What happens to moist air as it rises over mountains?
The orographic effect occurs when air masses are forced to flow over high topography. As air rises over mountains, it cools and water vapor condenses. As a result, it is common for rain to be concentrated on the windward side of mountains, and for rainfall to increase with elevation in the direction of storm tracks.
What happens when warm and moist air rises in altitude and then cools?
If warm moist air rises, it will expand and cool. As it cools, the relative humidity will increase and water will condense. It can then fall back to the earth as precipitation. As air rises, it expands because there is less atmospheric pressure at higher altitudes.
What happens to the air as it rises?
Rising air expands and cools (adiabatic cooling: that is, it cools due to change in volume as opposed to adding or taking away of heat). The result is condensation/precipitation. Cold air sinks.
Is it usually warmer or colder at high elevations?
High-altitude locations are usually much colder than areas closer to sea level. This is due to the low air pressure. Air expands as it rises, and the fewer gas molecules—including nitrogen, oxygen, and carbon dioxide—have fewer chances to bump into each other.
Does warm air rise or sink?
Hot air rises because it is less dense than cold air, so air will rise above a heater and sink near a cold window. Forced convection refers to fluids being pushed around by outside forces.
What causes the temperature of the air to change?
The temperature of the air is caused by the combination of air, water, and land working together. Those three factors heat and cool areas at different rates. Temperature also varies by the time of day, the season, or even the year. When weather people talk about temperature, they are talking about a mean temperature.
What is often found where warm air is moving down a mountain?
Warm moist air rises over the windward side of the mountains, it cools and contracts, when the air sinks on the leeward side of the mountains it forms a high pressure zone. When an air mass moves from a low elevation to a high elevation, it expands and cools.
Why does a warm front usually bring a light and steady rain?
Warm air rides along the front (up and over the cold air mass), cooling as it rises, producing clouds and precipitation in advance of the surface warm front. Because the lifting is very gradual and steady, generally wide spread and light intensity precipitation develops ahead of a warm front.
What is the main factor that affects the upward motion of warm air?
Warm air rises when it’s surrounded by cold air because of its lower density. Yes, that’s due to heat, but density is the main factor causing the movement here.