Why is it so hot in summer and so cold in winter?

Because in winter, the altitude 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.

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

The Earth's orbit around the Sun is a nearly circular ellipse, and the Sun is located at a focal point of the elliptical orbit, so that the distance between the Sun and the Earth is constantly changing over the course of a year or even a day.

At the beginning of January every year, the Earth is at the perihelion of its orbit around the Sun, and the distance between the Sun and the Earth reaches a minimum value, which is about 100 million kilometers.

At the beginning of July every year, the Earth is located at the aphelion point of its orbit around the Sun, and the distance between the Sun and the Earth reaches its maximum value, which is about 100 million kilometers.

Compared with the average distance between the Sun and the Earth (100 million km), the difference in the distance between the Sun and the Earth in one year (100 million km) is almost negligible.

Therefore, the change in temperature over the course of a year has nothing to do with the distance between the sun and the earth.

The change in temperature over the course of a year is mainly related to the change in the angle of solar elevation.

In the northern hemisphere winter, the direct solar point is located in the southern hemisphere, the solar altitude angle in the northern hemisphere is small, the atmospheric path through which the same amount of solar radiation passes is relatively long, the solar radiation weakened by the atmosphere is more, and the solar radiation reaching the ground is relatively less. At the same time, due to the small solar altitude angle, the area of the same amount of solar radiation is large, and the ground per unit area receives less solar radiation. The temperature is relatively low.

In the summer of the Northern Hemisphere, the direct solar radiation point is located in the Northern Hemisphere, the solar altitude angle in the Northern Hemisphere is large, the atmospheric path through which the same amount of solar radiation passes is relatively short, the solar radiation weakened by the atmosphere is relatively small, and the solar radiation reaching the ground is more. At the same time, due to the large angle of solar altitude, the area of the same amount of solar radiation is small, and the ground per unit area obtains more solar radiation. The temperature is relatively high.

Also, in the northern hemisphere winter, when the days are shorter and the nights are longer, the caloric income is less and the expenditure is more. In the northern hemisphere summer, the longer the days and the shorter the nights, the more caloric income and the less expenditure.

In addition, in the northern hemisphere winter, a cold high pressure forms over the land, and the center of the high pressure continuously transports cold air masses to the low latitudes, which exacerbates the coldness.

The year is divided into four seasons: spring, summer, autumn and winter, and the cause of the four seasons, the distance of the earth from the sun, has little to do with the hot and cold climate. 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.

Zhuo Qing Forum.

When the sun moves to the southern hemisphere, the irradiation of the northern hemisphere is not sufficient, and the winter of our country is cold, and when it reaches the northern hemisphere, it is the summer of our country, and the sun shines sufficiently.

The Earth always revolves around the Sun at an angle. In summer, when the sun is concentrated on the ground, the weather becomes hot; In winter, the sun hits the ground obliquely, and the ground receives less sunlight than in summer, so the weather is cold.

The movement of the sun and the rotation of the earth are caused by the opposite of the seasons in the northern and southern hemispheres, and you can move with the movement of the sun, so you can choose whether it is cold or hot all year round.

In winter, the sun shines directly in the southern hemisphere, and in summer, the sun shines directly in the northern hemisphere, and we are in the northern hemisphere, so the sun has a large altitude angle in summer, so the distance from sunlight through the atmosphere to us is short, and the atmosphere is the main factor that weakens sunlight.

It is because the atmospheric balance of the climate is at work. In order to stabilize the temperature.

In winter, the sun is far away from the earth, and in summer, the sun is far from the earth.

This question deserves deep study! ~

You can ask God for details.

See if he knows.

Hehe..