Cold fronts are formed when air masses that consist of cooler heavier air move in to displace warmer air. An air mass is a large body of air that shares a relatively uniform temperature and level of humidity. Fronts are the atmospheric boundaries between two air masses.Know More
Cold air masses are formed above polar regions and areas that have relatively low surface temperatures. Air masses can shift and move depending on the influence of wind patterns, changes in atmospheric density and even the earth's rotation. Frontal systems occur when an air mass of different temperature, density and humidity moves into a region to displace an existing air mass.
Cold fronts often produce precipitation, especially when displacing an air mass of greater humidity. Water vapor within a warm air mass is condensed by the colder heavier air contained within a frontal system until rain or frozen precipitation begins to form. Cold fronts often trigger thunderstorms and may produce severe weather, especially when there is a large temperature and humidify difference between the air mass that is being displaced. Cold fronts can bring about rapid temperature changes because they have a steep slope which causes the air in front of them to be forced upwards along the leading edge.Learn more about Atmosphere
Thunderstorms originate in cumulonimbus clouds. Warm, humid air rises then cools, creating moisture to form the cloud. Thunderstorms produce heavy rain, strong winds and sometimes hail.Full Answer >
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.Full Answer >
The weather phenomenon known as El Niño is caused by weakened trade winds over the Pacific Ocean. Normally, warm water is pushed to the western Pacific Ocean by the trade winds, causing cold water to rise in the eastern Pacific Ocean. Weakened winds inhibit this, causing an El Niño event.Full Answer >
A tropical cyclone occurs when calm, warm seas provide heat and moisture to surface air, causing it to rise into the stratosphere. As the air cools, it deposits moisture and falls, creating a convection current. This cyclical air current begins to rotate, absorbing more energy and becoming a powerful storm.Full Answer >