WALKING THROUGH THE FOG
I was born in Munger. It is a small district in Bihar, India surrounded by mountains. It is used to be the cleanest town in our state and one important thing about my hometown is its natural form.
It is covered by beautiful Neem trees, the animal can roam around freely, and you can roam around freely. During the winter season, the beauty of the town is enhanced by the covering of fog. Roads and bridges are covered by fog and it looks like a way to heaven. In my childhood, I was very curious about fog and always ask questions to my father about it and he used to tell me that it is a cloud created by God to protect our town from evils. I wish! my father was right. But as we know, it is a scientific process and we will discuss it.
Essentially fog is a cloud on the ground which reduces visibility to less than 1 km. It is a collection of liquid water droplets or ice crystals suspended in the air at or near the earth's surface.
Fog begins to form when water vapour condenses into tiny water droplets suspended in the air; wind convergence into areas of upward motion, precipitation or virga falling from above.
TYPES OF FOG
There are various types of fog.
This type of fog always found at ground level and varies in depth from 2 feet to about 1000 feet.
Radiation fog forms at night when the earth surface radiates heat and continues to cool provided a deep enough layer of moist air is present near the ground, the humidity will reach 100% and fog will form
This is basically a type of radiation fog and is very common near mountains during winter. Valley fog develops when mountains prevent the dense air from escaping.
UP SLOPE FOG
This type of fog usually forms a good distance from the peak of the hill or mountains and covers a large area. Upslope fog forms when light winds move moist air up the slope where air becomes saturated and condensation occur.
This type of fog occurs when the water droplets present in the air freezes and remain in the liquid state until they come into contact with a surface upon which they can freeze.
Advection is a process of transfer of heat or matter by the flow of a fluid, especially horizontally in the atmosphere or the sea. Advection fog may look like radiation fog but as radiation fog is a result of condensation, not advection, which is a horizontal movement of warm moist air over a cold surface.
Fog harvesting technology is an attempt to collect potable water from the fog and use it for agriculture and domestic use. It consists of single or double mesh net supported by two posts rising from the ground. They are placed perpendicular to the wind and capture water when fog sweeps through it and collected in a collector.
This technology is very effective and can provide an alternative source of fresh water in dry regions. According to the International Development Research Centre(1995), in addition to chile, Peru, and Ecuador, the areas with the most potential to include the Atlantic coast of southern Africa, china, eastern Yemen, Oman, Mexico, Kenya, and Sri Lanka.
Driving into dense fog is very dangerous, so always slow down your speed whenever you drive into dense fog. It could decrease the danger and allows you to the see the nearer car in front of you.
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