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Western Depression are the cyclones which originate in the Mediterranean Sea.
Depressions occur in regions where warm air masses meet cold air masses, creating a low-pressure system. This typically happens along the boundaries of large air masses, such as in the mid-latitudes. Depressions can bring stormy weather, including rain, strong winds, and sometimes thunderstorms.
Air that is warmer than the surrounding air will rise. Air that is cooler than the surrounding air will fall. Other than manmade and volcanic / fire action, the main heating mechanism of the air is the sun. Typically the sun will heat the ground and this will heat the air near it. Sunny ( daylight ) parts of the earth will have more rising air, There is no direct connection between static air pressure and air temp.
Heat can cause air to rise :)
Carbon Dioxide CO2 is the bubbles that rise in the air.
rise
Heat is the energy of the hot air. Therefore hot air rises
Western Air was created in 2001.
Buoyant air will rise until it reaches warmer air that is the same density as itself.
It is the warm air
Hot air is lighter than cold air, so cold air sinks and hot air rises; that makes the hot air balloon rise (if the air around the hot air balloon is heated as well, it won't rise, or sink if in the air).
It tends to rise because it is warm air