Are the Beginning of Autumn and the Autumnal Equinox the same? What is the difference between the Beginning of Autumn and the Autumnal Equinox?
Introduction: The solar terms are one of the traditional cultures of our country since ancient times, and they play a certain role in the development of farming culture. However, some solar terms are confused. So are the Beginning of Autumn and the Autumnal Equinox the same? What is the difference between the Beginning of Autumn and the Autumnal Equinox? The sixth lunar month has already entered summer, and summer is approaching. If you want to know about the sixth lunar month of 2018, come to the Fortune Teller Internet Cafe.Are the Beginning of Autumn and the Autumnal Equinox the same? What is the difference between the Beginning of Autumn and the Autumnal Equinox?Beginning of Autumn: August 6-9 every year when the sun reaches 135° of the ecliptic longitudeAutumnal Equinox Time: September 22-24 every year when the sun reaches 180 degrees of the ecliptic longitude <br /> Liqiu is the 13th solar term in the 24 solar terms of the lunar calendar and the first solar term of autumn, marking the official start of the first month of autumn: "Autumn" means the end of summer and the beginning of coolness. When the Beginning of Autumn comes, the paulownia trees start to shed their leaves, hence the idiom “falling leaves indicate the coming of autumn”. From a literary perspective, the word "autumn" is composed of the characters "禾" and "火", which means the maturity of crops. Autumn is a transitional season when the weather changes from hot to cool, and then from cool to cold. The Autumnal Equinox, the sixteenth solar term in the twenty-four solar terms of the lunar calendar, usually falls on September 22-24 every year. The climate in the south begins to enter autumn from this solar term. First, the sun reaches 180 degrees of ecliptic longitude on this day, directly shining on the earth's equator. Therefore, in most parts of the earth, the 24 hours of day and night are equally divided, 12 hours each. Climate characteristics of the Beginning of Autumn"Li Qiu" has arrived, but it does not mean that the autumn weather has arrived. The division of climate seasons is based on the "average temperature", that is, the local average temperature for five consecutive days is below 22℃, which is the real autumn season. China has a vast territory. Although the climate varies from place to place, most areas have not yet entered the autumn climate at this time. Moreover, the last of the hottest days of the year is on the third day after the beginning of autumn.Especially in southern China, it is still summer during this solar term. At the same time, as the typhoon rain season is gradually passing, the temperature is even hotter. Therefore, Chinese medicine calls the period from the beginning of autumn to the autumnal equinox "long summer". Heilongjiang and northern Xinjiang, the earliest regions to enter autumn, do not enter autumn until mid-August. In normal years, the capital Beijing begins to feel the cool autumn breeze in early September, and autumn begins in the Qinhuai area from mid-September. Climate characteristics of the Autumnal EquinoxAfter the autumnal equinox, the position of the sun's direct rays moves to the southern hemisphere. The northern hemisphere receives less and less solar radiation, while the ground loses more heat, and the rate at which the temperature drops significantly accelerates. The "Autumnal Equinox" is exactly half of the 90 days from the Beginning of Autumn to the Frost Descent.From the day of the autumnal equinox, the climate presents three main characteristics: the position of direct sunlight continues to move from the equator to the southern hemisphere, the phenomenon of shorter days and longer nights in the northern hemisphere will become more and more obvious, with the days gradually getting shorter and the nights getting longer (until the winter solstice when the nights are longest and the days are shortest); the temperature difference between day and night gradually increases, and the amplitude will be more than 10°C; the temperature drops day by day, getting colder day by day, and gradually entering the late autumn season. The situation in the Southern Hemisphere is exactly the opposite. |
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