Suqian air quality

In 2022, the number of excellent days of ambient air in the city will reach 280, and the proportion of excellent days will be 76.7%; The concentrations of PM2.5, PM 10 and NO2 in the air decreased year-on-year, with average concentrations of 37 μ g/m3, 6 1 μ g/m3 and 23 μ g/m3, respectively, down by 2.6%, 7.6% and 8% year-on-year. The index concentration of sulfur dioxide is 6 μ g/m3, which is the same as last year.

The concentrations of O3 and CO increased year-on-year, and the concentrations were 169 μ g/m3 and 1 mg/m3, which increased by 7.6% and11%respectively. Among them, O3, as the primary pollutant, exceeded the standard for 49 days, accounting for 57.6% of the total days exceeding the standard, which became the main index affecting the ambient air quality in the city.

The days with excellent air quality in Shuyang, Siyang and Sihong counties were 290, 293 and 292 days respectively, and the proportion of excellent days was 79.5%, 80.3% and 80% respectively. The annual average pH value of precipitation in the whole city is 7. 17, with a range of 6.54-8.2. Compared with 202 1, the pH value of rainwater is stable and there is no acid rain.

Climatic characteristics

Suqian belongs to warm temperate monsoon climate zone, with annual average temperature 14.2℃, annual average precipitation 9 10 mm and annual average sunshine hours 229 1 hour. Superior light and heat resources, distinct seasons and mild climate. The total solar radiation is about 1 17 kcal/cm2, and the annual sunshine number is 227 1 hour.

The frost-free period is long, averaging 2 1 1 day, the first frost period is generally in late June 10, the first snowfall day is generally in mid-February 189℃, and the annual crop growth period is 3 10.5 days. The annual average precipitation is 892.3mm, which has little interannual change due to the influence of monsoon, but the precipitation distribution is uneven, which is easy to form spring drought, summer waterlogging and dry weather in autumn and winter.

Reference to the above content: Baidu Encyclopedia-Suqian City