What is a characteristic of stable air?
Stable air masses are also characterized by smooth, undisturbed air. This quality can be seen mainly by pilots or air travelers. People flying through stable air masses will not experience violent turbulence or disturbances as they would in unstable air masses.
What does stable air mean?
Weather is strongly affected by how stable or unstable the atmosphere is. Stable air means that the weather is likely to be calm. Unstable air means that the weather might change quickly with very little warning.
What are four characteristics of stable air?
|Unstable Air||Stable Air|
|Cumuliform clouds||Stratiform clouds and fog|
|Showery precipitation||Continuous precipitation|
|Rough air (turbulence)||Smooth air|
|Good visibility, except in blowing obstructions||Fair to poor visibility in haze and smoke|
How does stable air differ from unstable air?
How does stable air differ from unstable air? Stable air resists upward movement, whereas unstable air does not. Clouds formed when stable air is forced to rise are generally thin and precipitation, if any, is moderate or light.
What causes stable air?
Normally in the atmosphere, if an air parcel rises, it will be colder than its environment (due to expansion), and it will then sink back down again. This is called a stable airmass. This condensation releases heat, which warms the air parcel, which can cause the parcel to rise higher still.
How do you determine the stability of the atmosphere?
We determine atmospheric stability by calculating the temperature of air parcels (using the dry or the moist adiabatic rate) and comparing it to that of the air surrounding the parcel ( using the environmental lapse rate).
Which would increase the stability of an air mass?
Terms in this set (33) Indicates stability: stability of the atmosphere is determined by vertical movements of air. Warm air rises when the air above is cooler. Cooling from below: surrounding air is warmer, which would increase the stability of an air mass.
What clouds have the greatest turbulence?
Although towering cumulus clouds are indications of great turbulence, the greatest turbulence is created by cumulonimbus clouds. Thunderstorms are produced from the development of cumulonimbus clouds through stages. The first stage is the cumulus stage, characterized by continuous updrafts.
What can change the relative humidity of air?
If the amount of water vapor in the air increases, the relative humidity increases, and vice versa. If the water vapor content stays the same and the temperature drops, the relative humidity increases. If the water vapor content stays the same and the temperature rises, the relative humidity decreases.
What are the four families of clouds?
For identification purposes, you need be con- cerned only with the more basic cloud types, which are divided into four ” families.” The families are: high clouds, middle clouds, low clouds, and clouds with extensive vertical development.
What clouds contain stable air?
Any clouds that form as a result will be thin and horizontal such as cirrostratus, altostratus, nimbostratus, and stratus clouds. All of these cloud types are associated with stable air.
How does an air mass maintain its stability?
A cold air mass flowing away from its source region over a warmer surface will be warmed from below making the air more unstable in the lowest layers. A warm air mass moving over a cooler surface is cooled from below and becomes stable in the lowest layers.
What is the importance of atmospheric stability?
Atmospheric stability is a measure of the atmosphere’s tendency to discourage or deter vertical motion, and vertical motion is directly correlated to different types of weather systems and their severity.
Which factor is most significant in the formation of clouds in the atmosphere?
Condensation is the process by which water vapor in the air is changed into liquid water. Condensation is crucial to the water cycle because it is responsible for the formation of clouds.
How does the air Adiabatically warm in the atmosphere?
Because it is a gas, air undergoes adiabatic heating and cooling as it experiences atmospheric pressure changes associated with changing altitudes. Compression of the air mass is accompanied by an increase in temperature. Because warmer air is less dense than cooler air, warmer air rises.