When is it coldest in a year?

Question 1: When is the coldest time of the year? (China solar terms related information)

Winter solstice (June 65438+February 265438 +0-23), with the longest night and the shortest sunshine time. Theoretically, this is the coldest day of the year.

Every year between 65438+1October 5-7, the sun is located at longitude 285. It's a slight cold. For China, a slight cold marks the beginning of the coldest day of the year. According to China's meteorological data, slight cold is the lowest temperature solar term, and the temperature of great cold is lower than slight cold in only a few years.

Every year around 65438+10.20, when the sun reaches 300, it is called "Great Cold". Great cold refers to extremely cold weather. "Give time to pass the exam? Shi Tian quoted Li San Zong Yi as saying: "Great cold is the middle, and the upper form is slight cold, so it is called Great Cold ... extremely cold, so it is called Great Cold. "At this time, the cold wave frequently goes south, which is the cold period of the year in most parts of China. The wind is strong, the temperature is low, and the snow on the ground does not melt, showing a cold scene of ice and snow. The Great Cold is the last of the 24 solar terms.

After slight cold 15 days is severe cold. Modern meteorological observation records show that in some areas of China, severe cold is not as good as slight cold, but in some years and a few coastal areas, the lowest temperature in the whole year will still appear in severe cold solar terms. The great cold solar term is also the cold period of the year.

China folk, from the day after winter solstice, entered the cold weather. From the second day of winter on the solstice, you will enter the "Nine Counties", and every nine days will be a unit, which is called "Nine-Nine Cold Relieving Songs": "1929 don't do it, walk on the ice in 3949 ..." It is also said that "1929 you will get involved in your arms.

Question 2: When is the coldest time of the year? The coldest time in winter in our country is slight cold and severe cold, which is roughly in January.

Minor Cold

The slight cold value is around Gregorian calendar 1.5. After the slight cold, it began to enter the cold season. When cold air accumulates for a long time, it becomes cold. At this time, the weather is cold but not extreme, so it is called slight cold. The "March 9th" in the middle of winter is basically within this solar term. In meteorological records, it is the coldest weather in a year, and it is said that slight cold is better than severe cold. Because of the low temperature, wheat, fruit trees, stored melons and vegetables and livestock and poultry often suffer from freezing injury. "Slight cold and severe cold are frozen into a ball" and "Walking in the street, losing money" are all ancient folk proverbs describing the cold season. In the agricultural society, at this time, farming has ended and harvesting has been completed, and every household has begun to buy new year's goods and prepare for the New Year. A slight cold solar fog will make the next year's grain harvest abundant. It cleared up after the cold lake, and the west wind was frosty. On the first day of the twelfth lunar month, there was a disaster of six animals in Dongfeng. If there is heavy snow and drought this year, if it is weather, farmers will make a fortune next year.

Major Cold

The great cold is around Gregorian calendar 1.20. At this time, the weather is extremely cold, so it is called great cold. The Great Cold is the last solar term in a year, which is often higher between April 9 and May 9. The average temperature in the Yangtze River basin in China is -2-4℃, the lowest temperature is generally-14~ 17℃, and the extreme minimum temperature can be reduced to -20℃. The maximum frozen soil depth is 30~40 cm, which is the deepest solar term of frozen soil in the whole year. In some years, the annual minimum temperature will appear in this solar term.

Question 3: When is the coldest time of the year in the north? It must be three or nine days. Although the winter solstice is theoretically the farthest day from the sun on the Tropic of Cancer and the shortest day with light, in fact, after the winter solstice, the temperature will continue to drop for a period of time, just as the coldest time of the day is not when the sun is facing us, but at dawn, because the earth is absorbing the amount of ignorance at this time. Similarly, although the illumination time will be gradually extended after the winter solstice, the weak heat will be absorbed by the earth, and the temperature will decrease when the earth absorbs heat, and it will not start to heat up slowly until the ground temperature is the same as the temperature.

Question 4: When is the coldest time of the year? The coldest time in winter in China is slight chill and severe cold, which is roughly in January.

Minor Cold

The slight cold value is around Gregorian calendar 1.5. After the slight cold, it began to enter the cold season. When cold air accumulates for a long time, it becomes cold. At this time, the weather is cold but not extreme, so it is called slight cold. The "March 9th" in the middle of winter is basically within this solar term. In meteorological records, it is the coldest weather in a year, and it is said that slight cold is better than severe cold. Because of the low temperature, wheat, fruit trees, stored melons and vegetables and livestock and poultry often suffer from freezing injury. "Slight cold and severe cold are frozen into a ball" and "Walking in the street, losing money" are all ancient folk proverbs describing the cold season. In the agricultural society, at this time, farming has ended and harvesting has been completed, and every household has begun to buy new year's goods and prepare for the New Year. A slight cold solar fog will make the next year's grain harvest abundant. It cleared up after the cold lake, and the west wind was frosty. On the first day of the twelfth lunar month, there was a disaster of six animals in Dongfeng. If there is heavy snow and drought this year, if it is weather, farmers will make a fortune next year.

Major Cold

The great cold is around Gregorian calendar 1.20. At this time, the weather is extremely cold, so it is called great cold. The Great Cold is the last solar term in a year, which is often higher between April 9 and May 9. The average temperature in the Yangtze River basin in China is -2-4℃, the lowest temperature is generally-14~ 17℃, and the extreme minimum temperature can be reduced to -20℃. The maximum frozen soil depth is 30~40 cm, which is the deepest solar term of frozen soil in the whole year. In some years, the annual minimum temperature will appear in this solar term.

Question 5: When is the coldest day? The lowest temperature appears around sunrise. The earth's orbit around the sun is an ellipse close to a perfect circle, and the sun is located at a focus of the elliptical orbit, so that the distance between the sun and the earth is constantly changing in a year or even a day. At the beginning of June 5438+ 10 every year, the earth is at the perihelion of its orbit around the sun, and the distance between the sun and the earth reaches the minimum, which is about 1.4438+0 billion kilometers. At the beginning of July every year, the earth is at the perihelion of its orbit around the sun, and the distance between the sun and the earth reaches the maximum, about 1.55438+0 billion kilometers. Compared with the average distance between the sun and the earth (6.5438+49.6 million kilometers), the change difference of the distance between the sun and the earth within one year (05 million kilometers) is almost negligible. Then in one day, the change of the distance between the sun and the earth is even more insignificant. The temperature change of the earth in a day or a year has nothing to do with the distance between the sun and the earth, but with the angle between the sunlight and the ground level. At noon 12, the solar altitude angle is the largest, and the equivalent solar radiation passes through the shortest atmosphere, is weakened by the atmosphere at least, and reaches the ground at most. At the same time, the solar radiation is strongest at 12, because the solar altitude angle is the largest, the area affected by the same amount of solar radiation is the smallest, and the solar radiation per unit area is the most on the ground. However, after noon, although solar radiation began to weaken, the heat gained on the ground was still more than the heat lost by ground radiation. The ground temperature continues to rise, the ground radiation continues to increase, and the temperature will continue to rise. With the continuous weakening of solar radiation, at a certain moment, when the heat gained by the ground is less than the heat lost by the ground radiation, that is, when the heat on the ground changes from surplus to loss, the ground temperature will reach the maximum value within one day. It's about 13 in the afternoon. Next, the ground will transfer heat to the atmosphere through radiation, convection, turbulence, etc., which still needs a process, so the temperature will not reach the highest until about 14 in the afternoon. Therefore, the highest temperature in a day appears in the afternoon 14. After 14: 00, the solar radiation gradually decreases, and the ground temperature drops, so does the temperature. After sunset, there was no solar radiation income, only heat expenditure, and the ground temperature continued to decrease until around sunrise the next day, when there was solar radiation income again, and the temperature reached the lowest value of the day.

Question 6: When is the coldest in the second half of the year? 50 minutes to see the position, my g.

Question 7: When is the coldest time of the year? (China solar terms related information)

Winter solstice (June 65438+February 265438 +0-23), with the longest night and the shortest sunshine time. Theoretically, this is the coldest day of the year.

Every year between 65438+1October 5-7, the sun is located at longitude 285. It's a slight cold. For China, a slight cold marks the beginning of the coldest day of the year. According to China's meteorological data, slight cold is the lowest temperature solar term, and the temperature of great cold is lower than slight cold in only a few years.

Every year around 65438+10.20, when the sun reaches 300, it is called "Great Cold". Great cold refers to extremely cold weather. "Give time to pass the exam? Shi Tian quoted Li San Zong Yi as saying: "Great cold is the middle, and the upper form is slight cold, so it is called Great Cold ... extremely cold, so it is called Great Cold. "At this time, the cold wave frequently goes south, which is the cold period of the year in most parts of China. The wind is strong, the temperature is low, and the snow on the ground does not melt, showing a cold scene of ice and snow. The Great Cold is the last of the 24 solar terms.

After slight cold 15 days is severe cold. Modern meteorological observation records show that in some areas of China, severe cold is not as good as slight cold, but in some years and a few coastal areas, the lowest temperature in the whole year will still appear in severe cold solar terms. The great cold solar term is also the cold period of the year.

China folk, from the day after winter solstice, entered the cold weather. From the second day of winter on the solstice, you will enter the "Nine Counties", and every nine days will be a unit, which is called "Nine-Nine Cold Relieving Songs": "1929 don't do it, walk on the ice in 3949 ..." It is also said that "1929 you will get involved in your arms.

Question 8: When is the coldest time of the year? The coldest time in winter in our country is slight cold and severe cold, which is roughly in January.

Minor Cold

The slight cold value is around Gregorian calendar 1.5. After the slight cold, it began to enter the cold season. When cold air accumulates for a long time, it becomes cold. At this time, the weather is cold but not extreme, so it is called slight cold. The "March 9th" in the middle of winter is basically within this solar term. In meteorological records, it is the coldest weather in a year, and it is said that slight cold is better than severe cold. Because of the low temperature, wheat, fruit trees, stored melons and vegetables and livestock and poultry often suffer from freezing injury. "Slight cold and severe cold are frozen into a ball" and "Walking in the street, losing money" are all ancient folk proverbs describing the cold season. In the agricultural society, at this time, farming has ended and harvesting has been completed, and every household has begun to buy new year's goods and prepare for the New Year. A slight cold solar fog will make the next year's grain harvest abundant. It cleared up after the cold lake, and the west wind was frosty. On the first day of the twelfth lunar month, there was a disaster of six animals in Dongfeng. If there is heavy snow and drought this year, if it is weather, farmers will make a fortune next year.

Major Cold

The great cold is around Gregorian calendar 1.20. At this time, the weather is extremely cold, so it is called great cold. The Great Cold is the last solar term in a year, which is often higher between April 9 and May 9. The average temperature in the Yangtze River basin in China is -2-4℃, the lowest temperature is generally-14~ 17℃, and the extreme minimum temperature can be reduced to -20℃. The maximum frozen soil depth is 30~40 cm, which is the deepest solar term of frozen soil in the whole year. In some years, the annual minimum temperature will appear in this solar term.

Question 9: When is the coldest day? The lowest temperature appears around sunrise. The earth's orbit around the sun is an ellipse close to a perfect circle, and the sun is located at a focus of the elliptical orbit, so that the distance between the sun and the earth is constantly changing in a year or even a day. At the beginning of June 5438+ 10 every year, the earth is at the perihelion of its orbit around the sun, and the distance between the sun and the earth reaches the minimum, which is about 1.4438+0 billion kilometers. At the beginning of July every year, the earth is at the perihelion of its orbit around the sun, and the distance between the sun and the earth reaches the maximum, about 1.55438+0 billion kilometers. Compared with the average distance between the sun and the earth (6.5438+49.6 million kilometers), the change difference of the distance between the sun and the earth within one year (05 million kilometers) is almost negligible. Then in one day, the change of the distance between the sun and the earth is even more insignificant. The temperature change of the earth in a day or a year has nothing to do with the distance between the sun and the earth, but with the angle between the sunlight and the ground level. At noon 12, the solar altitude angle is the largest, and the equivalent solar radiation passes through the shortest atmosphere, is weakened by the atmosphere at least, and reaches the ground at most. At the same time, the solar radiation is strongest at 12, because the solar altitude angle is the largest, the area affected by the same amount of solar radiation is the smallest, and the solar radiation per unit area is the most on the ground. However, after noon, although solar radiation began to weaken, the heat gained on the ground was still more than the heat lost by ground radiation. The ground temperature continues to rise, the ground radiation continues to increase, and the temperature will continue to rise. With the continuous weakening of solar radiation, at a certain moment, when the heat gained by the ground is less than the heat lost by the ground radiation, that is, when the heat on the ground changes from surplus to loss, the ground temperature will reach the maximum value within one day. It's about 13 in the afternoon. Next, the ground will transfer heat to the atmosphere through radiation, convection, turbulence, etc., which still needs a process, so the temperature will not reach the highest until about 14 in the afternoon. Therefore, the highest temperature in a day appears in the afternoon 14. After 14: 00, the solar radiation gradually decreases, and the ground temperature drops, so does the temperature. After sunset, there was no solar radiation income, only heat expenditure, and the ground temperature continued to decrease until around sunrise the next day, when there was solar radiation income again, and the temperature reached the lowest value of the day.

Question 10: When is the coldest time of the year? The coldest time in winter in China is slight chill and severe cold, which is roughly in January.

Minor Cold

The slight cold value is around Gregorian calendar 1.5. After the slight cold, it began to enter the cold season. When cold air accumulates for a long time, it becomes cold. At this time, the weather is cold but not extreme, so it is called slight cold. The "March 9th" in the middle of winter is basically within this solar term. In meteorological records, it is the coldest weather in a year, and it is said that slight cold is better than severe cold. Because of the low temperature, wheat, fruit trees, stored melons and vegetables and livestock and poultry often suffer from freezing injury. "Slight cold and severe cold are frozen into a ball" and "Walking in the street, losing money" are all ancient folk proverbs describing the cold season. In the agricultural society, at this time, farming has ended and harvesting has been completed, and every household has begun to buy new year's goods and prepare for the New Year. A slight cold solar fog will make the next year's grain harvest abundant. It cleared up after the cold lake, and the west wind was frosty. On the first day of the twelfth lunar month, there was a disaster of six animals in Dongfeng. If there is heavy snow and drought this year, if it is weather, farmers will make a fortune next year.

Major Cold

The great cold is around Gregorian calendar 1.20. At this time, the weather is extremely cold, so it is called great cold. The Great Cold is the last solar term in a year, which is often higher between April 9 and May 9. The average temperature in the Yangtze River basin in China is -2-4℃, the lowest temperature is generally-14~ 17℃, and the extreme minimum temperature can be reduced to -20℃. The maximum frozen soil depth is 30~40 cm, which is the deepest solar term of frozen soil in the whole year. In some years, the annual minimum temperature will appear in this solar term.