Who can talk about atmospheric circulation processes

The basis of atmospheric circulation is the global imbalance in the amount of solar radiation received by the surface due to the equatorial region.

The air rises in the equatorial region (equatorial low pressure zone) and sinks in the polar region (polar high pressure), due to the compensating effect of air, the upper air flows from the equator to the poles and the lower layer flows from the poles to the equator, if there is no geostrophic deflection force.

This creates a simple atmospheric circulation of the equator and the poles. But the Earth rotates.

It is bound to produce geostrophic deflection force, and the air is inevitably affected by it in the flow, and the air flowing to the poles at high altitude is constantly shifting in the direction during the movement, and finally at 30° north and south latitude

The westward flow of air blocks the movement of the upper-air current, causing the upper-air air to gather here and force it to sink (the subtropical high-pressure belt, where the sinking air reaches the ground and divides into two branches, one flows towards the equator, and under the action of geostrophic deflection force, the northern hemisphere becomes the northeasterly wind (northeast trade wind belt), and the southern hemisphere.

It becomes a southeasterly wind (southeast trade wind belt), while the other flows geographically towards the polar regions, with southwesterly winds in the northern hemisphere (southwest westerly wind belt) and northwest winds in the southern hemisphere (northwest westerly wind belt). Because the air flow to the polar region is relatively warm and humid from the low latitudes, it encounters a cold air flow from the polar region near 60°N.N. latitude, and it rises to form a polar front (subpolar low pressure belt), and the uplifted air is also divided into two branches after reaching the upper altitude, one flows southward into the upper layer of the subtropical high, and the other continues to flow northward to supplement the upper layer of the polar high pressure reduced by sinking, and the air sinking from the polar high flows to the low latitude, which is also affected by the geostrophic deflection force, and the northeast wind is formed in the northern hemisphere, in the Southern Hemisphere, is the southeast wind (polar easterly wind), which creates what we commonly call a three-circle circulation.

A micro-lesson on the formation process of thermodynamic circulation.

Atmospheric circulation is the atmospheric movement of a global system (atmospheric movement involves thermal circulation and wind).

It mainly includes: one and three circles of circulation. The result of the combined effect of uneven surface solar radiation and geostrophic deflection forces.

2. Monsoon circulation. It is mainly caused by the difference in thermal properties between land and sea. In South Asia and Southeast Asia, the southwest monsoon is also deflected to the right by the southeastern monsoon of the southern hemisphere in summer.

Third, the urban heat island circulation, the city has many people, the industry is generally hotter than the suburbs, so the formation of low pressure, near the ground wind from the suburbs to the city, the high altitude is the opposite.

Fourth, the valley wind. During the day, the top of the mountain is heated up and the air pressure is lowered, and the wind blows from the valley along the slope to the summit, and the summit returns the air from the valley to the valley floor. At night, the summit cools down and the pressure is high, and the wind blows from the summit along the slope to the valley, and the updraft from the valley returns to the summit.

5. Water and land breeze. During the day, the land heats up and the air pressure is low, and the wind blows from the land to the water, and the air flow over the land blows to the water. At night, the land cools down quickly and the air pressure is high, the wind blows from the land to the water, and the air flow over the land blows to the water.

Atmospheric circulation refers to a large-scale atmospheric phenomenon with a world scale. It includes both the average state and the instantaneous phenomenon, and its horizontal co-bond scale is more than thousands of kilometers, the vertical scale is more than 10 km, and the time scale is more than a few days, and it is also a state of large-scale movement of the atmosphere. The average state of atmospheric movement in a large area (such as Eurasia, hemisphere, and the whole world), the average state of atmospheric movement in a long period of time (such as month, season, year, and multi-year) or the change process of atmospheric movement in a certain period of time (such as a week, during the rainy season) can be called atmospheric circulation.

Atmospheric circulation generally refers to a world-scale, large-scale atmospheric operation phenomenon, including both average state and instantaneous phenomenon, with a horizontal scale of more than thousands of kilometers, a vertical scale of more than 10 kilometers, and a time scale of more than several days.

Atmospheric circulation is related to temperature and climate, the air rises in the place where the temperature is high, the air pressure decreases, the air sinks in the place where the temperature is low to form high pressure, and the high altitude forms a low pressure in the here and now, and then the high air pressure goes to the low air pressure, such as the equatorial low pressure with the air pressure rises, and the subtropical high pressure with the air falls, so that in the high school it is called like the equator to flow to both sides, and at low altitude it is to flow to the equator on both sides.