Air Quality in Suzhou City, Anhui Province
The quality of air = reflects the degree of air pollution and is judged according to the concentration of pollutants in the air. Air pollution is a complex phenomenon. At a specific time and place, the concentration of air pollutants is affected by many factors.
Man-made pollutants emitted by stationary and mobile pollution sources are one of the most important factors affecting air quality, including tail gas from cars, ships and planes, industrial pollution, heating of residents' lives, garbage incineration and so on. Urban development density, topography and meteorology are also important factors affecting air quality.
In addition, the concentration of "negative oxygen ions" is also one of the signs of air quality. According to the standards of the World Health Organization, when the concentration of negative oxygen ions in the air is higher than per cubic centimeter 1000- 1500, it can be called "fresh air".
Climatic characteristics:
Suzhou is located in the transition zone between warm temperate zone and north subtropical zone, and belongs to warm temperate zone and semi-humid monsoon climate zone in China climate division. The main climatic characteristics are: four distinct seasons, the same season of rain and heat, abundant sunshine, moderate rainfall and long frost-free period. Suzhou is short in winter, Changchun and autumn, generally less than 2 months, with summer110-15 days and winter 137 days. The climate in Suzhou is suitable for the growth of many crops, fruit trees and trees, and the climate characteristics of rain and heat in the same season provide good conditions for agricultural production.
However, Suzhou is located in the transitional zone between north and south, and is influenced by the two major water systems of Huanghuai and the climate of land and sea. Cold and warm air meet frequently, and the weather changes dramatically. Climate has a great influence on agricultural production. Natural disasters such as drought, flood, gale, hail, continuous rain, low temperature frost, pests and diseases often occur, which have a great influence on industrial and agricultural production and people's daily life.
The above contents refer to Baidu Encyclopedia-Air Quality Baidu Encyclopedia-Suzhou City.