How are the seasons formed? What are the reasons for the formation of the four seasons

Look up the Earth's orbit (running around the sun). The sun's illumination of the earth varies from south to north and then from north to south every year. China is located in the northern hemisphere, when the sunlight crosses the equator to the southern hemisphere, autumn and winter come; Spring and summer come when sunlight crosses the equator from the Southern Hemisphere back to the Northern Hemisphere.

The rotation of the earth produces the distinction between day and night, and the rotation of the earth produces the changes of the four seasons of spring, summer, autumn and winter.

The fundamental reason for the change of seasons is that the Earth's axis of rotation is not perpendicular to the plane of its orbit, and the angle of deviation is 23 degrees 26 minutes (yellow-red angle). Depending on the season, the northern and southern hemispheres receive unequal sunlight, with the sunshine being more in summer and the other half in winter.

Causes of the Formation of the Four Seasons The formation of the four seasons is the result of the Earth's revolution around the Sun. The Earth is constantly rotating from west to east while revolving around the Sun. And the orbit of the Earth's revolution is a voice coil, and the sun is gathering all the time.

In the process of the earth's continuous rotation, the angle of intersection of the earth's axis and the orbit will always be maintained, which means that the earth is always tilted. Because of the revolution of the earth, the direct point of the earth changes on the surface of the earth. Every year around June 22, the Earth is at aphelion.

The sun will shoot directly at the Tropic of Cancer, which is the summer solstice in the Northern Hemisphere. At the same time, the Northern Hemisphere receives the most heat, with the longest days and a hot climate. This northern hemisphere is in the summer, and the southern hemisphere is in the midst of a cold winter.

After that, as the orbit continues to rotate, the direct point of the sun will shift to the southern hemisphere, and around September 23, the sun will shoot directly at the equator, and the northern and southern hemispheres will receive the same amount of solar heat, day and night will coincide, autumn is autumn, and spring is spring in the southern hemisphere. This day is the day of the vernal equinox in the Northern Hemisphere. This is spring in the Northern Hemisphere and autumn in the Southern Hemisphere.

The earth is like a cycle that revolves around the sun, and the seasons change.

The rotation of the earth and the tilt of the earth's axis have caused a variety of natural climatic environments on the earth (including the change of seasons, which is only one of them).

Due to the tilt of the Earth's axis, the direct point of the Sun is not on the equator for most of the year, and as a result of the rotation, the direct point of the Sun moves periodically between the Tropic of Capricorn throughout the year. As shown in the figure below: (using the Northern Hemisphere as a benchmark).

At the same time, the earth is an approximate sphere, and the uneven heating and the geostrophic deflection force caused by the rotation of the earth lead to the generation of different wind belts, and the joint action of the revolution produces a variety of climatic environments.

The seasons of the year are formed by the Earth's orbit around the sun.

The four seasons refer to the four seasons that alternate in a year, namely spring, summer, autumn, and winter, with three months each. The four seasons of the year are formed because the earth revolves around the sun. Due to the existence of the yellow-red angle, the annual variation of the direct sun point moving back and forth between the north and south latitudes of the earth is 23°26, which causes the change of the height of the sun at noon and the change of the length of day and night, forming the change of seasons.

The commonly used methods for dividing the seasons mainly include the "solar term method" and the "temperature method". Traditionally, the "four stands" (the beginning of spring, the beginning of summer, the beginning of autumn, and the beginning of winter) of the "24 solar terms" are used as the beginning of spring, summer, autumn, and winter. Modern scholar Zhang Baokun proposed a new seasonal standard, which is to wait for the average temperature (the average temperature of 5 consecutive days) to fall steadily below 10 as the beginning of winter, and to rise steadily above 22 as the beginning of summer. The average temperature between 10 and 22 is spring or autumn.

Introduction to the Four Seasons

1. Spring. Spring is the first of the four seasons, and a new cycle begins. Spring represents warmth and growth. In spring, the yin and yang qi begins to change, and all things sprout and grow with the rise of yang energy, and spring is the season for all things to grow, spring ploughing and sowing, and the so-called "plan of the year lies in spring".

2. Summer. Summer is the season when crops are in full bloom. The temperature rises, the weather is hot, the storms are frequent, and everything grows. Summer is the most stormy season in spring, often accompanied by strong winds and torrential rains.

3. Autumn. Autumn is the harvest season, which means that everything begins to grow from luxuriant to mature. The first two solar terms of autumn are the beginning of autumn, the heat of the summer, or the hot weather, because the heat brought by the sun has not weakened, the so-called "heat in the dog days", the dog days appear between the heat and the heat, it is the highest temperature of the year and humid and sultry days.

4. Winter. In winter, yin and yang change, all things are received and hidden, and plants are angry and closed. After entering the beginning of winter, it means that the dry climate with little rain in autumn gradually passes, and the winter climate characteristics are cloudy and cold. The Sun in the Northern Hemisphere has a small altitude and short daylight hours.

The above content refers to Encyclopedia - Four Seasons.

The Earth's revolution produces seasonal changes.

Because the earth is inclined to rotate around the sun, the direct sunlight of the sun is centered on the equator, and the Tropic of Cancer is the boundary of the Tropic of Capricorn, sweeping north and south, once a year, and the cycle continues, thus forming the four seasons on the earth.

Vernal equinox: On March 21, the sun moves from south to north to the equator, equinoxes day and night.

Summer solstice: On June 22, the direct point of the sun moves north to the Tropic of Capricorn, and the Northern Hemisphere has the longest day.

Autumnal Equinox Day: On September 23, the direct point of the sun moves from north to south to the equator, and the world equinoxes day and night.

Winter solstice: On December 22, the direct point of the sun moves south to the Tropic of Capricorn, and the days are the most intense and long in the southern hemisphere.

The Earth's revolution produces seasonal changes.

Because the earth is inclined to rotate around the sun, the direct sunlight is centered on the equator, and the Tropic of Cancer is the boundary of the north and south sweeping.

Vernal equinox: On March 21, the direct point of the sun moves from south to north to the equator, and the global equinox of day and night.

Summer solstice: On June 22, the direct point of the sun moves north to the Tropic of Cancer, and the northern hemisphere has the longest day.

Autumnal Equinox Day Tour: On September 23, the direct point of the sun moves from north to south to the equator, and the global equinox of day and night.

Winter solstice: On December 22, the direct point of the sun moves south to the Tropic of Capricorn, and the southern hemisphere has the longest day.