Beijing air index

In 20231October 2 1 14: 00, the air quality index in Beijing was 126, with slight pollution.

According to the latest data reported by the Beijing Municipal Bureau of Ecology and Environment today, the air quality index this evening is 125-205, with light pollution in the northern area and moderate pollution in the six districts of the city and the south. During the daytime tomorrow, the air quality will be slightly to moderately polluted. 10 and 3 1 during the day, the air quality also remained slightly polluted.

The orange warning of heavy air pollution was launched in Beijing on June 54381October 30 12. In recent days, the weather in Beijing has been slightly better than the forecast, thanks to Beijing's timely emergency emission reduction and various measures, which have achieved the effect of "cutting peaks and slowing down" for several days.

On the first day of early warning, many departments in Beijing promptly informed enterprises to take differentiated emission reduction measures according to their performance levels and stop using off-road mobile machinery, and formed a 17 working group to conduct visits and inspections during the early warning period.

Beijing issued a new version of Emergency Plan for Heavy Air Pollution in Beijing (revised in 2023) on October 25th, 65438. In the face of higher air quality requirements, the new regulations have lowered the warning threshold.

Climatic characteristics of Beijing

Beijing's climate is a warm temperate semi-humid semi-arid monsoon climate, with high temperature and rainy summer, cold and dry winter and short spring and autumn. The frost-free period of the whole year is 180 ~ 200 days, which is shorter in the western mountainous area. In 2007, the average rainfall was 483.9 mm, which is one of the most rainy areas in North China.

The annual average solar radiation in Beijing is 1 12 ~ 136 kcal/cm. The two high-value areas are distributed in Yanqing basin and the northwest of Miyun county to the east of Huairou, with annual radiation above 135 kcal/cm. The low-value area is located near Xiayunling in Fangshan District, and the annual radiation is 1 12 kcal/cm.

The average annual sunshine hours in Beijing are between 2000 and 2800 hours. The maximum value is over 2800 hours in Yanqing County and Gubeikou, and the minimum value is distributed in Xiayunling and Rizhao for 2063 hours.

In summer rainy season, the sunshine hours are reduced, and the monthly sunshine hours are about 230 hours. Although the sunshine hours in autumn are not as much as those in spring, they are more than those in summer, with a monthly sunshine of 230-245 hours. Winter is the season with the least sunshine hours in a year, and the monthly sunshine hours are less than 200 hours, generally between 170 ~ 190 hours.

Reference to the above content: Baidu Encyclopedia-Beijing