Aerial term Air depression

Written By مهند فاخوري on 2023/10/09

This article was written originally in Arabic and is translated using a 3rd party automated service. ArabiaWeather is not responsible for any grammatical errors whatsoever.

Arabia Weather - Atmospheric pressure is the weight of the air column affecting a unit area, and it extends vertically from sea level to the end of the atmosphere. There are different air pressure systems such as air depressions and air highs, and this depends on the amount and value of the air pressure in the center of each of them. If The air pressure in the center is low, and increases as we move away from it, it is called an air depression. If the air pressure is as high as possible in the center, and decreases as we move away from it, it is called an air high.

 

What is a depression and how is it formed?

 

 

An air depression is a closed area with equal lines of pressure, where the lowest value of air pressure is in the center, as a result of the decrease in the weight of air masses resulting from an increase in their temperature. The value of air pressure increases as we move away from the center. The wind direction around the center of the air depression is counterclockwise in The Northern Hemisphere, and vice versa in the Southern Hemisphere, and the depression is symbolized by the letter “ L ”.

The decrease in pressure coincides with lighter air, so it rises to the upper layers of the atmosphere, and rotates around the center of the depression in a counterclockwise direction in the northern hemisphere and clockwise in the southern hemisphere. When the air rises and cools, its water vapor content condenses, and clouds are formed. Mostly, a depression is accompanied by rain, strong winds, and low temperatures.

For example, when a hot, humid tropical front meets a cold, dry polar front, the hot air forms something like a tongue under the cold air, raising it upward, as it is lighter. Consequently, the air pressure in this region decreases, so the air cools and water vapor condenses, then clouds are formed. .

 

Types of weather depressions

 

 

 

 

This article was written originally in Arabic and is translated using a 3rd party automated service. ArabiaWeather is not responsible for any grammatical errors whatsoever.


Browse on the official website



On World Television Day... How have weather forecasts evolved over time?Al-Zaqaq: Winter signs begin late at night during the Wasm season and cover the entire night during Al-Murabba’aniyah.What is the Siberian High and how does it affect the weather as it first extends over the region?The coming Siberian cold wave will include Gaza, and the weather will be very cold, especially at night, next weekIraq | Low pressure in the northern regions followed by a very cold Siberian wave in the middle of the week (details)Arab World | A high pressure system in the western Mediterranean and a cold air mass of polar origin affect the eastern Mediterranean for several daysEgypt | A noticeable drop in temperatures and strong winds as a cold air mass approaches the countryJordan | Stable autumn weather on Saturday and continued cold weather at nightTürkiye is set to witness an exceptional snow wave, with temperatures dropping to 10 degrees below zero in some areas.