Why are desert nights very cold?

When the sun's heat and light shine into the desert, the sand particles on top of the desert absorb the heat and release the heat into the air. During the day, the solar radiation from the sand heates the air and causes the temperature to rise. However, at night, most of the heat in the sand quickly dissipates into the air, and there is no sunlight to heat it up, causing the sand and its surroundings to become colder than before.

However, this phenomenon alone does not explain the severe drop in temperature. The main reason for the drastic change in temperature is that the air in the desert is very dry.

In arid deserts such as the Sahara and Atacama deserts in Chile, where humidity – the amount of water vapor in the air – is almost zero, and unlike sand, water has a tremendous ability to store heat. Water vapor in the air acts like an invisible giant blanket that keeps the heat near the ground and prevents it from spreading into the atmosphere. Air with high humidity also requires more energy to heat, which means more time to dissipate that energy and cool the surrounding environment.

As a result, the lack of moisture in the desert allows these arid places to heat up quickly, but also to cool down quickly.

It is because at night, all the heat in the environment is dissipated, so the temperature drops, because the sand is relatively small, so the heat absorption speed is relatively fast, and then the heat release speed is also relatively fast, the climate of the desert is generally drier, and the temperature at night is super low.

This is because the specific heat capacity of the desert is very small, and the temperature of the sand drops relatively low at night, and it feels very cold.

In the Sahara Desert, for example, the average temperature in the Sahara Desert is close to 40 degrees Celsius during the day and can reach minus 4 degrees Celsius at night. The main reason for the rapid change in the temperature of the desert is the sand and humidity in the desert.

In the Sahara Desert, for example, the average temperature during the day is close to 40 degrees Celsius, but it can reach minus 4 degrees Celsius at night. When night falls, there is an extreme temperature difference between day and night in the desert. The sand and moisture in the desert are the main reasons for the rapid change in desert temperature.

Take the Sahara Desert, for example. The average temperature in the Sahara Desert during the day is close to 40, but can reach -4 at night. When night comes, the temperature difference between day and night in the desert can be very large. The main reason for the rapid change in temperature in the desert is the sand and humidity in the desert.

The desert night is quiet.

Endless golden sand dunes.

The outline is blurred in the night.

Rampage buggy.

The clamor also stopped.

But the stars in the sky are not too tired.

Flashing in the deep blue of the night.

The desert night is also lively.

After a day's trek, the traveler is still energetic.

Get into your tent sleeping bag early.

It's boring and boring.

So the bonfire party became the best place to go.

After all, there is a lively singing and dancing.

It's the best way to spend a desert night.

As a traditional celebratory ritual.

Bonfires have a long history.

Back in ancient times.

It was discovered that fire could not only cook food.

It can also be used for heating and lighting, and to repel wild animals and mosquitoes.

Whenever you go out hunting and come home with a full load.

People will be in the evening.

Light a campfire and bake food.

To express excitement and joy.

They also sing and dance hand in hand around the fire.

Gradually, today's bonfires were formed.

Come to the Tengger Desert.

Enjoy the majestic and vast desert scenery.

Naturally, you can't miss it.

There are two main reasons: first, the desert has a small heat capacity, and it absorbs heat quickly and heats up quickly during the day; At night, it heats up quickly and cools down quickly. Second, there are few clouds in the desert, and the sun can scorch the desert unobstructed during the day, and the temperature rises sharply; At night, inverse radiation is almost non-existent, does not play a role in heat preservation, and the temperature continues to drop.

When it comes to the desert, many people will immediately think of Xinjiang, and there is a popular proverb in Xinjiang, "Wear a cotton jacket in the morning and yarn in the afternoon, and eat watermelon around the stove", from this proverb, you can feel how big the temperature difference between morning and evening in the desert of Xinjiang is. Every time the desert is mentioned, everyone's inherent impression is that in addition to drought and lack of rain, there is a huge temperature difference between day and night in the desert area. The desert is still steaming during the day, but once it reaches night, it cools down rapidly, and the heat of the day is gone.

The large temperature difference between day and night in the desert has also become a "roadblock" for many explorers to challenge their limits.

First of all, the phenomenon of hot during the day and cold at night in the desert is inseparable from the sand and rocks in the desert. Because the specific heat of sand and gravel is smaller than that of air, when the earth's surface absorbs the sun's radiant heat during the day, the temperature of the air near the ground is higher than that of the air of equal mass, and the heat transfer is transferred from sand and gravel to the air. At the same time, because the specific heat of sand and gravel is small, the heat absorption of sand and gravel rises rapidly, so that the air near the ground also heats up rapidly (air convection, which makes the air in the desert area heat up rapidly); At night, the earth's surface radiates heat to the air, and the air is convection, and the sand and gravel exchange heat with the cold air near the ground, and the sand and gravel are transferred to the air into cooling.

This phenomenon is evident in some parts of China's Xinjiang. Because the local ground landscape is mainly desert and the heat capacity is small, it absorbs heat quickly and heats up quickly during the day; At night, it is fast to heat out and cool down quickly.

There are also meteorological factors that cause the desert to be hot during the day and cold at night. In our daily lives, the cloud is very common. It is a visible polymer floating in the air composed of small water droplets or small Xiaoice crystals condensed by the liquefaction of water vapor in the atmosphere when cold.

In nature, clouds have a role that cannot be ignored, for example, clouds can both "shade" and "keep warm". In other words, clouds can weaken the radiation of sunlight to the ground through reflection, and can also transfer heat to the ground through reverse radiation, that is, to keep the ground warm. However, the desert area is extremely arid and does not evaporate much water vapor, so there are very few clouds over the desert.

During the day, the sun can scorch the desert unobstructed, causing the temperature to rise sharply, so the desert is hot during the day; When night falls, the sun sets in the west, the ground radiation becomes dominant, and the ground continuously releases heat into the air, but there are few clouds over the desert, and the reverse radiation almost does not exist, so it does not play a role in heat preservation, so the temperature continues to drop, so the desert is cold at night.

First of all, the phenomenon of hot during the day and cold at night in the desert is inseparable from the sand in the desert. Since the specific heat of sand and gravel is less than that of air, when the earth's surface absorbs solar radiation heat during the day, the temperature of the same mass of sand and gravel is higher than the temperature of the air near the ground, and the heat is transferred from the sand to the air. At the same time, since the specific heat of the sand is small, the sand absorbs the heat and heats up quickly, which makes the air near the ground also heat up quickly; At night, the earth's surface dissipates heat to the air, air convection, and sand and stones exchange heat with cold air near the ground, and sand and stones are transferred to the air for cooling.

This phenomenon is evident in some parts of Xinjiang, China. Since the local surface landscape is mainly a desert with a small heat capacity, it absorbs heat quickly and heats up quickly during the day. At night, it quickly releases heat and cools down quickly.

This is also the reason why the proverb "wear a cotton jacket in the morning, gauze at noon, and eat watermelon around the stove" is popular in Xinjiang. Due to meteorological factors, the desert is hot during the day and cold at night. The cloud is common in our daily lives.

It is a visible polymer floating in the air and is made up of small water droplets or Xiaoice Xiaoice crystals that are formed by the condensation of water vapor from the atmosphere when cold. In nature, clouds play an important role. For example, clouds can "block out the sun" and "keep warm".

In other words, clouds can weaken the radiation of sunlight to the ground through reflection, or they can transfer heat to the ground through reverse radiation, i.e., keep the ground warm. However, desert areas are very dry and there is not much water vapor evaporated, so there are almost no clouds above the desert. During the day, the sun can bake the desert without hindrance, causing the temperature to rise sharply, so the desert is hot during the day.

When night falls, the sun sets in the west, and ground radiation dominates. The ground is constantly releasing heat into the air. However, the desert has almost no clouds and inverse radiation is almost non-existent, so it cannot keep warm.

As a result, the temperature continues to drop and the desert gets colder at night.

It is mainly caused by two reasons: first, the desert has a small heat capacity, and it absorbs heat quickly and warms up quickly during the day; At night, it heats up quickly and cools down quickly. Second, there are few desert clouds, and the sunlight can scorch the desert unobstructed during the day, and the temperature rises sharply; At night, inverse radiation is almost non-existent, does not play a role in heat preservation, and the temperature continues to drop.

During the day, when the sun is very strong, the sand accumulates a lot of heat, because his specific heat capacity is small, so his temperature rises a lot, so the desert is very hot during the day. But at night, as the temperature drops, the sand will quickly release its heat, and then the temperature will drop quickly.

Why is the desert hot in the morning and cold at night?

I think it's possible that because of the sand, there is the sun during the day, while the desert only has sand, and the sand absorbs the temperature of the sun and emits it out, and there is no cooling of water, so it is very hot during the day.

At night, when there is no sun, the sand will quickly disperse the temperature, so I think it will feel cold at night.

Hello, because of the difference between morning and evening, temperature humidity and demeanor of these problems.

Sand conducts heat quickly, but it can't store heat, so the sun is exposed to the sun and heats up quickly, but it can't retain heat. Without the sun, the heat dissipates quickly and cools down quickly.

Every time the desert is mentioned, everyone has an inherent impression that apart from drought and little rainfall, there is a large temperature difference between day and night in desert areas. During the day, it's still a hot desert. Once it is at night, it will cool down quickly, and the large temperature difference between day and night in the desert has become a "roadblock" for many explorers to challenge their limits.

So, what's the secret behind the phenomenon of hot during the day and cold at night in the desert? First of all, the phenomenon of the desert being hot during the day and cold at night.

When we think of deserts, it's natural to think of heat, aridity, barren land, and lifeless life, but they are much more than that, and in some ways life in the desert is quite abundant.

Deserts cover 20% of the Earth's surface, and since most of the world's land mass is located in the Northern Hemisphere, most of the deserts are also located in the Northern Hemisphere compared to the Southern Hemisphere. Deserts are not scattered randomly on the earth, but are mainly located in two discontinuous zones in the windless zone of the Tropic of Capricorn.

In fact, the desert is not only hot, it can also be cold. The Sahara Desert is the largest desert in the world, and the largest "hot" desert, while Antarctica is the largest "cold" desert in the world.

Do you know why the desert is so hot and dry?

When substances come into contact with heat, their temperature increases, but different types of substances react differently to heat. We all know that deserts have less water and more sand, and sand and rocks heat up faster than water. What is involved is the specific heat capacity, which is the amount of heat that must be applied to raise the temperature of a substance by 1 degree Celsius.

The specific heat capacity of water is, while the specific heat capacity of sand and other rocks is. So, you can imagine how fast the desert is heating up compared to any large body of water around it.

On the other hand, the reason why the desert is so hot is also due to the lack of water. When the sun shines on the ground, all the absorbed sunlight is used to raise the temperature of the ground. If there is moisture in the soil, most of the heat is used to evaporate the water, which keeps the ground at a lower temperature.

Due to the lack of water in the desert, the evaporation process is reduced. Due to the lack of evaporative cooling processes, the lack of vegetation to take advantage of sunlight, and the lack of clouds that reflect sunlight, most of the sunlight is used to heat the surface.

How does the desert get cold at night?

No matter how hot the day is, the temperature in the desert usually plummets at night. This is a very striking change. This is because sand and rocks lose heat very quickly.

In other words, the desert is hot when there is sun during the day, but once the sun starts to set, the desert area quickly loses heat and gets cold at night.

Due to the harsh environment of the desert, we humans rarely set foot in it, and occasional trips can also allow people to experience unique exotic customs. After all, the miracles of nature never disappoint.