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An air mass is said to be stable when the measured adiabatic lapse rate is inferior to that of the wet air, which is 0.5 C per 100 meter. It means that warm rising air will quickly cool down to an even temperature with the surrounding air; whether that air is wet or dry.
That happens e.g. in an inversion when the air aloft is warmer than near the surface. It can cause fog, which is saturated air, yet very stable.
Unstable air masses is when the measured lapse rate is superior to that of the dry air, which is about 1 C per 100 meter, twice that of wet air. When that happens, the warm rising air parcel never gets a chance to cool down to an even temperature and keeps climbing.
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When the environmental lapse rate is between the dry and moist adiabatic lapse rates conditions are described as what?
They are called conditionally unstable,
Which will NOT cause air to become unstable?
subsidence of an air column
What makes the atmosphere unstable?
IT is unstable because it is heated from the surface. Warm air likes to rise, and since the warm air is at the surface, it will always be moving up displacing colder air. This makes the atmosphere stable, conducive to weather.
What happens when carbonic acid is unstable?
Basically the CO2 releases into the air and water is left. Its unstable because CO2 is a gas at room temp.
What three conditions are required for thunderstorms to form?
* Rising Unstable air * moisture * Air cools with an increasing altitude
When the environmental lapse rate is between the dry and moist adiabatic lapse rates conditions are described as what?
They are called conditionally unstable,
What causes air to become more unstable?
what is the only way air can become unstable
Is it possible for thunderstorms to form if the lower troposphere is conditionally stable?
Yes. Fronts, topography, or converging winds force stable unsaturated air upward to the point that clouds develop. If the air is conditionally stable, the formed clouds can surge upward and heavy precipitation can develop.
What condition are necessary for the formation of the?
a warm, moist, and unstable air massa warm, moist, and unstable air mass
What are characteristics of a moist unstable air mass?
An unstable air mass is where warm and cold air meet. A boundary forms between them. the cold air Mass may slide under the warm one and lift up weather that becomes unstable. That could mean that a storm is coming
Does unstable air is typical of cool winter air masses?
No
Which will NOT cause air to become unstable?
subsidence of an air column
What is the difference between unstable and stable air?
. Unstable air, if lifted, will rise by itself without any forcing. Stable air, if lifted, will tend to sink back down.,
What does not cause air become unstable?
water
What happens when unstable air is forced to rise?
clouds associated with the lifting of unstable air are towering and often generate thunderstorms and occasionally even a tornado.
Is unstable air necessary for a thunderstorm to develop?
Yes.
Do thunderstorms form from humid air?
Yes.Three basic ingredients are required for a thunderstorm to form: moisture, rising/unstable air, and a lifting mechanism to force this rising air higher and faster. Moisture and unstable air together is typically called humid air.
