How is the vortex formed? Thank you, everyone.

Cyclone is a kind of rotating air vortex, which flies into the air with dust carried by the ground. This vortex is what we usually see, and it is a natural phenomenon caused by air flow. The reason is that when the air flows around the uneven places such as trees, hills and buildings on the ground, or when the air collides with the ground, it must change its direction quickly, so it will produce a vortex that moves with the airflow, thus blowing a whirlwind. However, this kind of cyclone is very rare and very small. The main reason for the formation of cyclones is that when a place is very hot by the sun, the air here will expand and some air will be squeezed up. After reaching high altitude, the temperature will gradually decrease, start to flow around and finally sink to the ground. At this time, the air in the heated area decreases, and the air pressure also decreases, while the surrounding temperature is low and the air density is high. In addition, the heated air falls from the air, so the air increases and the air pressure increases significantly. In this way, air will flow from the places with high air pressure around to the places with low air pressure in the center, just like water flowing downwards. However, because the air flows on the earth, and the earth is constantly rotating from west to east, the air will be influenced by the rotation of the earth in the process of flowing, and gradually shift to the right (the original north wind is deflected into northeast wind, the south wind into southwest wind, the west wind into northwest wind, and the east wind into southeast wind). So the cold air blowing from all directions rotates around the heated low pressure area, becoming an air vortex opposite to the clockwise rotation direction of the clock, forming a whirlwind. In the center of this cyclone, due to the rising warm air and the continuous rotation of the surrounding air, it is easy to roll the dust, leaves and scraps of paper on the ground into the air and fly with the airflow. If the cyclone is very strong, sometimes some small animals on the ground, such as small snakes and bugs, will be swept into the air and gone with the wind in the dust. Generally, the height of a small cyclone is not too large. When it is rubbed by the ground or blocked by houses and trees, it gradually dissipates and becomes an ordinary wind. Some people may ask: because the ground is easy to produce cyclones when heated, it is hotter in summer than in spring. Why are there fewer cyclones in summer and more cyclones in spring? This is because although the weather is very hot in summer, the ground vegetation is green, the land is wet, and the temperature difference is not big, so there are few cyclones in summer. But in spring, the leaves haven't grown, the grass has just sprouted, the farmland is bare, there is no shelter everywhere, and it is easy to get hot, which makes the air temperature on the ground change greatly and it is easy to blow a whirlwind. Cyclones can fly into the air with dust and messy papers, and of course, they can also bring heat and water vapor from the ground to the air, so they cause vertical mixing of heat and water vapor in the air and make the vertical distribution of heat and water vapor even. The cyclone near the surface is very small, and the vertical exchange effect is not great, so a special microclimate is formed in the gas layer near the surface. In addition, strong tropical cyclones occurring in the southern hemisphere and the northern Indian Ocean are also called cyclones. Vortex airflow: In our daily life, we feel that the air around us is often in a state of fluctuation, which shows that the air has the characteristics of irregular movement. This kind of sports meteorology is called turbulence, which is also called turbulence and disturbed airflow. The formation of disturbed airflow can be divided into two types according to its nature: one is dynamic disturbance, and the other is thermal disturbance. One of the reasons for the formation of dynamic disturbance airflow is the fluctuation and vortex caused by the atmosphere encountering obstacles in the flow. The second is the vortex generated at the boundary of two adjacent gas layers with different wind speed and direction.