Why is the convection strong when the temperature is high, and what is the reason why the temperatur

Because the density of air with a high temperature is less than that of air with a lower temperature, the higher the temperature, the less dense it is. For the same volume of air, if the temperature is higher and the density is smaller, the greater the upward resultant force on it. Because the volume does not change, the buoyancy does not change, and the smaller the density, the smaller the gravity, so the upward resultant force is greater.

And the higher the temperature, the smaller the air density, so the higher the temperature, the greater the upward resultant external force of the air, so the greater the combined external force, the greater the acceleration, and the upward velocity increases, will the convection not be obvious? On the other hand, cold air at high altitudes will sink due to the same theory, and the reason is the same.

Sunlight is mainly concentrated in the visible and ultraviolet light segments, and ultraviolet rays are basically absorbed by ozone in the upper atmosphere. So the main thing that can hit the ground is visible light. Ground air (mainly carbon dioxide) mainly absorbs infrared rays, and the frequency of infrared rays is smaller than that of visible light, so when visible light passes through the air in the troposphere, the air basically does not absorb it.

The visible light incident on the ground is absorbed by the ground, and any object higher than absolute 0 degrees will emit electromagnetic waves outward, so after the ground absorbs visible light, it will heat up, but the temperature is still very small relative to the temperature of the sun, so the ground will emit the infrared band in the electromagnetic wave, which is the band absorbed by carbon dioxide. Therefore, the main heat of the troposphere is the ground, so it is natural to conclude that the higher the troposphere is above the ground, the lower the temperature. The main heat in the upper atmosphere** is the Sun, which is the opposite of the troposphere, and the higher above the ground, the higher the temperature.

Severe convective weather occurs when two different clouds come together, and warm and cold air come together, so severe convective weather is formed.

It is also because the air is affected by high winds, so the strong convective weather that we see will also be affected by some temperature, air pressure and air.

Convective weather refers to disaster weather that occurs with short-term rainfall, tornadoes and hail. It occurs in convective cloud systems and is meteorologically a small- and medium-scale weather system.

The first is that the air is relatively strong, and there is a vertical movement, and then the temperature rises more severely, and then a lot of radiation is released, and then the atmosphere heats up, and then it expands when it comes into contact with the temperature of the earth's surface.

Due to the high summer temperatures and the unstable climate, convection occurs between the clouds and the air is affected by vertical movements.

Because the ground temperature will rise during the day, it will also produce some short-wave radiation, which may lead to a change in air density, which will affect the situation of the atmosphere, and finally lead to atmospheric instability and strong convective weather.

Because of the air pressure, there are certain conditions for this to happen, and this situation usually occurs at night.

During the day, the ground absorbs the short-wave radiation emitted by the sun, the temperature rises, and the long-wave radiation is emitted to heat the atmosphere. Severe convective weather refers to the convective gales accompanied by thunderstorm phenomena (hail, short-term heavy precipitation (20mm h), which is one of the disastrous weather with major lethality, the reason for the formation of strong convective weather is that the ground continuously absorbs the short-wave radiation emitted by the sun during the day, the temperature rises, and the long-wave radiation is released to heat the atmosphere, and the hotter air near the ground rises under the action of buoyancy, and forms a rising hot and humid air flow. When rising to a certain height, the water vapor contained in the air condenses into water droplets due to the drop in temperature.

When the water droplets fall, they are carried up by the stronger updraft, and so on and so forth, until the water droplets begin to accumulate into large droplets, until the high air flow is unable to support its weight, and finally it falls into rain. Weather refers to the specific state of the atmosphere in a certain area close to the earth's surface in a short period of time. Weather phenomena refer to various natural phenomena that occur in the atmosphere, that is, the comprehensive performance of the spatial distribution of various meteorological elements (such as temperature, air pressure, humidity, wind, clouds, fog, rain, flash, snow, frost, thunder, hail, haze, etc.) in the atmosphere in a certain instant.

1) Temperature decreases with altitude: Since the troposphere mainly gets heat from the ground, the air temperature decreases with altitude. The perennial snow cover in the high mountains, and the clouds in the high altitude are mostly composed of ice crystals, which is a clear manifestation of this characteristic.

2) Vertical convective motion: due to the uneven heating of the ground surface, vertical convective motion is generated. The intensity of convective motion varies mainly with latitude and seasonality.

The general situation is: the low latitudes are stronger, the high latitudes are weaker: stronger in summer, weaker in winter.

As a result, the thickness of the troposphere decreases from the equator to the poles.

3) The horizontal distribution of meteorological elements is uneven: because the troposphere is greatly affected by the surface, and the surface of the earth has differences between sea and land, and the terrain is undulating, so the horizontal distribution of temperature and humidity in the troposphere is uneven.