Why is it so cold? Why is it so cold.

Cold air activity on Earth is the direct cause of cooler weather.

At the same time, because the Earth revolves around the Sun, these parts of the Northern Hemisphere become cooler when the direct point of the Sun moves south. Also in the southern hemisphere of the Earth, these places in the southern hemisphere become cooler when the direct point of the sun moves north. It is not the reason why the Earth's revolution turns to perihelion and aphelion.

The Eurasian continent in the Northern Hemisphere is greatly affected by the warm westerly winds of the North Atlantic in winter, and when the warm westerly winds of the North Atlantic are stable, they can block the cold air from the polar regions from moving southward, thereby weakening the cold wave. But this year's La Niña event has upset the stability of the warm westerly winds in the North Atlantic.

La Niña is a phenomenon in which the southeast trade wind blows away the hot sea water near the equator, causing the lower cold sea water to turn up, and the air pressure to become higher, making the subtropical high pressure in the northern hemisphere stronger, blocking the warm westerly wind from the North Atlantic Ocean to the Eurasian continent, so as to facilitate the continuous southward movement of cold air from the polar regions.

Why is it cold in winter and hot in summer? Some people may think that we are far away from the sun in winter, and the opposite in summer, but in fact, this idea is completely wrong, the earth revolves around the sun is an ellipse close to a perfect circle, the closest date to the earth is in early January, and the farthest distance is in early July, that is to say, it is precisely when we are closest to the earth that it is the coldest season in the northern hemisphere, which also shows that in the process of the earth orbiting the sun, the distance of the earth from the sun is not a factor that determines the temperature or cold. The correct explanation is this:

The four seasons are formed mainly because the equator and the ecliptic (the path through which the sun travels as seen on Earth) are obliquely intersected. When the Earth moves, the direction of its axis in space does not change. In winter, the sun's rays are obliquely on the ground, and the heating per unit area on the ground is less, and the days are short, and the daily sunlight is short, that is, the heating time is short, and then because of the atmosphere around the earth, it absorbs a part of the light and heat, and when the light is irradiated, the thicker the atmosphere, the more it absorbs, so it causes cold in winter.

In summer, on the other hand, the sun hits the ground directly, the days are long, and the light passes through the atmosphere and is thin, so the climate is hot. The spring and autumn rainy seasons are between winter and summer, so the climate is mild. It is because in winter, the height angle of the sun is smaller, the sunlight is obliquely shining on the earth, the energy density of the sun reaching the earth is smaller, and the earth gets less energy from the sun, so the winter is cold; And in summer, the height angle of the sun is large, the sunlight is almost direct to the earth, the energy density of the sun reaching the earth is very large, and the earth gets more energy from the sun, so the summer is hot.

Because the Earth's orbit around the Sun is an ellipse, in winter, our Earth is closer to the Sun; In the summer, our earth is far from the sun.

After the winter solstice is the real winter, when I was a child, I always heard the elders in the family say that the number nine, that is, from this day the weather will get colder and colder, and then there will be a small cold and a big cold, to ninety-nine eighty-one days after the slow warming, spring flowers, on this day there will also be the custom of eating dumplings and glutinous rice balls, the wind is relatively strong in the first two days, the temperature of these two days is about minus 10 degrees, the weather is cooling, or pay more attention to adding clothes.

2020 is coming to an end, and I hope that the last day will take away all the epidemic viruses and bad things to welcome the health, peace, and joy of 2021, and then everyone can have a happy year of reunion.

The change in temperature is mainly affected by the height of the sun at noon and the length of day and night.

The change of winter and summer is caused by the existence of the yellow-red intersection angle, and the change of the two elements at different times during the earth's revolution.

Different latitudes, even in the same hemisphere, with different heights of the sun at the same time, the temperature is of course different.

But in winter, the temperature in our country is much lower than that of Western Europe at the same latitude, mainly due to:

1. Differences between land and sea. The temperature difference between winter and summer is low in the ocean due to the slow heat absorption and heat release.

2. Siberia, which is covered by ice and snow (reflecting sunlight and reducing ground absorption), forms an extremely low temperature zone, and the "cold air" blown by it seriously affects the winter temperature in China. We can see that the temperature has warmed up after the cold air.

The main reason is that this year's southwest warm and humid airflow from the Bay of Bengal is very strong, this strong southwest warm and humid airflow from the Bay of Bengal carries a large amount of water vapor, enters China, and then advances strongly along the eastern and northern directions, sweeping through most of China, and reaching the Yangtze River Estuary basin unimpeded. At the same time, the strong cold air from the north of the Ural Mountains in Siberia has also successfully reached the northern part of South China and the south of the Yangtze River.

It's definitely about people's physical fitness! Nowadays, people lack exercise, and the body's ability to withstand stress has become weaker. In addition, it has something to do with extreme climate change, but I think the main reason is related to people's willpower and physical fitness!

The main reason is that the strong cold air from the north has continued to move south in the near future, causing a large area of rain and snow across the country, making the temperature in most parts of the country 2 3 degrees lower than normal. So it makes people feel very cold.

Two reasons. One is that the earth is far away from the sun in winter. (The Earth's orbit around the Sun is elliptical, so it is far or near the Sun).

Second, the sunshine hours are short in winter.

These two reasons lead to cold winters.

In addition, winter is the period of the year when the solar altitude angle at noon is the smallest and the day is shortest; Summer, on the other hand, is the time of year when the sun has the highest altitude angle at noon and the longest day.

The weather is closely related to atmospheric circulation, direct sunlight angle, latitude, etc. When the cold air mass is overwhelming, the temperature will plummet, and the human body will naturally feel cold.

Due to the recent period, the cold air activity is frequent, and wave after wave hits, causing the temperature to drop rapidly, and the weather is very cold.

The warm and humid airflow is extremely active, and it frequently intersects with cold air, resulting in a long period of rainy and snowy weather, a serious lack of sunshine, and serious heat loss. The temperature dropped significantly.

The Earth may be entering the next glacial age, when the melting of the Arctic Ocean causes desalination and disrupts the thermohaline cycle of the world's oceans.

Today's cold weather is mainly influenced by the La Niña phenomenon, which has led to abnormal weather and snowstorms.

It's normal for the weather to be cold, and the world's climate naturally changes, but now that the global climate is warming, it's not cold.

According to climate experts, this year's winter will be earlier than in previous years, and this cold winter phenomenon is likely to continue into 2025 and reach a peak in 2025. If that's the case, then this year's winter will not only be a cold winter, but it will also last longer, in fact, if you think about it from another angle, there is nothing wrong with this, and others will not be able to see my belly in thick clothes

The temperature has dropped, and it is a natural phenomenon, so please be careful to prevent the cold.

Hope to give good reviews. Thank you!

The Earth revolves, with aphelion and perihelion, and is now at perihelion, plus the arrival of cold air from Siberia.

Because it's a north wind, and the sun isn't mainly shining on this side!!

It's winter, and the humidity is high, so there's a lot of pollution.

Because it's winter, winter is the coldest time of the year.

Because winter is coming, it's a natural law.

One is that the weather is cold in winter.

The second is that you feel cold.

Drink plenty of hot water when it's cold and eat hot meals on time.

Prevent colds.

Because there's a cold wind blowing.

The air currents are moving, and the cold winds are coming from high to low.

Because winter is coming. Spring is near.

That's what winter feels like, icy and biting. If you feel cold, talk about a vigorous love, love makes everything warm.

It's winter, so it's so cold.

There is a reason why the weather is cold, our earth revolves around the sun and moon, and at a certain point it will be cold.

It's winter, and when will it be cold if it's not cold in winter?

It's the winter solstice, and of course it's cold.

It's winter, of course it's cold, but it's not normal if it's not cold.

Is it cold, I eat ice cream at home with half sleeves.

Because some pests have to freeze to death, in order to ensure better growth of crops. According to the law of natural variation, you are not uneducated in geography, and the direct point of the sun in the winter half of the year is in the southern hemisphere. And....Think for yourself! Hey.

The greater the difference between the temperature of the body and the outside world: the colder it feels This is the case when you have a cold.

The direct cause of the colder weather is the reduction in sunshine.

From the end of summer to the beginning of the sun's movement towards the southern hemisphere, by the winter solstice the sun is on the tropic of cancer in the southern hemisphere.

For the Northern Hemisphere, the sun is oblique, and the amount of solar energy in the Northern Hemisphere is greatly reduced, so it will get colder and colder, and for the areas where we live, because the heat from the sun is less, we will not be able to resist the cold air from the Arctic region to the south, so it will be very cold.

Because it's in the north, because it's winter, big brothers. It is said that the severity is related to the trajectory of the sun.