Traditional Culture Encyclopedia - Weather forecast - What wind level can effectively blow away smog?
What wind level can effectively blow away smog?
In Beijing, the most important thing is not the wind, but the wind direction. Greenpeace made a good analysis and looked at the influence of wind direction on PM2.5. When the wind direction is different, does PM 2.5 rise or fall? The result is this: it can be seen that when the northerly wind blows to the far left, PM 2.5 will decrease. As soon as the south wind blows, PM 2.5 rises. So when watching the weather forecast, let's pray for the north wind! In Shanghai, the situation is slightly different. To the north, east and southeast of Shanghai is the sea: the Pacific Ocean will not produce air pollution, so when the north wind and the east wind blow, PM 2.5 will decrease. However, there are many pollution sources in Jiangsu and Zhejiang provinces to the west of Shanghai, so when the west wind blows, the PM 2.5 in Shanghai will rise: the ordinate is the possibility that the PM 2.5 in Shanghai will exceed 150 micrograms. You can see on the right, when the west wind blows, it is more likely. When the north wind and the east wind blow (on the left), the possibility is even lower. On June 6 13, the air quality in the cities under the jurisdiction of our province was between mild pollution and severe pollution, with mild to moderate haze. On June 5438+07, with the increase of cold air wind, the atmospheric diffusion conditions improved and there was no smog in the province. Experts from the Provincial Meteorological Observatory said that on June 5438+06, due to the combined influence of cold air regional pollution transportation and local pollution superposition, the atmospheric diffusion conditions were poor, and the province generally encountered "smog". This state will improve from 17. It is predicted that the whole province will be cloudy on 17, and the northwest wind will be about 4. The lowest temperature in Huaibei is -3 ~-4℃, with freezing, 0 ~ 1℃ in southern Jiangsu and-1℃ in other areas, and the highest temperature is 5 ~ 6℃ in the north between Jianghuai and 7 ~ 8℃ in other areas. 18, the whole province is cloudy to sunny, and the temperature hovers between -2℃ ~ 1 1℃. On June 5438+09, the whole province was sunny to cloudy, and the temperature was -2℃ ~ 8℃. This weekend, it didn't rain, but at the turn of March 9th and April 9th, the temperature was not high. Please keep warm when you go out.
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