Expert interpretation: "Super long standby" at high temperature weather, the risk of ozone pollution continues

In the past few days, Chengdu's "high fever" has not retreated. As of 10:00 on August 17, Chengdu issued 7 days of high temperature red warning for 7 days, and the entire Chengdu became "red oil pot bottom". Among them, Jianyang and other east areas are even more red It became a "spicy pot".

Fierce sunshine just like Chengdu? of course not. Looking at the whole country, since August, the extremely powerful and long -lasting subtropical high -pressure "shrouded" over the Yangtze River Basin in my country, blocking the southwest monsoon, forming two high -temperature centers in the southwest and the Yangtze River Delta. The entire Yangtze River Basin is "hot". Since August 12, the Central Meteorological Observatory has been warning for 7 days of high -temperature red warnings, and the temperature in eastern Sichuan and other places has soared "40 ° C" or higher. This high temperature breakthrough is conventional, and in terms of strength, breadth, and durability, it is the most advanced to history.

Affected by the violent high temperature, most of the cities under the control of the auxiliary high have occurred in ozone pollution, especially the two high -temperature centers in the Yangtze River Delta region and the southwestern region. Among them, Shanghai and Hangzhou in the Yangtze River Delta increased by 6 days and 5 days of oxygen pollution. Although the Sichuan Basin in the southwestern region of my country, although it continued to carry out regional collaborative emission reduction and launched early warning, there were also 11 cities in ozone pollution in ozone pollution. Essence

How close the relationship between abnormal high temperature weather and long -term continuous ozone pollution risks is close. Today (17th), Zhang Yuanhang, the leader of the "one city, one policy" residence follow -up research working group in Chengdu, The process of rotation pollution was interpreted.

Academician Zhang Yuanhang pointed out that since the "Thirteenth Five -Year Plan", Chengdu has carried out the analysis of the source of ozone pollution mechanism and the source of ozone pollution mechanism (nitrogen oxide and volatile organic) through high standards of construction of atmospheric research key laboratories in Chengdu. Summer ozone pollution prevention and control operations continue to deepen regional joint prevention and control, and take the lead in the country to introduce measures such as ozone heavy pollution weather emergency plans to achieve the increase in ozone concentration significantly lower than the Fenwei Plain, Beijing -Tianjin -Hebei, Yangtze River Delta and other areas. The situation is basically contained. However, according to the results of the "one city, one policy" working group's research on Chengdu and other cities in China, Chengdu wants to achieve no ozone pollution sky, and the pre -ozone body material needs to be reduced by 70%-80%.

As a large city, Chengdu is currently at a high level of ozone before the economic development. From the endowment of the atmospheric environment capacity, the Chengdu Plain in the bottom of the "big bowl" of the Sichuan Basin, the weather diffusion conditions are inherently poor. Although it is not nearly 45 ° C in the middle and lower reaches of the Yangtze River, Chengdu is prone to various types of pollutants. Gathering is difficult to spread. When encountering extreme high -temperature weather, although vigorously carried out the control of various types of pollution sources, the emergency reduction displacement after the yellow warning was started due to the temporary reduction displacement caused by high temperature power restrictions. Ozone pollutes the sky.

In the face of the ozone pollution process since August, what did Chengdu do? How is the effect?

According to the pre -judgment of the meteorological department, starting in early August, 11 cities, including Chengdu, including Chengdu, have continuous ozone pollution risks, and there are moderate or severe pollution risks. Chengdu launched the yellow warning of ozone heavy pollution weather at 00:00 on August 3. This is the first ozone warning launched after the release of ozone heavy pollution weather for ozone heavy pollution weather this year. The implementation of the new plan has a significant effect on the prevention and control of ozone pollution: During the early warning period, through the city's work and active participation in the whole society, as of August 14, the city has successfully won 3 excellent days, which effectively avoids the moderate and the whole region and the moderate and the whole region and the situation. The occurrence of local severe pollution, the peak of the ozone concentration is also effectively controlled. For an intuitive example, when similar unfavorable weather conditions appeared in July 2017, two moderate pollution days and 1 weight pollution sky appeared in Chengdu.

What is the effect of ozone pollution? What measures can the public take health protection and participate in ozone prevention and control?

Ozone pollution has a strong confusion. It often occurs when it is sunny and cloudless. It is difficult to detect and even give people the illusion of "good weather". When ozone pollution comes, we do n’t have to talk about color changes. The impact of ozone pollution is more effectively on plants and buildings in nature. For human health, as long as related protective measures are taken, we do n’t need to worry too much. For example: During the high temperature afternoon, it is best to reduce going out and outdoor activities. Sensitive people need to protect them, standardize masks, and wear hats, sunglasses and other protective products. Usually, physical exercise should be increased in moderation, improved physical fitness, and enhanced immunity, and can appropriately reduce the damage of ozone on the upper respiratory tract.

In addition, reduce the use of private cars, travel as green as possible, and go out in time when parking, and avoid refueling during high temperature hours, etc. It is an effective measure to participate in the prevention and control of ozone pollution from the majority of our citizens and to participate in ozone pollution prevention and control. In these respects, our citizens' friends in Chengdu have a very good say. According to statistics, in the survey of people created by civilized cities across the country, the awareness of Chengdu citizens is relatively high about the topic of "implementing green and low -carbon lifestyle".

How long does such a hot weather last? When can the risk of ozone pollution be lifted?

According to the latest air quality, the result of the service results, the subtropical high pressure will be maintained in the next 10, and the high temperature weather will continue until the 24th. Among them, there will be local convection weather around 18 days. Ozone pollution in the central urban area will remain for a while.

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