Scanning the landing plan
Your husband is with you
Successful landing
April is a month of heavy sand and dust storms。
Sand and dust are the best in the spring
According to statistics, our sand and dust weather occurs mainly in spring and winter, followed by autumn and the least in summer. The number of sand and dust weather events in the spring (march-may) was 77. 5 per cent of the year. Of these, the most frequent months of sand and dust weather are april, followed by march and may。
There's a lot of sandy weather
The classification is based primarily on the level of visibility at the time of the occurrence of sand and dust, with reference to the size of the wind, and the family is divided into five classes of floating dust, sanding, sandstorms, strong sandstorms, and particularly sandstorms。
Sandstorms can only be called sand and dust storms when the weather reaches a certain intensity. In meteorology, sand and dust weather can be divided into dust, sand and sand, sand and dust storms, strong sand and dust storms, and particularly sand and dust storms, depending on the impact。
The lightest degree of dust is the weather phenomenon where dust, fine sand, is evenly floating in the air, making the level less visible than 10 km。
In sandy weather, the wind blows up the ground dust, making the air quite obfuscated and visible at levels ranging from 1 km to 10 km。
When it reaches the level of dust and sandstorms, the wind blows up large amounts of sand and dust on the ground, making the air so dazzling and horizontal. Degrees
The strong sandstorm is the strong wind blowing up the earth's dust, the air is fuzzy, dazzling, and the level is visible. Degrees
And when the most horrific sand and dust storm emerges, the wind blows up the ground, the air is particularly dazzling and the level of visibility is less than 50 m。
It is a rare phenomenon in which sand and dust storms, commonly known as “black storms”, or “black winds”, reach maximum intensity. When the “black storm” occurred, it was almost zero in visibility and was a disastrous weather mixed with strong winds and dense sand and dust. Its life history is short, usually from time to time less than 12h。
“the black storm is prone to occur in deserts and semi-desert areas, and is concentrated in spring and summer, when it comes to ad hoc rolls of sand and dust, stretches out with no finger and destroys and burys near objects and fine fields.” black storm not only directly leads to excessive loss of nutrients in the soil, but also pollutes air quality and is extremely damaging to the natural environment。
The main hazards of black storms are wind, sand and wind: wind damage and ground erosion。
Level three! A picture of a sandstorm warning
In accordance with the existing national early warning release standards, sand and dust storms issued by the central weather service are classified into three levels: sand and dust storm blue, yellow, orange, and light-to-deep, representing increasing levels of impact and defence。
Studies have shown a marked downward trend in sand and dust weather in our country since 1961. From the year-to-year distribution of sand and dust processes since 2000, there has been a downward trend in sand and dust in recent years。
Analysis of the causes of dust and sand
The formation of sand and dust storms requires three basic conditions, the abundant source of sand and dust being its material condition, the large wind being its dynamic condition, and the unstable state of atmospheric condensation being an important local thermal condition. Spring is the most intense season of warmer air throughout the year and the highest temperature in the day after noon, making it easier to destabilize atmospheric formations. So it's easier to have sandstorms in spring afternoon。
Natural conditions
The favourable sand, distribution of dust sources and favourable air instability are the main causes of dust and sand storms or strong dust and dust storms, which are conducive to the creation of wind or wind. Strong winds are the driving force of sand and dust storms, and sand and dust sources are the material basis of sand and dust storms, and unstable heat conditions are conducive to greater wind power and to the development of strong currents, thus bringing more sand and dust and increasing it。
In addition to this, early drought, low rainfall, warmer weather and rising temperatures are the special weather contexts in which sand and dust storms are formed; the development of fluent uniforms in front of the surface into clouds or rays is a small- and medium-scale system that facilitates the development and strengthening of sand and dust storms; and the presence of a narrow tube, which is conducive to wind growth。
Physical factors
Under very favourable large-scale environments, high-altitude dry cold currents and strong vertical wind speeds, wind-directional cuttings and heat unstable layers, the generation and development of small- and medium-scale systems in the vicinity of the hot zone have increased the air pressure, temperature gradients, both before and after the sharp zone, and have created large pressure gradients around the sharp zone. A combination of kinetic downflow and gradient differential winds results in a steep rise in the near-surface wind speed, lifting up the surface dust, creating sand and dust storms or strong sand and dust storms。
3. Environmental factors
Soil wind erosion is the primary link in the development of dust and sand storms. Wind is the most direct driver of the soil, with the most important factors, such as the nature of the current, the speed of the wind, and the associated conditions for wind activity during soil wind erosion. The water content of the soil is also one of the important causes of wind erosion in the soil。
Plants usually influence wind erosion in three forms: spreading a certain amount of wind momentum on the ground, reducing the flow of air and dust; and stopping the movement of soil, sand and dust。
4. Meteorological factors
The formation of sand and dust storms is closely related to the winter wind in east asia, which occurs mainly in the semi-winter mongolia-siberian high-pressure-driven cold-dry sand and dust storms。
5. Man-made factors
Man-made overgrazing, deforestation of forest cover, construction of industrial or industrial transport, in particular, over-cultivation, destruction of ground vegetation, disturbance of surface structures and the formation of large areas of deserted land have directly accelerated the formation and development of sand and dust storms。
Our sand and dust spatial distribution
From 1991 to 2020, the distribution of the number of sand and dust storm days in our country (see figure below) was mainly affected by the prevailing sand and dust weather in the northern part of the country, where the southern basin and the western part of the interior of mongolia were high-growth sand and dust storms, with the number of sand and dust storm days per year exceeding >10 days and parts of >20 days。
The seven provinces of xinjiang, qinghai, gansu, ningxia, the midwest of inner mongolia, shaan north and jinxi are also more common in sandstorm weather, which is also the most affected area of the country. In addition to this, sand and dust storms can be seen in north china, huang huai and north east。
Our sand and dust weather processes have generally shown a marked downward trend since this century, but they remain high in the north between march and may each year。
The benefits of sand and dust storms
Clean up the air and mitigate acid rain
Aerosols formed by sand and dust contain high calcium content and can absorb harmful substances such as nitrogen oxides and sulphur oxides in industrial soot and car tail gas during landing and purify air。
The rich alkaline positive ion in sand dust can be effective in neutralizing acid rain and reducing its adverse effects on productive life。
In japan, for example, when snow falls in dusty weather, it is possible to cause “black snow” (actually brown) and yellow snow. This yellow dust relieves acid rain in japan. According to studies, acid rain with ph less than 5. 6 in most of japan, sometimes even below 4. 5, disappears whenever such dusty weather occurs。
It helps marine life grow
The smaller the dust particles, the longer they fly in the sky, the deeper they can even fly to the sea, where they contain iron and phosphorus, which are essential to marine life and are often lacking in sea water, and contribute to the growth of marine life and the conservation of biodiversity。
If both marine life and seawater lack iron and phosphorus, biodiversity is threatened and the entire marine ecosystem is likely to change。
It's good for the rain
It has been observed that dust particles are condensed on the surface and are highly conducive to water vapour condensation。
Overall, sand and dust storms have more harm than good。
The elderly, children, pregnant women, people suffering from respiratory and cardiovascular diseases are sensitive people, and sand and dust should be avoided as far as possible, and medical attention should be provided as soon as possible in the event of chronic cough and cough or short-temperature, asthma and chest pain。
From "the earthman looks at the world" public
Part of the text is taken from "china weather network, high school geography research, china weather data."
Introduction
It is located at 918 new zone, located across the corner of the chaos teachers training college, and was established in 2012 with an office space of more than 1,800 square metres. Over a period of nine years, it has developed and consolidated a large number of outstanding teachers throughout the country. It has built up a reputation in a number of projects, such as civil servants, institutions, teachers, three first aid jobs, special posts in guizhou, academic advancements and vocational training. The quality of the teaching is too hard, the quality of service management is high and the market occupancy rate is high. In 2018, it was set up and achieved excellent results. In 2019, it set up a teaching centre in guizhou and sowe. The official has been working to develop a brand of excellence in the training industry, with the aim of “unity and cohesion, efficiency, success and success, innovation, and excellence”。
Public education
Civil service
The teacher is on three sets
Military civilian teacher qualification
Vocational training for educational advancement
It's a mess
If you want to go to school, it'll take years
Some people say they did it without a review, and we do it around, but it's only a few, and it's only they know. Some people are willing to spend a lot of money looking after their friends, but they cannot afford to invest in their own knowledge. Based on the experience of many participants, a solid foundation is needed to achieve good results. Don't give your destiny to luck. If you want to get on duty, you'll be able to do it, not close the door, make the car, but find your own group! A young partner who learns together can't be separated from his own efforts if he's on shore, he's on the soy sauce. If you want to play with soy sauce, don't take it. Why waste that time, money? In particular, the employment situation has become more critical in recent years, with students graduating in june/july each year as the most difficult employment season, and the job fairs for students attending school are like dumplings. Work is becoming more difficult to find, and more and more people are looking for iron jobs. In the same vein, as long as they study hard, they will not be able to take the test。
The people told you
The reason for choosing us
From a high-quality environment, get your passive mind into learning。
The best learning position for adults is not to learn alone, but to learn in circumstances, and effective learning is to enter relevant situations and find its own “learning community”
Regular teaching staff, full-time teaching of well-known in-service teachers
Civil education has a stable teaching team, a strong teaching staff, a number of teachers who have taught the yunnan province civil servants, departments and special teachers the techniques of solving problems and solving problems, helping students to develop the skills of efficient and time-efficient methods and solving problems。
Trainees will be provided with a class master
The head of the class is accompanied throughout the pre-screening process, regularly issues study assignments, checks on the performance of the work, and develops an exclusive learning plan based on the actual situation of the trainees, supervises the learning process and follows up on the completion of their assignments。
Each model course director provides guidance and advice on the basis of the student examination, including on the standard and fast filling of flashcards, the integration and optimization of problem sequences, the timing of questions and the improvement of efficiency. Some of the topics are discussed among the course directors, who organize discussions with each other to enhance the effectiveness of their learning. Each of our tests is conducted according to strict criteria。
Classes, modeling pictures
Matching of the candidates for the job
Not only is the examination good, but it also needs to be well reported. The school district is equipped with a computer. Teachers will be able to present their results on the basis of the number of places they have taken up in previous years, the number of applicants will be analysed, and in the light of the latest developments in the relevant civil service positions, they will be helped to recommend the most suitable job. It's important to have both "good" and "good" examinations. "to be able to select the most suitable and relatively small jobs in combination."
Distribution of accompanying learning materials
Over time, in stages, taking into account the student's own situation, we have a full-time teacher who has tailored learning programmes for the student and has steadily improved learning achievement
Before each session, pupils are given instructional materials for this section。
Teaching materials
Helping students solve all their life problems, including accommodation
A life teacher is available throughout the course to ensure both safety and supervision of students' studies, quality of learning, and friendship among students, and a return to three years of age! During the course of the training, participants are given adequate and timely solutions to any life problems, such as accommodation, creating a quiet and comfortable learning environment for the participants, and are fully committed to preparing for the examination。
We'll organize a group of teachers and students together
To sharpen your commitment, enhance your self-confidence in learning, and build on the quality of team support, not just our classmates, but also our team, where you can meet many like-minded friends, work together and work together。
Mission activities
Accommodation for students
In addition to learning, healthy living habits, quality accommodation is essential to be successful. If a dormitory is playing every day, i don't believe that you can take it seriously, and if everyone in a dormitory is taking it seriously, i don't believe that you can go and play peacefully. It is therefore provided free of charge to each student, who is able to take up a one-time job only in order to reassure you。
