The region where we do not find air is space.
A low pressure region should mean that the region is low in air. The air from the surrounding region (which is comparatively at higher pressure) moves into this low pressure region creating a wind. So, wind is the movement of air from a high pressure region into a low pressure region. Warm air is lighter than cold air. Warm air being lighter moves upward creating a low pressure region. So, wind could also be a movement of air from cooler to warmer region.
An airshed is the air supply of an individual region, or the region supplied by a source of air.
When air pressure is constant throughout a region of the atmosphere the region is in a state is called equilibrium.
Air Mass or equlibrium
Air travels from a hot region to a cold region in a direction from high pressure to low pressure.
An air shed is the air supply of a specific region.
The characteristics of an air mass are heavily influenced by its source region. The temperature, humidity, and stability of an air mass are reflective of the conditions prevalent in its source region. For example, an air mass originating from a tropical ocean region will be warm, moist, and unstable, while an air mass from a polar continental region will be cold, dry, and stable.
Los Angeles Air Defense Region was created in 1942.
San Francisco Air Defense Region was created in 1942.
San Francisco Air Defense Region ended in 1945.
When warm air moves into a region occupied by cold air, the warm air will rise above the cold air due to its lower density. This results in the cold air being displaced and pushed out of the region, a process known as warm air advection. This movement can lead to changes in temperature, pressure, and weather patterns in the region.
if you bought it from the same region your in its the same. if not find out where you got it then tell me and i will give you the region