What are the climatic characteristics of the autumn equinox, and do you know what are the actual cha

In fact, the weather is relatively cold, and it will rain often, which will also cause many people to catch a cold.

Characteristics of the autumnal equinox:

The autumn equinox, the sixteenth of the 24 solar terms in the lunar calendar, is generally on September 22 and 24 of the Gregorian calendar every year. The climate in the south begins with this solar term before autumn. Features include:

1. At the north and south poles, on the day of the autumnal equinox, the sun is on the horizon all day long. After that, as the direct point of the sun continued to move southward, a six-month polar night began near the North Pole, and the range gradually expanded and then decreased. A six-month period of polar day begins near the South Pole, gradually expanding and shrinking.

2. The temperature difference between day and night will gradually increase, and the amplitude will be higher than 10; The temperature is dropping day by day, getting colder day by day, and gradually entering the deep autumn season. The situation in the southern hemisphere is reversed.

At the time of the autumn equinox, most parts of our country have entered the cool autumn, and the cold air from the south meets the warm and humid air that gradually decays, producing precipitation again and again, and the temperature also drops again and again. As is often said, it is time for "one autumn rain and one cold", but the daily precipitation after the autumn equinox will not be very large. At this time, the fields in the north and south were different.

Autumnal equinox climatic characteristics:

At the time of the autumn equinox, most parts of our country have entered the cool autumn, and the cold air from the south meets the warm and humid air that gradually decays, producing precipitation again and again, and the temperature also drops again and again. As is often said, it is time for "one autumn rain and one cold", but the daily precipitation after the autumn equinox will not be very large. At this time, the fields in the north and south were different.

In North China, there is an agricultural proverb that says: "The white dew is early, the cold dew is late, and the autumn equinox is the right time to plant wheat." "The proverb clearly states when the winter wheat will be sown in the region; And "the autumn equinox weather is full of white clouds, and there are good songs and good rice cultivation everywhere" reflects the time of sowing rice in the Jiangnan area.

In addition, the taboo of the working people on the autumn equinox solar term is also summarized into proverbs, such as "the autumn equinox is only afraid of thunder and lightning, how expensive is the price of rice".

And so on. The days are getting longer and longer from the winter solstice in the northern hemisphere, but the days are longer than the nights from the vernal equinox; From the day of the summer solstice, the days get shorter and shorter, but from the autumnal equinox the days are shorter than the nights.

Reason: On the winter solstice, the sun shines directly on the Tropic of Capricorn, and the days are shortest in the northern hemisphere, and then the direct sun begins to move north, and the days are getting longer and longer in various parts of the northern hemisphere. After the vernal equinox, the direct point of the sun moves to the Northern Hemisphere, where the days begin to be longer than the night.

On the summer solstice, the sun shines directly on the Tropic of Capricorn, and the days are longest in the Northern Hemisphere, and then the direct sun begins to move south, and the days are getting shorter and shorter in the Northern Hemisphere. After the autumnal equinox, the direct point of the sun moves to the Southern Hemisphere, and the Northern Hemisphere begins to have shorter days than nights.

The autumn equinox is one of the 24 solar terms, and the autumn equinox solar terms are generally high and crisp in autumn, and the temperature difference between morning and evening will be larger. After the autumnal equinox, the weather gradually cools.

1. The autumn equinox, the bucket finger, is the first round of the "24 solar terms" type 16 solar terms. The festival falls on September 22-24 in the Gregorian calendar, when the sun reaches 180 degrees of ecliptic longitude. On the day of the autumnal equinox, the day and night are equal, and the longer the night, the shorter the day.

After the autumnal equinox, the direct point of the sun continues to move from the equator to the southern hemisphere, and the days and nights begin to be shorter and longer in the northern hemisphere, that is, the days begin to be shorter than the nights in a day. The Southern Hemisphere is the opposite.

2. At the autumn equinox, the day and night are evenly divided in most parts of the earth, each 12 hours; Near the North and South Poles, the Sun can be observed on the horizon all day. After the autumnal equinox, the days are shorter and the nights are longer in the northern hemisphere, and the days are longer and the nights are shorter in the southern hemisphere. The "fen" in "autumn equinox" means "half".

"Equinox" shows the meaning of day and night equinox, the same as the spring equinox, the sun directly hits the earth's equator on this day, and Tong Tang guesses the equinox of day and night.

3. Weather: During the autumn equinox, most parts of China have entered the cool autumn, and the cold air from the south meets the warm and humid air that gradually decays, producing precipitation again and again, and the temperature also drops again and again. As is often said, it is time for "one autumn rain and one cold", but the daily precipitation after the autumn equinox will not be very large.

At this time, the fields in the north and south were different.