How is a southerly day formed and what is a southerly day?

The formation of a southerly day is a warm and humid air stream blowing from the South China Sea, with the formation of a warm and humid air stream from the South China SeaSiberiaThe cold air heading south meets, forming a quasi-stationary front in the south, making the weather in the south unpredictable and very humid, during which there is light rain or fog, back to the south sky.

The phenomenon arises from this.

Back to the south of the day" appears when the humidity of the air.

Approaching saturation, the walls and even the floor will "bubble with water", and there will be a wet scene everywhere, and the air seems to be able to wring out water. And the dense fog is the most characteristic appearance of "returning to the southern sky".

According to statistics, when the phenomenon of returning to the south is severe, the visibility can be reduced to 50 meters. In the weather of Huinan, some items or food are easy to get damp, and then mildew and rot, so it is necessary to take appropriate moisture-proof measures.

Moisture-proof method on southerly days

1. Try to minimize the temperature difference between indoor and outdoor. Before the "cold tail warmer" will "resurge", use heaters, electric ovens and other heat source equipment to heat the room, so that the indoor temperature is equal to or slightly higher than the outdoor temperature.

2. Try to isolate the intrusion of warm and humid airflow. Pay close attention to weather changes, close doors and windows in time when you find that the wind direction changes from north to south, and close the doors of indoor wardrobes and kitchen cabinets to reduce the entry of warm and humid outdoor air.

3. Put some moisture-absorbing and moisture-absorbing substances indoors. The more economical and ideal is quicklime.

Massive lime), when the lime melts, it absorbs the water vapor in the air and releases heat, which has a warming effect on the room.

The south wind day is also called the absolute blue back to the south sky. Generally speaking, spring occurs in the south, and occasionally in the north. It usually occurs in April of the Gregorian calendar or after the rainy season. In the north, this weather is called the return tide, which usually lasts for a short time.

The four seasons in the north are distinct, and the indoor is often heated in the cold season, so the indoor humidity is much higher than the outdoor and only lifts, so in the spring, after the outdoor temperature rises, the indoor temperature is still higher than the outdoor, so it is difficult to have a southerly wind, because the water vapor is more likely to condense outdoors at a lower temperature.

In the south, the temperature tends to drop to lower levels after strong cold air moves south or after a rainy midwinter.

The main damage of the southerly wind is that the violently increased water vapor will undergo a phase change after encountering a cold object, and the rapid condensation will adhere to the cold object, and the larger the temperature difference, the faster the attachment speed.

As a result, if there is too much water vapor in the air, a large number of water droplets tend to condense on cold objects. Water droplets breed algae and mold, causing large areas of mold; Water droplets cause the insulation value to drop, resulting in short circuit or poor contact;

South wind day means that after the beginning of spring every year, there will be indoor moisture and water in some areas, resulting in damp and moldy clothes and furniture, which is often referred to as "south wind day". There is a proverb: the south wind blows warm, the north wind is cold, the east wind is wet and the west wind is dry.

The "south wind day" often referred to as "south wind day" is not a specific term in meteorology.

However, it is understandable that this resurgence is related to the warmer southerly winds, which usually occur every spring or during the rainy season.

The air is humid on a southerly day, which can easily cause a short circuit in electrical appliances, so check whether there are water droplets on the plug and socket before use, and if there is, you must wipe it dry before powering it on. Generally speaking, products such as televisions, video cameras, and digital cameras are most affected by southerly winds, while refrigerators and washing machines have little impact.

The north wind day is the northwest wind that prevails in winter in China, and the south wind day is the southeast wind that prevails in summer. Since the northwesterly wind comes from Siberia, it is cold and dry; The southeast wind comes from the ocean, so it is relatively humid.

The wind blows from the north and it is a northerly day, and the weather is cool, mostly sunny. The wind blows from the south, and the air is humid and warm. Mostly rainy days.

Southerly wind days refer to the phenomenon of indoor moisture returning to water in some areas after the beginning of spring every year, resulting in damp and moldy clothes and furniture.

There is a proverb: the south wind blows warm, the north wind is cold, the east wind is wet and the west wind is dry. The "south wind day" often referred to as "south wind day" is not a specific term in meteorology. But it is literally understood that this resurgence phenomenon is related to warmer southerly winds.

Southerly winds are usually seen in spring or during the rainy season. After the beginning of spring every year, there will be indoor moisture and water in some areas, resulting in damp and moldy clothes and furniture, which is often called the "south wind day" of the big town.

Causes of southerly winds

The indoor resurgence of the southerly wind is because after the winter, the indoor wall and floor temperature drops day by day, and the indoor heating rate is slower than the outdoor after the beginning of spring, when the outdoor air suddenly heats up violently, and it is very humid and rough, it will condense into small water droplets on the cold ground and walls when blown into the room, and even form a flowing water layer. If the morning is cloudy, too warm and there is a strong southerly wind, the tide will return on the same day.

In these areas, cold air affects from time to time in March and April every spring, resulting in lower surface temperatures such as buildings. After the cold air, the warm and humid airflow from Haili Yinyang quickly "counterattacked", the temperature rose rapidly, and the air humidity increased. When a cold surface encounters warm and humid air currents, water droplets are formed on floors and walls.