce going out and ventilating the room less often. Once you go out, sensitive people can wear hats, sunglasses and other protective products.

1. The current situation and characteristics of ozone pollution in Zhuzhou City were analyzed by using the automatic air quality monitoring data in January and December 2013. The results showed that during the monitoring period, the annual exceedance rate of the maximum 8-hour average concentration of ozone attack was only the standard, and the standard value of one beat of burning pants reached the standard rate.

2. The monthly variation of the maximum 8-hour average concentration of ozone per day was m-shaped, and the high concentration value lasted for a long time. The daily variation pattern in the middle of the period was strong, and the variation law of the four seasons was slightly different.