Traditional Culture Encyclopedia - Weather inquiry - Air quality in Xianning, Hubei Province
Air quality in Xianning, Hubei Province
Air quality index (AQI) is a method to evaluate air quality. It evaluates the air quality according to the concentration of various pollutants in the air and gives the corresponding grades. The air quality is good when the air quality index is 77.
The air quality reflects the degree of air pollution, which 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 pollutant emissions from fixed and mobile pollution sources are one of the most important factors affecting air quality, including the tail gas of 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.
Climatic characteristics of Xianning
Xianning City is located in the northwest of Xianning City, which is a large area from Cha 'anling in chibi city to the north of Shuangxi in Xian 'an District.
Xianning city belongs to subtropical continental monsoon climate, with mild climate, abundant precipitation and sunshine, four distinct seasons and long frost-free period. In winter, northerly winds prevail, cold and dry; Southerly winds prevail in summer, with high temperature and rainy weather. The temperature is high, the amount of plum rains is abnormally high, the precipitation is obviously high, and the sunshine hours are abnormally low. Annual average temperature 17.7℃, extreme maximum temperature 38.4℃, extreme minimum temperature -6.2℃.
The average precipitation is 2 126.3mm, and the average annual sunshine time is 1400.7 hours. The main disastrous weather includes late spring cold, rainstorm, flood, flood, summer drought and summer drought.
Reference to the above content: Baidu Encyclopedia-Xianning City
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