How cold was it on March 9th?
"The winter solstice is as hard as ice." At this time, the average temperature in Mohe River in the northernmost part of Heilongjiang Province is around -30℃, and the lowest temperature can reach -50℃, which can be described as splashing water into ice and exhaling into frost. In North China, the rivers are frozen firmly, and Hukou Waterfall has entered the best period to watch the frozen wonders, while the south is also undergoing the test of low temperature. The air humidity in Jiangnan and Southwest China is above 70%. When the temperature near freezing point is superimposed, the indoor and outdoor without heating is as cold as an ice bank, making people cold to nowhere to hide. Sometimes, when the cold air is strong enough, raindrops will fall and attach to telephone poles, trees and roads.
Three or nine cold or four or nine cold?
Statement 1: Sanjiu is colder.
During the winter solstice, the daytime is the shortest, the angle of direct sunlight on the ground is the smallest, and the sunshine intensity per unit area on the ground is also the smallest, so the ground gets the least solar heat every day, and the daily heat budget deficit on the ground has not reached the maximum.
On the solstice after winter, although the day is growing day by day, the growth rate is very slow. From the winter solstice to the "March 9" period, the average daily growth is only about one minute. At the same time, the angle between the direct angle of the sun and the ground is slowly increasing. The daily heat budget of the ground is still in deficit, so it continues to lose heat and the ground temperature continues to drop.
The deficit of total heat balance on the ground only reaches the maximum in the season of March 9. Because the temperature is mainly affected by the ground temperature, this leads to the lowest temperature in the "March 9" season. In addition, around March 9, the cold air mass in Siberia also developed to a very strong stage, and the frequent invasion of strong cold air is also one of the reasons for the low temperature.
Statement 2: 49 is colder.
There is a folk proverb in China that "the first nine days are warm, and the last nine days are cold". It turns out that if the first nine days are warm, the next winter will be particularly cold. Therefore, it is said that "the first day is not greedy, and the rain and snow continue to winter." "Yanjing Age" said: "The winter solstice on March 9 is difficult." It means that it has entered the coldest stage in cold weather since March 9. "Jing Fang Yizhan" said: "The solstice after beginning of winter is extremely cold on the 30th", "The third solstice after beginning of winter is the coldest in the twelfth month."
Later, people generally thought that March 9 was the coldest day, but in fact, April 9 was the coldest time in winter. It was only a few days before March 9 that the temperature changed greatly, and suddenly it became cold, so the body did not adapt, so it was particularly cold. On April 9, although the temperature was lower than that on March 9, the temperature difference changed little, and it didn't feel as cold as when it entered March 9 from February 9.
Small coup of keeping warm in 3949
1, afraid of cold: it is best to eat ginger to drive away the cold.
Fear of cold is a common feature of many elderly people. Because people's metabolism slows down after aging, it is easy to form qi and blood deficiency. Therefore, autumn and winter are very rare opportunities for the elderly to treat diseases.
When it comes to tonic, some people think of ginseng, velvet antler and cordyceps sinensis, which are precious medicinal materials. Every time I go home to honor my parents during the New Year, I will buy these tonics. This is a wrong concept. The most common food is also the best medicine, and the cheaper the food, the better the curative effect.
2. Qi: Every nine chickens.
Food supplement in winter is inseparable from meat. Although generally speaking, eating less meat is good for health, the elderly are weak and it is difficult to meet the needs of tonic by vegetarian diet. In winter, they should eat some meat properly.
However, different meats are different. Chinese medicine studies meat very carefully. Different kinds of meat have different properties and tastes, so there is no need to eat all kinds of meat for tonic.
People who are healthy, not weak and not dry can eat more chicken in winter. As the saying goes, "every 9/kloc-0 chicken will make you healthy in the coming year." Chicken is slightly warm, tends to be dull, and has little stimulation to human body. Chicken can not only provide rich nutrition, but also resist the cold slightly in winter and prevent people from eating internal fire. It is a good product for health preservation in winter. Chicken is best stewed, and stewed chicken with mushrooms is a classic chicken stew.