What are the manifestations of dusty weather (floating dust, sand blowing and sandstorm) that often occurs in northern China, especially in northern China?

The main reason is the cold air source that affects China, that is, the cold high pressure and south pressure at high latitudes in the northern hemisphere this year, which significantly increases the cold air that affects the middle latitudes and the wind speed accumulated through Asian dust sources, leading to these dust weather.

Dust is difficult to eradicate fundamentally. First, China has deserts with an area of 1.7 million square kilometers, and there are sand sources such as Mongolia abroad. Another condition is that there is strong wind, and sandstorms are bound to happen. Sandstorms cannot be eradicated, but we can still do some work in front of them:

The first is to strengthen forecasting and early warning. Our country now attaches great importance to and supports this work. According to the requirements of the sandstorm response plan, all departments are responsible. The State Forestry Administration is responsible for taking the lead in this work. At present, the State Forestry Administration strengthens cooperation with meteorological departments, and conducts annual sandstorm weather trend consultation and forecasting and early warning, providing decision-making basis for the CPC Central Committee, the State Council and relevant departments, providing suggestions for local governments and departments at all levels, and guiding disaster prevention and emergency work.

Second, forestry, meteorology and other departments have established some sandstorm monitoring stations, which can provide information at any time and provide a basis for disaster relief guidance. In addition, the forestry department has also established a mobile phone short message publishing platform. We have more than 100 information officers in the place where sandstorms occur frequently, that is, the origin of sandstorms. He immediately sent me the number, situation and temperature of this Nanjing Road. According to the forecast and early warning of the Meteorological Bureau, I made preparations for emergency and disaster prevention and mitigation, including the monitoring of sandstorms discovered by meteorological satellites and their possible impacts.

In addition, it is necessary to strengthen the popularization of science to the public. We have produced some popular science pamphlets and distributed them to the people in Uygur, Mongolian and other minority languages. For example, there was a strong sandstorm in Aksu last year, and the publicity materials we sent were very popular to let the people know how to deal with the sandstorm. We can also reduce the dust hazard by building farmland forest network. Especially in a local area, afforestation has the following important functions. First, it can effectively reduce the wind speed. The results show that the general wind can reduce 40%-50% after passing through the forest network, and some strong winds can even reduce 60%, which is to effectively reduce the harm of dust to farmland. The other is that we increase forest and grass vegetation and some mechanical treatments, such as sand barriers, increase surface vegetation and increase surface roughness, thus inhibiting the formation of sandstorms; The third function is to reduce the source of dust. Through our management in recent years, the dust has decreased after increasing forest and grass vegetation. If a strong sandstorm passes through instead of bare land, the supplementary sand source will be reduced.