Geography During the winter solstice, the geographical knowledge points of the winter solstice

aa Cold air from the Siberian high pressure blows into Pakistan from the northeast.

c 。If Beijing time is noon, then the day at 0:00 is 60 degrees west longitude, 180 degrees east longitude is 15 o'clock, and the date is reduced by one day beyond 180 degrees east longitude, to December 21. From 60 degrees west to 180 degrees east longitude, it is December 22.

d 。At this time, the southern hemisphere is in summer, and the Brazilian warm current passes through the east of the Brazilian plateau all year round and blows southeast trade winds all year round, bringing abundant water vapor, and the rainfall should be considerable in the highland topography. No vegetation withers.

c The seasons in the northern and southern hemispheres are opposite, and there are many countries in the northern hemisphere and a large land area! The winter solstice in the Northern Hemisphere is December 22. So more than half of the world is.

Discipline knowledge] Common knowledge points of winter solstice geography, must see**)! Henan High School Entrance Examination.

Subscribe to the winter solstice (winter solstice), which is an important solar term in the Chinese lunar calendar and a traditional festival of the Chinese nation. On the day of the winter solstice, the sun reaches the southernmost point of the year, almost reaching the Tropic of Capricorn (23°26 south latitude).'）。On this day, the Northern Hemisphere receives the least amount of sunlight, 50% less than the Southern Hemisphere.

The days are at their shortest in the Northern Hemisphere and get shorter the further north they go. For example, the southernmost part of China, Zengmu Dark Sha (2°33'N), had a daylight of 11 hours and 59 minutes, Haikou City had about 10 hours and 55 minutes, Hangzhou City had 10 hours and 12 minutes, Beijing City had about 9 hours and 20 minutes, and Mohe County of Heilongjiang Province (52°58'N), known as the "northernmost point of China", had only 7 hours and 34 minutes. After the winter solstice, the night sky and stars are completely replaced by winter stars, and from today onwards, it will "enter the nine".

At this time, it is the height of summer in the southern hemisphere.

It is more common in northern China that there is a custom of eating dumplings on the winter solstice. As the saying goes: "When the winter solstice arrives, eat dumplings."

In the south, rice balls are eaten, with exceptions. For example, in Sichuan and Tengzhou, Shandong, the custom of drinking mutton soup on the day of the winter solstice is popular, which means to drive away the cold. Food customs vary from place to place, but eating dumplings is the most common.

On the winter solstice (around December 22), the direct point of the sun is on the Tropic of Capricorn (23°26's), after which it moves northward.

On the day of the winter solstice, the sun reaches the southernmost point of the year, almost reaching the Tropic of Capricorn (23°26 south latitude).On the day of the winter solstice, our northern hemisphere receives the least amount of sunlight, 50 less than the southern hemisphere, and the days reach their shortest, and the days get shorter the further north you go.

At the same time, the winter solstice is also the day when the sun is at its lowest at noon in all parts of the Northern Hemisphere. After the winter solstice, the night sky and stars are completely replaced by winter stars, and from the day of the winter solstice, it begins to "enter the nine". At this time, it is the height of summer in the southern hemisphere.

The concept of the point of direct sunlight and the law of activity.

The direct solar point is the point where the angle of incidence of sunlight on the earth's surface (i.e., the angle of solar altitude) is 90 degrees, and it is the intersection of the geocentric and heliocentric lines and the earth's spherical surface. It is 12 noon at the meridian where the direct point of the sun is located.

The activity pattern of the direct sun point is as follows: the spring equinox (around March 21), the direct sun point is at 0° at the equator, and then moves north. On the summer solstice (around June 22), the direct point of the sun is over the Tropic of Cancer (23°26'N) and then moves south.

At the autumnal equinox (around September 23), the direct point of the sun is at 0° equator, and then continues to move south. On the winter solstice (around December 22), the direct point of the sun is on the Tropic of Capricorn (23°26's), after which it moves northward.

The geographical significance of the point where the sun shines directly.

1.The movement of the direct point of the sun causes changes in the global heat distribution.

2.The seasonal shift of the direct point of the sun drives the north-south shift of the planetary system.

3.The seasonal shift of the direct point of the sun causes changes in the length of day and night and the height of the sun at noon.

Among the 24 solar terms, the winter solstice is the shortest day and the longest night in the Northern Hemisphere.

On the day of the winter solstice, although the sun is low and the days are short, in terms of meteorology, the temperature of the winter solstice is not the lowest. In fact, it is usually not very cold before the winter solstice due to the "accumulated heat" on the surface, and the real cold is after the winter solstice. Due to the great disparity in climate across our country, this climatic winter is obviously late for most parts of our country.

When the winter solstice arrives, it marks that it is about to enter the cold season, and the folk began to "count nine" to calculate the cold days (folk proverb: "the summer solstice is three Geng, and the winter solstice is counted nine").

The winter solstice is the southernmost day of the year, after which the direct point of the sun begins to move northward from the Tropic of Capricorn, the length of the day in the northern hemisphere begins to gradually increase, and the height of the sun at noon also gradually increases.

It is worth noting that around the winter solstice, the Earth is located near perihelion and moves at a slightly faster speed, which results in the Sun spending about 8 days of the year in the Southern Hemisphere than in the Northern Hemisphere, so the winter in the Northern Hemisphere is slightly shorter than the summer in the Northern Hemisphere.

The arrival of the winter solstice solar term marks the beginning of a cold winter. On this day, the Northern Hemisphere received the least solar radiation, about 50% less than the Southern Hemisphere. However, this is not the coldest time, the so-called "cold in."

Three. Nine, forty-nine". This is because there is an atmosphere and water on the earth's surface, which can store heat, and it is not "stored and lost", but "accumulated heat".

As a result, the weather is usually not very cold before the winter solstice. After the winter solstice, although the altitude angle of the sun gradually rises, it is a slow recovery process, and the heat lost every day is still greater than the heat received, showing a situation of "making ends meet". To the "three.

Nine, forty-nine days", the least accumulated heat, the lowest temperature, the weather is getting colder and colder. At this time, if there is the influence of cold air, the weather is even colder. After this "cold front", the weather will gradually warm.

Summary. The winter solstice is celebrated on December 21 every year, which is a traditional Chinese festival and the longest night of the year, and is the day when the Chinese people celebrate the winter festival.

Hello dear, The winter solstice refers to the day when the sun reaches the ecliptic longitude of 270° every year, and it is also the origin of the traditional Chinese cong liang festival "winter solstice". The winter solstice is a traditional Chinese festival and the first solar term of the Chinese lunar calendar, marking the beginning of the year. The geographical location of the winter solstice is the day when the sun reaches the ecliptic longitude of 270° every year, that is, the arrival of winter in the northern half of the Changqiu.

The winter solstice is celebrated on December 21 every year, which is a traditional Chinese festival and the longest night of the year, and is the day when the Chinese people celebrate the winter festival.

The geographical significance of the winter solstice is that on the day of the winter solstice, the direct point of the sun is on the Tropic of Capricorn, so that the area north of the Tropic of Cancer has the shortest daytime and the longest nighttime.

On the winter solstice, the sun shines directly on the Tropic of Capricorn of the Earth, and on this day, the Northern Hemisphere has the shortest days and the longest nights. From now until the summer solstice, the days will gradually get longer.

On the winter solstice, the sun shines at the highest in the Tropic of Capricorn, and the northern land is the longest day and night, and after the winter solstice, the days are getting longer and longer day by day.

The winter solstice is a very important solar term in China's lunar calendar, and it is also a traditional festival. The winter solstice is commonly known as the "Winter Festival", "Long Solstice Festival", "Ya Sui" and so on. As early as the Spring and Autumn Period more than 2,500 years ago, China has used Tugui to observe the sun to determine the winter solstice, which is the earliest one of the 24 solar terms.

The time is between December 22 or 23 of the solar calendar every year.

The winter solstice is the shortest day and longest night in the Northern Hemisphere. The ancients said that the winter solstice is: the solstice of the cathode, the beginning of the yang, the solstice of the south of the sun, the solstice of the short day, and the solstice of the long shadow of the sun, so it is called the "winter solstice".

After the winter solstice, the climate in various places has entered the coldest stage, that is, people often say "into the nine", our people have "cold in Sanjiu, hot in Sanfu" saying.

Modern astronomical science has determined that on the winter solstice, the sun shines directly on the Tropic of Capricorn, and the sunlight is the most inclined to the northern hemisphere, the northern hemisphere has the shortest day and the longest night, and after this day, the sun gradually moves north.

In ancient China, the winter solstice was very important, and the winter solstice was regarded as a larger festival, and there was a saying that "the winter solstice is as big as the year", and there was a custom to celebrate the winter solstice. In the Book of Han, it is said: "The winter solstice is yang, and the monarch is long, so he congratulates."

It is believed that after the winter solstice, the days are getting longer day by day, and the yang energy is rising, which is the beginning of a solar term cycle and an auspicious day, which should be celebrated. The Book of Jin records that "on the winter solstice of the Wei and Jin dynasties, he was congratulated by all countries and hundreds of bureaucrats......Its ritual is inferior to Zhengdan.

It shows that the ancient times attached great importance to the winter solstice.

Now, some places still celebrate the winter solstice as a festival. In the northern region, there is a custom of slaughtering sheep, eating dumplings and eating wontons on the winter solstice, while in the southern region, there is a habit of eating winter solstice rice balls and winter solstice long-line noodles on this day. On the day of the winter solstice, various regions also have the custom of worshiping the heavens and ancestors.

Good morning, my friends.

The winter solstice is a solar term divided by astronomy, and it was called in ancient times"The days are short"、"The days are short"。On the day of the winter solstice, the sun is located at 270 degrees of ecliptic longitude, and the sunlight almost reaches the Tropic of Capricorn, making it the shortest day of the year in the Northern Hemisphere. In most parts of southern China, there are no about 10 hours from sunrise to day.

After the winter solstice, as the Earth orbits around the Sun, the direct sunlight zone gradually moves northward, causing the Northern Hemisphere to gradually increase the number of days and shorten the nights.

Although the winter solstice has the lowest base solar altitude and the shortest sunshine hours, the ground absorbs more heat than it loses, and it begins after the winter solstice"Number nine", one every nine days"Nine"。to"Thirty-nine"Before and after, the ground has the least amount of heat and the coldest weather, so it is said"Cold in Sanjiu"。

Astronomically regards the winter solstice as the beginning of winter, which is obviously late for most parts of our country. During the winter solstice, the average temperature in the northwest plateau is generally below 0, and the temperature in the southern region is only about 6 to 8. However, in the low-altitude valleys of the southwest and northwest, even in the coldest month of January, the average temperature is still above 10.

Proverbs about the winter solstice The winter solstice is clear, the first month is rainy; Winter solstice rain, the first month is clear. (Zhejiang) winter solstice sunny, New Year's rain, Mid-Autumn Festival rain winter solstice clear. (Black).

The winter solstice is sunny, and the New Year rains; Winter solstice rain, New Year's sunny. (Lu, Xiang) The winter solstice is cold, and the Spring Festival is warm; The winter solstice is warm, and the spring festival is cold. (Hunan, Guangdong) The winter solstice is not cold, and the summer solstice is not hot. (Xiang).

The winter solstice is warm and cold until mid-March; The winter solstice is cold, and the spring will be warm early. (Gui) The winter solstice is warm, and the fire is roasted to a small full. (Gui).

According to the proverb that the wind, frost, rain, and snow of the winter solstice predict the future weather The northwest wind of the winter solstice will dry a spring in the coming year. (Jin).

Since the orbital plane of the earth revolving around the sun is the same as that of the equatorial plane, but maintains a certain inclination, the position of the direct sunlight on the earth is different throughout the year. In the northern hemisphere, when the sun shines directly at the northern latitude, it is called the summer solstice astronomy, and when the sun shines directly at the southern latitude, it is called the winter solstice.

For the Northern Hemisphere, the Sun shines directly at the Tropic of Capricorn, which is the farthest the Sun can reach south. Because the angle of the sun affects the air temperature, and the temperature of direct radiation is higher than that of oblique light, when the sun shines directly on the Tropic of Capricorn, the angle of solar exposure in the northern hemisphere reaches the lowest temperature of the year, and if other factors are put aside, the northern hemisphere reaches the lowest temperature on the day of the winter solstice.