source: the Ji'nan times
more and more high-rise buildings, floating dust levitation layer has attracted much attention. Reporter Sun Hua
is the floating dust belt is concentrated in the high building 10 floors height? Why is my family old people living in the 10 floor, the window of asthma will aggravate, in the 3 building is better? Ms. Zhang in a high-rise residential near Daming Lake, a high-rise house bought two houses, encountered similar phenomenon after the heart suspicious sinus. In recent days, reporters visited several high-rise residential buildings and consulted experts, and learned that there was indeed a floating dust suspended layer.
Ms. Zhang said that three years ago, she bought two apartments on the 20 storey residential building, one on the 10 floor and the old man living in the 3 floor. Ms. Zhang found that after a long window in summer, the elderly suffering from asthma will increase. "Once, I cleaned the old man's house and found that the air outside the window was obviously cloudy than that on the 3 floor. After observing for a week, I can basically conclude that the air outside the 10 building windows is worse than the 3 windows. After exchanging the house with the old man this summer, the old man's asthma did not worsen.
13 at 2 p.m., the reporter came to Ms. Zhang's residence, and observed 3 and 10 floors, feeling that the air on the 10 floor was slightly heavier. "It's just raining today, and the air is better," she said. "When it comes to cloudy or dusty weather for a long time, it will be more obvious." Ms. Zhang also introduced a method to observe the floating dust. At night, with the flashlight beam pointing out of the window, the floating dust in the light column would be seen more clearly.
on the evening of 14, on the Second Ring Road, the reporter visited three high-rise buildings and illuminated with a flashlight column. It was found that the floating dust outside the windows of the 9, the 10 and 11 floors was relatively more than the other floors.
15, the reporter interviewed the atmospheric research experts of Shandong University and Municipal Environmental Protection Bureau. According to relevant experts, the air from 25 meters to 35 meters from the ground will form a floating zone, from the angle of the building between 8 and 12 layers, and the 9 to 11 floors are heavily affected floors. Experts introduce that the specific conditions of floating dust layer are not consistent, the biggest factor that affects the suspension layer is the weather, for example, the suspension layer will disappear temporarily in the rainy day, and the suspended layer will continue to move in the wind weather. In the case of small wind and clear weather, there will be a relatively stable suspension layer. The suspended layer is also related to the topography. Generally speaking, the suspended layer is relatively low in the high topography, while the low suspended area is relatively high. In addition, the dust suspended layer of large cities or industrial cities is heavy, small cities or leisure cities are lighter, and the floating dust layer in rural mountainous areas is less.