Is it dry in autumn?

In autumn, the cold air in the north is constantly invading, but its power is not very strong. Autumn weather often forms in northern China, and continuous autumn rain often appears in West China. The temperature will gradually drop in autumn, but it is generally slower than in winter. Due to the difference of dry and wet conditions, there will be cold and rainy weather conditions or dry and cool weather conditions in different regions.

In the cold late autumn, due to the large temperature difference between day and night, the water vapor transpiration during the day will condense at night, either dew or frost. In autumn, the direct point of the sun gradually moves south from the northern hemisphere, passes through the equator after the autumnal equinox, and the sun directly shines in the southern hemisphere. Seen from the northern hemisphere, the angle of the sun gradually becomes lower, and the gap between day and night becomes smaller. At the autumnal equinox, the length of day and night is equal.

(2) Extended data of autumn climate dryness in Central Europe.

Division standard: Four seasons are divided according to climate and average temperature, and the index is that the period when the average temperature is lower than 10℃ is winter, the period when it is higher than 22℃ is summer, and the period when 10~22℃ is spring and autumn respectively. July to September in the lunar calendar, autumnal equinox to beginning of winter, September to 165438+ October in the solar calendar, and autumnal equinox to winter solstice in astronomy. In China, autumn begins in early autumn, passes through early autumn, Mid-Autumn Festival and late autumn, and finally ends in early winter.

The phenological standard studied by meteorologists is: after the intense summer heat, the average temperature for five days is stable below 22℃, which means that it enters autumn and ends when it is below 10℃.

3. Why is it dry in autumn?

The lower the temperature, the drier it is, and the drier it is in winter. Because the temperature is low and the water evaporates less, the water in the air is naturally dry.

4. Is it because autumn comes that you feel dry?

Autumn is coming, the weather is cold, there is little rain, the weather is dry, drink more water, and usually eat more fruits to replenish water.

5. Why do you feel dry in autumn?

The skin refuses to dry in autumn.

Generally speaking, it can be said that autumn and winter are the most prone to skin problems in a year, and most of the problems are related to dry and sensitive skin, which makes many women very upset. Why does the skin become particularly dry and sensitive?

Let's analyze the physiological changes of skin: in addition to protection and feeling, the most important function of skin is to regulate body temperature, and secondly, excretion and secretion are also very important. Whenever the climate gets hot or the humidity increases, the metabolism of the body will also increase. At this time, in order to maintain a proper body temperature and excrete a large number of metabolites, the function of sweat glands is of course maintained at a relatively strong level. At this time, the pores open, sweat glands open, sebaceous glands secrete more, sweat excretion also increases, so that excess heat and metabolites are excreted.

However, when the climate turns cold, in order to reduce energy consumption, the metabolism of the human body is also reduced, the pores are closed, and the excretion of sweat glands and sebaceous glands is reduced. With the decrease of these secretions and excretions, the oil content on the skin surface also decreases. If your skin is dry or older, it is more likely to cause dry skin and dry sensitive skin with water shortage in the stratum corneum.

For dry skin, the secret of maintenance is: drink more water, less irritation, moisturize frequently, use nutritious and moisturizing skin care products, avoid too hot water and irritating facial cleanser, and prevent the moisturizing layer on the skin from being washed away.