What happens when 2 different air masses meet?
When two different air masses come into contact, they don't mix. They push against each other along a line called a front. When a warm air mass meets a cold air mass, the warm air rises since it is lighter. At high altitude it cools, and the water vapor it contains condenses.
What is the line where two air masses meet called?
Front: The boundary between two air masses of different density. When it does not move, it's called "stationary"; "warm" when warmer air replaces cooler air; "cold" when cooler air replaces warmer air.
What is converging of two air masses?
Convergence: When two air masses of the same temperature collide and neither is willing to go back down, the only way to go is up. As the name implies, the two winds converge and rise together in an updraft that often leads to cloud formation.
What is it called when two air masses meet and stop moving?
Stationary Fronts Sometimes two air masses stop moving when they meet. These stalled air masses create a stationary front. Such a front may bring clouds and precipitation to the same area for many days.
What happens when two air masses meet quizlet?
What happens when two air masses meet? When two air masses meet, they form a front, which is a boundary that separates two air masses of different properties. How is a warm front produced? A warm front forms when warm air moves into an area formerly covered by cooler air.
What happens when two air masses with large differences in pressure meet?
When two large air masses meet the boundary that separates them is called a front. … Since warm air is less dense and creates less air pressure it will rise cold air is denser and creates greater air pressure and so it will sink.
When two winds meet it is called?
Winds generally blow from high-pressure areas to low-pressure areas. The boundary between these two areas is called a front. The complex relationships between fronts cause different types of wind and weather patterns. Prevailing winds are winds that blow from a single direction over a specific area of the Earth.
Which two air masses meet at the polar fronts?
A polar front is an area where cold polar air mass meets warm tropical air masses. The line between these two air masses can be thousands of miles long.
What is a convergence of air?
Air moving in toward a center of low pressure or a trough is forced to rise, exhibiting a motion called convergence. Similarly, air moving outward from a ridge or center of high pressure descends, exhibiting divergence.
What happens when two air masses collide quizlet?
What happens when two air masses meet? When two air masses meet, they form a front, which is a boundary that separates two air masses of different properties. How is a warm front produced? A warm front forms when warm air moves into an area formerly covered by cooler air.
What is Frontogenesis and Frontolysis?
Frontogenesis refers to the initial formation of a surface front or frontal zone, while frontolysis is the dissipation or weakening of a front.
When two air masses meet they form a front which is a boundary that separates two air masses of different properties?
When two air masses meet together the boundary between the two is called a weather front. At a front the two air masses have different densities based on temperature and do not easily mix. One air mass is lifted above the other creating a low pressure zone. … Fronts are the main cause of stormy weather.
What happens when high and low pressure meet?
4:3610:09(Why series) Earth Science Episode 3 – High Air Pressure and Low Air …YouTube
What is mass convergence?
Mass convergence is found in areas where winds come together. As winds come together, mass builds up and therefore causes air to rise, creating an updraft. Convergence may occur due to topography or daytime heating, and can be especially strong along fronts and dry lines.
What happens when cold air and hot air meet?
0:225:06What happens when cold air meets warm air? – YouTubeYouTube
What is it called when a warm and cold fronts meet?
An occluded front forms when a cold front reaches a warm front, forcing all the warm air to rise to higher altitudes and the cold air is stratified near the ground.
What is divergence and convergence?
Divergence generally means two things are moving apart while convergence implies that two forces are moving together. In the world of economics, finance, and trading, divergence and convergence are terms used to describe the directional relationship of two trends, prices, or indicators.
What happens when two air masses with different properties meet quizlet?
What happens when two air masses meet? When two air masses meet, they form a front, which is a boundary that separates two air masses of different properties.
What is the meaning of frontolysis?
Definition of frontolysis : a process tending to destroy a meteorological front.
What is frontolysis in geography?
Frontolysis in meteorology, is the dissipation or weakening of an atmospheric front. In contrary to areas of "Frontogenesis", the areas where air masses diverge are called areas of frontolysis.
What forms a front between two air masses?
Weather fronts Weather fronts mark the boundary between two different air masses, which often have contrasting properties. For example, one air mass may be cold and dry and the other air mass may be relatively warm and moist. These differences produce a reaction (often a band of rain) in a zone known as a front.
What happens when a cold front and a warm front meet?
Occluded fronts An occluded front forms when a cold front reaches a warm front, forcing all the warm air to rise to higher altitudes and the cold air is stratified near the ground.
What happens when two low pressure systems collide?
The Fujiwhara effect, sometimes referred to as the Fujiwara effect, Fujiw(h)ara interaction or binary interaction, is a phenomenon that occurs when two nearby cyclonic vortices move around each other and close the distance between the circulations of their corresponding low-pressure areas.
What is converging air?
Convergence in a horizontal wind field indicates that more air is entering a given area than is leaving at that level. To compensate for the resulting "excess," vertical motion may result: upward forcing if convergence is at low levels, or downward forcing (subsidence) if convergence is at high levels.
What causes air convergence?
At the surface, low pressure systems have a counterclockwise rotation in the Northern Hemisphere, with the wind turning slightly inward towards the lowest pressure. This causes air to converge, or come together, at the center of the low near the ground. Since the converging air has nowhere else to go, it rises.
What happens when cold and warm air masses collide?
When a moving cold air mass meets a warm air mass, that is lighter, it tends to wedge below the latter, thus giving origin to a cold front. The warm air is forced upwards and its ascent causes the formation of clouds.
Where does air converge and diverge?
The level of nondivergence (LND) is so called because it rests beneath the upper levels of the troposphere, where a great deal of convergence or divergence of air flow takes place. This convergence and divergence is what helps to enhance or suppress the pressure systems moving along the surface.
What occluded front?
An Occluded Front forms when a warm air mass gets caught between two cold air masses. The warm air mass rises as the cool air masses push and meet in the middle. The temperature drops as the warm air mass is occluded, or “cut off,” from the ground and pushed upward.
What is frontogenesis and Frontolysis?
Frontogenesis refers to the initial formation of a surface front or frontal zone, while frontolysis is the dissipation or weakening of a front.
How fronts are formed?
Such a front is formed when a cold air mass replaces a warm air mass by advancing into it, and lifting it up, or when the pressure gradient is such that the warm air mass retreats and cold air mass advances. In such a situation, the transition zone between the two is a cold front.