How does rain and snow form? How does frost and dew form?
In nature, there are many physical and geographical phenomena, due to various reasons. These phenomena include the following natural processes. All of them are interconnected with continuous evaporation of water from the surface of seas, lakes, rivers, oceans and other bodies of water. For more information on how dew, frost, rain and snow is formed, you can find out by reading this article.
General information: factors affecting the weather
In different parts of the planet Earth, the humidity of the air is not the same due to differences in climate and the distribution of volumes of inland waters. For example, above the surface of the seas of the equatorial humidity is the highest, and above the arid deserts it is very low. Although the air content of water vapor is low (not even visible), it is he who determines the conditions of the weather.
Before we learn how to form rain, it is worth noting that, in addition to evaporation, another important role is played by condensation. It occurs in nature in different ways: the formation of dew or frost, rain or snow.
Snow, like rain, is the end result of the below described chain of natural processes. And in order to make it clear what happens in nature with such phenomena, one should first turn to physical laws.
How is dew, frost, rain formed? Their occurrence is interrelated processes. First, find out how the dew is formed. You can see it only in the early morning. Where does it come from?
Water evaporates from the surface of water bodies, rivers, lakes and even plants on a hot summer day. When the temperature falls (at night), it can reach such values at which water vapor becomes saturated. This is the dew point. At that time, saturated steam condenses and settles on the soil and on the leaves of plants. Dew can be seen only in the early morning, then it evaporates again under the influence of sunlight.
Further, we will describe in more detail how frost, rain, and snow form.
The origin of frost
The formation of frost is similar to the formation of dew, but there is one difference. Frost occurs only in the cold season (late autumn and winter).
Frost is an uneven and very thin layer of ice crystals,formed in the process of sublimation of water vapor from air on grass, soil and other terrestrial objects at negative temperatures (lower than air temperature).
Moreover, depending on the temperature, the crystals have a different shape: with weak frosts, the crystals are usually in the form of hexagonal prisms, with moderate ones - in the form of plates, and in case of strong frosts - in the form of blunt needles. The most favorable conditions for the origin of this process are quiet, peaceful nights and rough surfaces with low conductivity temperature. Strong wind is an obstacle to the occurrence of frost, and weak, on the contrary, contributes to its formation, as it increases the contact with the cold surface of all large masses of moist air.
Often in fiction and popularly hoarfrost frost is called crystalline frost. And not to be confused, we must remember that on the thread-like surfaces, frost is usually not formed.
Like dew, it can be observed only in the morning due to the fact that the night is usually much colder than the day.
How does rain and snow form?
Precipitation is of no small importance in nature (in the water cycle) and in the lives of numerous animals and plants. They are formed as follows.Water evaporates in large quantities from the surfaces of numerous natural reservoirs and rises several thousand meters upwards, where the temperature is lower. There, the steam is condensed and transformed into the smallest drops, subsequently chaotically flying in the atmosphere. Huge volumes of such droplets represent clouds that, under the influence of air masses, are transported over incredibly long distances (up to several thousand kilometers).
Facing each other in the process of such a long movement, they turn into larger drops, which then fall to the ground in the form of the same rain. Now I understand how rain is formed.
And snow arises in the same way, but only in the cold season, when at a height such temperature (less than zero), at which the steam condenses. As a result, it forms not water drops, but ice crystals.
On the intensity of rain
How is the rain, clear and clear. Now for the drops. Equal-shaped raindrops can change their size from 0.5 millimeter to 6 millimeters in diameter. They fly from a great height, breaking on the ground into many tiny drops.
If they do not correspond to the above parameters, then the drops are drizzle.
To a large extent, the intensity of rain depends on the regions, since in a hotter climate the earth's surface heats up more and more rapidly, which contributes to the emergence of a more powerful stream of water vapor, which subsequently rises to the atmosphere.
The most curious process in all these described phenomena is how rain forms. It is surprising that under the influence of air currents, these small drops are transported over considerable distances, overcoming thousands and thousands of kilometers. It turns out that the beginning of this continuous chain and its end can be located at fairly large distances between them.
The formation of both frost and dew, as well as snow and rain are curious geographic and physical phenomena, which are explained from each point of view in different ways.
The main thing is that any precipitation plays an important role in the endless cycle of water and in the life of all living things that exist on the planet.