Why doesn t the northeast wind blow in the northwest of China in winter?

Just because it is inland, there are three mountains and two basins, and the cold air in Siberia changes direction after being blocked by the Altai Mountains, Qilian Mountains and other large mountain ranges, and the northeast wind cannot be formed, and the southwest and southeast monsoon can not blow

10) Chinese mainland has a temperate continental climate. The continental climate is very simple, that is, the heat storage is relatively poor, and when the sun shines, the temperature rises quickly. So it's hot in the summer.

But in winter, when the sun shines directly on the southern hemisphere, the continent of the northern hemisphere is completely cold. Temperate is better explained, between the tropics and the cold zone, if compared with the tropical continental climate, the cold continental climate is not too hot and cold. The above is understood, and the temperate oceanic climate is also easy to understand.

It is because of the heat storage effect of seawater, so the climate change is not much, it is not very cold when it is cold, it is not very hot when it is hot, and there is water, so it is relatively humid. The temperate monsoon climate is the central and eastern part of China. The summer wind blows from the ocean to the land, do you know why?

Because the Eurasian continent is too large, the land is heated relatively quickly, causing the tropospheric air connected to it to heat up relatively quickly, the higher the temperature, the smaller the gas density, and the lower the air pressure, so the continental air pressure is low. The Pacific Ocean heats up more slowly, so there is a high pressure above it, so the wind blows from the ocean to the land. In winter, not anymore.

The continents cool quickly and the air pressure becomes high, while the oceans cool slowly and the air pressure is relatively low, so the wind blows from the land to the ocean. The east wind and the west wind alternate throughout the year, so it is called the monsoon. Another Chinese mainland inland monsoon can not blow, because China's latitude is just under the control of the westerly wind belt, because of the effect of the earth's rotation, that is to say, as long as it is a large piece of land such as the Eurasian continent, and a large ocean such as the Pacific Ocean, in the westerly wind belt will blow the west wind.

Monsoons occur only where land and sea meet, such as in South Asia, which is affected by monsoons like China.

Northeast China is the northern region of China's interior, adjacent to the Far East in the northeast and North China in the southwest, and is in the interior of the Asian continent. In winter, the westerly wind belt in the middle and high latitudes moves southward, accompanied by the activity of the Arctic front and front, and the cold air moves southward, forming a northerly wind flow and easterly airflow. Since the Tohoku region is located at the turn of the north and the east, it is easy to be affected by easterly winds in winter, resulting in the prevailing northeasterly winds.

2.Affected by monsoon climate: The Northeast region is affected by the monsoon climate, with obvious seasonal wind directions, and winter is a period when northerly and easterly winds dominate.

The easterly winds mainly occur in summer and winter, the summer is affected by the tropical monsoon, and the winter is affected by the Siberian cold high pressure, and the cold air and dry air brought by the easterly airflow make the temperature in the northeast very low and the relative humidity is very low. 3.Topographic influences:

The terrain in the northeast is undulating, with many mountains and little water. After passing through the Inner Mongolia Plateau, the Siberian cold air mass glides to the lower altitude of the Northeast Plain, where the cold air disturbs and sinks, and it is easy to form an air flow that prevails in the northeast wind. In addition, the Northeast region has a long coastline and low sea temperature, and in winter, it is often attacked by cold air from the sea, and the air flow blows from the sea to the land, which is prone to form the climate characteristics of the prevailing northeast wind.

To sum up, the reason why the northeast wind prevails in winter in the Northeast is due to its geographical location, monsoon climate.

The eastern part of our countryMonsoon climateThe main cause is the difference in thermal properties between land and sea. Because of the high and low temperatures, the pressure difference in the atmosphere in different geographical locations is high, and the pressure of cold air is high, and the pressure of hot air is small. The air flow then flows from a place with a high pressure to a place with low pressure, thus forming a wind.

The so-called winter monsoon is a seasonal air movement. Another point is that the specific heat capacity of the land is smaller than that of the sea level, so in winter, the relative sea level temperature is low, so the air flows from the continent to the ocean.

Time of occurrence. It generally affects northern China in early September.

It was only in mid-October when it was fully established in East Asia, when the atmospheric circulation in the Northern Hemisphere also abruptly changed from summer to winter, and the summer monsoon completely withdrew and winter began.

The winter monsoon phenomenon in East Asia is the most typical, with stronger winds than summer monsoons. The prevailing wind direction is northwesterly in North China and northern and central Japan, south of the Yellow River and the Indochina Peninsula in China.

Peninsular India and southern Japan and Okinawa.

It is a northeasterly wind. Bringing dry and cold continental air masses, when strongly developing, brings cold wave weather, and the temperature drops sharply. However, when the winter monsoon reaches the south of the Yangtze River and the Japanese archipelago in China, the cold air flows over the sea, causing air mass degeneration, which will cause rain and snow.

Because the temperature in the winter ocean is higher in our country than on land. Whereas, the air flow is always in the direction of the cold air towards the hot air. As a result, winter winds always blow from the land to the ocean to the southeast. So in winter there is a northwesterly wind.

In areas where the sea is located in the north (such as Tianjin), it is easy to blow northerly winds in winter, and the reason for this starts with the formation of wind. Wind is formed by the flow of air, and on the ground it flows from low to high, which is what we usually call the direction of the wind.

In winter, the ocean current in the sea also changes greatly compared with summer, mostly cold currents, due to the temperature difference between the ground and the sea surface formed by the cold current, the formation of a cold wind, at this time the temperature of the sea surface is much lower than the ground, the formation of the wind is blowing to the land, that is, the north wind.

It is the cold air of Siberia that goes south, blowing the north wind, and the air flow forms the wind, and the south is warm, and the north is cold, and the cold and warm air has to be convection, so the north wind will blow. The Siberian high often invades our country under the guidance of high air currents. From autumn to winter, the area of influence gradually expands from north to south.

The Siberian high-pressure front, which is strong in winter, should affect the South China Sea, the Philippines and the Ryukyu Islands.

In winter, most of our country is affected by the Siberian high pressure, due to the existence of the pressure gradient force, the atmosphere flows from high pressure to low pressure, and the Siberian region is in the north of our country, so the wind blows from the north, coupled with the effect of the geostrophic deflection force, it deviates to the right along the direction of the wind, so it will form a northwest wind.

Reason: The famous Mongolian-Siberian high is also known as the "Asian high" or "Siberian high". This difference in land and sea thermal forces is formed as a result of a semi-permanent cold high in Mongolia-Siberia.

Mongolia-Siberia is the coldest place in the Northern Hemisphere in winter, and the atmosphere cools and contracts to sink, forming the strongest and most extensive high pressure in the Northern Hemisphere. The center of the high pressure is located in the Siberian and Mongolian high pressure area, and it moves to the east in winter and spring, and the weather in the area controlled by this high pressure is sunny and cold.

Its high-pressure ridge often extends to the north of our country, and the strong cold northwest airflow often forms cold wave weather when it moves southward, so it is usually called the Siberian cold current.

It depends on where it is. In China, the northwesterly wind originates from the Siberian high. The northwest wind is colder.

In some parts of China, the north wind blows in winter, the northwest wind comes from Siberia, that is, the inland, and the northeast wind comes from the Pacific Ocean, that is, the ocean. The land temperature is lower than the ocean temperature when the winter is closed, so the northwest wind will be colder than the northeast wind.