Why is there a large temperature difference between day and night in summer in the northwest inland

The northwest inland has a temperate continental climate, with drought and little rain throughout the year.

In summer, the sky is clear during the day, the clouds are scarce (drought causes less moisture in the atmosphere), the solar radiation is weakened by the atmosphere, and the temperature rises rapidly;

At night, because of the sparse cloud cover and weak atmospheric inverse radiation, the ground continues to lose heat outward, and the temperature drops rapidly.

Therefore, there is a large temperature difference between day and night in the northwest inland (for example, Xinjiang: wear a cotton jacket in the morning, wear yarn in the afternoon, and eat watermelon around the stove).

China's northwest five provinces are deep inland, basically on 45n, due to the influence of precipitation and evaporation of sea and land thermal differences, and the special topography of three mountains and two basins in Xinjiang, temperate continental climate, and the influence of many deserts, so that the temperature difference between day and night in summer is large.

The higher the latitude, the greater the temperature difference between day and night.

The terrain is high, the upper atmosphere is weak, and the atmospheric inverse radiation is relatively weak.

Some are deserts, and the sand is smaller than the heat capacity of the land.

The northwest region of our country is far away from the ocean, it is a desert, and the specific heat capacity of sand is much smaller than that of water, so the temperature difference between day and night is large.

1.Underlying Surface Factors:

The northwest inland of China is far away from the ocean, and there is rarely a surface with sufficient moisture, and deserts account for most of it. The specific heat capacity of water is larger than that of sand, soil, etc., so the temperature difference between day and night in the northwest inland of China is large in summer, the sky above the ocean is small, and the area close to the ocean is also small.

2.Radiation and Radiation Absorption of Clouds:

During the day, the inland northwest receives solar radiation energy, and the temperature rises sharply (here, because the specific heat is small, the temperature rises rapidly); At night, there are fewer clouds in the sky, and the clouds can absorb the earth's long-wave radiation, which is an important factor in maintaining the earth's temperature from being too low, and the northwest inland has fewer clouds, and the ability to absorb long-wave radiation is weak, resulting in a sharp drop in temperature at night (this can be compared with the phenomenon on the moon: because there is no atmosphere on the moon, the temperature is very high during the day; At night there are no clouds to block the heat loss, and the temperature is as low as sub-freezing, resulting in a very large temperature difference between day and night).

3.Topography and environmental factors:

The special topography of three mountains and two basins belongs to the temperate continental climate.

The reason for the large temperature difference between north and south in winter in China and the general high temperature in summer is as follows: in winter, the higher the latitude, the shorter the day, and the smaller the solar height; the lower the latitude; The longer the day, the greater the height of the sun; Therefore, the lower the latitude, the richer the solar radiation energy received, and the stronger the influence of the northerly winter monsoon, so the temperature difference between the north and south in winter is large.

The large temperature difference between the north and south in winter in China is caused by the combined influence of the monsoon factors caused by latitude factors, topographic factors, and the difference in the thermal properties of sea and land.

1. The first is the latitude factor. The north-south span is large, and the difference in latitude directly leads to the difference in the altitude angle of the sun, and the heat distribution is uneven.

2. Consider the monsoon factor. The coastal zone is heavily influenced by the monsoon. Due to the difference in the nature of land and sea, the continent forms a cold high pressure while the Pacific Ocean forms a warm high pressure, which promotes the formation of the winter monsoon.

3. Another important factor is the topography. Often the cold air does not affect the south very deeply, that is, there are many east-west, northeast-southwest trending tall mountains, such as the Daxing'an Mountains, Yinshan Mountains, Helan Mountains and so on.

Reasons: 1. Northwest China is arid and rainless, the climate is dry, the ground storage energy is small, the temperature is low at night, the temperature is high during the day, and the temperature difference is large.

2. It mainly depends on latitude, altitude and sea and land location. Usually at higher latitudes, there is a large temperature difference between day and night.

3. High altitude and large temperature difference between day and night. Disturbance.

4. In the interior of the continent far from the ocean, the temperature difference between day and night is large.

5. It is not direct radiation from the ground, and the radiation from the ground is weak.

6. There are few clouds in the sky, and there is no strong thermal insulation effect after being exposed to ground radiation.

There is a large difference in temperature between the north and the south in winter, the south is warm, and the temperature is lower the further north you go

The north and south of China span a large latitude, and the direct sun is in the southern hemisphere in winter, and the further north you go in the northern hemisphere, the lower the solar altitude angle, and the less solar heat The south of China is more affected by solar heat due to its low latitude and large solar altitude angle;

The north of China is close to the birthplace of the winter monsoon, which is obviously affected by the winter monsoon and the cooling range is large, while the south of China is far away from the birthplace of the winter monsoon and is blocked by the tall mountains, the influence of the winter monsoon is not obvious, the cooling range is small, and the temperature is high

Why is there a big difference between the north and the south in winter in China? This is mainly because our territory is relatively vast, so the north and south cross several latitudes, so the further south and closer to the equator, the higher the temperature, and the further north closer to the Arctic Circle, the cooler it will be.

Answer: Water and dry mud of equal mass cover the soil, absorb (or release) the same heat, the specific heat capacity of water is large, the temperature change of water is small, and the temperature of dry soil changes greatly Therefore, in coastal areas, the sea absorbs a lot of heat during the day and the temperature does not rise much, and the sea water releases a lot of heat at night, and the temperature does not drop much In the inland areas, the temperature rises more in vain and the temperature decreases more at night, so the temperature difference between day and night in the coastal areas is smaller, and the temperature difference between day and night in the inland areas is larger

Reason: There is a large difference in latitude between the north and the south.

1. In winter, the temperature difference between the north and the south is large, the south is warm, and the temperature is lower the further north you go.

Because the Earth is a sphere, the solar altitude angle in the south is larger than in the north; In winter, the southern part of the country has longer daylight hours than the northern ones; The north is also close to the birthplace of the winter monsoon, so the temperature difference between the north and the south in China is large in winter, the south is warm, and the north is cold. In January, the 0 degree Celsius isotherm roughly passed through the Qinling-Huaihe line in China;

2. In summer, the whole country is generally hot, and the Qinghai-Tibet Plateau is the coolest place in China.

In summer, the direct sun point moves northward, the solar altitude angle in the north also increases, and the daylight time is longer than that in the south, the winter monsoon disappears, and the summer monsoon continuously sends heat, so the temperature in the north and south is generally higher. Only the Qinghai-Tibet Plateau and other high mountains and plateau areas, because of the high altitude, the temperature is low.

In summer, the direct point of the sun is located in the northern hemisphere, and the days are short in the southern part of China, and the sun height is high at noon. The northern regions have long days and a lower midday sun height, and the ground in the south receives slightly more heat than in the north, and the temperature is slightly higher than in the north. Therefore, the temperature difference between the north and south of China is small in summer.

Characteristics of temperature distribution in China: Because of the vast territory of China, there is a large difference in latitude between north and south. From the dark sand of Zengmu near the fourth degree north latitude to the center line of the main channel of the Heilongjiang River north of about 53 degrees north latitude and north of the Mohe River, the difference between north and south is about 50 degrees.

The Tropic of Cancer passes through the southern part of our country, so most of our country is located in the northern temperate zone, and a small part is located in the tropics, and there is no cold zone.

In winter, the temperature difference between north and south is large: in winter, the higher the sun altitude angle is smaller the north of the northern hemisphere, and the shorter the days and longer the nights. Therefore, compared with the north, the south not only has a larger solar altitude angle, but also has a longer sunshine time, more heat, and the temperature is much higher than that of the north. At the same time, the northern region is susceptible to the influence of the cold air of Mongolia and Siberia in winter, and the power of the cold air will gradually weaken in the process of moving south, and the south is not as affected by the cold wave as the north.

These two factors lead to a large temperature difference between the north and the south in winter.

Small north-south temperature difference in summer: In summer, the solar altitude angle in the Northern Hemisphere (north of the Tropic of Capricorn) is generally larger (although it is still smaller at higher latitudes), and the daylight hours are longer at higher latitudes. The solar altitude angle in the north is smaller than that in the south, but the sunshine time is longer than that in the south, and the heat difference between the north and the south is small.

Therefore, the temperature difference between north and south is not obvious in summer.

This is very closely related to China's geographical location and the different climatic characteristics of the north and south. To sum up, there are several main points:

1. China has a vast territory. The distance between the north and the south is long, and the geographical perspective is the low latitude in the south and the high latitude in the north, with a difference of more than 30 degrees. The sun shines directly over the southern hemisphere during the northern hemisphere winter, resulting in stronger solar radiation intensity and longer sunshine hours in the south than in the north, and higher temperatures.

This is due to the latitudinal position, which leads to different solar radiation.

In summer, the sun shines directly on the northern hemisphere, and although the radiation intensity in the south is still greater than that in the north, the sunshine hours in the north are longer than those in the south, so that the difference in solar radiation between the north and the south will not be as big as in winter. The difference in temperature is not so big.

2. In the north, affected by the cold and high pressure of Mongolia and Siberia in winter, cold air often moves south to form a cold wave, which greatly reduces the temperature. The south, on the other hand, is affected by warm and humid air currents from the ocean, and the winters are mostly mild. This is due to the climate.

3. The east-west mountains, such as the Qinling Mountains, block the southward movement of the cold air mass, making the temperature in the south high and the temperature in the north very low, and the temperature difference is naturally large. This is due to the terrain.

Under the combined effect of a number of geographical factors (solar radiation, climate, topography), the temperature difference between north and south in China is much larger in winter than in summer.