The weather is reversed today.

This year's winter in Shanghai has experienced a cold wave weather that was not seen last year. It was windy for two days and plummeted to MINUS 7 degrees. After three days, the temperature began to recover gradually, even to the point where it was necessary to wear spring clothes. Anyone familiar with the weather in Shanghai will know that if it rains in Shanghai after 65438+February, the degree of humidity and cold is actually more terrible than that in the north. Because wet cold is the kind of cold that invades the bone marrow, if the air conditioner is turned on alone, the air will actually be very dry and people's skin will be uncomfortable, so generally speaking, people are not used to sleeping with the air conditioner on. And floor heating has become a popular decoration method. Many elderly people prefer a heater like Youting, which won't make the room dry and silent. Some people are used to making soup or putting water bags under the bed, and they will feel unusually warm when they sleep.

As can be seen from the weather forecast, although the high temperature in Shanghai has been above 15 degrees for several days, it will only drop to about 2~3 degrees at night when there is plenty of sunshine during the day. People still need to wear winter clothes for a long time and cannot take them off blindly. After all, winter is still going on. At noon, when the temperature is above 15 degrees, many people hold coats in their hands, because they will sweat all over, especially those who walk outdoors, and cold drinks such as ice cream suddenly sell well. The old man couldn't stand the heat, so he sat down to eat an ice cream cone and have a rest. In the street, you will see the phenomenon of disorderly dressing. Some people wear down jackets, while others just take off a thin sweater. People are still used to preparing winter clothes, because night is the feeling of entering the cold winter.

The sharp reversal of temperature is related to the greenhouse effect in the big climate. There will be cold days in winter, but the duration will not be too long, and it will become very hot in summer. After all, Shanghai is also a southern city. The duration of winter is about 2~3 months, but sometimes the temperature is not very low, but compared with the cities in the south, there is still a biting cold wind. And there is no heating in Shanghai. Even when it is particularly cold, people still need some cold-proof equipment. However, hot air conditioners that are dry and easily sensitive to skin are not very popular.

Although there is a sudden high temperature in winter, people will temporarily take off their winter clothes, but the temperature mixed with cold and warm or roller coaster is still stressful, especially for the elderly with cardiovascular diseases, they should put on and take off their clothes reasonably, and try to reduce going out in particularly cold weather.