Why do you often feel windless in summer and cold in winter? 5

The winter monsoon is controlled by the westerly circulation, which is strong in winter and weak in summer. The summer monsoon is controlled by the subtropical high, which is strong in summer and weak in winter. The intensity of the subtropical high is related to the thermal effect of solar radiation, and in summer, the sun shines directly on the northern hemisphere, and the northern hemisphere subtropical high is strong.

Because the temperature is high in summer, even if there is wind, it will not feel cold, and in winter, the temperature will be low, and it will feel very cold at all.

The Earth always revolves around the Sun at an angle. In summer, when the sun hits the ground, the weather will be hot; In winter, the sun hits the ground obliquely, and the ground receives less sunlight than in summer, so the weather is cold.

So summer is summer, winter is winter, that's the difference!

In winter, the wind is generally blowing from the northwest. China is in the temperate monsoon region, due to the difference in the nature of the sea and land, the land breeze blows in winter. The center of the high pressure on the mainland is the Siberian high on the DAO.

The wind blows from Siberia and is northwesterly due to the geostrophic deflection force.

In winter, the direct sun point moves south to the Tropic of Capricorn and then turns back to the north. At the beginning of winter, the Sun has reached 225 degrees of yellow longitude and the Earth is located at -16°19 declination'The height of the sun in the northern hemisphere has become smaller, the daylight hours have shortened, and the northern hemisphere has less and less radiation from the sun, but because the heat stored on the surface in the second half of the year still has a certain amount of energy, it is not very cold.

During the Mengdong (beginning of the winter solstice and light snow), when it is sunny and windless, there is often a "small spring" weather with a beautiful wind and sunshine, warm and comfortable, and there is a saying of "October Xiaoyangchun" in the folk. In some parts of the south, the early winter (Mengdong) is generally not very cold during this period, but as time goes on, the cold air frequently moves south, and the temperature gradually drops.

Most of China's coastal areas have southeast winds in summer and northwest winds in winter, and this prevailing wind direction that changes according to the seasons is called monsoon. With this shift in prevailing winds, it brings with it a distinctly different weather and climate, when the winter monsoon prevails, the air flows from the northwestern continent, when the air is cold and dry, with little precipitation; When the summer monsoon prevails, air currents flow over the southeastern ocean, when the air is warm and humid and precipitation increases. The monsoon phenomenon is most obvious in the world in the eastern and southern parts of Asia, so the southeast of China has become a strong monsoon area.

The wind direction of winter and summer here is almost opposite, for example, the northerly wind (including northwesterly, northerly and northeasterly) in Shanghai in January is 62, that is, 100 times the wind direction is observed, 62 times are northerly, and the southerly wind is 57 in July; The northerly wind in Guangzhou was 55 in January and 52 in July. The winter and summer monsoons cause different weather and climate characteristics, the most important and obvious being dry winters and rainy summers. Why is the monsoon particularly obvious in the southeast of China?

This starts with the cause of the monsoon. We know that the sea and land temperatures are different in winter and summer, with the sea being warmer than land in winter and colder than land in summer. The temperature is different, and the air pressure is also different.

In winter, the temperature is lower on the continent and the air pressure is higher, and the temperature on the ocean is higher and the air pressure is lower; In summer, on the contrary, the temperature is lower and the pressure is higher over the ocean, and the temperature is higher and the pressure is lower on the continent. Since there is a difference in air pressure between the sea and the land, the air has to flow from a place with high air pressure to a place with low air pressure, so there is a different wind direction between the sea and the land in winter and summer, from land to sea in winter and from sea to land in summer. The greater the difference in temperature between land and sea, the greater the difference in air pressure, and the stronger the monsoon.

In some parts of the world, the monsoon phenomenon is not significant, because the difference in temperature and pressure between land and sea in these places is not large, and it is masked by the original wind. The strong monsoon in southeast Asia is related to the geographical location and the situation on land and sea. Asia is a land mass connected to Europe, and it is almost connected to Africa.

Only separated by a Red Sea. To the east and south of this huge land is a vast ocean, and the difference in temperature and pressure between land and sea is great. In winter, there is a strong high pressure on the continent, and in summer it is controlled by a strong low pressure.

These centers of high and low pressure occur where the temperature difference between land and sea is greatest. Southeastern Asia is located between these high and low pressures, and the winter and summer monsoons are particularly prevalent.

Because it is said that the northeast wind is difficult to distinguish.

The winter monsoon is mainly in the northwest of our country and even in Siberia, Russia, these regions are cold and dry, so the winter monsoon is cold and dry.

The monsoon climate zone in Asia has northerly winds in winter and southerly winds in summer. Winter monsoon** is high in Mongolia and Siberia.

In the southeast of Eurasia, the high temperature of the continent in summer forms a low pressure, and the ocean is relatively high, and the wind direction blows southeast of the ocean. In winter, the continent is low and the ocean is relatively low, resulting in a monsoon phenomenon in which the northwest wind blows from the central part of the continent to the ocean.

In the northern interior, there is no large area of southeast winds, which are basically completely controlled by northwest winds. The southeast wind basically does not reach here, there are very few, and this is the territory controlled by the northwest.

In the south, especially along the coast, the southeasterly winds tend to be southeasterly in summer (when ocean currents make landfall) and northwest winds in winter (cold Siberian air drives straight in) in winter.

Answer: China's southeast coast is watery, the northwest area is mostly land, the specific heat capacity of water is larger, the specific heat capacity of land sand and gravel is small In summer, under the sun, water and sand and gravel also absorb heat, the temperature of water does not rise much, and the temperature of the air near the water surface does not rise much; The temperature of sand and gravel in the northwest region rises more, the air temperature near the ground is higher, the density of hot air is smaller and rises, and the cold air density in the southeast is greater and flows to the northwest to fill in, forming a southeast wind In winter, the land and sea also dissipate heat, and the temperature of sand and gravel on the land in the northwest decreases more, and the air temperature is lower; The temperature of the southeast ocean does not decrease much, and the temperature of the nearby air is higher, so that the hot air from the southeast rises, and the cold air from the northwest flows to the southeast to fill in, forming a northwest wind

I can't see the sun anymore. The wind is also strong!

China's summer monsoon mainly comes from the low-latitude Pacific Ocean, followed by the Indian Ocean, so China's summer monsoon is southerly. The summer monsoon comes from the ocean, and the air is warm and humid, bringing us abundant precipitation.

China's winter monsoon mainly comes from the Siberian and Mongolian plateaus at higher latitudes, so China's winter monsoon is northerly. The winter winds come from the continent and are cold and dry, with cold temperatures and little precipitation.

In winter, a cold high pressure forms in Siberia, Mongolia, and a low pressure forms over the Pacific Ocean. The wind of cold and high pressure blows to the low pressure, forming a northwest wind under the action of rotational deflection force. In the same way, the summer monsoon is formed in this way.

The summer monsoon is a southeasterly wind that blows from the Pacific Ocean to the coastal areas of our country.

The winter monsoon is a northwesterly wind that blows from Siberia, Mongolia to the interior of our country.

The air in summer is humid and hot, and the air conditioner sends out the wind cool and dry, so the human body feels very comfortable, but the winter air is different, the winter air is cold, but if the air conditioner blows out hot and dry wind at this time, it will feel particularly dry.

First of all, it is certain that there are definitely some different differences between them, the most important of which is that the airflow organization is different, and the effect of air supply will affect the direct feeling of the human body. The general air conditioner has uneven airflow, giving people the feeling that it is blowing all the time, which is very uncomfortable. But the air conditioner is better at this, with a high air outlet, a wide range, uniform airflow temperature, and a natural and comfortable feeling.

I think that's what you said feels more comfortable. In addition, the unique design of some advanced manufacturers will also enhance your feeling, such as Hitachi's VAM series, which uses a three-in-one temperature control technology, and the human body can hardly feel the slightest temperature fluctuation. This kind of air conditioning is more likely to increase what you call comfort.

If you think it's good, help adopt a :)

In summer, air conditioners can drive away humid air.

The most common failure points of the air conditioner not to refrigerate are:1The refrigerant in the air conditioning system leaks out, resulting in no refrigerant, so the air conditioner is not cooling.

Pressurize to check ** for leaks, if not, just fill up the cold coal. 2.If there is cold coal, check whether the compressor is working, and if it is not working, you need to check the air conditioner pressure switch, temperature control switch, and circuit problems.

3.Check whether the air conditioner dissipates heat and whether the fan is working; Check whether the condenser radiator of the air conditioner is too dirty, and the filter element is too dirty may also cause no refrigeration, so you need to replace the air conditioner filter.