in how much time snowfall melt How does snowfall happen what does science say mausam update weather update – Explainer

Himachal Pradesh, This time snowfall has occurred very late in most of the hilly areas including Jammu and Kashmir. The plain areas continued to be colder than the hilly areas. Now in the last 24 hours, there has been heavy snowfall in some areas of Himachal Pradesh and Jammu and Kashmir. Due to this, normal life has become disrupted. The delayed and sudden snowfall has increased the problems of the people. Roads have been completely closed in some areas of Himachal Pradesh and Jammu and Kashmir. Amidst the trouble of untimely rain from the sky, do you know how snowfall occurs? Then how much time does it take for the ice to melt?

First of all let us understand how snowfall occurs? Actually, due to the heat of the sun, the water of oceans, lakes, rivers and ponds evaporates in the form of steam. The weight of steam becomes lighter than the air of the atmosphere. That’s why it keeps rising higher in the sky. After going up, this steam takes the form of a cloud according to the temperature there. When the temperature above is at the freezing point, this steam starts turning into ice. As soon as it turns into ice, it becomes heavy and starts falling downwards. While coming down, their size keeps increasing and decreasing. When there is strong wind, small snow-flakes collide with each other and scatter. For this reason, the level of snowfall varies in the same area.

Why does snow fall only in mountainous areas
The reason for snowfall occurring only in the hilly areas is due to the high altitude above sea level. Actually, there is more snowfall in places which are very high above sea level. The cold climate of hilly areas for most of the year also plays a big role in snowfall. Sometimes snow also falls on the earth in the form of hail. While coming down, the ice cubes pass through the ozone layer, where they melt due to high temperature. Then these fall in the hilly areas as snow flakes. In fact, due to the low temperature in the hilly areas, the melted snow turns into ice again. At the same time, in some areas it falls in the form of rain instead of snowflakes.

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For ice to form, the atmospheric temperature must be zero degrees Celsius or below.

Why is moisture in the atmosphere necessary for snowfall?
Science says that moisture in the atmosphere is very important for snowfall. Snow storms largely depend on temperature, but it is not necessary that it be the same temperature that we feel in the plains. For ice to form, the atmospheric temperature must be zero degrees Celsius or below. In the language of science, this temperature is called freezing point. If the ground temperature is at or below freezing, it will snow. However, if conditions are right, snow can fall even when the ground temperature is above zero. If this happens, the snow will melt as it comes down. Nevertheless, due to the cold environment, the steam formed due to melting then turns into snow and rains. After this, when snow falls, the melting rate reduces.

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Why does it not snow in some places even after it is very cold?
As a general rule, if the ground temperature is at least 5 degrees Celsius then snow will not form. This temperature is too hot for snow to fall. Most of the time heavy snowfall occurs when the air temperature near the ground is -9 degrees Celsius or more. Actually, cold air can hold more steam. Science says that snowfall requires moisture. Therefore, even when it is very cold, snowfall does not occur in dry areas. The Dry Valleys of Antarctica are the continent’s largest ice-free area. The dry valleys are quite cold, but have very little humidity. At the same time, strong winds also absorb the remaining moisture in the air. As a result, there is very little snowfall in this extremely cold region.

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Why is there different snowfall in different places?
The snow falling from the sky changes its color and shape according to the season and region. In simple language, changing weather affects the condition of snow. That is why at many places you will see cotton-like ice, while at other places it will be solid and transparent. The surface of the snow after snowfall is determined by the original form of the falling crystals and the weather conditions. When snowfall occurs with strong winds, the ice crystals break into small pieces. After snowfall, snow may melt or turn into steam or may persist for a long time. If snow remains on the ground, the structure of individual snowflakes will change even when the temperature of the snow remains below zero.

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The snow falling from the sky changes its color and shape according to the season and region.

What color does snow appear after snowfall?
Generally snow falls in white colour. In fact, most of the light that hits the surface of the ice is immediately reflected. Let us tell you that most natural things absorb some part of the sunlight. This is how they get their colour. At the same time, snow reflects a large part of the sunlight. That’s why it appears white. At some places, blue colored snow is also found. In fact, the photons emitted from the ice layer are composed more of blue light than of red. If you drill a hole in the ice and look through it, a blue color can be seen. At the same time, if snow falls on red moss then it will appear red. At the same time, the red ice in the Blood Falls of Taylor Glacier in Antarctica is due to the high amount of iron in the water there.

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How long does it take for the snow falling from the sky to melt?
Dust and other dark colored particles affect not only the color of the snow but also its shape and melting speed. If the color of the snow is dark due to particles, then it will absorb more sunlight. Some research says that if there is a layer of dust on the surface of the snowflake, the snow can melt in 21 to 51 days. At the same time, if the temperature increases by 2 to 4 degrees Celsius, the snow will melt 5 to 18 days earlier. The surface temperature of the snow is controlled by the air temperature. The colder the air, the colder the ice layers near the surface.

What role does wind play in melting ice?
The maximum effect of air temperature is greatest from the upper surface of the snow to a depth of 45 cm. If there has been a lot of snowfall then the snow near the ground becomes warmer in depth. Actually, the ground is warmer than the snow. The reason for this is that the heat accumulated inside the earth in summer does not dissipate in one go. It decreases at a very slow pace after snowfall. At the same time, ice is also an excellent insulator. Therefore, snow also slows down the flow of heat from the hot ground to the cold air above. Let us tell you that the snowpack we are talking about includes new snow that has fallen, previously lying snow and unmelted solid snow.

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