The atmosphere is thinner in the winter half of the year How to describe the air in winter

The title of this question should be: the tropospheric atmosphere is thinner in the winter half of the year.

Of all the layers of the Earth's atmosphere, only the troposphere of the atmosphere undergoes a noticeable change in thickness in different seasons.

In summer, the troposphere is thicker due to the expansion of the atmosphere due to heat and expansion due to high near-surface temperatures, and in winter, due to low near-surface temperatures, the atmosphere shrinks and sinks in response to cold, and the troposphere is thinner.

There is a downdraft for more than half a year in winter. It's not like the summer half of the year. So the atmosphere is thinner.

I guess it's the knowledge of thermodynamic circulation. In summer, the temperature is high and the airflow rises. Temperatures are low in winter. The air flow sinks.

It's very simple, because there is less solar radiation in winter than in summer, so the temperature drops, because the atmosphere expands and shrinks, so the atmosphere becomes thinner than in summer, and the upstairs is not correct, you know, not everywhere is the air flow rises in the summer, and the air flow sinks in the winter. Look at the diagram of the thermosphere The earth has: the equatorial low pressure zone, the subtropical high pressure zone, the subpolar low pressure zone, the polar high pressure zone In the low pressure zone, the air flow is sinking, and the air flow in the high pressure belt makes the air sink Because the direct sun point moves back with the north-south movement of the season, so the pressure belt will also move relative to the north and south. You know?

What was said upstairs was not right. China is affected by the Mongolian high pressure, which is 1000 Pa higher than the atmospheric pressure in summer. If, as upstairs says, how does the northwest wind blow in winter?

Winters are dry, and the moisture content of the air is not as high as in summer. It depends on the humidity of the day. In summer, the air renews quickly.

On the one hand, run, example sentence: this moist winter day, diffused with lazy water molecules, in this pure world, they quietly embrace, how much they want to touch, kiss such a natural elf, I also hope for gifts, luxury for precipitating my long-term self-confident heart.

On the other hand, Rin, example sentence: It's lonely cold air again, scattered like arrows, full of anger, full of roars, as if they are receiving orders, go quickly, go and kill those cowardly humans

Low temperature and low humidity (low water vapor content).

The climate of the tropical rainforest is controlled by the equatorial depression all year round, with prevailing updrafts and convective rain, and the temperature is high in the equatorial region. Therefore, it is high temperature and rainy throughout the year, regardless of winter and summer.

。。。Actually, I'm just here to mark it...

The air is thin in the summer. Water vapor evaporates and air mixes together.

The higher the temperature, the less dense the gas... So the air is thin in the summer.

It depends on the current temperature of the road surface and whether the temperature is rising or falling.

If the weather is in a warming phase, it is usually warmer. If the weather is cooling, the temperature will be lower.

Broadly speaking, when the climate starts to get colder, the air is colder than the road surface. If it is cold for a long time, the air and the road surface will reach an equilibrium point, and the temperature will be basically the same. If the climate starts to warm, the road surface is colder than the air.

In a narrow sense, if the meteorological conditions do not change rapidly in winter, the temperature difference between day and night is large, and the road surface is colder than the air during the day and colder than the road surface at night.

It's okay in winter, the air is not so exaggerated, and you don't need to wear a mask, just like usual, but the heating burns more in winter, and there will be slightly more suspended particles in the air, which is generally fine. For the two schools you said, I think it should depend on what major you are studying, can not be a general evaluation, each school has its own characteristics, I feel that Jiaotong University is good, last year was ranked in China's top ten universities with the most potential, not much to say, you go to see it, I hope you live and study happily in Lanzhou!

In fact, the winter market in Lanzhou is very good.

I live in an apartment opposite Lanzhou Jiaotong University.

On the whole, your choice should be better.

Winter is just a little bit colder.

There should be nothing wrong with the city.

In the winter of Lanzhou, the air is dry, the pollution is not as exaggerated as the legend, and most industrial cities are similar, there is no need to do pollution protection, pay attention to moisturizing.

Lanzhou is located in the river valley basin, there is no wind in winter, the air is really bad, generally sulfide and inhalable particles exceed the standard, but there is no need to do any special protection, just wear a mask. Lanzhou Jiaotong University is the original Railway College, Lanzhou Institute of Technology is the original Gansu University of Technology, are not a good school, in comparison, Gansu University is slightly stronger.

Lanzhou is okay in winter, but it's too dry. Jiaotong University is in Anning, and there are more universities over there. It's better to play, the surrounding environment of the Polytechnic campus is not too good, but I think the two schools are about the same.