What is the difference between beginning of autumn and the autumnal equinox?
1, different times
Beginning of autumn: Every year on August 7th or 8th of Gregorian calendar, the sun will revolve to the position of 135.
Autumnal Equinox: Every year from September 22nd to 24th in Gregorian calendar, the sun is located at the Yellow Meridian 180.
2. Different meanings
Beginning of autumn: beginning of autumn is the first solar term in autumn. Autumn marks the official start of early autumn.
Autumnal equinox: The autumnal equinox is the fourth solar term in autumn. After the autumnal equinox solar terms, most parts of China have entered late autumn.
The climate is different.
Beginning of autumn: The dog days in beginning of autumn. At this time, the temperature is high and unbearable, and the temperature is similar to that in summer. After beginning of autumn, the "autumn tiger" appeared, and the weather was still very hot.
Autumnal Equinox: At the time of the autumnal equinox, it is already a good season for late autumn, crisp autumn, golden breeze and sweet osmanthus fragrance. There is a saying called "an autumn rain and a cold", which refers to the autumnal equinox solar terms.
4. Different positions
Beginning of autumn: beginning of autumn is the 13 solar term among the 24 traditional solar terms in China. During the solar term in beginning of autumn, the phoenix tree leaves began to turn yellow and wither, so there is a saying that "the phoenix tree leaves fall, and the world knows autumn".
Autumnal equinox: The autumnal equinox is the16th solar term among the 24 traditional solar terms in China. The autumnal equinox is the 30th day of autumn. At the autumnal equinox, day and night are divided equally, each accounting for 12 hour. There is no extreme day and night in the world.
What does beginning of autumn and the Equinox mean?
The autumnal equinox is the16th solar term among the 24 solar terms of the lunar calendar, usually on September 22nd or 23rd every year. The climate in the south began to decline from this solar term. First, the sun reaches 180 degrees on this day, pointing directly at the equator of the earth, so a day is divided into 24 hours, each 12 hours; There is no extreme day and night phenomenon in the world. After the autumnal equinox, the polar night range near the North Pole and the polar sun range near the South Pole gradually expanded.
Beginning of autumn is the 13 solar term among the 24 solar terms, and beginning of autumn is on the 7th, 8th or 9th of August every year. "Autumn" means that summer is cool, which means the beginning of autumn. When you arrive in beginning of autumn, the plane tree will definitely begin to shed its leaves, which is why there is an idiom "When you lose a leaf, you will know autumn". Literally, the word "autumn" consists of "valley" and "fire", indicating the maturity of five grains. Beginning of autumn is the first solar term in autumn, and autumn is a transitional season from hot to cold, and then from cold to cold.
There are four stops in a year-beginning of spring, Changsha, beginning of autumn and beginning of winter, which means the beginning of a season.
There is a "dichotomy"-"vernal equinox" and "autumn equinox", which can be understood as cutting a year in half. That is, on the day of "vernal equinox" or "autumn equinox" every year, day and night are the same length.
Characteristics of autumnal equinox
In the autumn equinox, most parts of China have entered a cool autumn. The cold air from the south meets the gradually decaying warm and humid air, which causes repeated precipitation and the temperature drops again and again. As people often say, it's time for "an autumn rain and a cold", but the daily precipitation after the autumnal equinox will not be great. At this time, the field farming in the south and the north is different.
In northern China, there is an agricultural proverb that says: "The white dew is early, the cold dew is late, and it is the right time to plant wheat in the autumn equinox." Proverbs clearly stipulate the sowing time of winter wheat in this area; And "White clouds come in autumn equinox, good songs and good rice seeds are everywhere" reflects the planting time of rice in Jiangnan area. In addition, the working people's taboos on the autumnal equinox solar terms are also summarized as proverbs, such as "The autumnal equinox is only afraid of lightning, how much is it?"
"beginning of autumn" is the beginning of autumn and ends with "the first frost", and the "vernal equinox" is just half of the 90 days from beginning of autumn to the first frost. At the autumnal equinox, the Yangtze River basin and its vast northern area have entered autumn, and the daily average temperature has dropped below 22℃.
The cold air mass in the north began to have some influence. In most areas, the rainy season has just ended, with a cool breeze blowing gently, the sky is high and the clouds are light in Wan Liqing, the air is crisp in autumn, the sweet-scented osmanthus is fragrant, the crab is fat and the chrysanthemum is yellow, and the autumn equinox is a beautiful and pleasant season. It is also an important solar term in agricultural production. After the autumnal equinox, the direct sunlight moved to the southern hemisphere, and the northern hemisphere got less and less solar radiation, while the ground lost more heat and the temperature dropped significantly.
At this time, the waiting temperature in the southern region has generally dropped below 22℃, and it has entered a cool autumn. "An autumn rain and a cold". The cold air from the south meets the warm and humid air that gradually decays, which leads to repeated rainfall and the temperature drops again and again. In the northern part of the northwest plateau, the daily minimum temperature has dropped below 0℃, and you can already see the magnificent snow scene flying all over the sky and the earth wrapped in silver. It is rainy and humid in autumn in the south and Liangshan Prefecture, which has great influence on autumn harvest, autumn ploughing and autumn planting.