论文部分内容阅读
秋冬之际,天空常被笼罩住一片灰蒙蒙中。雾霾是城市上空悬浮着的粉尘等颗粒物,由于风的水平流动减少,使污染物横向稀释能力差,空气质量下降;另外,如果空气水平流通不畅,城市上空会存在一个逆温层,这种垂直方向的逆温现象,也导致了污染物滞留在低空尤法释放出去。雾霾天气主要对皮肤和呼吸系统影响比较大,空气中的微小颗粒容易“干扰”人体的免疫系统,加重呼吸道感染,尤其是呼吸道疾病患者会感觉胸闷、呼吸困难:由于空气流通差,空气中污染物和有害物质增加,一些病原体
Autumn and winter, the sky often enveloped in a gray. Haze is dust and other particles suspended in the city. Due to the reduction of the horizontal flow of the wind, the lateral dilution ability of the pollutants is poor and the air quality declines. In addition, if the air circulation is not smooth, there will be an inversion layer over the city, Inverted vertical temperature phenomenon, also led to the retention of pollutants in the low especially released. Smog and haze mainly affect the skin and respiratory system, the tiny particles in the air easily “disturb” the body’s immune system, aggravating respiratory tract infections, especially in patients with respiratory diseases will feel chest tightness, difficulty breathing: due to poor air circulation, Airborne pollutants and harmful substances increase, some pathogens