Shanghai Air Quality Monthly Report in September, 2023: According to the Ambient Air Quality Standard (GB3095-20 12), in September, 2023, the excellent and good rate of air quality in Shanghai was 77.4%, and the air quality was generally good; Exceeding the standard for 7 days, the primary pollutant is O3, and there are no days of serious pollution.

The average monthly concentrations of PM2.5, PM 10, SO2 and NO2 are 18 μ g/m3 respectively. 29 μ g/m3? 6 μ g/m3? 20 μ g/m3? The daily average of the 95th percentile of CO is 0.7mg/m? The average value of the 90th percentile of the maximum 8 hours on O3 day is 176 μ g/m3? .

Compared with the same period of last year (the excellent and good rate of air quality AQI was 64.5%), the excellent and good rate of air quality AQI increased by 12.9 percentage points; The monthly average concentrations of PM2.5 and PM 10 decreased by 18.2% and 14.7% respectively, the monthly average concentration of SO2 increased by 50.0%, the monthly average concentration of NO2 remained flat, the daily average 95th percentile of CO decreased by 12.5%, and the daily average 90th percentile of O3 decreased by/kloc.

Compared with last month, the excellent rate of air quality AQI increased by 0.7 percentage points; The monthly average concentrations of PM2.5, PM 10, SO2 and NO2 decreased by 30.8%, 14.7%, 14.3% and 20.0%, respectively. The daily average of CO decreased by 12.5%, and the maximum average of O3 was 900th in 8 hours. In September 2023, the average monthly concentration of PM 10 mobile monitoring on roads in this city was 66 μ g/m3? .

Climatic characteristics of Shanghai:

Shanghai has a subtropical monsoon climate with four distinct seasons, abundant sunshine and rainfall. The climate in Shanghai is mild and humid, with shorter spring and autumn, longer winter and summer, and the average annual temperature is about 16℃. The frost-free period of the whole year is about 230 days, and the average annual rainfall is about 1200mm. But 60% of the rainfall in a year is concentrated in the flood season from May to September, and there are three rainy seasons in the flood season: spring rain, plum rain and autumn rain.

The climate in Shanghai is characterized by distinct seasons throughout the year. Winter and summer are long, and spring and autumn are short. It is about 126 days in winter, 1 10 days in summer and 130 days in spring and autumn.

Shanghai has a subtropical maritime monsoon climate, with an annual average temperature of about 65438 06℃, the highest in July and August, and a monthly average temperature of about 28℃. 1 the lowest, about 4℃ per month. The annual precipitation is about 1 100 mm, and there is no cold in winter and no heat in summer. You can travel all year round, and spring and summer are the best tourist seasons.

Reference to the above content: Baidu Encyclopedia-Shanghai