When hot and cold air meet, the warm air rises above the cool air, creating a low pressure zone. Warm air tends to cool as it reaches higher elevations, with the liquid in it condensing and forming clouds and rain. Cool air rushes in to fill the low pressure zone, pushing more warm air up and creating a cycle that can result in high winds and storms.Know More
The area where a warm and cold air mass meets is called a front. The severity of weather conditions at a front is determined by the direction of the cold and warm air movement. When warm air is on the move and it collides with a stationary cold air mass, the warm air rises gradually, forming drizzle and light rain. If cold air collides with a stationary warm air mass, the results are more severe. The cold air forces the warm air mass up quickly, creating large, sometimes violent thunderstorms with torrential rains. The air masses must reach equilibrium before the storm can dissipate, allowing clearer skies to prevail.
Warm and cold air masses are caused by uneven heating of the Earth by the sun. Colder air masses originate at the poles, with warmer air masses forming in the tropics.Learn more about Atmosphere
The meeting of the northwest trade winds with the southwest trade winds causes a band of low pressure along the equator, which is known as the Intertropical convergence zone. In this area, solar heating causes the air to rise, leading to precipitation.Full Answer >
The weight that the atmosphere exerts as it pushes downward causes atmospheric pressure. This pressure in the Earth's atmosphere affects the weather.Full Answer >
Air pressure changes with altitude because of issues related to gravity. Molecules have more weight the closer they are to the Earth and more of them move to lower elevations as a result; this causes increased pressure because there are more molecules in number and proximity. Conversely, air at higher elevations has less weight, but also forces pressure on those layers below it, resulting in the molecules closer to the Earth supporting more weight, increasing the pressure.Full Answer >
A barometer is the scientific instrument used by meteorologists to measure atmospheric pressure. There are three main types of barometers: mercury, aneroid and digital barometers.Full Answer >